2021/10/21 更新

写真a

ワーユディオノ
Wahyudiono
Wahyudiono
所属
大学院工学研究科 物質プロセス工学専攻 先進プロセス工学 特任助教
職名
特任助教

学位 1

  1. 博士(工学) ( 2007年3月   熊本大学 ) 

 

論文 158

  1. Molecular dynamics simulation and thermodynamic model of vapor-solid coexistence of the Lennard-Jones fluid in cylindrical nanopores

    Kanda Hideki, Hiramatsu Takeshi, Wahyudiono, Goto Motonobu

    CHEMICAL ENGINEERING SCIENCE   248 巻   2022年2月

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    記述言語:日本語   出版者・発行元:Chemical Engineering Science  

    Molecular dynamics (MD) simulations were used to study the coexistence of solids and vapors of Lennard–Jones methane condensed within cylindrical carbon nanopores. The simulated unit cell includes both the inside and outside of the pores. This allowed us to observe the solid-vapor coexistence within the pores while simulating the pressure depression of the bulk vapor outside the pores. The condensates in the pores were cooled in stages, and the equilibrium vapor pressures were determined at each temperature. The obtained vapor–solid coexistence curves showed significantly lower shifts in pressure than those in the bulk phase. The results of the MD simulations were compared with the Clausius–Clapeyron equation starting from the triple point in the nanopores. The thermodynamic model successfully predicted the simulation results without introducing tunable parameters, demonstrating this concept's validity. Thus, a whole Lennard-Jones phase diagram in cylindrical nanopores can now be predicted.

    DOI: 10.1016/j.ces.2021.117116

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  2. Thermodynamic model of extraction equilibrium in cylindrical nanopores validated with molecular dynamics simulation

    Kanda Hideki, Wahyudiono, Goto Motonobu

    CHEMICAL ENGINEERING SCIENCE   248 巻   2022年2月

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    記述言語:日本語   出版者・発行元:Chemical Engineering Science  

    Capillary phase separation (CPS) of two partially mixed Lennard-Jones (LJ) liquids in cylindrical nanopores was investigated by molecular dynamics (MD) simulations. The purpose of MD is not to reproduce reality, but to represent an ideal system that incorporates the effect of nanopores to compare it with a proposed thermodynamic equation. CPS is observed in the extraction equilibrium state, where extraction can no longer occur, and the solutes that are strongly bound to the nanopores cannot be extracted even if the solute concentration in the solvent is lower than the saturation solubility. At higher solute concentrations, the pores are filled with the solute. At lower solute concentrations, the solute was only adsorbed onto the pore wall surfaces. The CPS concentrations in various pore diameters obtained by MD were successfully predicted by the thermodynamic equation that considers interfacial tension between solvent and solute and potential from pore wall, without any adjustable parameters.

    DOI: 10.1016/j.ces.2021.117115

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  3. Molecular dynamics simulation and thermodynamic model of triple point of Lennard-Jones fluid in cylindrical nanopores

    Kanda Hideki, Hiramatsu Takeshi, Wahyudiono, Goto Motonobu

    CHEMICAL ENGINEERING SCIENCE   244 巻   2021年11月

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    記述言語:日本語   出版者・発行元:Chemical Engineering Science  

    Triple points of a Lennard-Jones (LJ) fluid in cylindrical nanopores were examined using molecular dynamics simulations. At higher temperatures, the LJ fluid was capillary-condensed and was in equilibrium with the vapour phase in the pore space. The freezing of capillary condensates in cylindrical nanopores upon cooling represented phase transitions from vapour–liquid coexistence to vapour–solid coexistence, which occurred at the triple point in the cylindrical nanopores. The triple-point pressures in the cylindrical nanopores were approximately one order of magnitude lower than those in the bulk. The triple-point temperatures in the cylindrical nanopores were not inversely proportional to the pore size. The intersection of the thermodynamic models of vapour–liquid and solid–liquid coexistence previously derived by the authors can represent the state of vapour–liquid–solid coexistence. The thermodynamic triple-point model in cylindrical nanopores was successfully used to predict the molecular dynamics in nanopores.

    DOI: 10.1016/j.ces.2021.116829

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  4. Pulsed discharge plasma in slug-flow reactor system for water pollutant removal and nanoparticle synthesis

    Wahyudiono , Machmudah S., Kanda H., Zhao Y., Goto M.

    Engineering Journal   25 巻 ( 9 ) 頁: 1 - 17   2021年9月

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    記述言語:日本語   出版者・発行元:Engineering Journal  

    The water pollutants removal and the metal nanoparticles synthesis were demonstrated by the applying high voltage discharge plasma at room temperature. The experiments were performed in continuous system by the flowing liquid and gas phases simultaneously in a glass capillary tube, where various gas types were employed as a gas phase. The optical emission spectroscopy (OES) equipment identified that the reactive oxidation species were obviously observed at each gas type. The generation rate of them can be enhanced significantly by changing the reactor type from straight to helical form. The water pollutants removal rate has order from oxygen > air > nitrogen > argon > helium. Furthermore, the silver or gold nanoparticles can be synthesized by this plasma reactor system. The transmission electron microscopy (TEM) images indicated that the particle products had spherical morphology with a diameter size smaller than 10 nm. It was deduced that the process presented here is an innovative and applicable in practice, and it can lead to advanced organic compounds degradation and nanoparticles synthesis technology.

    DOI: 10.4186/ej.2021.25.9.1

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  5. Synthesis of Cerium Dioxide Nanoparticles by Gas/Liquid Pulsed Discharge Plasma in a Slug Flow Reactor

    Zhu Wanying, Lin Yingying, Zhu Li, Wahyudiono, Honda Masaki, Kanda Hideki, Goto Motonobu

    ACS OMEGA   6 巻 ( 32 ) 頁: 20966 - 20974   2021年8月

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    記述言語:日本語   出版者・発行元:ACS Omega  

    Cerium dioxide (CeO2) nanoparticles have gained immense attention owing to their use in various applications. Current synthesis methods for CeO2 nanoparticles including hydrothermal and chemical precipitation are time-consuming and require chemical reagents. In order to shorten the reaction time and avoid the use of organic reagents, a new method for CeO2 nanoparticles synthesis in a slug flow system by atmospheric-pressure pulsed discharge plasma was proposed, which provided an easy, efficient, and continuous reaction at room temperature. Cerium nitrate was used as a feed solution, and starch was added as a stabilizer to separate the nucleation and growth processes of the nanoparticles to prevent their aggregation. The system was powered by a high voltage of 10.0 kV (peak-to-peak) from an ac power supply. The products were characterized by transmission electron microscopy (TEM), high-resolution TEM, energy-dispersive X-ray spectroscopy, and UV-vis spectroscopy. The results showed that when a circular capillary glass tube coil was used as the slug flow reactor, the amount of the CeO2 nanoparticles increased compared to the case when a straight glass tube was used. The size also increased from 3.4 to 6.3 nm. The synthesis mechanism of the CeO2 nanoparticles by gas/liquid plasma was finally elucidated.

    DOI: 10.1021/acsomega.1c02463

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  6. Molecular Dynamics Simulation of Tolman Length and Interfacial Tension of Symmetric Binary Lennard-Jones Liquid

    Kanda Hideki, Wahyudiono, Goto Motonobu

    SYMMETRY-BASEL   13 巻 ( 8 )   2021年8月

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    記述言語:日本語   出版者・発行元:Symmetry  

    The Tolman length and interfacial tension of partially miscible symmetric binary Lennard–Jones (LJ) fluids (A, B) was revealed by performing a large-scale molecular dynamics (MD) simulation with a sufficient interfacial area and cutting distance. A unique phenomenon was observed in symmetric binary LJ fluids, where two surfaces of tension existed on both sides of an equimolar dividing surface. The range of interaction εAB between the different liquids and the temperature in which the two LJ fluids partially mixed was clarified, and the Tolman length exceeded 3 σ when εAB was strong at higher temperatures. The results show that as the temperature or εAB increases, the Tolman length increases and the interfacial tension decreases. This very long Tolman length indicates that one should be very careful when applying the concept of the liquid–liquid interface in the usual continuum approximation to nanoscale droplets and capillary phase separation in nanopores.

    DOI: 10.3390/sym13081376

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  7. Surfactant-free preparation of an ostrich carotid artery scaffold using liquefied dimethyl ether and DNase

    Kanda Hideki, Ando Daigo, Oya Kento, Wahyudiono, Goto Motonobu

    ARABIAN JOURNAL OF CHEMISTRY   14 巻 ( 8 )   2021年8月

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    記述言語:日本語   出版者・発行元:Arabian Journal of Chemistry  

    Instead of combining the surfactant sodium dodecyl sulphate and DNase, a combination of liquefied dimethyl ether (DME) and DNase was used to decellularise the scaffold of ostrich carotid artery tissue. Firstly, lipids were extracted from ostrich carotid artery tissue using liquefied DME at 25 °C and a pressure of 0.59 MPa. After DME extraction, the ostrich carotid artery tissue was collected from the extraction column, and the DME remaining in the tissue was evaporated at atmospheric pressure and temperature. DNA fragmentation by DNase was then carried out using a method almost identical to the conventional method. Finally, the tissue was washed to remove fragmented DNA. The DNA was completely fragmented to a size of less than 100 bp after 1 day of DNase treatment. The residual DNA had a concentration of 28 ng/mg dry weight after 7 days of treatment with DNase. Haematoxylin and eosin staining showed that most of the cell nuclei were removed from the aortic tissue. These results indicate that the combination of liquefied DME extraction and DNase treatment eliminates the need for surfactant treatment in ostrich carotid artery tissue decellularisation. Although previous decellularisation studies have focused on porcine tissue, we herein show the potential of ostrich tissue as an alternative to alleviate religious concerns.

    DOI: 10.1016/j.arabjc.2021.103280

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  8. Preparation of Liposomes from Soy Lecithin Using Liquefied Dimethyl Ether

    Kanda Hideki, Katsube Tsubasa, Wahyudiono, Goto Motonobu

    FOODS   10 巻 ( 8 )   2021年8月

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    記述言語:日本語   出版者・発行元:Foods  

    We investigated a method to prepare liposomes; soy lecithin was dissolved in liquefied dimethyl ether (DME) at 0.56 MPa, which was then injected into warm water. Liposomes can be successfully prepared at warm water temperatures above 45◦C. The transmission electron microscopy (TEM) images of the obtained liposomes, size distribution, ζ-potential measurements by dynamic light scattering and the amount of residual medium were compared by gas chromatography using the conventional medium, diethyl ether. The size of the obtained liposomes was approximately 60–300 nm and the ζ-potential was approximately −57 mV, which was almost the same as that of the conventional medium. Additionally, for the conventional media, a large amount remained in the liposome dispersion even after removal by depressurization and dialysis membrane treatment; however, liquefied DME, owing to its considerably low boiling point, was completely removed by depressurization. Liquefied DME is a very attractive medium for the preparation of liposomes because it does not have the toxicity and residue problems of conventional solvents or the hazards of ethanol addition and high pressure of supercritical carbon dioxide; it is also environmentally friendly.

    DOI: 10.3390/foods10081789

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  9. Enhancement of Lipid Extraction from Soya Bean by Addition of Dimethyl Ether as Entrainer into Supercritical Carbon Dioxide

    Kanda Hideki, Fukuta Yuji, Wahyudiono, Goto Motonobu

    FOODS   10 巻 ( 6 )   2021年6月

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    記述言語:日本語   出版者・発行元:Foods  

    Soya beans contain a variety of lipids, and it is important to selectively separate neutral lipids from other lipids. Supercritical carbon dioxide extraction has been used as an alternative to the selective separation of neutral lipids from soya beans, usually using non-polar hexane. However, supercritical carbon dioxide extraction has a high operating pressure of over 40 MPa. On the other hand, liquefied dimethyl ether extraction, which has attracted attention in recent years, requires an operating pressure of only 0.5 MPa, but there is concern about the possibility of an explosion during operation because it is a flammable liquefied gas. Therefore, this study aims to reduce the operating pressure by using a non-flammable solvent, supercritical carbon dioxide extraction mixed with liquefied dimethyl ether as an entrainer. The extraction rate and the amount of neutral lipids extracted increased with increasing amounts of added liquefied dimethyl ether. In the mixed solvent, the amount of neutral lipids extracted was higher at an operating pressure of 20 MPa than in pure supercritical carbon dioxide extraction at 40 MPa. The mixing of liquefied dimethyl ether with supercritical carbon dioxide allowed an improvement in the extraction of neutral lipids while remaining non-flammable.

    DOI: 10.3390/foods10061223

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  10. Surfactant-Free Decellularization of Porcine Aortic Tissue by Subcritical Dimethyl Ether

    Kanda Hideki, Ando Daigo, Hoshino Rintaro, Yamamoto Tetsuya, Wahyudiono, Suzuki Shogo, Shinohara Satoshi, Goto Motonobu

    ACS OMEGA   6 巻 ( 20 ) 頁: 13417 - 13425   2021年5月

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    記述言語:日本語   出版者・発行元:ACS Omega  

    Porcine aortic tissue was decellularized by subcritical dimethyl ether (DME) used as an alternative to the surfactant sodium dodecyl sulfate. The process included three steps. For the first step, lipids were extracted from the porcine aorta using subcritical DME at 23 °C with a DME pressure of 0.56 MPa. Next, DME was evaporated from the aorta under atmospheric pressure and temperature. The second step involved DNA fragmentation by DNase, which was primarily identical to the common method. For the third step, similar to the common method, DNA fragments were removed by washing with water and ethanol. After 3 days of DNase treatment, the amount of DNA remaining in the porcine aorta was 40 ng/dry-mg, which was lower than the standard value of 50 ng/mg-dry. Hematoxylin and eosin staining showed that most cell nuclei were removed from the aorta. These results demonstrate that subcritical DME eliminates the need to utilize surfactants.

    DOI: 10.1021/acsomega.1c01549

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  11. Extraction and Micronization of β-glucan in One-step Process by Combining Subcritical Water and Supercritical Carbon Dioxide

    Wahyudiono , MacHmudah S., Kanda H., Goto M.

    IOP Conference Series: Earth and Environmental Science   672 巻 ( 1 )   2021年4月

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    記述言語:日本語   出版者・発行元:IOP Conference Series: Earth and Environmental Science  

    Subcritical water extraction was recognized as a one of the green ways to isolate plant biomass constituents. In this work, water at subcritical conditions would be subjected as a medium to isolate β-glucans from barley (Hordeum vulgare L.) and Ganoderma lucidum (G. lucidum). The experiment would be performed at 130-190 °C and 4-40 MPa in a semi batch process. The FT-IR spectra described that, at subcritical water conditions, β-glucan was removed from barley grains and G. lucidum via dehydration and decarboxylation. To enhance the separation process, supercritical carbon dioxide (CO2) is injected. To keep and to concentrate the water soluble glucan compounds in the liquid extract product, the micronization technique was performed integratedly after extraction process. SEM image illustrated that the particle generated was shriveled or dimpled and spherical with size from 1 to 6 μm, and the β-glucans content in the particle product is around 40 to 45 wt%.

    DOI: 10.1088/1755-1315/672/1/012078

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  12. Bimetallic nanoparticle generation from Au-TiO2 film by pulsed laser ablation in an aqueous medium

    Wahyudiono, Kawai Shota, Mardis Mardiansyah, Machmudah Siti, Kanda Hideki, Zhao Yaping, Goto Motonobu

    ALEXANDRIA ENGINEERING JOURNAL   60 巻 ( 2 ) 頁: 2225 - 2234   2021年4月

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    記述言語:日本語   出版者・発行元:Alexandria Engineering Journal  

    Bimetallic nanoparticle formation by applying pulsed laser ablation on the gold (Au) - titanium (TiO2) film was demonstrated. Experiments were conducted at room temperature. Au and TiO2 nanoparticles were mixed in different ratios and deposited as the starting material on silicon wafer plates, which were dried and placed in a beaker with distilled water. After a pulsed laser beam was applied, the collected aqueous solution products were analysed by ultraviolet–visible (UV–vis) spectrophotometry and characterised by scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS). The UV spectra indicated that the Au, TiO2, and Au–TiO2 nanoparticles were dispersed in the aqueous solution product. STEM-EDS images showed that spherical bimetallic nanoparticles containing gold and titanium were generated. A core of TiO2 nanoparticles was found to be well surrounded by a shell of Au nanoparticles when colloidal Au and TiO2 nanoparticles at a 1:1 ratio was used as the starting materials. The technique described here is simple and innovative, and this study enhances our understanding of bimetallic nanoparticle synthesis using a pulsed laser beam in a liquid environment.

    DOI: 10.1016/j.aej.2020.12.031

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  13. Ethanol-free extraction of resveratrol and its glycoside from Japanese knotweed rhizome by liquefied dimethyl ether without pretreatments

    Kanda Hideki, Oishi Kazuma, Machmudah Siti, Wahyudiono, Goto Motonobu

    ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING   16 巻 ( 2 )   2021年3月

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    記述言語:日本語   出版者・発行元:Asia-Pacific Journal of Chemical Engineering  

    Herein, we carried out the extraction of polyphenol resveratrol and its glycoside (piceid) from raw Japanese knotweed via a simple method, employing dimethyl ether (DME) as the solvent. With DME extraction, the conventional drying and cell wall disruption steps can be left out. As a result, more resveratrol and piceid were obtained in DME extraction than in conventional ethanol extraction. Because the Hansen solubility parameters of DME are closer to ethanol than to water, it allowed us to extract resveratrol and piceid from raw Japanese knotweed, unlike water. Simultaneously, 83.5% of the initial water and 213 mg/g dry of organic extracts were extracted from raw Japanese knotweed. As DME extraction does not involve drying and grinding of the decomposed antioxidants, it is highly suitable for extracting antioxidants.

    DOI: 10.1002/apj.2600

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  14. Hydrothermal Synthesis: Low-Temperature Subcritical Water for Ceria-Zirconia Mixed Oxides Preparation

    Machmudah Siti, Widiyastuti Widiyastuti, Wahyudiono Wahyudiono, Winardi Sugeng, Kanda Hideki, Goto Motonobu

    INDONESIAN JOURNAL OF CHEMISTRY   21 巻 ( 1 ) 頁: 1 - 13   2021年2月

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    記述言語:日本語   出版者・発行元:Indonesian Journal of Chemistry  

    A low-temperature hydrothermal synthesis technique was employed as a medium to produce ceria−zirconia mixed oxides particles at temperatures of 200–300 °C and pressure of 10 MPa in a batch process. At these conditions, the average crystallite sizes of ceria−zirconia mixed oxides increased slightly with increasing reaction temperature when the feed solution containing ceria and zirconia with a ratio of 1:1 was fed. SEM images illustrated that the morphologies of the ceria−zirconia mixed oxides particles were spherical and spherical−like with a diameter of around 100 nm. The EDX spectrum indicated that the signal corresponding to the ceria and the zirconia elements at 5 and 2 keV, respectively, were strongly detected in the products. The XRD pattern revealed that the mixed metal oxides particle products that comprised of cerium and zirconium oxides particles with cubic and monoclinic structures, respectively, were affected by their molar content in the feed solution.

    DOI: 10.22146/ijc.47357

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  15. Phytochemical compounds extraction from medicinal plants by subcritical water and its encapsulation via electrospraying

    Machmudah S., Wahyu Fitriana M., Fatbamayani N., Wahyudiono , Kanda H., Winardi S., Goto M.

    Alexandria Engineering Journal     2021年

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    記述言語:日本語   出版者・発行元:Alexandria Engineering Journal  

    In this study, phytochemical compounds were extracted and encapsulated from medicinal plants such as M. oleifera, S. androgynus, and S. grandiflora using subcritical water and the electrospraying technique. The extraction was conducted at temperatures of 120 to 160 °C at various extraction pressures from 1 to 10 MPa in semi-batch systems with a 1.0 mL min−1 flow rate. Under these conditions, the starting materials, that is the medicinal plants, underwent thermal cleavage, allowing the removal of their components. The Fourier transform infrared spectroscopy (FT-IR) spectra of the solid residues indicated that phytochemical compounds were successfully extracted from these medicinal plants. The results revealed that the amounts of extracted phenolic compounds did not increase linearly with increasing extraction temperatures and pressures. The amounts of extracted phenolic compounds could approach 82.26 (140 °C, 5 MPa), 75.32 (160 °C, 5 MPa), and 78.91 (160 °C, 10 MPa) mg of gallic acid equivalents (GAE)/g of dried samples for M. oleifera, S. androgynus, and S. grandiflora, respectively. When the extracted phytochemical compounds were encapsulated with polyvinylpyrrolidone (PVP) via the electrospraying technique, the particle products seemed to exhibit spherical morphologies with diameters less than 1 μm, and the FT-IR spectra of these particle products showed that the medicinal plant extracts were successfully encapsulated by PVP through this technique.

    DOI: 10.1016/j.aej.2021.07.033

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  16. Yield and extraction rate analysis of phytochemical compounds from eucheuma cottonii, ganoderma lucidum, and gracilaria sp. Using subcritical water extraction

    Kristianto F.P., Machmudah S., Winardi S., Wahyudiono , Goto M.

    ASEAN Journal of Chemical Engineering   21 巻 ( 1 ) 頁: 27 - 37   2021年

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    記述言語:日本語   出版者・発行元:ASEAN Journal of Chemical Engineering  

    Eucheuma cottonii (E. cottonii), Ganoderma lucidum (G. lucidum), and Gracilaria sp. are plants that contain high phytochemicals, such as flavonoids, polyphenols, saponins, and tannins. In this work, the phytochemicals were obtained using the subcritical water extraction (SWE) process. The SWE method uses water as a solvent in subcritical conditions. Therefore, the SWE process is an environmentally friendly process for extraction. In order to run the SWE process optimally, measurement of the extraction rate of SWE is needed. Calculation of the extraction rate of SWE process used first and second-order models according to Lagergren equation. SWE process was started by setting temperatures from 140 to 180oC at a pressure of 7 MPa and solvent flow rate of 1 ml/min. Before starting the extraction, the raw material was loaded into the extractor. The raw materials used were E. cottonii, G. lucidum, and Gracilaria sp. The extraction process was carried out for 3 hours, and the product was collected every 30 minutes. The collected product was put into a sample bottle and dried using a freeze dryer. After that, the products obtained were balanced by an analytical scale. Based on the result, the optimum temperature for the SWE process was 180oC for E. cottonii and G. lucidum and 160oC for Gracilaria sp. The yields of the SWE process under the optimum temperature were 85.37%, 58.42%, and 75.73% for E. cottonii, G. lucidum, and Gracilaria sp, respectively. The extract contained phytochemical compounds detected by highperformance liquid chromatography analysis. The kinetics model of extraction rate for all variables exhibited a second-order kinetics model that indicated that the extraction process was influenced by more than one factor.

    DOI: 10.22146/ajche.60513

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  17. Synthesis of titanium dioxide nanoparticle by means of discharge plasma over an aqueous solution under high-pressure gas environment

    Wahyudiono , Kondo H., Machmudah S., Kanda H., Zhao Y., Goto M.

    Alexandria Engineering Journal     2021年

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    記述言語:日本語   出版者・発行元:Alexandria Engineering Journal  

    In this study, the utilization of an electric field generated by the high voltage discharge plasma over a liquid water surface containing glycine compound to synthesize titanium dioxide (TiO2) nanoparticles was demonstrated. The experiments were conducted in a batch-type system with applied voltages ranging from 18.6 − 23.4 kV under various pressurized gases at room temperature. The results indicated that the applied voltages, applied pulse numbers, and pulsed repetition rates had a significant influence on the decomposition reaction of glycine compounds and titanium rod electrode erosion. The ultraviolet − visible (UV − vis) spectra showed that titanium dioxide nanoparticles could be observed in each solution product, and most of them were brookite-type structures. According to the HRTEM images, TiC was also produced as a nanoparticle product. Based on the experimental results, this process is applicable and could result in advanced metal-based nanoparticle synthesis technology.

    DOI: 10.1016/j.aej.2021.08.081

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  18. Water removal from wood biomass by liquefied dimethyl ether for enhancing heating value 査読有り

    Machmudah Siti, Wicaksono Dimas Tiar, Happy Mary, Winardi Sugeng, Wahyudiono, Kanda Hideki, Goto Motonobu

    ENERGY REPORTS   6 巻   頁: 824 - 831   2020年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Energy Reports  

    Liquefied dimethyl ether (DME) was used as the dewatering solvent to remove water from Tectona grandis L.f. (T. grandis L.f.), Shorea sp., and Cinnamomum camphora (C. camphora) biomass wood. The experiments were performed at 27 °C (room temperature) and at a pressure of ∼0.59 MPa using a batch system. The results showed that 13–25 g of liquefied DME removed 1 g of water from the wood chip biomass matrix with a water content of 10%–40%. The UV–vis spectra of the collected liquid extract indicated the presence of some wood biomass-derived compounds. The FT-IR spectra revealed that the functional group compositions of the wood chip biomass samples before and after DME dewatering were identical. In addition, the heating value of wood chip biomass samples increased by 754–1570 kJ/kg after dewatering.

    DOI: 10.1016/j.egyr.2020.04.006

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  19. Ethanol-free antisolvent crystallization of glycine by liquefied dimethyl ether

    Kanda Hideki, Katsube Tsubasa, Hoshino Rintaro, Kishino Mitsuhiro, Wahyudiono, Goto Motonobu

    HELIYON   6 巻 ( 10 ) 頁: e05258   2020年10月

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    記述言語:日本語   出版者・発行元:Heliyon  

    Liquefied dimethyl ether (DME) was employed as an antisolvent to crystallize glycine from its aqueous solution. The proposed method can be performed at 20–25 °C and has the potential to reduce the energy consumption of drying or crystallizing using ethanol. α-Glycine crystals were successfully obtained from glycine aqueous solutions by mixing in liquefied DME, which was easily removed from the crystals by decompression. Contact with a liquefied DME/water mixture and small γ-glycine crystals resulted in the α-glycine converting to γ-glycine. This was only observed for saturated glycine solutions. We speculated that this conversion occurs via a solution-mediated transition. Pure liquefied DME is not capable of promoting solvent-mediated transitions, so saturated glycine solutions treated with the pure antisolvent can give α-glycine as the sole product. Food science, Chemical engineering, Materials, Chemistry, Natural product, Amino acid, Crystallization, Antisolvent, Subcritical fluid.

    DOI: 10.1016/j.heliyon.2020.e05258

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  20. Direct Extraction of Lutein from Wet Macroalgae by Liquefied Dimethyl Ether without Any Pretreatment

    Kanda Hideki, Wahyudiono, Machmudah Siti, Goto Motonobu

    ACS OMEGA   5 巻 ( 37 ) 頁: 24005 - 24010   2020年9月

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    記述言語:日本語   出版者・発行元:ACS Omega  

    Extraction of lutein from raw macroalgae Monostroma nitidum was conducted using a simple method employing dimethyl ether (DME) as a solvent. DME extraction enabled omission of conventional drying and cell wall disruption steps, yielding 0.30 mg/g dry lutein from wet M. nitidum. The yield of extracted lutein was higher than that by chloroform-methanol extraction from freeze-dried and cell-disrupted M. nitidum. DME extraction provides a safe, eco-friendly approach that combines high yields of lutein with unheated drying of wet macroalgae in a single step.

    DOI: 10.1021/acsomega.0c03358

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  21. Effect of solvent selection and nozzle geometry on Curcuma mangga micronization process using supercritical antisolvent: Experiment and CFD simulation 査読有り

    Lestari Sarah Duta, Machmudah Siti, Winardi Sugeng, Nurtono Tantular, Wahyudiono, Kanda Hideki, Goto Motonobu

    FOOD AND BIOPRODUCTS PROCESSING   123 巻   頁: 367 - 377   2020年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Food and Bioproducts Processing  

    In this study, ethanolic extracts of Curcuma mangga (C. mangga) were micronized using the supercritical antisolvent (SAS) method. Acetone, ethyl acetate, and dichloromethane were used as solvents to study the effects of solvent selection on the obtained particles. Supercritical carbon dioxide (CO2) was used as the antisolvent. The effects of nozzle geometry (cross nozzle and T-nozzle) on particle size and morphology were also evaluated. Microparticles and submicron particles were successfully produced with particle sizes ranging from 0.202 ± 0.05 μm to 1.653 ± 0.89 μm. Of the three solvents, ethyl acetate produced smaller particle sizes with a narrow particle size distribution. For all the types of solvents used, micronized particles prepared with the cross-nozzle had smaller average particle sizes than with the T-nozzle. The smallest particles of mean size 0.202 ± 0.05 μm were achieved at 16 MPa and 313 K using ethyl acetate as the solvent and a cross-nozzle. Computational fluid dynamics simulations were successfully performed on the internal flow to study the turbulent flow and volume fraction inside the nozzle. The results of this are expected to help improve the applications of the active ingredients of C. mangga rhizomes in the pharmaceutical industry.

    DOI: 10.1016/j.fbp.2020.07.016

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  22. Atmospheric-Pressure Pulsed Discharge Plasma in a Slug Flow Reactor System for the Synthesis of Gold Nanoparticles 査読有り

    Yamada Motoki, Wahyudiono, Machmudah Siti, Kanda Hideki, Zhao Yaping, Goto Motonobu

    ACS OMEGA   5 巻 ( 28 ) 頁: 17679 - 17685   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACS Omega  

    Gold nanoparticle (AuNP) formation by applying pulsed discharge plasma in the slug flow reactor system was demonstrated. Experiments were carried out continuously at room temperature. The argon gas as a gas phase and the hydrogen tetrachloroaurate(III) tetra hydrate solution containing lysine as a liquid phase simultaneously flowed in the slug flow reactor system. The flow rates of the feed solution and argon gas were kept at 1.5 and 0.2 mL/min, respectively. To generate discharge plasma, the AC power supply with a bipolar pulsed output at 10 kV was applied. The purple color solution product was obtained, and the ultraviolet-visible (UV-vis) spectrophotometer showed that this possessed the absorption light from 510 to 550 nm associated with the existence of gold nanoparticles in each collected sample. Transmission electron microscopy (TEM) revealed that the lysine-capped AuNPs were produced in a spherical morphology and dispersed in aqueous solution products with a diameter of less than 20 nm.

    DOI: 10.1021/acsomega.0c02217

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  23. Preparation of liposomes encapsulating beta-carotene using supercritical carbon dioxide with ultrasonication 査読有り

    Tanaka Yukako, Uemori Chiho, Kon Tatsuhiko, Honda Masaki, Wahyudiono, Machmudah Siti, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   161 巻   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    β –Carotene-loaded liposomes were prepared utilizing ultrasonication and supercritical carbon dioxide (SC-CO2) as an alternative to organic solvents. Thermally Z–isomerized β–carotene samples containing 2.4, 37, or 87 % Z–isomers were fed with hydrogenated soy phosphatidylcholine. Pressure and temperature were changed in ranges 10–25 MPa and 50–70 °C, respectively, and isomerization ratio was changed. Transmission electron microscopy revealed ∼90–150 nm spherical liposomes. Ultraviolet–visible spectroscopy indicated that β–carotene aqueous nanosuspensions formed more effectively when Z–isomer-rich β–carotene was used as a starting material. Zeta potentials indicated that soy-phosphatidylcholine-based Z–isomer-containing β–carotene aqueous nanosuspensions showed good stability.

    DOI: 10.1016/j.supflu.2020.104848

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  24. Nonthermal Atmospheric Pressure Plasma for Methylene Blue Dye Decolorization by Using Slug Flow Reactor System 査読有り

    Yamada Motoki, Wahyudiono, Machmudah Siti, Kanda Hideki, Goto Motonobu

    PLASMA CHEMISTRY AND PLASMA PROCESSING   40 巻 ( 4 ) 頁: 985 - 1000   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Plasma Chemistry and Plasma Processing  

    Abstract: Non-equilibrium pulsed discharge plasma using a gas–liquid slug flow in a glass column as a plasma reactor is developed and applied to methylene blue (MB) dye decolorization in aqueous wastewater. By flowing the solution and gas simultaneously in the slug flow system, the interval of the bubbles could be controlled and adjusted for each flow rate. After the slug flow became steady, an electrical discharge was introduced into the system using an AC power supply with a bipolar pulsed output voltage to generate plasma in the bubbles between the electrodes with a high applied voltage. The decolorization rate of the MB dye was determined by UV–Vis absorption spectroscopy. Based on the experimental results, it was determined that approximately 90% of the MB dye was decolorized for one-time treatment in oxygen and argon in a gaseous phase. This suggests that the oxygen-based reactive species derived from oxygen gas were effective as oxidizing agents, whereas short lifetime OH radicals were mainly produced and decolorized the MB dye in the case of argon and helium gas. Graphic Abstract: [Figure not available: see fulltext.].

    DOI: 10.1007/s11090-020-10066-2

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  25. One-Step Preparation of Z-Isomer-Rich beta-Carotene Nanosuspensions Utilizing a Natural Catalyst, Allyl Isothiocyanate, via Supercritical CO2 査読有り

    Zhang Yelin, Honda Masaki, Fukaya Tetsuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    SYMMETRY-BASEL   12 巻 ( 5 )   2020年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Symmetry  

    This study aims to improve the production efficiency of β-carotene suspensions using a naturally occurring Z-isomerization-accelerating catalyst, allyl isothiocyanate (AITC), via supercritical CO2 (SC-CO2). Namely, utilizing solubility improvement of β-carotene with the Z-isomerization by adding AITC in the SC-CO2-used dispersion process, the encapsulation efficiency of β-carotene was enhanced. The dispersion of β-carotene was conducted by ultrasonic treatment, and there was no involvement of organic solvents in the whole process. When 100 mg of AITC was added in the dispersion process, the encapsulation efficiency (β-carotene content in resulting suspension) was approximately 3.5 times higher than that without addition of the catalyst. Moreover, the Z-isomer ratio of β-carotene in the suspensions significantly improved, that is, it was approximately 12 times higher than the raw β-carotene material. Since Z-isomers of β-carotene are known to have higher antiatherosclerotic and antiatherogenic activities compared to the all-E-isomer, this one-step method not only efficiently produces β-carotene suspensions without organic solvents but also enhances the bioactivities of them.

    DOI: 10.3390/sym12050777

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  26. Ultrasonic-Enhanced Fabrication of Metal Nanoparticles by Laser Ablation in Liquid 査読有り

    Hu Xin, Takada Noriharu, Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   59 巻 ( 16 ) 頁: 7512 - 7519   2020年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Industrial and Engineering Chemistry Research  

    Laser ablation in liquid (LAL) is known to be a promising method for synthesizing metal nanoparticles. In this study, gold and silver nanoparticles were fabricated by ultrasonic-assisted LAL. Gold and silver plates were ablated using a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser, with a wavelength of 532 nm and energy of 26.4 J cm-2, in distilled water in the presence and absence of an ultrasonic field. The fabricated nanoparticle colloidal solution was analyzed with an ultraviolet-visible (UV-vis) spectrometer, a transmission electron microscope (TEM) with energy-dispersive X-ray spectroscopy (EDS), and ζ-potential measurement. The craters on the silver plates were analyzed by a scanning electron microscope (SEM), a laser microscope, and MATLAB to observe their morphology and calculate the volume to obtain the concentration of the fabricated nanoparticle solution. Optical emissions were observed to study the characteristics of the laser. The results showed that ultrasonic-assisted LAL has considerable potential for fabricating superior metal nanoparticles.

    DOI: 10.1021/acs.iecr.9b06384

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  27. Formation of Fine Particles from Curcumin/PVP by the Supercritical Antisolvent Process with a Coaxial Nozzle 査読有り

    Machmudah Siti, Winardi Sugeng, Wahyudiono, Kanda Hideki, Goto Motonobu

    ACS OMEGA   5 巻 ( 12 ) 頁: 6705 - 6714   2020年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACS Omega  

    The production of fine particles via the supercritical carbon dioxide (SC-CO2) antisolvent process was carried out. The experiments were conducted at temperatures of 40-60 °C and pressures of 8-12 MPa with a 15 mL min-1 carbon dioxide (CO2) and 0.5 mL min-1 feed solution flow rate. As a feed solution, the curcumin and the polyvinylpyrrolidone (PVP) powder were dissolved in acetone and ethanol at concentrations of 1.0 mg mL-1 and 2.0-4.0% in weight, respectively. Scanning electron microscopy (SEM) images described that most of the precipitated particle products have spherical morphologies with a size of less than 1 μm. The Fourier transform infrared spectroscopy (FT-IR) spectra exhibited that the curcumin structural properties did not shift after the SC-CO2 antisolvent process. Moreover, the PVP addition in the curcumin particle products can enhance the curcumin dissolution in distilled water significantly.

    DOI: 10.1021/acsomega.9b04495

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  28. DC-Plasma over Aqueous Solution for the Synthesis of Titanium Dioxide Nanoparticles under Pressurized Argon 査読有り

    Wahyudiono, Kondo Hiroki, Yamada Motoki, Takada Noriharu, Machmudah Siti, Kanda Hideki, Goto Motonobu

    ACS OMEGA   5 巻 ( 10 ) 頁: 5443 - 5451   2020年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACS Omega  

    Nanomaterials that comprise titanium dioxide (TiO2) nanoparticles have received much attention owing to their wide applications; presently, the green synthesis of TiO2 nanoparticles is a developing research area. In this study, the TiO2 nanoparticles were synthesized through a DC-pulsed discharge plasma over an aqueous solution surface under a high-pressure argon environment. The titanium-rod electrode was utilized as the material source for the TiO2 nanoparticle generation. Experiments were performed at room temperature with pressurized argon at 1-4 MPa. To generate a pulse electrical discharge plasma, a DC power supply of 18.6 kV was applied. The Raman spectroscopy showed that the TiO2 nanoparticle with a brookite structure was formed dominantly. The scanning transmission electron microscopy equipped with energy dispersion spectroscopy (STEM coupled with EDS) indicated that TiO2 coated with carbon and that without carbon coating were successfully produced at the nanoscale. The process presented here is an innovative process and can update the existing information regarding the synthesis of metal-based nanoparticles using pulsed discharge plasma under an argon environment.

    DOI: 10.1021/acsomega.0c00059

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  29. Lipid extraction from microalgae covered with biomineralized cell walls using liquefied dimethyl ether 査読有り

    Kanda Hideki, Hoshino Rintaro, Murakami Kazuya, Wahyudiono, Zheng Qingxin, Goto Motonobu

    FUEL   262 巻   2020年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Fuel  

    Cell disruption is regarded as an indispensable pretreatment step before the extraction of microalgae with biomineralized cell walls. Here, two typical microalgae—diatom Chaetoceros gracilis (C. gracilis) and coccolithophore Pleurochrysis carterae (P. carterae)—covered by “hard” biomineralized cell walls were used as starting materials for lipid extraction using liquefied dimethyl ether (DME) without any pretreatment such as drying or cell disruption. The liquefied DME extraction experiments were performed at 25 °C and 0.59 MPa using a semi-continuous, flow-type system. The results of the yield, elemental composition, molecular weight distribution, fatty acid composition, and trace element composition indicated that the performance of liquefied DME extraction was similar to that of Bligh–Dyer extraction and better than that of hexane Soxhlet extraction, despite the latter two methods requiring pre-drying and cell disruption processes. It was also proven that the cell wall of microalgae would not affect lipid extraction of liquefied DME, thereby the liquefied DME extraction method is suitable for extracting lipids from microalgae with biomineralized cell walls. Besides, the lipids extracted by liquefied DME can be further used for biodiesel production.

    DOI: 10.1016/j.fuel.2019.116590

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  30. Room-temperature extraction of direct coal liquefaction residue by liquefied dimethyl ether 査読有り

    Zheng Qingxin, Zhang Yelin, Wahyudiono, Fouquet Thierry, Zeng Xi, Kanda Hideki, Goto Motonobu

    FUEL   262 巻   2020年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Fuel  

    Direct coal liquefaction residue (DCLR) is the main byproduct during the direct coal liquefaction process. The efficient recovery of organic components from DCLR at low temperatures is beneficial for improving the economy and reducing energy consumption and environmental pollution. Here, DCLR was extracted using liquefied dimethyl ether (DME), acetone, and hexane as the solvents. Compared with the other two solvent Soxhlet extraction, the DME extraction process was performed at room temperature with the shortest extraction time, the lowest energy consumption, and the highest extraction yield (16.2%). Owing to the high carbon contents, low sulfur and oxygen contents, and low ash contents (<0.1%), the extracts obtained using liquefied DME and acetone naturally became the feedstock of carbon materials. Based on the results of the gas chromatography-mass spectrometry analysis, the extracts obtained using the three different solvents had similar compositions in light compounds and were abundant in polycyclic aromatic hydrocarbons with two-, three-, four-, five-, and six-membered benzene rings, indicating that all three DCLR extracts are potential raw materials for preparing high value-added carbon materials. Furthermore, the molecular composition analysis revealed that the room-temperature extraction using liquefied DME was as good as high-temperature Soxhlet extraction using acetone, considering the similarity of their compositions in high molecular weight species and the considerably higher efficiency than that of high-temperature Soxhlet extraction using hexane. Due to the low energy consumption, short extraction time, high extraction yield, and high performance of the extract, liquefied DME is an efficient and economic solvent for extracting DCLR.

    DOI: 10.1016/j.fuel.2019.116528

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  31. Enhanced production of beta-carotene suspensions using supercritical CO2 via naturally occurring Z-isomerization-accelerating catalyst 査読有り

    Zhang Yelin, Honda Masaki, Wahyudiono, Kanda Hideki, Goto Motonobu

    26TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2019)   778 巻 ( 1 )   2020年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IOP Conference Series: Materials Science and Engineering  

    β-carotene has high antioxidant activity and its adequate intake can reduce the risk of various diseases. Thus, β-carotene can be utilized as a dietary supplement and valuable natural food colorant. Z-isomerization of β-carotene can reduce the crystallinity of (all-E)-β-carotene and improve the solubility of it in solvents. Preparing nanosuspensions of Z-isomer-rich β-carotene can improve the dispersibility of β-carotene in water and bioavailability of it. In previous work, Z-isomerization and encapsulation process of β-carotene was implemented in two separated steps. In this work, organic catalyst derived from plants was utilized for Z-isomerization of β-carotene. The Z-isomerization and emulsification-evaporation process were conducted simultaneously under supercritical CO2 assisted by ultrasound. β-carotene suspension produced in this work was characterized by UV-vis, HPLC and DLS. The nanosuspensions rich in Z-isomers of β-carotene has been successfully prepared using allyl isothiocyanate (AITC) as the catalyst for Z-isomerization. When the distributed processing was performed with 50mg, 100 mg AITC, the encapsulation efficiency and Z-isomerization ratio in the suspensions were approximately 6 times and 13 times higher than those of no catalyst. Adding AITC in the emulsification-evaporation process using SC-CO2 as a Z-isomerization-accelerating catalyst improved not only the Z-isomerization ratio of βcarotene but also the encapsulated β-carotene content in suspensions.

    DOI: 10.1088/1757-899X/778/1/012008

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  32. Fabrication of chitosan particles through a coaxial nozzle under pressurized carbon dioxide 査読有り

    Wahyudiono, Anthony Susilo, Siti Machmudah, Hideki Kanda, Motonobu Goto

    Asia-Pacific Journal of Chemical Engineering   15 巻   頁: e2466   2020年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  33. Synthesis and Modification of Metal Nanoparticles by Plasma over an Aqueous Solution under Pressurized Argon 査読有り

    Wahyudiono, Kondo Hiroki, Yamada Motoki, Takada Noriharu, Machmudah Siti, Kanda Hideki, Goto Motonobu

    26TH REGIONAL SYMPOSIUM ON CHEMICAL ENGINEERING (RSCE 2019)   778 巻 ( 1 )   2020年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IOP Conference Series: Materials Science and Engineering  

    Metal-based nanoparticles have been used in diverse industrial applications owing to their physicochemical properties. Here, the electric field produced by pulsed high-voltage discharge plasma over an aqueous solution surface that was generated under high-pressure argon environment would be employed to synthesis and to modify metal materials. The plasma reactor was made of stainless steel and contained two sapphire windows to monitor the plasma performance. The experiments were conducted at room temperature (25 - 28 °C) with argon environment at a pressure of 3.0 MPa and the DC power supply at 18.6 kV was introduced into the reactor through the electrode to generate pulse electrical discharge plasma. The metal rod electrode which was used as a material source for nanoparticles generation was placed over an aqueous solution containing glycine, as carbon source, to introduce electrical discharge plasma. The scanning transmission electron microscopy which was equipped with energy dispersion spectroscopy (STEM coupled with EDS) indicated that titanium dioxide and iron oxide with and without carbon covered were successfully produced in nano-scale (<100 nm).

    DOI: 10.1088/1757-899X/778/1/012018

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  34. Synthesis and Modification of Metal Nanoparticles by Plasma over an Aqueous Solution under Pressurized Argon 査読有り

    Wahyudiono, Hiroki Kondo, Motoki Yamada, Noriharu Takada, Siti Machmudah, Hideki Kanda, Motonobu Goto

    IOP Conference Series: Materials Science and Engineering   778 巻   頁: 012018   2020年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  35. Micronization of hydrothermally extracted phytochemical compounds from Gracilaria sp using electrospraying

    Setyorini D., Machmudah S., Winardi S., Wahyudiono W., Goto M.

    Key Engineering Materials   840 KEM 巻   頁: 173 - 179   2020年

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    記述言語:日本語   出版者・発行元:Key Engineering Materials  

    The hydrothermal extraction was carried out in a semi-batch extractor at a temperature of 160 °C, pressure of 7 MPa, and a water flow rate of 1 mL/min. Electrospraying was conducted at various voltages of 12, 14, and 16 kV, various distances between tip and collector of 6, 8 and 10 cm, precursor solution flow rate of 0.05 mL/h, and PVP concentrations of 6 and 8%. Particles obtained from electrospraying process were analyzed by SEM, FTIR, and spectrophotometer. The antioxidant efficiency (AE) of the particles was also examined. Based on the results, the morphology of particles was spherical with diameter less than 3 µm. The highest value of AE was 0.1058 min-1, which indicated that Gracilaria sp extract in the particles produced by electrospraying has good antioxidant activity. In the FTIR analysis, carrageenan and flavonoids were contained in the particles. The result indicated that hydrothermal extraction followed by electrospraying process could be one alternative process for obtaining the best phytochemical particles.

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  36. Correlation of extract composition on antioxidant activity of electrospun polyvinylpyrrolidone/bassela rubra linn leaf extract composite

    Septiani E.L., Gabriel A.A., Prastuti O.P., Indahsari D.N., Ariyanti E.D., Machmudah S., Winardi S., Wahyudiono , Kanda H., Goto M.

    Key Engineering Materials   851 KEM 巻   頁: 122 - 127   2020年

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    記述言語:日本語   出版者・発行元:Key Engineering Materials  

    Nanofiber through electrospinning process has been developed as a promising material for wound dressing due to its large porosity and high surface area. This characteristic of nanofiber provides an adequate gas permeability surrounding the wound which prevents the healing failure. The best wound dressing not only maintain a wound to have a good gas permeability but also to have an active agent giving an antibacterial and antiinflammation property. This research aims to combine a synthetic polymer and active agent, polyvinylpyrrolidone (PVP) and Bassela rubra linn leaf extract (BRLE), become nanofibrous material. The electrospinning process was conducted in two steps. The first step is to obtain the best voltage of PVP electrospinning by using the voltage of 10, 12, 15, 17 kV. The other step is combining PVP to 2%, 5%, 8% of BRLE. The first step shows the best operation condition is using 12 kV. Hence, it is used to obtain nanofiber with different BRLE percentage. Based on 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, the result indicates that increase the BRLE composition will rise the antioxidant activity because of the smaller diameter size.

    DOI: 10.4028/www.scientific.net/KEM.851.122

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  37. Pressurized hot water extraction of carrageenan and phenolic compounds from Eucheuma Cottonii and Gracilaria SP.: Effect of extraction conditions 査読有り

    Machmudah S., Widiyastuti, Wahyudiono, Kanda H., Winardi S., Goto M.

    ARPN Journal of Engineering and Applied Sciences   14 巻 ( 18 ) 頁: 3113 - 3123   2019年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ARPN Journal of Engineering and Applied Sciences  

    This work was focused on the investigation of the extraction parameters influence on the yield of carrageenan and phenolic components as well as the antioxidant activity of extracts. Pressurized hot water extraction of carrageenan and phenolic components from Eucheuma cottonii (E. cottonii) and Gracilaria sp. was performed in a semi-batch system at various pressures of 1 - 10 MPa and temperatures of 120 - 200 oC. Carrageenan and phenolic compounds were characterized by using FT-IR and UV-vis spectrophotometer. The yields of carrageenan and phenolic components were strongly influenced by the alteration of extraction temperature. The highest extraction yield was resulted at 200 oC for 97% of carrageenan yield and 22 mg gallic acid equivalent (GAE)/g of dried sample for phenolic components extracted from E. cottonii. The results confirmed that pressurized hot water extraction is an effective technique to isolate bioactive components from macroalgae and can be an advanced technique for utilization of biomass components.

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  38. Electrospraying technique under pressurized carbon dioxide for hollow particle production 査読有り

    Wahyudiono, Ozawa Hiroyuki, Machmudah Siti, Kanda Hideki, Goto Motonobu

    REACTIVE & FUNCTIONAL POLYMERS   142 巻   頁: 44 - 52   2019年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Reactive and Functional Polymers  

    Fabrication of polyvinylpyrrolidone (PVP)particles by an electrospraying process under pressurized carbon dioxide (CO2)used as an anti-solvent was studied. The process was carried out at a constant temperature with CO2 pressures ranging from 1 to 6 MPa. A fixed applied voltage (17 kV)was employed to generate electric field. PVP powder dissolved in dichloromethane (DCM)at concentrations of 4, 6, and 8 wt% was used as the starting material. Scanning electron microscopy observations indicated that the electrosprayed PVP particles produced at 1–3 MPa using 8 wt% PVP solutions have spherical morphologies. At a similar concentration, increasing the CO2 pressure up to 6 MPa resulted in particle strings and strings as major products. Interestingly, hollow core particles formed when ethanol was added as a secondary solvent for controlling the evaporation rate of DCM during the electrospraying process under pressurized CO2. The FT–IR spectra revealed that the structural properties of PVP did not change after the electrospraying process. This work demonstrates that electrohydrodynamic processes under pressurized CO2 are likely to be fruitful for the fabrication of organic polymers with hollow cores.

    DOI: 10.1016/j.reactfunctpolym.2019.05.016

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  39. Improved carotenoid processing with sustainable solvents utilizing Z-isomerization-induced alteration in physicochemical properties: A review and future directions 査読有り

    Honda M., Kageyama H., Hibino T., Zhang Y., Diono W., Kanda H., Yamaguchi R., Takemura R., Fukaya T., Goto M.

    Molecules   24 巻 ( 11 )   2019年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Molecules  

    Carotenoids-natural fat-soluble pigments-have attracted considerable attention because of their potential to prevent of various diseases, such as cancer and arteriosclerosis, and their strong antioxidant capacity. They have many geometric isomers due to the presence of numerous conjugated double bonds in the molecule. However, in plants, most carotenoids are present in the all-E-configuration. (all-E)-Carotenoids are characterized by high crystallinity as well as low solubility in safe and sustainable solvents, such as ethanol and supercritical CO2 (SC-CO2). Thus, these properties result in the decreased efficiency of carotenoid processing, such as extraction and emulsification, using such sustainable solvents. On the other hand, Z-isomerization of carotenoids induces alteration in physicochemical properties, i.e., the solubility of carotenoids dramatically improves and they change from a “crystalline state” to an “oily (amorphous) state”. For example, the solubility in ethanol of lycopene Z-isomers is more than 4000 times higher than the all-E-isomer. Recently, improvement of carotenoid processing efficiency utilizing these changes has attracted attention. Namely, it is possible to markedly improve carotenoid processing using safe and sustainable solvents, which had previously been difficult to put into practical use due to the low efficiency. The objective of this paper is to review the effect of Z-isomerization on the physicochemical properties of carotenoids and its application to carotenoid processing, such as extraction, micronization, and emulsification, using sustainable solvents. Moreover, aspects of Z-isomerization methods for carotenoids and functional difference, such as bioavailability and antioxidant capacity, between isomers are also included in this review.

    DOI: 10.3390/molecules24112149

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  40. NUMERICAL STUDY OF THE HYDRODYNAMIC CHARACTERISTICS IN AN AGITATED TANK WITH SIDE-ENTRY MIXER: THE EFFECT OF STIRRER ENTRY ANGLE 査読有り

    Fathonah Ni'am N., Nurtono Tantular, Kusdianto, Madhania Suci, Wahyudiono, Winardi Sugeng

    INTERNATIONAL JOURNAL OF TECHNOLOGY   10 巻 ( 3 ) 頁: 521 - 530   2019年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Technology  

    The main objective of this work is to study the effect of stirrer entry angle β on the hydrodynamic characteristics in an agitated tank with side-entry mixer (side-entry mixing tank) using the CFD simulation method. For validation purposes, the simulation results were compared with the experimental results. Qualitatively, it was found that there was a similar fluid flow in the simulation and experiment results. The agitated tank system consisted of a 40 cm diameter cylindrical tank and a three-blade marine propeller with 4 cm diameter. The working fluid was water, with a liquid height of 40 cm. The rotational speed varied between 100-400 rpm, with the stirrer entry angle (β) set at 0°, 10° and 15° (right-hand side). The modelling configurations used in the simulation were an RNG Standard k-ε model as a turbulence model, coupled with a Multiple Reference Frame (MRF) for the propeller motion approach method in transient conditions. The results show that simulation configuration MRF-RNG k-ε produced realistic results to describe the hydrodynamic characteristics in the side-entry stirred tank. This is supported by the simulation results, which qualitatively produced similar flow patterns in the simulation and experiment. In the quantitative analysis, at higher rotational speeds the circulation flow formed tended to be pushed further from the impeller discharge, which is supported by the average velocity experimental data. Average velocity in the tank had a tendency to increase as the β increased. The predicted average velocities (in m/s) were 0.0175, 0.0185 and 0.0197 at β 0°, 10° and 15° respectively, at a constant rotational speed (400 rpm). Larger β produced high tangential velocity, leading to a strong circulation flow. Applications of this side-entry mixing tank include those in large scale reactors and storage tanks to maintain the homogeneity of the material inside.

    DOI: 10.14716/ijtech.v10i3.2925

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  41. HYDROTHERMAL AND SOLVOTHERMAL SYNTHESIS OF CERIUM-ZIRCONIUM OXIDES FOR CATALYST APPLICATIONS 査読有り

    Machmudah Siti, Ceaser Muhamad Risky, Alwajdy Muhammad Fareid, Widiyastuti, Winardi Sugeng, Wahyudiono, Kanda Hideki, Goto Motonobu

    INTERNATIONAL JOURNAL OF TECHNOLOGY   10 巻 ( 3 ) 頁: 582 - 592   2019年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Technology  

    Cerium oxide (CeO2) is a rare earth metal oxide that has high oxygen storage capacity at low temperature. In order to enhance this capacity, as well as its thermal stability, it is necessary to combine CeO2 with zirconium oxide (ZrO2). This work focuses on the synthesis of cerium-zirconium oxides by hydrothermal and solvothermal treatment at low temperature to obtain ones suitable for catalyst applications. The possibility of the application of ceria-zirconia oxide to the delignification reaction was investigated. The experiments were conducted at a constant pressure of 5 MPa, constant temperature of 150°C, and constant synthesis time of 2 h, in an autoclave reactor made of SUS 316 with an internal volume of 100 mL. Precursor was prepared from Ce(NO3)3 and ZrO(NO3)2 at 0.06 M concentration, dissolved in various solvents. The solvents used were water, water/ethanol (70:30 vol/vol), and water/ethylene glycol (70:30 vol/vol). After hydrothermal and solvothermal synthesis, the colloid products were dried at 60°C for 6 h and then calcined at 500°C for 6 h. The characterizations of the particle products were analyzed using SEM and XRD. Furthermore, these products were used for the hydrothermal delignification process of wood biomass. The addition of ceria-zirconia particles dramatically increased the percentage of lignin removal from rapeseed wood up to 97.58%. Based on the results, ceria-zirconia oxide particles are effective for the pre-treatment of wood biomass in bio-refinery applications. Moreover, ceria-zirconia oxides may reduce the use of chemical compounds in the delignification process.

    DOI: 10.14716/ijtech.v10i3.2930

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  42. Particle micronization of Curcuma mangga rhizomes ethanolic extract/biopolymer PVP using supercritical antisolvent process 査読有り

    Lestari Sarah Duta, Machmudah Siti, Winardi Sugeng, Wahyudiono, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   146 巻   頁: 226 - 239   2019年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    Curcuma mangga (C. mangga) rhizomes ethanolic extract/PVP micronized particles were prepared using the supercritical antisolvent (SAS) method. The ethanolic extract was obtained from dried C. mangga rhizomes using soxhletation. A mixture of acetone and ethanol (90:10 (v/v)) was used as the solvent, while supercritical CO2 was used as the antisolvent. The effect of the operating conditions on the size and morphology, and characteristic of the particles was evaluated. By using this process, nanoparticles with an average diameter ranging from 111 ± 47 nm to 210 ± 120 nm were successfully formed. The particle size decreased as the temperature increased, whereas pressure did not significantly affect the particle size or morphology. A lower concentration of the feed produced smaller particle sizes. Based on the optimization using the RSM Box-Behnken design, the best result was predicted at a pressure of 15.65 MPa, temperature of 309.7 K, C. mangga to PVP ratio of 1:13.7, and feed concentration of 3.18 mg/ml with a predicted particle size of 99 nm, which is less than the experimental results. This investigation has the potential to improve the use of C. mangga rhizomes in pharmaceutical and nutraceutical applications.

    DOI: 10.1016/j.supflu.2018.10.017

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  43. Atmospheric-pressure pulsed discharge plasma in capillary slug flow system for dye decomposition 査読有り

    Wahyudiono, Mano Kakeru, Hayashi Yui, Yamada Motoki, Takahashi Shigenori, Takada Noriharu, Kanda Hideki, Goto Motonobu

    CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION   135 巻   頁: 133 - 140   2019年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Engineering and Processing - Process Intensification  

    In this study, the introduction of non-equilibrium atmospheric-pressure plasma in a slug flow reactor system is demonstrated as a chemical reaction medium. The water containing Coomassie Brilliant Blue R − 250 (CBB) and various gas species are used as the liquid and gas phases, respectively, which are flown at 1.5 and 0.5 mL/min. The optical emission spectra indicate that different reactive oxidation species are generated by each gas when the pulsed discharge plasma is applied to the slug flow reactor system. The oxygen-base reactive species are found in abundance. The decoloration of CBB seems to occur, which is indicated by a change in the color of the aqueous solution. The UV − vis spectra show that the order of the CBB decomposition rate is oxygen > air > nitrogen > argon > helium.

    DOI: 10.1016/j.cep.2018.11.023

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  44. Synthesis of silver nanoparticles by atmospheric-pressure pulsed discharge plasma in a slug flow system 査読有り

    Yamada Motoki, Takahashi Shigenori, Wahyudiono, Takada Noriharu, Kanda Hideki, Goto Motonobu

    JAPANESE JOURNAL OF APPLIED PHYSICS   58 巻 ( 1 )   2019年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japanese Journal of Applied Physics  

    Application of nonequilibrium atmospheric-pressure plasma has been proven as a medium for silver particle formation in slug flow reactor systems. Argon gas was introduced in the slug flow reactor system in the gas phase. In the liquid phase, silver nitrate (AgNO 3 ) with and without the addition of starch was dissolved in distilled water. The flow rates of the liquid and gas phases were 1.5 and 0.15 ml min -1 , respectively. A yellow-colored solution product was obtained when the feed solution containing starch was fed. The optical emission spectrum showed that silver atoms were detected clearly at 328 nm. The ultraviolet-visible spectroscopy analysis showed that the solution products seemed to absorb light between 380 and 440 nm, corresponding to silver nanoparticle generation. Transmission electron microscopy revealed that the monodispersed silver nanoparticles were formed in a spherical morphology with diameter less than 10 nm on average.

    DOI: 10.7567/1347-4065/aaec1b

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  45. Microparticles formation of ganoderma lucidumextract by electrospraying method 査読有り

    Machmudah S., Setyorini D., Winardi S., Wahyudiono , Kanda H., Goto M.

    ASEAN Journal of Chemical Engineering   19 巻 ( 2 ) 頁: 74 - 82   2019年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ASEAN Journal of Chemical Engineering  

    In this work, Ganoderma lucidum(G. lucidum) extract was produced in microparticles form by electrospraying. G. lucidumwas extracted hydrothermally at temperature of 160oC and pressure of 7 MPa. The extract solution was subsequently mixed with 6% of Polyvinyl pyrrolidone (PVP)and formed into microparticles by electrospraying process. The electrospraying was carried out at applied voltage of 12, 14, and 16 kV, and the distance between syringe tip and electrospun collector of 8, 10, and 12 cm. The microparticles formed was analyzed usingscanning electron microscope (SEM), fourier-transform infrared (FTIR) spectroscopy, and UV-Vis spectrofotometer. The antioxidant efficiency of particles was also analyzed by 1,1-diphenyl-2-picrylhydrazyl (DPPH)assay. Based on the SEM analysis, the G. lucidumextract (GLE) –PVP spherical particles were formed by electrospraying. The finer fibres were clearly formed with the increasing applied voltage. The results showed that applied voltage and distance of tip to electrospun collector significantly influence the antioxidant efficiency and the diameter size of particles. The antioxidant efficiency increased with the rising applied voltage and gap of tip to electrospun collector, while the particle diameter decreased with the rising applied voltage and gap of tip toelectrospun collector due to fast mass transfer and evaporation. The largest antioxidant efficiency of particles was 0.377/min obtained at 16 kV and 12 cm. It indicated that electrospraying is an effective process to produce pharmaceutical compounds in powder form.

    DOI: 10.22146/ajche.52004

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  46. Electrospraying Micronization of Phytochemical Compounds Extract from Eucheuma cottonii 査読有り

    Dwi Setyorini, Siti Machmudah, Sugeng Winardi, Kusdianto Kusdianto, Wahyudiono, Hideki Kanda, Motonobu Goto

    Jurnal Teknik ITS   8 巻 ( 2 ) 頁: F68 - F73   2019年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  47. Sorption efficiency in dye removal and thermal stability of sorghum stem aerogel

    Septiani E.L., Prastuti O.P., Kurniati Y., Fauziyah M., Widiyastuti , Setyawan H., Wahyudiono , Kanda H., Goto M.

    Materials Science Forum   966 MSF 巻   頁: 175 - 180   2019年

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    記述言語:日本語   出版者・発行元:Materials Science Forum  

    Agroindustry waste containing cellulose compound, Sorghum stem, was utilized to become cellulose aerogel which was then used as dye absorbent in textile dye wastewater. Cellulose was prepared by sorghum stem powder delignification using 6%w of NaOH solution. The ratio of powder and NaOH was varied in 1:12, 1:15, and 1:20. After this process, the powder was synthesized with NaOH/Urea to produce an aerogel by the freeze-drying method. The result shows that a higher amount of NaOH in the delignification process could increase aerogel density and decrease the porosity. Thermal stability and sorption efficiency of the aerogel was analyzed in this study. Higher porosity of aerogel tends to raise % removal in methylene blue absorption. This study reveals that aerogel three times more effective than activated carbon in dye removal.

    DOI: 10.4028/www.scientific.net/MSF.966.175

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  48. Development of separation technology for valuable oil mixture of citrus juice waste 査読有り

    Sasaki Y., Wahyudiono, Hoshino Y., Yamato K., Kida T., Hoshino M., Goto M.

    ARPN Journal of Engineering and Applied Sciences   13 巻 ( 23 ) 頁: 9237 - 9243   2018年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ARPN Journal of Engineering and Applied Sciences  

    The juice processing waste of citrus fruit has high potential because it contains valuable hydrocarbons such as essential oils and triglyceride derived from peel and seed, respectively. In this work, the separation of limonene and triglycerides from the oil mixture as a model waste of citrus fruit by using supercritical carbon dioxide (SC-CO2) was performed at temperatures of 30 - 65 °C and pressures of 7 - 30 MPa. Two modes of separation apparatus were applied. At first, the mixed flow separation apparatus was used to investigate the tendency of separation behavior. The result showed that the yield of extract increased with increasing operating pressure. However, the triglyceride and limonene components could not be properly separated at each operating temperature. Next, the continuous experiment was carried out using a countercurrent separation method. It was observed that the extract and raffinate have been fractionated in a stable amount at 180 min. The result showed that the limonene content and its recovery rate were 95.04 % and 90 % at 30 °.C and 10 MPa, respectively. Furthermore by applying the temperature gradient in the fractionation column, the limonene component was concentrated more effectively.

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  49. Micronization for enhancement of curcumin dissolution via electrospraying technique 査読有り

    Chhouk K., Diono W., Kanda H., Goto M.

    ChemEngineering   2 巻 ( 4 ) 頁: 1 - 10   2018年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ChemEngineering  

    Curcumin is a hydrophobic polyphenol compound exhibiting a wide range of biological activities such as anti-inflammatory, anti-bacterial, anti-fungal, anti-carcinogenic, anti-HIV, and anti-microbial activity. Recently, electrospraying has been successfully used to produce micro-or nano-sized particles for pharmaceutical use. In this work, polyvinylpyrrolidone (PVP) microspheres containing curcumin were prepared via electrospraying in order to improve the bioavailability of poorly-water-soluble curcumin. The influence of five processing parameters namely curcumin/PVP ratio, tip to collector distance, and electric voltage on physic-chemical properties was investigated. The characterization and aqueous solubility of particles were determined by using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and UV-Vis spectrophotometer. The result indicated that the spherical particles with particle size distribution of 164 to 730 nm obtained at a curcumin/PVP ratio of 1:30, a polymer solution concentration of 0.4%, electric voltage of 10 kV, and a tip-to-collector distance of 15 cm. Moreover, the dissolution of curcumin/PVP particle generated by electrospraying was higher than that of the original curcumin and pure curcumin particles produced by electrospraying.

    DOI: 10.3390/chemengineering2040060

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  50. Enhanced Solubility and Reduced Crystallinity of Carotenoids, beta-Carotene and Astaxanthin, by Z-Isomerization 査読有り

    Honda Masaki, Kodama Tomohiko, Kageyama Hakuto, Hibino Takashi, Wahyudiono, Kanda Hideki, Goto Motonobu

    EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY   120 巻 ( 11 )   2018年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Journal of Lipid Science and Technology  

    The impact of the Z-isomer content of carotenoids, β-carotene and astaxanthin, on their solubility in organic solvents and crystallinity is investigated. Carotenoid samples containing different Z-isomer contents are prepared from the high-purity all-E-isomers by the thermal isomerization and filtering technique: β-carotene, 27.4% and 89.8% Z-isomer content; astaxanthin, 34.5% and 63.2% Z-isomer content. As the Z-isomer content of the carotenoids increases, their relative solubility markedly improves, e.g., the solubility in ethanol of β-carotene containing 89.8% Z-isomer is ≈250 times higher than that of the all-E-isomer. Moreover, differential scanning calorimetry (DSC), powder X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses clearly indicate that the (all-E)-carotenoids are present in the crystal state, while the Z-isomers are present in an amorphous state. A number of studies have reported that the Z-isomerization of carotenoids induced changes in bioavailability and antioxidant activity. This may be due to the change in physicochemical properties such as solubility and crystallinity by Z-isomerization. In addition, these changes are important information for improving carotenoid processing. Practical Applications: Carotenoids in plants occur predominantly in the all-E-configuration, whereas the Z-isomers are present in the human body in considerable quantity. Since (all-E)-carotenoids have low solubility in solvents and high crystallinity, efficiencies of those processing such as solvent extraction, micronization, and emulsification are low. However, this study experimentally reveals that solubilities of carotenoids, β-carotene and astaxanthin, are significantly improved and crystallinities of them are reduced by Z-isomerization. These fundamental data should contribute to improvement of carotenoids processing efficiency. The effect of the Z-isomer content of carotenoids, β-carotene and astaxanthin, on their solubility in organic solvents and crystallinity is investigated. Increasing the Z-isomer contents of the carotenoids, those solubility improved and those crystallinity reduced.

    DOI: 10.1002/ejlt.201800191

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  51. Consideration Of Au-Carbon nanoparticles by laser ablation under supercritical CO<inf>2</inf> 査読有り

    Mardis M., Wahyudiono , Takada N., Kanda H., Goto M.

    ARPN Journal of Engineering and Applied Sciences   13 巻 ( 20 ) 頁: 8343 - 8347   2018年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ARPN Journal of Engineering and Applied Sciences  

    In our previous works, we observed the formation of Au-carbon nanoparticles via pulsed laser ablation (PLA) under pressurized CO2. We showed that the size of the generated nanoparticles depend strongly on the pressure and the temperature of the CO2 medium. Here, we further elaborate this finding by applying more extreme conditions for the CO2 medium. The experiments were performed at temperatures and pressures of 31-80 °C and 5-15 MPa, corresponding to the supercritical phase of CO2. We observed that the generated Au-carbon nanoparticles has the average size of 11 nm with spherical and nanocluster structures. The effects of the medium temperature and pressure will be discussed thoroughly.

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  52. Supercritical Fluids Extraction of Valuable Compounds from Algae: Future Perspectives and Challenges 査読有り

    Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    ENGINEERING JOURNAL-THAILAND   22 巻 ( 5 ) 頁: 13 - 30   2018年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering Journal  

    Algae (macro and micro) can be used to produce several high–value metabolites to supply industries as cosmetics, additives and pigments, among others. Those metabolites can have physiological and nutritional benefits for human and animal health. However, the availability of high–value metabolites from algae is still unaffordable due to traditional extraction techniques and their requirements of energy and use of pollutant solvents. Recently, green extraction technologies for the extraction of high–value metabolites have become more desirable due to their sustainability and environmental benefits. Supercritical fluids extraction, as green extraction techniques, has been widely applied for extraction of high–value metabolites from algae. Here, the highlight of supercritical CO2 and subcritical water on the extraction of bioactive compounds from macro– and microalgae was presented. The perspective and challenge for using supercritical CO2 and subcritical water on the algae extraction were also concluded.

    DOI: 10.4186/ej.2018.22.5.13

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  53. Lipids from Vitellaria paradoxa Gaertn Seeds by Supercritical CO2: Extraction and Optimization of Parameters by Response Surface Methodology 査読有り

    Yamamoto Naomasa, Murakami Kazuya, Kimthet Chhouk, Wahyudiono, Onwona-Agyeman Siaw, Kanda Hideki, Goto Motonobu

    ENGINEERING JOURNAL-THAILAND   22 巻 ( 5 ) 頁: 31 - 44   2018年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering Journal  

    Supercritical carbon dioxide (CO2) was employed to extract lipids from Vitellaria paradoxa Gaertn seeds in semi–batch process at various operating conditions to optimize extraction process. The extraction processes were carried out at 40 – 60oC and 20 – 40 MPa with 2 – 4 ml min–1 CO2 flow rates. Analysis of variance (ANOVA) with 33 factorial design combined with statistical was used to optimize variables in the process of Vitellaria paradoxa Gaertn seeds lipids extraction with supercritical CO2. The FT–IR spectra indicated that the Vitellaria paradoxa Gaertn seeds components were extracted by supercritical CO2. The SEM images also indicated that the physical changes in the surface of the Vitellaria paradoxa Gaertn seeds occurred after supercritical CO2 extraction treatment. The maximum of extracted lipids was 0.47 g/g–sample when the extraction was conducted at a temperature of 80oC and pressure of 40 MPa with CO2 flow rate of 3 ml min–1. The GC–MS analysis showed that the extracted lipids mainly composed of palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), and linoleic acid (C18:2). The analysis of experimental design demonstrated that pressure and temperature were the influential variables on the lipids extraction.

    DOI: 10.4186/ej.2018.22.5.31

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  54. Production of beta-carotene nanosuspensions using supercritical CO2 and improvement of its efficiency by Z-isomerization pre-treatment 査読有り

    Ono Maiko, Honda Masaki, Wahyudiono, Yasuda Keiji, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   138 巻   頁: 124 - 131   2018年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    The effects of Z-isomer content of β-carotene on the dispersion efficiency by ultrasound treatment using supercritical CO2 (SC-CO2) as an organic phase and the characteristics and storage stability of the obtained suspensions were investigated. β-Carotene containing a large amount of Z-isomer (79.1% of total β-carotene) was prepared by a thermal Z-isomerization and filtering technique from (all-E)-β-carotene. When Z-isomer-rich β-carotene was used as the raw material, the encapsulated β-carotene content was remarkably increased compared to when using (all-E)-β-carotene, e.g., the encapsulated β-carotene content was 21.2 times higher after the 60-min ultrasound treatment at 45 kHz. Furthermore, the Z-isomerization pre-treatment resulted in a reduction of particle size in the suspensions. The mean particle size when (all-E)-β-carotene was used was approximately 700 nm and that when the Z-isomers were used was approximately 100 nm. On the other hand, the suspension obtained from Z-isomer-rich β-carotene had lower storage stability than the all-E-isomer.

    DOI: 10.1016/j.supflu.2018.04.006

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  55. Microwave-Accelerated Z-Isomerization of (all-E)-Lycopene in Tomato Oleoresin and Enhancement of the Conversion by Vegetable Oils Containing Disulfide Compounds 査読有り

    Honda Masaki, Sato Haruka, Takehara Munenori, Inoue Yoshinori, Kitamura Chitoshi, Takemura Ryota, Fukaya Tetsuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY   120 巻 ( 7 )   2018年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Journal of Lipid Science and Technology  

    The effect of microwave irradiation on Z-isomerization of (all-E)-lycopene contained in tomato oleoresin is investigated, and the Z-isomerization efficiency is compared to that of the conventional oil-bath heating method. With a 4-min microwave treatment at 2450 MHz frequency and 500 W power, the total Z-isomer content of lycopene increased to approximately 70%, almost without decomposition, and the efficiency, at the same temperature, is higher than that with conventional heating. In both treatments, the (9Z)- and (13Z)-isomers are mainly formed. Moreover, the effect of addition of vegetable oils to the oleoresin on the Z-isomerization by microwave irradiation is examined. When roasted seed oils and garlic oil are added, the production of (5Z)-lycopene, an isomer having higher functionality and storage stability among the Z-isomers, is significantly increased. This work reveals that the promoting effect is probably caused by the presence of disulfide compounds existing commonly in the above oils: Thiyl radicals, produced from disulfide compounds by microwave irradiation, would act as a catalyst for the Z-isomerization reaction. Practical Applications: Z-Isomers of lycopene, which are the predominant forms in the human body, have higher bioavailability and antioxidant capacity than the all-E-isomer, which is the major configuration form in raw tomatoes. Thus, appropriate methods are required to achieve the efficient Z-isomerization of (all-E)-lycopene. This study has developed an efficient production method for lycopene Z-isomers by microwave irradiation of (all-E)-lycopene in edible vegetable oils containing disulfide compounds, in which neither organic solvents nor food additives are used. It would be practically feasible to utilize this procedure not only for food, drink, and dietary supplement manufacturing, but also for daily cooking. (all-E)-Lycopene in tomato oleoresin is efficiently isomerized to the Z-isomers by microwave irradiation and the Z-isomerization is accelerated by adding vegetable oils containing disulfide compounds.

    DOI: 10.1002/ejlt.201800060

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  56. Effect of thermal treatment and light irradiation on the stability of lycopene with high Z-isomers content 査読有り

    Murakami Kazuya, Honda Masaki, Takemura Ryota, Fukaya Tetsuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    FOOD CHEMISTRY   250 巻   頁: 253 - 258   2018年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Food Chemistry  

    The stability of lycopene with high Z-isomers content during thermal treatment and light irradiation was investigated. Purified (all-E)-lycopene was thermally isomerized to the Z-isomers in dichloromethane (CH2Cl2) at 50 °C for 24 h. The total content of the Z-isomers of lycopene reached 56.1%. Then, the mixture of lycopene isomers was stored in the dark at 4, 25, and 40 °C for 30 days, and under light irradiation using a fluorescent light at 4 °C for 336 h. The degradation rate of lycopene during thermal treatment rose with increasing temperature and the activation energy for decomposition of the mixture of lycopene isomers was calculated to be 71.0 kJ mol−1. The degradation rate of lycopene isomers was almost the same under thermal treatment. On the other hand, during light irradiation, isomerization was promoted rather than decomposition, i.e. (9Z)- and (13Z)-lycopene converted to the (all-E)-isomer.

    DOI: 10.1016/j.foodchem.2018.01.062

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  57. Nanoparticle formation of PVP/astaxanthin inclusion complex by solution enhanced dispersion by supercritical fluids (SEDS): Effect of PVP and astaxanthin Z-isomer content 査読有り

    Kaga Kahori, Honda Masaki, Adachi Tomoki, Honjo Masatoshi, Wahyudiono, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   136 巻   頁: 44 - 51   2018年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    The effects of operating conditions and Z-isomer content of astaxanthin on coprecipitate formation of polyvinylpyrrolidone (PVP) and astaxanthin by solution-enhanced dispersion by supercritical fluids (SEDS) process were investigated. Using this process, nano-sized (100–200 nm) and water-soluble PVP/astaxanthin inclusion complex was successfully prepared. As the operating pressure increased from 8 to 15 MPa at a constant temperature, astaxanthin content in the coprecipitates decreased, and increasing the operating temperature from 40 to 60 °C at a constant pressure, the particle size and the astaxanthin content increased. Increasing the PVP ratio for astaxanthin in the range of 5:1 to 20:1, the particle size decreased and when 10:1 of the ratio, the astaxanthin content in the coprecipitates was the highest (60 °C, 10 MPa). Additionally, as the Z-isomer content of astaxanthin increased, the astaxanthin content decreased slightly. However, the coprecipitates rich in astaxanthin Z-isomers, which have higher bioavailability and antioxidant capacity, were obtained.

    DOI: 10.1016/j.supflu.2018.02.008

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  58. Glycine oligomerization by pulsed discharge plasma over aqueous solution under atmospheric pressure

    Hayashi Y., Diono W., Takada N., Kanda H., Goto M.

    ChemEngineering   2 巻 ( 2 ) 頁: 1 - 11   2018年6月

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    記述言語:日本語   出版者・発行元:ChemEngineering  

    Chemical reactions of amino acids induced by discharge plasma are important for understanding the mechanism of biological effects of discharge plasma in biomedical applications. In this study, we generated a nano-second pulsed discharge plasma under atmospheric pressure over an aqueous solution containing glycine. The reaction products after the pulsed discharge plasma treatments were analyzed by high-performance liquid chromatography and matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy. The oligomerization reaction of glycine was induced in aqueous solution and produced glycine oligomers at the beginning of the discharge plasma. However, the glycine oligomers were decomposed into products with low molecular weight by excessive pulsed discharge plasma. According to comparative experiments, physical force of the plasma is believed to induce the glycine reaction. Moreover, the reactions depended on the pH, but not the conductivity, of the glycine solution. Glycine in aqueous solution was reacted by the discharge plasma only at neutral pH because the reaction proceeded only when glycine ions were in the zwitterionic state. Anions and cations of glycine reacted very little under the discharge plasma.

    DOI: 10.3390/chemengineering2020017

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  59. Crystallization of All trans-beta-carotene by Supercritical Carbon Dioxide Antisolvent via Co-axial Nozzle 査読有り

    Kodama Tomohiko, Honda Masaki, Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    ENGINEERING JOURNAL-THAILAND   22 巻 ( 3 ) 頁: 25 - 38   2018年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering Journal  

    The crystallization of β-carotene through supercritical antisolvent process with carbon dioxide (CO2) as an antisolvent has been demonstrated. The experiments were conducted at temperatures of 40 - 60o C and pressures of 10 - 14 MPa at a constant CO2 flow rate. As a starting material, β-carotene powder was dissolved in dichloromethane (DCM). Results of UV-vis spectrophotometry and GC-MS analysis showed that there was no remaining DCM solvent in the β-carotene particles products. It showed that CO2 has successfully removed DCM from β-carotene particles products. The product characterization by using fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) showed that the CO2 solvent did not impregnate to the β-carotene particles products. Results from scanning electron microscope (SEM) images showed that the β-carotene particles products were successfully prepared in plate-like shape morphologies with size around 1 μm.

    DOI: 10.4186/ej.2018.22.3.25

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  60. Efficacy of supercritical carbon dioxide integrated hydrothermal extraction of Khmer medicinal plants with potential pharmaceutical activity 査読有り

    Chhouk Kimthet, Wahyudiono, Kanda Hideki, Goto Motonobu

    JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING   6 巻 ( 2 ) 頁: 2944 - 2956   2018年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Environmental Chemical Engineering  

    Khmer medicinal plants have been employed to treat human diseases for nearly a thousand years. Several studies have shown that the principal phytochemical constituents of such medicinal plants are phenolic acids, flavonoids, tannins, and alkaloids, which possess diverse bioactivities such as antioxidant, anti-inflammatory, anticancer, antidiabetic, antiallergic, and antimicrobial. In the present study, the extraction of the phytochemical constituents of Khmer medicinal plants (Dialium cochinchinense Pierre, Cinnamomum cambodianum Lecomte, Gardenia angkorensis Pitard, Cananga latifolia (Hook.f. & Thomson) Finet & Gagnep, and Oroxylum indicum (L.) Kurz bark) is performed using a supercritical carbon dioxide integrated hydrothermal process (SC-CO2-H) at a temperature of 150°C, pressure of 10MPa, water flow rate of 2mL/min, CO2 flow rate of 0.15mL/min, and extraction time of 4h. The total phenolic compounds content and antioxidant activity of the Khmer medicinal plants were determined by using the Folin-Ciocalteu and DPPH scavenging activity methods, respectively. The phytochemical constituents of such plants were identified using GC-MS analysis. The results showed that the extracts obtained by SC-CO2-H contained a high amount of total phenolic compounds with potential antioxidant activity. The GC-MS results also suggested that the Khmer medicinal plants contained many bioactive compounds with a broad range of biological activities, which could be employed in the food, pharmaceutical, and cosmetic industries.

    DOI: 10.1016/j.jece.2018.04.036

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  61. Electrospinning of poly(vinyl pyrrolidone) fibers containing metal oxide nanoparticles under dense CO2 査読有り

    Ozawa Hiroyuki, Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    RESEARCH ON CHEMICAL INTERMEDIATES   44 巻 ( 4 ) 頁: 2215 - 2230   2018年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Research on Chemical Intermediates  

    Electrospinning is an electrostatic process for formation of polymer fibers with nano/microscale diameter from solution. In this study, poly(vinyl pyrrolidone) (PVP) dissolved at 4 wt% concentration in dichloromethane (DCM) containing titanium oxide (TiO2) nanoparticles was used as polymer feed solution for electrospinning under pressurized carbon dioxide (CO2) at temperature of 30 °C, pressure of 5 MPa, and applied voltage of 10–14 kV. Scanning electron microscopy (SEM) revealed that the PVP fibers electrospun with and without TiO2 nanoparticles exhibited the same morphology with hollow structure and average pore diameter of 2–7 μm. Fourier-transform infrared (FT-IR) spectroscopy revealed that the electrospun PVP fibers had properties similar to the PVP starting material. X-ray photoelectron spectroscopy (XPS) revealed that the TiO2 nanoparticles were present in the residue after thermogravimetric (TG) analysis of electrospun fibers. Graphical Abstract: SEM images of PVP with 25-nm TiO2 nanoparticles, electrospun at 5 MPa and various applied voltages, exhibiting hollow fiber morphology[Figure not available: see fulltext.].

    DOI: 10.1007/s11164-017-3224-9

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  62. Extraction of Phytochemical Compounds from Eucheuma cottonii and Gracilaria sp using Supercritical CO<inf>2</inf> Followed by Subcritical Water

    Setyorini D., Aanisah R., Machmudah S., Winardi S., Wahyudiono, Kanda H., Goto M.

    MATEC Web of Conferences   156 巻   2018年3月

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    記述言語:日本語   出版者・発行元:MATEC Web of Conferences  

    Extraction of phytochemical compounds (such as β-carotene, linoleic acids, carrageenan, and polyphenols) from algae Eucheuma cottonii and Gracilaria sp with supercritical CO2 followed by subcritical water has been investigated. Supercritical CO2 extraction was carried out at pressure of 25 MPa, temperature of 60°C, CO2 flowrate of 15 ml/min, and ethanol flowrate of 0.25 ml/min. To determine the content of carotenoids and linoleic acids, the extracted compounds were analyzed using a spectrophotometer UV-Vis. The residue of algae starting material was subsequently extracted by subcritical water at pressures of 3, 5, and 7 MPa, and temperatures of 120, 140, 160, and 180 °C. Carrageenan extracted by subcritical water was analyzed using Fourier Transform Infra Red (FTIR), while the total phenolic compound was analyzed with UV-vis spectrophotometer. Moreover, the antioxidant efficiency of extract was also examined by DPPH assay method. Based on the analytical result, β-carotene and linoleic acid content in Eucheuma cottonii were 209.91 and 321.025 μg/g sample, respectively. While β-carotene and linoleic acid content in Gracilaria sp were 219.99 and 286.52 μg/g sample, respectively. The optimum condition of subcritical water extraction was at 180°C and 7 MPa. At this condition, the highest TPC content in the extract from Eucheuma cottonii and Gracilaria sp were 18.51 mg GAE/g sample and 22.47 mg GAE/g sample, respectively; while the highest yield of carrageenan extracted from Eucheuma cottonii and Gracilaria sp were 61.33 and 65.54 g/100 g dried algae, respectively. At the same condition, the antioxidant efficiency was 0.513 min-1 for Eucheuma cottonii and 0,277 min-1 for Gracilaria sp. Based on the results the extraction method effectively separated non-polar and polar compounds, then increased the antioxidant efficiency of extract.

    DOI: 10.1051/matecconf/201815603051

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  63. Synthesis of Ceria Zirconia Oxides using Solvothermal Treatment

    Machmudah S., Widiyastuti, Winardi S., Wahyudiono, Kanda H., Goto M.

    MATEC Web of Conferences   156 巻   2018年3月

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    記述言語:日本語   出版者・発行元:MATEC Web of Conferences  

    Ceria oxide (CeO2) is widely used as catalyst with high oxygen storage capacity at low temperature. The addition of zirconia oxide (ZrO2) to CeO2 can enhance oxygen storage capacity as well as thermal stability. In this work, ceria zirconia oxides has been synthesized via a low temperature solvothermal treatment in order to produce ceria zirconia oxides composite with high oxygen storage capacity as electrolyte of solid oxide fuel cells (SOFC). Under solvothermal conditions, solvent may control the direction of crystal growth, morphology, particle size and size distribution, because of the controllability of thermodynamics and transport properties by pressure and temperature. Water, mixed of water and ethanol (70/30 vol/vol), and mixed of water and ethylene glycol (70/30 vol/vol) were used as solvent, while Ce(NO3)3 and ZrO(NO3)2 with 0.06 M concentration were used as precursor. The experiments were conducted at temperature of 150 °C and pressure for 2 h in a Teflon-lined autoclave of 100 mL volume. The synthesized products were dried at 60 °C for 6 and 12 h and then calcined at 900 °C for 6 h. The particle products were characterized using SEM, XRD, TG/DTA, and Potentiostat. The results showed that the morphology of particles formed were affected by the solvent. Solid plate shaped particles were produced in water, and tend to be pore with the addition of ethylene glycol. The addition of ethanol decreased the size of particles with sphere shaped. The XRD pattern indicated that ceria-zirconia oxides particles are uniformly distributed in the structure to form a homogeneous solid solution. Based on the electrochemical analysis, ceria zirconia oxides produced via solvothermal synthesis had high conductivity ion of 0.5594 S/cm, which is higher than minimum conductivity ion requirement of 0.01 S/cm for SOFC electrolyte. It indicated that ceria zirconia oxides produced via solvothermal synthesis is suitable for SOFC electrolyte.

    DOI: 10.1051/matecconf/201815605014

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  64. Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl mixer 査読有り

    Chhouk Kimthet, Wahyudiono, Kanda Hideki, Kawasaki Shin-Ichro, Goto Motonobu

    FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING   12 巻 ( 1 ) 頁: 184 - 193   2018年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Frontiers of Chemical Science and Engineering  

    Curcumin is a hydrophobic polyphenol compound exhibiting a wide range of biological activities such as anti-inflammatory, anti-bacterial, anti-fungal, anti-carcinogenic, anti-human immunodeficiency virus, and antimicrobial activity. In this work, a swirl mixer was employed to produce the micronized curcumin with polyvinylpyrrolidone (PVP) by the supercritical anti-solvent process to improve the bioavailability of curcumin. The effects of operating parameters such as curcumin/PVP ratio, feed concentration, temperature, pressure, and CO2 flow rate were investigated. The characterization and solubility of particles were determined by using scanning electron microscopy, Fourier Transform Infrared spectroscopy, and ultra-violet-visible spectroscopy. The result shows that the optimal condition for the production of curcumin/PVP particles is at curcumin/PVP ratio of 1:30, feed concentration of 5 mg·mL−1, temperature of 40 °C, pressure of 15 MPa, and CO2 flow rate of 15 mL·min−1. Moreover, the dissolution of curcumin/PVP particles is faster than that of raw curcumin.

    DOI: 10.1007/s11705-017-1678-3

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  65. Effect of the Z-isomer content on nanoparticle production of lycopene using solution-enhanced dispersion by supercritical fluids (SEDS) 査読有り

    Kodama Tomohiko, Honda Masaki, Takemura Ryota, Fukaya Tetsuya, Uemori Chiho, Wahyudiono, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   133 巻   頁: 291 - 296   2018年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    The effect of the Z-isomer content on particle production of lycopene by the solution-enhanced dispersion by supercritical fluids (SEDS) process was evaluated. Using the thermal isomerization and filtering technique, lycopene containing a large amount of Z-isomers (65.3% and 97.8%) was prepared from (all-E)-lycopene. When (all-E)-lycopene was used as a raw material for SEDS precipitation, particles with an average size of 3.6 μm were obtained. On the other hand, when using lycopene containing a large amount of the Z-isomers, the lycopene particles became significantly finer compared with those obtained using (all-E)-lycopene. For example, when using lycopene containing 97.8% Z-isomers, uniformly sized particles with an average size of 75 nm were obtained. Interestingly, despite the Z-isomer content of the raw materials, the obtained lycopene particles were primarily in the thermodynamically stable all-E-isomer. Therefore, the Z-isomerization pre-treatment of lycopene is very effective to obtain uniform, stable, and fine particles using SEDS precipitation.

    DOI: 10.1016/j.supflu.2017.10.028

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  66. Subcritical water extraction enhancement by adding deep eutectic solvent for extracting xanthone from mangosteen pericarps 査読有り

    Machmudah Siti, Lestari Sarah Duta, Widiyastuti, Wahyudiono, Kanda Hideki, Winardi Sugeng, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   133 巻   頁: 615 - 624   2018年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    Enhanced extraction of phenolic compounds from pericarps of mangosteen by subcritical water treatment was performed at various temperatures and pressures of 120–160 °C and 1–10 MPa in batch and semi–batch systems. Instead of water, the deionized water which contains deep eutectic solvent at 10–30% volume was used as an extraction media. With 30% of deep eutectic solvent addition, the yields of xanthone and phenolic compounds content were 24.87 mg/g dried sample and 179.54 mg of gallic acid equivalent (GAE)/g dried sample at extraction temperatures of 160 and 120 °C in batch system, respectively. They could achieve to 27.15 mg/g dried sample and 372.69 mg of GAE/g dried sample when the extraction were performed in semi–batch system at temperature of 160 °C and pressures of 5 and 10 MPa with 10 and 30% of deep eutectic solvent addition, respectively.

    DOI: 10.1016/j.supflu.2017.06.012

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  67. Crystallization of acetaminophen in nano/micro scale using swirl mixing micro device under pressurized carbon dioxide

    Uemori C., Kodama T., Machmudah S., Wahyudiono, Kanda H., Goto M.

    ARPN Journal of Engineering and Applied Sciences   13 巻 ( 4 ) 頁: 1340 - 1349   2018年2月

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    記述言語:日本語   出版者・発行元:ARPN Journal of Engineering and Applied Sciences  

    The fabrication of acetaminophen particles via supercritical antisolvent process with CO2 as an antisolvent was studied. The experiments were conducted at temperatures of 35-50 °C and pressures of 8-15 MPa with 5-15 ml/min CO2 flow rates. As a starting material, acetaminophen powder was dissolved in dimethyl formamide (DMF). Results of UV-vis spectrophotometry and GC-MS (gas chromatography mass spectrometry) analysis showed that there was no remaining DMF solvent in the acetaminophen particles products. It indicated that CO2 has successfully removed DMF from acetaminophen particles products. The surface characterization by using fourier transform infrared spectroscopy (FT-IR) showed that the CO2 solvent did not impregnate to the acetaminophen particles products. Results from scanning electron microscope (SEM) images showed that the acetaminophen particles products were successfully prepared in non-spherical shape morphologies with size less than 1 μm. Based on the result; this process seems a powerful method to modify the acetaminophen powder physically such as particle size reduction.

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  68. Enhanced Lycopene Extraction from Gac (Momordica cochinchinensis Spreng.) by the Z-Isomerization Induced with Microwave Irradiation Pre-Treatment 査読有り

    Honda Masaki, Watanabe Yo, Murakami Kazuya, Nguyen Ngoc Hoang, Wahyudiono, Kanda Hideki, Goto Motonobu

    EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY   120 巻 ( 2 )   2018年2月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/ejlt.201700293

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  69. Formation of Au-carbon nanoparticles by laser ablation under pressurized CO2 査読有り

    Mardis Mardiansyah, Wahyudiono, Takada Noriharu, Kanda Hideki, Goto Motonobu

    ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING   13 巻 ( 2 )   2018年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Asia-Pacific Journal of Chemical Engineering  

    Pulsed laser ablation is known to be a promising method for synthesizing metal nanoparticles. Here, Au–carbon nanoparticles were synthesized by pulsed laser ablation under pressurized carbon dioxide. Au plate was ablated using a Nd:YAG laser with a wavelength of 532 nm and energy of 0.83 mJ in a high-pressure chamber. The experiments were performed at temperatures and pressures of 21–25 °C and 7–15 MPa, corresponding to carbon dioxide densities of 0.75–0.89 g/cm3, respectively. The synthesized products were collected on a silicon wafer and analyzed using field emission scanning electron microscopy, transmission electron microscopy, and a scanning transmission electron microscopy system equipped with energy-dispersive X-ray spectroscopy. The results showed that the generated metal nanoparticles exhibited spherical and nanocluster structures. Au, C, and O were clearly found on the nanoparticle products.

    DOI: 10.1002/apj.2176

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  70. Rapid and Selective Concentration of Lycopene Z-isomers from Tomato Pulp by Supercritical CO2 with Co-solvents 査読有り

    Watanabe Yo, Honda Masaki, Higashiura Takuma, Fukaya Tetsuya, Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN   25 巻 ( 1 ) 頁: 47 - 57   2018年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Solvent Extraction Research and Development  

    This study aimed to efficiently separate and concentrate lycopene Z-isomers from tomato pulp using supercritical CO2 (SC-CO2). The separation relies on the different solubility of (all-E)-lycopene and the Zisomers. Total lycopene recovery using SC-CO2 at 50 °C and 30 MPa for 1 h was extremely low (1.2%). Thus, before the separation test, an optimal co-solvent was selected from water, organic chemicals, and edible vegetable oils; hazelnut oil, which had the highest lycopene recovery (21.6%), was adopted. When using hazelnut oil as a co-solvent, the extraction of lycopene Z-isomers was completed in a short time compared to (all-E)-lycopene. Furthermore, when the extraction was conducted at higher pressure (50 MPa) and temperature (80 °C), the Z-isomer content decreased due to the improvement of (all-E)-lycopene solubility. Thus, to selectively and efficiently extract lycopene Z-isomers, addition of a co-solvent, and a relatively short contact time, low pressure, and low temperature extraction were important.

    DOI: 10.15261/serdj.25.47

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  71. Thermal isomerization pre-treatment to improve lycopene extraction from tomato pulp 査読有り

    Honda Masaki, Watanabe Yo, Murakami Kazuya, Takemura Ryota, Fukaya Tetsuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    LWT-FOOD SCIENCE AND TECHNOLOGY   86 巻   頁: 69 - 75   2017年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:LWT - Food Science and Technology  

    The effect of thermal Z-isomerization pre-treatment on lycopene extraction from dried tomato pulp by organic solvents and supercritical carbon dioxide (SC-CO2) was evaluated. Although total Z-isomer content of lycopene in fresh tomato pulp was only 6.1%, it increased by thermal treatment at 120 and 150 °C for 1 h to 10.0% and 56.2%, respectively. Furthermore, by adding 1 g/100 g of olive oil to the pulp, the thermal Z-isomerization efficiencies of lycopene at 120 and 150 °C for 1 h improved significantly such that the total Z-isomer contents were 30.4% and 75.7%. After freeze-drying of the thermal treated tomato pulp, lycopene was extracted by ethanol, ethyl acetate, and SC-CO2. When any solvents were used for the extraction, lycopene recovery increased according to the Z-isomer content of dried tomato pulp, e.g. in the case that ethanol extraction was conducted from the pulp containing 6.1%, 30.4%, and 75.7% Z-isomer content of lycopene, lycopene recoveries were 4.3%, 28.1%, and 75.9%, respectively. These results strongly indicated that Z-isomers of lycopene are more soluble in solvents than the all-E-isomer.

    DOI: 10.1016/j.lwt.2017.07.046

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  72. The thermal Z-isomerization-induced change in solubility and physical properties of (all-E)-lycopene 査読有り

    Murakami Kazuya, Honda Masaki, Takemura Ryota, Fukaya Tetsuya, Kubota Mitsuhiro, Wahyudiono, Kanda Hideki, Goto Motonobu

    BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS   491 巻 ( 2 ) 頁: 317 - 322   2017年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Biochemical and Biophysical Research Communications  

    The effect of Z-isomerization of (all-E)-lycopene on its solubility in organic solvents and physical properties was investigated. Lycopene samples containing different Z-isomer contents (23.8%, 46.9%, and 75.6% of total lycopene) were prepared from high-purity (all-E)-lycopene by thermal Z-isomerization in dichloromethane (CH2Cl2). As the Z-isomer content increased, the relative solubility of lycopene significantly improved. Although (all-E)-lycopene barely dissolved in ethanol (0.6 mg/L), the solubilities of lycopene containing 23.8%, 46.9%, and 75.6% Z-isomers were 484.5, 914.7, and 2401.7 mg/L, respectively. Furthermore, differential scanning calorimetry (DSC), powder X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses clearly indicated that (all-E)-lycopene was present in the crystal state, while Z-isomers of lycopene were present in amorphous states. A number of studies have suggested that Z-isomers of lycopene are better absorbed in the human body than the all-E-isomer. This may be due to the change in solubility and physical properties of lycopene by the Z-isomerization.

    DOI: 10.1016/j.bbrc.2017.07.103

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  73. Comparison of Conventional and Ultrasound Assisted Supercritical Carbon Dioxide Extraction of Curcumin from Turmeric (Curcuma longa L.) 査読有り

    Chhouk Kimthet, Wahyudiono, Kanda Hideki, Goto Motonobu

    ENGINEERING JOURNAL-THAILAND   21 巻 ( 5 ) 頁: 53 - 65   2017年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering Journal  

    Recently, ultrasound assisted supercritical fluid is used for extraction the valuable compounds from a number of plant materials as an alternative to conventional method because it can enhance the extraction rate and yield. Curcumin is an important component of turmeric (Curcuma longa L.) with many useful functions to human health. The objective of this study is using ultrasonic assisted supercritical carbon dioxide (USC-CO2) to extract curcumin from turmeric and compared to conventional method. The effect of operating conditions on extraction, including temperature (40-60 °C), pressure (15-25 MPa), extraction time (30-120 min), CO2 flow rate (2-4 mL/min) and percentage of cosolvent (10-20% v/v) were also studied. The result shows that the high extraction yield of 7.17% w/w and curcumin content of 1.69% w/w were achieved at temperature of 50 °C, pressure of 25 MPa, extraction time of 90 min, CO2 flow rate of 3 mL/min with 10% cosolvent. Compared to conventional method, USC-CO2 could provide higher curcumin content in extraction yield in a shorter extraction time. Scanning electron microscopy (SEM), thermal gravity (TG), and fourier transform infrared spectroscopy (FTIR) was used to analyse turmeric undergoing USC-CO2 and conventional extraction and showed that ultrasound could break down the cell walls and remove some functional groups from plant materials, resulting an increase the selectivity of compounds in extraction yield.

    DOI: 10.4186/ej.2017.21.5.53

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  74. The E/Z isomer ratio of lycopene in foods and effect of heating with edible oils and fats on isomerization of (all-E)-lycopene 査読有り

    Honda Masaki, Murakami Kazuya, Watanabe Yo, Higashiura Takuma, Fukaya Tetsuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY   119 巻 ( 8 )   2017年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Journal of Lipid Science and Technology  

    Since Z-isomers of lycopene are more bioavailable and show a higher antioxidant capacity than the (all-E)-isomer, it is important to investigate foods containing high amount of the Z-isomer and develop practically feasible method for Z-isomerization of (all-E)-lycopene. First, we investigated the E/Z isomer ratio of lycopene in raw and commercially available processed tomato products using an improved normal-phase HPLC method. The tomato products contained 4.6–33.4% of Z-isomers to the total lycopene, (5Z)-lycopene being the most abundant Z-isomer. The oil-containing products like tomato sauce and tomato soup suffered heat processing contained a higher percentage of Z-isomers of lycopene (27.4–33.4%). Subsequently, the impact of the amount and types of oils added on thermal Z-isomerization of (all-E)-lycopene contained in tomato puree was investigated. Increased addition of olive oil to tomato puree increased the production of lycopene Z-isomers upon heating at 120°C. (all-E)-Lycopene contained in tomato puree was converted to Z-isomers in the range of 39.2–50.7%, when 5% of vegetable oil (linseed, soybean, corn, sesame, rapeseed, rice bran, safflower seed, olive, sunflower seed, or coconut oils) or animal fat (beef tallow and pork lard) was added before heating at 120°C for 30 min. When sesame oil was employed, the total Z-isomerization ratio and (5Z)-lycopene content were significantly increased. Practical applications: The dietary intake of lycopene offers many health benefits such as decreased risk of cancer and arteriosclerosis. Lycopene has a large number of geometric isomers caused by E/Z isomerization at arbitrary sites within the eleven conjugated double bonds, and the functionalities such as antioxidant capacity and bioavailability of the Z-isomers are higher than those of the all-E-isomer. This study clarified the foods richly containing Z-isomers of lycopene and demonstrated thermal Z-isomerization of (all-E)-lycopene contained in tomato puree with edible oils and fats. These findings will contribute to effective intake of lycopene and the development of facile isomerization of (all-E)-lycopene to Z-isomers in the fields of food, drink, and dietary supplement manufacturing, as well as for daily cooking at home. The Z-isomers of lycopene contents in processed tomato products and thermal isomerization of (all-E)-lycopene to the Z-isomers with edible oils and fats were investigated. The tomato products cooked with oils contained higher levels of the Z-isomers, and sesame oil had excellent promoting effect of thermal Z-isomerization of (all-E)-lycopene.

    DOI: 10.1002/ejlt.201600389

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  75. Extraction of phenolic compounds and antioxidant activity from garlic husk using carbon dioxide expanded ethanol 査読有り

    Chhouk Kimthet, Uemori Chiho, Wahyudiono, Kanda Hideki, Goto Motonobu

    CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION   117 巻   頁: 113 - 119   2017年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Engineering and Processing: Process Intensification  

    Garlic has been used as functional food and traditional medicine for many centuries. However, the garlic husk, which contributes 25% of garlic bulk, was regarded as agricultural waste. Recent studies have found that the extract from garlic husk contains phenolic compounds with antioxidant and anti-bacterial activities, which can be applied in food and pharmaceutical industries. In order to reduce the draw back of conventional methods, carbon dioxide expanded ethanol (CXE) was used to extract phenolic compounds from garlic husk. The extraction was carried out in ranges of temperature (50–200 °C), CO2 flow rate (0.5–2 mL/min) at constant pressure (10 MPa). The conventional Soxhlet extraction was also done to investigate the efficiency of CXE over conventional method. The high amount of phenolic compounds of 56.26 mg GAE/g of dried garlic husk and antioxidant activity (IC50) of 0.41 mg/mL was obtained at temperature of 200 °C and CO2 flow rate of 0.5 mL/min. The five major phenolic compounds identified from CXE method were garlic acid, 4-hydrobenzoic acid, caffeic acid, p-coumaric acid, and trans-ferulic acid.

    DOI: 10.1016/j.cep.2017.03.023

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  76. One-step synthesis of water-dispersible carbon nanocapsules by pulsed arc discharge over aqueous solution under pressurized argon 査読有り

    Hayashi Yui, Takada Noriharu, Wahyudiono, Kanda Hideki, Goto Motonobu

    RESEARCH ON CHEMICAL INTERMEDIATES   43 巻 ( 7 ) 頁: 4201 - 4211   2017年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Research on Chemical Intermediates  

    Water–dispersible carbon nanocapsules were synthesized in a one-step process by a pulsed arc discharge over glycine solution under pressurized argon. Pulsed arc discharge from a copper electrode was introduced to the glycine solution surface to generate carbon materials. The experiments were conducted at room temperature under argon atmospheric pressure to 4.0 MPa. The carbon products seemed to have high dispersibility in water. They were composed of carbon nanocapsules with a few graphitic layers doped with nitrogen. The generated carbon nanocapsules reacted with carboxylic active compounds. The carbon nanocapsules were produced only under high pressures, over 1.5 MPa. The pressure affected the synthetic rate of carbon nanocapsules and nitrogen doped levels, conversely, it had a small influence on the amount of oxygen atoms in the carbon products.

    DOI: 10.1007/s11164-017-2879-6

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  77. Extraction of Phytochemicals from Grains of Paradise Using Supercritical Carbon Dioxide 査読有り

    Ono Maiko, Kawamoto Yukihiro, Uemori Chiho, Wahyudiono, Kanda Hideki, Goto Motonobu

    ENGINEERING JOURNAL-THAILAND   21 巻 ( 4 ) 頁: 53 - 64   2017年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering Journal  

    Supercritical carbon dioxide (SCCO2) is one of the green methods to extract plant matters substances. In this study, SCCO2 has been applied as a media to extract the grains of paradise seeds substances at temperatures of 40 – 80°C and pressures of 20 – 40 MPa using a semi – continuous flow–type system. Results of FT–IR spectra analysis showed that the grains of paradise seeds substances were extracted by SCCO2. The SEM images of the grains of paradise seeds residues also showed that the physical changes of the grains of paradise seeds surface occurred after SCCO2 extraction. The main compounds in extracts were gingerols, shogaols, and paradols. However, the GC-MS may only identify paradol compounds due to gingerols, shogaols, and paradols are homologous series of phenolic ketones and paradols was more stable than gingerols and shogaols. The yields of gingerols, shogaols, and paradols were 9.12, 3.90, and 4.42 mg/g sample, respectively and affected by extraction temperatures and/or extraction pressures.

    DOI: 10.4186/ej.2017.21.4.53

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  78. Esterification of high free fatty acids in supercritical methanol using sulfated angel wing shells as catalyst 査読有り

    Syazwani O. Nur, Ibrahim M. Lokman, Wahyudiono, Kanda Hideki, Goto Motonobu, Taufiq-Yap Y. H.

    JOURNAL OF SUPERCRITICAL FLUIDS   124 巻   頁: 1 - 9   2017年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    In this research, shells of Cyrtopleura costata, commonly known as angel wing, were used to prepare sulfated calcined angel wing shell (CAWS) catalysts by a simple, low-cost method. The produced CAWS-SO4catalyst was characterized by using X-ray diffraction (XRD), Fourier transmission infrared spectroscopy (FTIR), temperature programmed desorption of CO2and NH3(CO2-TPD and NH3-TPD), BET surface area analysis and variable pressure scanning electron microscopy (VP-SEM). The esterification of palm fatty acid distillate (PFAD) by supercritical methanol was successfully performed to obtain the high fatty acid methyl esters (FAME) with yield of 98% at the optimum methanol/PFAD molar ratio of 6/1, 2 wt.% catalyst loading, 290 °C in 15 min. The catalyst could also be reused up to seven cycles with a FAME yield higher than 80% in the last cycle. The characterization of spent catalyst has been performed by using XRD, FTIR, TPD-NH3and SEM.

    DOI: 10.1016/j.supflu.2017.01.002

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  79. Fluorine-doped tin oxide catalyst for glycerol conversion to methanol in sub-critical water 査読有り

    Samad Wan Zurina, Gotob Motonobu, Kanda Hideki, Wahyudiono, Nordin Norazzizi, Liew Kin Hong, Yarmo Mohd Ambar, Yusop Muhammad Rahimi

    JOURNAL OF SUPERCRITICAL FLUIDS   120 巻   頁: 366 - 378   2017年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    In this study, a method for the catalytic conversion of glycerol to methanol in sub-critical water (subCW) is proposed. Glycerol conversion to methanol using the subCW method is a new attempt to the best of the authors's knowledge and this process was compared with the conventional hydrogenolysis method. For the first time, fluorine-doped tin oxide (FTO) was applied as a novel heterogeneous catalyst for the conversion of glycerol to methanol. The sub-critical reaction was conducted under optimal and mild conditions at a reaction temperature of 300 °C, reaction time of 30 min, and at a low pressure sufficient to maintain the liquid phase. Initial feedstock (glycerol) concentration and catalyst amount of 20 wt% and 0.01 g respectively, were utilized and glycerol conversion and methanol selectivity were measured using gas chromatography-flame ion detector (GC-FID) analysis. Optimum glycerol conversion of ∼80% was achieved, with methanol as the major product with a selectivity of ∼100%. The subCW method can also be applied for extraction processes as well as biomass conversion by optimizing some parameters such as reaction time, catalyst amount, reaction temperatures, and catalyst cyclability.

    DOI: 10.1016/j.supflu.2016.05.041

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  80. Synthesis of hydrophilic carbon nanoparticles from amino acids by pulsed arc discharge over aqueous solution in argon under near-critical pressure 査読有り

    Hayashi Yui, Takada Noriharu, Wahyudiono, Kanda Hideki, Goto Motonobu

    JOURNAL OF SUPERCRITICAL FLUIDS   120 巻   頁: 403 - 407   2017年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Supercritical Fluids  

    Hydrophilic carbon nanoparticles (CNPs) were synthesized from amino acids using a pulsed arc discharge over an aqueous solution surface under pressurized argon at 4 MPa. The CNPs produced using this method were highly dispersible in water because their surfaces were modified by hydrophilic groups derived from the amino acids. The number of carbons in the straight chain of the source amino acids affected the generation of the CNPs, leading to different particle sizes, crystallinities, and nitrogen compositions. The oxygen content in the CNPs was independent of the source amino acid, but the nitrogen content was affected by the atomic ratio of nitrogen in the source amino acid.

    DOI: 10.1016/j.supflu.2016.07.008

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  81. Hydrogen Peroxide Formation by Electric Discharge with Fine Bubbles 査読有り

    Hayashi Yui, Takada Noriharu, Wahyudiono, Kanda Hideki, Goto Motonobu

    PLASMA CHEMISTRY AND PLASMA PROCESSING   37 巻 ( 1 ) 頁: 125 - 135   2017年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Plasma Chemistry and Plasma Processing  

    Pulsed discharge plasma is typical oxidation technology for disposing organic compounds in aqueous solutions. When this electrical discharge plasma was applied in water, it may produce hydrogen peroxide (H2O2) without any catalyst or chemical agent. In order to increase H2O2 production by electrical discharge plasma in water, fine bubbles were introduced into the electrical discharge plasma in this experiment. Bipolar pulsed voltages were applied to cylindrical electrodes in the water while Ar or O2 bubbles were introduced, generating a pulsed discharge plasma. The introduction of the bubbles seemed to enhance the dissociation of water molecules and increased H2O2 formation, especially with O2 bubbling. Dissolved oxygen in the water contributed to H2O2 formation by pulsed discharge plasma with the bubbles, while dissociation of water molecules was the cause of H2O2 formation by pulsed discharge plasma without bubbles. More H2O2 was formed by pulsed discharge plasma with O2 bubbles, because the amount of dissolved oxygen in the water increased upon bubbling with O2.

    DOI: 10.1007/s11090-016-9767-5

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  82. Extraction of Curcumin From Curcuma longa L. Using Ultrasound Assisted Supercritical Carbon Dioxide 査読有り

    Kimthet Chhouk, Wahyudiono, Kanda Hideki, Goto Motonobu

    INTERNATIONAL SEMINAR ON FUNDAMENTAL AND APPLICATION OF CHEMICAL ENGINEERING 2016 (ISFACHE 2016)   1840 巻   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AIP Conference Proceedings  

    Curcumin is one of phenolic compounds, which has been recently shown to have useful pharmacological properties such as anti-inflammatory, anti-bacterial, anti-carcinogenic, antifungal, and antimicrobial activities. The objective of this research is to extract the curcumin from Curcuma longa L. using ultrasound assisted supercritical carbon dioxide extraction (USC-CO2). The extraction was performed at 50°C, 25 MPa, CO2 flow rate of 3 mL/min with 10% cosolvent. The result of extraction, thermogravimetry (TG), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) showed that ultrasound power could disrupt cell wall and release the target compounds from Curcuma longa L. USC-CO2 could provide higher curcumin content in the extracts and faster extraction compared to SC-CO2 extraction without ultrasound.

    DOI: 10.1063/1.4982318

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  83. Sub-And supercritical fluids extraction of phytochemical compounds from eucheuma cottonii and gracilaria sp 査読有り

    Machmudah S., Widiyastuti, Winardi S., Wahyudiono, Kanda H., Goto M.

    Chemical Engineering Transactions   56 巻   頁: 1291 - 1296   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Engineering Transactions  

    Subcritical water and supercritical CO2 extraction of phytochemical compounds from Eucheuma cottonii (E. cottonii) and Gracilaria sp. have been investigated at various temperatures and pressures in a semi-batch extractor. These methods are environmentally friendly extraction method without organic solvents other than water and CO2. Eucheuma cottonii (E. cottonii) and Gracilaria sp. are macroalgae that widely grow in the southern coast of Madura Island, Indonesia. They had been used for food in direct human consumption and feedstocks for the pharmaceutical and cosmetics industries due to rich both in minerals and essential trace elements. In order to increase the value of macroalgae, it is necessary to separate them into its component with extraction method. Subcritical water extraction was carried out at temperatures of 120 - 200 °C and pressures of 1 - 10 MPa, while supercritical CO2 extraction was conducted at temperatures of 40 - 80 °C and pressures of 15 - 25 MPa with ethanol as co-solvent. The phytochemical compounds extracted by subcritical water consisted of carrageenan and phenolic compounds. Results of FT- IR spectra analysis showed that the macroalgae components were reacted and consumed in these range temperatures. The change of temperature extraction had a strong influence on the yields of extracted carrageenan and phenolic compounds. By using supercritical CO2, the extract contained β-carotene and linoleic acid. Recovery of both β-carotene and linoleic acid increased as increasing temperature and pressure. The addition of ethanol as co-solvent in the supercritical extraction could increase the recovery of β-carotene and linoleic acid ten and two fold. The results confirmed that subcritical water and supercritical CO2 extraction are applicable method for the separation of phenolic compounds from E. cottonii and Gracilaria sp., and may lead to an advanced plant biomass components extraction technology.

    DOI: 10.3303/CET1756216

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  84. Reaction of Cl- Ions in Electrolyte Solution Induced Electrical Discharge Plasma in the Presence of Argon Fine Bubbles 査読有り

    Hayashi Yui, Takada Noriharu, Wahyudiono, Kanda Hideki, Goto Motonobu

    INTERNATIONAL SEMINAR ON FUNDAMENTAL AND APPLICATION OF CHEMICAL ENGINEERING 2016 (ISFACHE 2016)   1840 巻   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AIP Conference Proceedings  

    Active chlorine species such as chlorine molecules and hypochlorous acid have been known as high performance sanitizers. They would act more reactive on chemical and biological substances when an electrical discharge was introduced in water containing an electrolyte substance. Here, the reaction of chloride (Cl-) ions were examined by introducing of a pulsed discharge plasma in sodium chloride (NaCl) solution as an electrolyte solution at room temperature. The results show that a large electrical current generated by the pulsed discharge plasma affected the reaction of Cl- ions to result available chlorine. The reaction pathway for available chlorine production was assumed similar with the reaction pathway as electrolysis. A pulsed discharge plasma in NaCl solution in the presence of argon (Ar) fine bubbles exhibited intense emissions and high electron density compared to when no Ar fine bubbles were introduced. At these conditions, the dissociation reaction rate of water increased drastically leads to the formation of 0 atoms. As a result, the reaction of Cl- ions and the available chlorine generation were also increased.

    DOI: 10.1063/1.4982259

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  85. Hydrothermal Extraction of Antioxidant Compounds From Mangosteen Pericarp With Low-Transition-Temperature Mixture and Sonication Pretreatment 査読有り

    Machmudah Siti, Widiyastuti, Nurtono Tantular, Winardi Sugeng, Wahyudiono, Kanda Hideki, Goto Motonobu

    INTERNATIONAL SEMINAR ON FUNDAMENTAL AND APPLICATION OF CHEMICAL ENGINEERING 2016 (ISFACHE 2016)   1840 巻   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AIP Conference Proceedings  

    Antioxidant compounds from mangosteen pericarps have been extracted with low-transition-temperature mixture (LTTM) assisted hydrothermal method. Extracted antioxidant compounds were determined as xanthone and total phenolic compounds. The effects of temperature, concentration of LTTM, and sonication pretreatment on the recovery of xanthone and total phenolic compounds were investigated. Extraction were carried out in a batch extractor at various temperatures (120 - 160°C), concentrations of LTTM (0.1 - 0.3 mg/mL), and sonication pretreatments (0 - 10 min). LTTM used for extraction was consisted of citric acid as hydrogen bond donor and alanine as hydrogen bond acceptor. Xanthone and total phenolic compounds were analyzed by spectrophotometer. In order to determine the effect of extraction condition on the antioxidant efficiency of the extract, the antioxidant efficiency of extract were analyzed by DPPH assay method. Based on the result, the recovery of xanthone increased as increasing temperature and concentration of LTTM. Inversely, the recovery of total phenolic compounds decreased as increasing temperature. The sonication pretreatment had significantly effect on the recovery of both xanthone and total phenolic compounds, however the optimum condition of sonication pretreatment was at 5 min. The antioxidant efficiency of the extract was affected by the extraction condition, and the highest antioxidant efficiency was 1.395 obtained at temperature of 120°C, LTTM concentration of 0.3 mg/mL, and sonication time of 5 min.

    DOI: 10.1063/1.4982289

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  86. Hydrolysis of Biopolymers in Near-Critical and Subcritical Water 査読有り

    Machmudah Siti, Wahyudiono, Kanda Hideki, Goto Motonobu

    WATER EXTRACTION OF BIOACTIVE COMPOUNDS: FROM PLANTS TO DRUG DEVELOPMENT     頁: 69 - 107   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Water Extraction of Bioactive Compounds: From Plants to Drug Development  

    Near-critical and subcritical waters have been known as green solvents that can be applied in many different fields of applications. In recent years, they have been proposed as solvents media to recover waste substances from plant biomass. Near-critical and subcritical water treatment is a powerful technique and one of the most effective methods for this, because water at around its critical point behaves as a reaction medium with unique properties. Water at around its critical point was able to promote various reactions such as oxidation, hydrolysis, and dehydration. Hence, near-critical and subcritical water can be used for the conversion of plant biomass composed of three major biopolymers (i.e., cellulose, hemicellulose, and lignin) to value-added chemical compounds, as well as for oxidizing hazardous waste into CO2 or harmless compounds. This chapter presents the concepts of near-critical and subcritical water and their application in degradation of plant biomass components at temperatures of 100-400°C.

    DOI: 10.1016/B978-0-12-809380-1.00003-6

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  87. Thermal isomerization of (all-E)-lycopene and separation of the Z-isomers by using a low boiling solvent: Dimethyl ether 査読有り

    Murakami Kazuya, Honda Masaki, Wahyudiono, Kanda Hideki, Goto Motonobu

    SEPARATION SCIENCE AND TECHNOLOGY   52 巻 ( 16 ) 頁: 2573 - 2582   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Separation Science and Technology (Philadelphia)  

    Thermal isomerization of (all-E)-lycopene and the separation of generated Z-isomers were conducted using a low boiling solvent, dimethyl ether (DME). Because of the low boiling point (–24.8°C), DME is easily separated from lipids and other residues and is extremely low residual. The efficiency of thermal Z-isomerization of (all-E)-lycopene in DME was almost equivalent to using hexane. The thermally generated lycopene Z-isomers were separated by utilizing the solubility differences among lycopene isomers and a characteristic of DME that allows the solubility of compounds to be controlled by changing the temperature. Finally, a lycopene mixture containing 72.0% Z-isomers was obtained from (all-E)-lycopene.

    DOI: 10.1080/01496395.2017.1374412

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  88. Extraction of lipids from wet Arthrospira platensis by liquefied dimethyl ether 査読有り

    Hoshino R., Ogawa M., Murakami K., Wahyudiono, Kanda H., Goto M.

    Solvent Extraction Research and Development   24 巻 ( 1 ) 頁: 47 - 60   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Solvent Extraction Research and Development  

    Simple and energy-saving extraction of lipids and functional substances from wet Arthrospira platensis by using liquefied dimethyl ether (DME) is proposed. In the proposed method, drying of microalgae, cell wall breaking, heating for solvent evaporation is unnecessary. Direct extraction from wet A. platensis was successfully achieved. 94.2 wt% of the water in the A. platensis was removed by liquefied DME extraction and a dry residue was obtained. The amounts of carotenoid pigments extracted by liquefied DME were less than those by supercritical carbon dioxide (SC-CO2) extraction and hexane extraction. Also the amounts of carotenoid pigments extracted were smaller than those extracted with conventional solvents such as SC-CO2 and hexane.

    DOI: 10.15261/serdj.24.47

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  89. Extraction of Lipids from Wet Arthrospira platensis by Liquefied Dimethyl Ether 査読有り

    Hoshino Rintaro, Ogawa Masaki, Murakami Kazuya, Wahyudiono, Kanda Hideki, Goto Motonobu

    SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN   24 巻   頁: 47-60   2017年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  90. Production of Liposome from Sphingomyelin by Ultrasonic Device under Supercritical Carbon Dioxide. 査読有り

    Chiho Uemori, Tsubasa Katsube, Siti Machmudah, Wahyudiono, Hideki Kanda, Keiji Yasuda, Motonobu Goto.

    Asian Journal of Applied Sciences   5 巻 ( 5 ) 頁: 1042-1048   2017年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  91. The E/Z isomer ratio of lycopene in foods and effect of heating with edible oils and fats on isomerization of (all-E)-lycopene. 査読有り

    Masaki Honda, Kazuya Murakami, Yo Watanabe, Takuma Higashiura, Tetsuya Fukaya, Wahyudiono, Hideki Kanda, Motonobu Goto.

    European Journal of Lipid Science and Technology   119 巻   頁: 1600389(1-9)   2017年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  92. Integrated Process for beta-glucan Concentrate from Ganoderma lucidum by Extraction and Micronization. 査読有り

    Siti Machmudah, Shoko Kodama, Wahyudiono, Hideki Kanda, Motonobu Goto.

    American Chemical Science Journal   11 巻 ( 4 ) 頁: Article no. ACSJ.22842 (8pp)   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  93. Functional Ingredients Extraction from Citrus Genkou by Supercritical Carbon Dioxide. 査読有り

    Yukihiro Kawamoto, Yuriko Suidou, Takuya Suetsugu, Arata Takamizu, Masahiro Tanaka, Wahyudiono, Hideki Kanda, Motonobu Goto, Munehiro

    Asian Journal of Applied Sciences   4 巻 ( 4 ) 頁: 833-838   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  94. Hydrothermal extraction of phytochemical compounds from polygonum cuspidatum roots in a semi-batch reactor system. 査読有り

    Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    ARPN Journal of Engineering and Applied Sciences   11 巻   頁: 8509-8518   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  95. Generation of Multi-hollow Structured Poly(methyl methacrylate) Fibers by Electrospinning under Pressurized CO2. 査読有り

    Wahyudiono, Koichi Okamoto, Siti Machmudah, Hideki Kanda, Motonobu Goto.

    Polymer Engineering & Science   56 巻 ( 7 ) 頁: 752-759   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  96. Macroporous Zirconia Particles Prepared by Subcritical Water in Batch and Flow Processes. 査読有り

    Siti Machmudah, Okky Putri Prastuti, Widiyastuti, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto

    Research on Chemical Intermediates   42 巻 ( 6 ) 頁: 5367-5385   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  97. Nickel Nanoparticles Generated by Pulsed Laser Ablation in Liquid CO2 査読有り

    Mardiansyah Mardis, Noriharu Takada, Siti Machmudah, Wahyudiono, Koichi Sasaki, Hideki Kanda, Motonobu Goto.

    Research on Chemical Intermediates   42 巻 ( 5 ) 頁: 4581-4590   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  98. An Innovative Method for the Extraction of Phenolic Compounds from Polygonum Cuspidatum. 査読有り

    Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Asian Journal of Applied Sciences   4 巻 ( 2 ) 頁: 339-347   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  99. Extraction of beta-glucan by Hydrothermal Liquidization of Barley Grain in a Semi-Batch Reactor. 査読有り

    Shoko Kodama, Tetsuya Shoda, Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Separation Science and Technology   51 巻 ( 2 ) 頁: 278-289   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  100. Extraction of phytochemicals from saffron by supercritical carbon dioxide with water and methanol as entrainer. 査読有り

    Hazuki Nerome, Mika Ito, Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    The Journal of Supercritical Fluids   107 巻   頁: 377-383   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  101. Effect of solvent on nanoparticle production of β-carotene by a supercritical anti-solvent process. 査読有り

    Hazuki Nerome, Siti Machmudah, Wahyudiono, Ryuichi Fukuzato, Takuma Higashiura, Hideki Kanda, Motonobu Goto.

    Chemical Engineering & Technology   39 巻 ( 10 ) 頁: 1771-1777   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  102. Economical wet extraction of lipid from labyrinthulea Aurantiochytrium limacinum by using liquefied dimethyl ether. 査読有り

    Rintaro Hoshino, Kazuya Murakami, Wahyudiono, Siti Machmudah, Yuji Okita, Eiji Ohashi, Hideki Kanda, Motonobu Goto.

    Engineering Journal   20 巻 ( 4 ) 頁: 145-153   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  103. Extraction of carotenoids and lipids from algae by supercritical CO2 and subcritical dimethyl ether. 査読有り

    Motonobu Goto, Hideki Kanda, Wahyudiono, Siti Machmudah.

    The Journal of Supercritical Fluids   96 巻   頁: 245-251   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  104. Subcritical Water Extraction of Xanthone from Mangosteen (Garcinia Mangostana Linn) Pericarp. 査読有り

    Siti Machmudah, Widiyastuti, Wahyudiono, Hideki Kanda, Sugeng Winardi, Motonobu Goto.

    Journal of Advanced Chemical Engineering   5 巻 ( 1 ) 頁: 117   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  105. Enhancing Pressurized Water Extraction of beta-glucan from Barley Grain by Adding CO2 under Hydrothermal Conditions. 査読有り

    Shoko Kodama, Tetsuya Shoda, Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Chemical Engineering and Processing: Process Intensification   97 巻   頁: 45-54   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  106. Extraction of valuable compounds from mangosteen pericarps by hydrothermal assisted sonication. 査読有り

    Siti Machmudah, Sarah Duta Lestari, Qifni Yasa' Ash Shiddiqi, Widiyastuti, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto.

    AIP Conference Proceedings   1699 巻   頁: 060008-7pp   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  107. Hydrophilic polymer composites synthesized by electrospinning under dense carbon dioxide. 査読有り

    Wahyudiono, Koichi Okamoto, Siti Machmudah, Hideki Kanda, Motonobu Goto.

    AIP Conference Proceedings   1699 巻   頁: 040010-7pp   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  108. Hot Compressed Water Extraction of Lignin by Using a Flow-Through Reactor. 査読有り

    Siti Machmudah, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Engineering Journal   19 巻 ( 4 ) 頁: 22-44   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  109. Mechanism of Macroporous Zirconia Particles Formation Prepared by Hydrothermal Synthesis. 査読有り

    Siti Machmudah, Okky Putri Prastuti, Widiyastuti, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Advanced Materials Research   1112 巻   頁: 538-541   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  110. Preparation of Ceria-Zirconia Mixed Oxide by Hydrothermal Synthesis. 査読有り

    Siti Machmudah, M. Akmal Hadian, Lenno Samodro K., Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto.

    Modern Applied Science   9 巻 ( 7 ) 頁: 134-139   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  111. Subcritical water extraction of polysaccharides using semi-batch extractor. 査読有り

    Shoko Kodama, tetsuya Shoda, Wahyudiono, Siti Machmudah, Hideki Kanda, Motonobu Goto.

    Modern Applied Science   9 巻 ( 7 ) 頁: 220-224   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  112. Magnetite Thin Film on Mild Steel Formed by Hydrothermal Electrolysis for Corrosion Prevention. 査読有り

    Siti Machmudah, Rizka Zulhijah, Wahyudiono, Heru Setyawan, Hideki Kanda, Motonobu Goto.

    Chemical Engineering Journal   268 巻   頁: 76-85   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  113. Characteristics of optical emission intensities and bubble-like phenomena induced by laser ablation in supercritical fluids. 査読有り

    Noriharu Takada, Siti Machmudah, Wahyudiono, Motonobu Goto, Koichi Sasaki

    Japanese Journal of Applied Physics   53 巻 ( 1 ) 頁: 010213   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  114. Hot Compressed Water Extraction of Polysaccharides from Ganoderma Lucidum using a Semi-Batch Reactor. 査読有り

    Yui Matsunaga, Wahyudiono, Siti Machmudah, Mitsuru Sasaki, Motonobu Goto.

    Asia-Pacific J. Chem. Eng   9 巻 ( 1 ) 頁: 125-133   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  115. Decomposition of Methyl Orange using Pulsed Discharge Plasma at Atmospheric Pressure: Effect of Different Electrodes. 査読有り

    Yui Hayashi, Wahyudiono, Siti Machmudah, Noriharu Takada, Hideki Kanda, Koichi Sasaki, Motonobu Goto.

    Japanese Journal of Applied Physics   53 巻   頁: 010212   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  116. Simultaneous extraction of valuable substances and water from citrus pomace using liquefied dimethyl ether. 査読有り

    Rintaro Hoshino, Wahyudiono, Siti Machmudah, Hideki Kanda, Motonobu Goto.

    Proceedings of the 2nd International Seminar on Fundamental & Application of Chemical Engineering   I 03 巻   頁: 03   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  117. Simultaneous extraction of water and essential oil from citrus leaves and peels using liquefied dimethyl ether. 査読有り

    Rintaro Hoshino, Wahyudiono, Siti Machmdah, Hideki Kanda, Motonobu Goto.

    Journal of Nutrition & Food Sciences   4 巻   頁: 1000301   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  118. Extraction of lipids and astaxanthin from wet Haematococcus pluvialis by liquefied dimethyl ether. 査読有り

    Panatpong Boonnoun, Yuko Kurita, Yuichi Kamo, Wahyudiono, Siti Machmudah, Yuji Okita, Eiji Ohashi, Hideki Kanda, Motonobu Goto.

    Journal of Nutrition & Food Sciences   4 巻   頁: 1000305   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  119. Simultaneous extraction of water and valuable substances from citrus leaves and peel using liquefied dimethyl ether. 査読有り

    Rintaro Hoshino, Wahyudiono, Siti Machmudah, Hideki Kanda, Motonobu Goto.

    Proceedings of European meetings on Supercritical Fluids     頁: LSH33   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  120. Micronization of fat-soluble functional pigment using supercritical carbon dioxide as anti-solvent. 査読有り

    Hazuki Nerome, Siti Machmudah, Wahyudiono, Ryuichi Fukuzato, Takuma Higashiura, Hideki Kanda, Motonobu Goto.

    Proceedings of European meetings on Supercritical Fluids     頁: LSH34   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  121. Extraction of fucoxanthin from raw macroalgae excluding drying and cell wall disruption by liquefied dimethyl ether. 査読有り

    Hideki Kanda, Yuichi Kamo, Siti Machmudah, Wahyudiono, Motonobu Goto.

    Marine Drugs   12 巻   頁: 2383-2396   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  122. Extraction of rice bran oil by supercritical carbon dioxide and solubility consideration. 査読有り

    Karin Tomita, Siti Machmudah, Wahyudiono, Ryuichi Fukuzato, Hideki Kanda, Armando T. Quitain, Mitsuru Sasaki, Motonobu Goto.

    Separation and Purification Technology   125 巻   頁: 319-325   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  123. Formation of PVP Hollow Fibers by Electrospinning in One-Step Process at Sub and Supercritical CO2. 査読有り

    Wahyudiono, Siti Machmudah, Hideki Kanda, Satoko Okubayashi, Motonobu Goto.

    Chemical Engineering and Processing: Process Intensification   77 巻   頁: 1-6   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  124. Fabrication of micro-hollow fiber by electrospinning process in near-critical carbon dioxide. 査読有り

    Koichi Okamoto, Wahyudiono, Siti Machmudah, Hideki Kanda, Satoko Okubayashi, Ryuichi Fukuzato, Motonobu Goto.

    AIP Conference Proceedings   1586 巻 ( 1 ) 頁: 43-47   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  125. Subcritical water extraction and direct formation of microparticulate polysaccharide powders from Ganoderma lucidum. 査読有り

    Yui Matsunaga, Siti Machmudah, Wahyudiono, Hideki Kanda, Mitsuru Sasaki, Motonobu Goto.

    International Journal of Technology   5 巻 ( 1 ) 頁: 40-50   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  126. Synthesis of ZrO2 nanoparticles by hydrothermal treatment. 査読有り

    Siti Machmudah, Widiyastuti, Okky Putri Prastuti, Tantular Nurtono, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto.

    AIP Conference Proceedings   1586 巻   頁: 166-172   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  127. Removal of Water Pollutants by Pulsed Discharge Plasma and Observation of Its Optical Emission Intensity at Atmospheric Pressure. 査読有り

    Yui Hayashi, Wahyudiono, Siti Machmudah, Hideki Kanda, Noriharu Takada, Koichi Sasaki, Motonobu Goto.

    Japanese Journal of Applied Physics   52 巻   頁: 11NE02   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  128. Non-catalytic reduction of total acid number (TAN) of naphthenic acids (NAs) using supercritical methanol. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Fuel Processing Technology   106 巻   頁: 641-644   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  129. Generation of PVP Fibers by Electrospinning in One-Step Process under High-Pressure CO2. 査読有り

    Wahyudiono, Siti Machmudah, Mitsuru Sasaki, Satoko Okubayashi, Motonobu Goto.

    International Journal of Industrial Chemistry   4 巻 ( 27 ) 頁: 1-6   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  130. Nanoparticle formation of lycopene/β-cyclodextrin inclusion complex using supercritical antisolvent precipitation. 査読有り

    Hazuki Nerome, Siti Machmudah, Wahyudiono, Ryuichi Fukuzato, Takuma Higashiura, Yong-Suk Youn, Youn-Woo Lee, Motonobu Goto.

    The Journal of Supercritical Fluids   83 巻   頁: 97-103   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  131. Pyrrole conversion induced pulse discharge plasma over a water surface under high-pressure argon. 査読有り

    Wahyudiono, Hiroshi Watanabe, Siti Machmudah, Tsuyoshi Kiyan, Mitsuru Sasaki, Hidenori Akiyama, Motonobu Goto.

    Chemical Engineering and Processing: Process Intensification   61 巻   頁: 51-57   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  132. Selective conversion of glucose into lactic acid and acetic acid with copper oxide under hydrothermal conditions. 査読有り

    Yuanqing Wang, Fangming Jin, Mitsuru Sasaki, Wahyudiono, Fengwen Wang, Zhenzi Jing, Motonobu Goto.

    AIChE Journal   59 巻 ( 6 ) 頁: 2096-2104   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  133. Palm oil transesterification in sub- and supercritical methanol with heterogeneous base catalyst. 査読有り

    Nyoman Puspa Asri, Siti Machmudah, Wahyudiono, Suprapto, Kusno Budikarjono, Achmad Roesyadi, Motonobu Goto.

    Chemical Engineering and Processing: Process Intensification   72 巻   頁: 63-67   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  134. Utilization of Sub and Supercritical Water Reactions in Resource Recovery of Biomass Wastes. 査読有り

    Wahyudiono, Siti Machmudah, Motonobu Goto.

    Engineering Journal   17 巻 ( 1 ) 頁: 1-12   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  135. Non Catalytic Transesterification of Vegetables Oil to Biodiesel in Sub-and Supercritical Methanol: A Kinetic's Study. 査読有り

    Nyoman Puspa Asri, Siti Machmudah, Wahyudiono, S. Suprapto, Kusno Budikarjono, Achmad Roesyadi, Motonobu Goto.

    Bulletin of Chemical Reaction Engineering & Catalysis   7 巻 ( 3 ) 頁: 215-223   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  136. Fabrication of Gold and Silver Nanoparticles with Pulsed Laser Ablation under Pressurized CO2. 査読有り

    Siti Machmudah, Wahyudiono, Noriharu Takada, Hideki Kanda, Koichi Sasaki, Motonobu Goto.

    Advances in Natural Sciences: Nanoscience and Nanotechnology   4 巻 ( 4 ) 頁: 045011   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  137. Preparation of Diamond Like Carbon (DLC) and Its Functionalization with Supercritical Fluid Pulsed Discharge Treatment. 査読有り

    Mitsuru Sasaki, Koichi Nagafuchi, Wahyudiono, Atsushi Nagira, Tsuyoshi Kiyan, Motonobu Goto, Hidenori Akiyama.

    Proc. 10th International Symposium on Supercritical Fluids     頁: 1-6   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  138. Pyrrole Conversion Induced Pulse Discharge Plasma over a Water Surface under High Pressure Argon. 査読有り

    Wahyudiono, Hiroshi Watanabe, Siti Machmudah, Tsuyoshi Kiyan, Mitsuru Sasaki, Hidenori Akiyama, Motonobu Goto.

    Chemical Engineering and Processing   61 巻   頁: 51-57   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  139. Supercritical Water as a Reaction Medium for Nitrogen-Containing Heterocycles. 査読有り

    Wahyudiono, Yui Matsunaga, Siti Machmudah, Mitsuru Sasaki, Motonobu Goto.

    J. Chem. Chem. Eng.   6 巻 ( 10 ) 頁: 897-910   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  140. A Dry Process for Polymer Nano-Microfibers Prepared by Electrospinning under Pressurized CO2. 査読有り

    Wahyudiono, Kanako Murakami, Siti Machmudah, Mitsuru Sasaki, Motonobu Goto.

    Japanese Journal of Applied Physics   51 巻 ( 1980 ) 頁: 7-15   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  141. Nickel removal from nickel etioporphyrin (Ni-EP) using supercritical water in the absence of catalyst. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Fuel Processing Technology   104 巻   頁: 67-72   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  142. Silver nanoparticles generated by pulsed laser ablation in supercritical CO2 medium. 査読有り

    Siti Machmudah, Takayuki Sato, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    High Pressure Research   32 巻 ( 1 ) 頁: 60-66   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  143. Production of nanofibers by electrospinning under pressurized CO2. 査読有り

    Wahyudiono, Kanako Murakami, Siti Machmudah, Mitsuru Sasaki, Motonobu Goto.

    High Pressure Research   32 巻 ( 1 ) 頁: 54-59   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  144. Non-catalytic vanadium removal from vanadyl etioporphyrin (VO-EP) using a mixed solvent of supercritical water and toluene: A kinetic study. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Fuel   92 巻 ( 1 ) 頁: 288-294   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  145. Reduction of total acid number (TAN) of naphthenic acid (NA) using supercritical water for reducing corrosion problems of oil refineries. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Fuel   94 巻 ( 1 ) 頁: 620-623   2012年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  146. Nano-structured particles production using pulsed laser ablation of gold plate in supercritical CO2. 査読有り

    Siti Machmudah, Wahyudiono, Yutaka Kuwahara, Mitsuru Sasaki, Motonobu Goto.

    The Journal of Supercritical Fluids   60 巻   頁: 63-68   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  147. Reduction of total acid number (TAN) of naphthenic acid (NA) using supercritical water for reducing corrosion problems of oil refineries. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Fuel   94 巻   頁: 620-623   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  148. Effects of Supercritical Water on Removal of Vanadium from Vanadyl Etioporphyrin. 査読有り

    Mitsuru Sasaki, Pradip Chandra Mandal, Wahyudiono, Motonobu Goto.

    Journal of Science and Technology   49 巻 ( 5 ) 頁: 184-191   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  149. Nano-structured Material Fabrication using Pulsed Laser Ablation in Supercritical CO2. 査読有り

    Siti Machmudah, Takayuki Sato, Wahyudiono, Yutaka Kuwahara, Mitsuru Sasaki, Motonobu Goto.

    Transaction Materials Research Society of Japan   36 巻 ( 3 ) 頁: 465-468   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  150. Degradation of aniline by pulsed discharge plasma in hydrothermal conditions. 査読有り

    Wahyudiono, Hiroshi Watanabe, Tsuyoshi Kiyan, Hidenori Akiyama, Mitsuru Sasaki, Motonobu Goto.

    Transaction Materials Research Society of Japan   36 巻 ( 3 ) 頁: 459-464   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  151. Kinetics and Reaction Pathways for Heptylbenzene Decomposition in Supercritical Water. 査読有り

    Pradip Chandra Mandal, Tatsuya Shiraishi, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Journal of Chemical Engineering of Japan   44 巻 ( 7 ) 頁: 486-493   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  152. Thermal decomposition of guaiacol in sub- and supercritical water and its kinetic analysis. 査読有り

    Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Journal of Material Cycles and Waste Management   13 巻 ( 1 ) 頁: 68-79   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  153. Nickel removal from nickel-5,10,15,20-tetraphenylporphine using supercritical water in absence of catalyst: A basic study. 査読有り

    Pradip Chandra Mandal, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Journal of Hazardous Materials   187 巻 ( 1-3 ) 頁: 600-603   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  154. Reaction kinetics and mechanism for hydrothermal degradation and electrolysis of glucose for producing carboxylic acids. 査読有り

    Mitsuru Sasaki, Takanari Oshikawa, Hiroshi Watanabe, Wahyudiono, Motonobu Goto.

    Research on Chemical Intermediates   37 巻 ( 2-5 ) 頁: 457-466   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  155. Bitumen upgrading under solvothermal/hydrothermal conditions. 査読有り

    Wahyudiono, Tatsuya Shiraishi, Mitsuru Sasaki, Motonobu Goto.

    Research on Chemical Intermediates   37 巻 ( 2-5 ) 頁: 375-381   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  156. Gold nanoparticles fabricated by pulsed laser ablation in supercritical CO2. 査読有り

    Siti Machmudah, Motonobu Goto, Wahyudiono, Yutaka Kuwahara, Mitsuru Sasaki.

    Research on Chemical Intermediates   37 巻 ( 2-5 ) 頁: 515-522   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  157. Non-catalytic liquefaction of bitumen with hydrothermal/solvothermal process. 査読有り

    Wahyudiono, Tatsuya Shiraishi, Mitsuru Sasaki, Motonobu Goto.

    The Journal of Supercritical Fluids   60 巻   頁: 127-136   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  158. Degradation of glycerol using hydrothermal process. 査読有り

    Lailatul Qadariyah, Mahfud, Sumarno, Siti Machmudah, Wahyudiono, Mitsuru Sasaki, Motonobu Goto.

    Bioresource Technology   102 巻 ( 1 ) 頁: 9267-9271   2011年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

▼全件表示

書籍等出版物 6

  1. “Emerging seaweed extraction techniques: Supercritical fluid extraction” in Sustainable Seaweed Technologies: Cultivation, Biorefinery, and Applications,

    Siti Machmudah, Wahyudiono, Hideki Kanda, and Motonobu Goto( 担当: 共著)

    Elsevier  2020年 

     詳細を見る

    記述言語:英語

  2. “Supercritical fluid-assisted electrospinning” in Green Electrospinning

    Siti Machmudah, Wahyudiono, Hideki Kanda, and Motonobu Goto( 担当: 共著)

    De Gruyter  2019年 

     詳細を見る

    記述言語:英語

  3. “Supercritical Fluid Extraction and Fractionation” in Encyclopedia of Sustainability Science and Technology

    Siti Machmudah, Wahyudiono, Hideki Kanda, and Motonobu Goto,( 担当: 共著)

    Springer  2018年 

     詳細を見る

    記述言語:英語

  4. “Hydrolysis of Biopolymers in Near-Critical and Subcritical Water” in Water Extraction of Bioactive Compounds

    Siti Machmudah, Wahyudiono, Hideki Kanda, and Motonobu Goto, ( 担当: 共著)

    Elsevier  2017年 

     詳細を見る

    記述言語:英語

  5. “Supercritical Fluid Extraction of Carotenoids” in High Pressure Fluid Technology for Green Food Processing

    Siti Machmudah, Wahyudiono, and Motonobu Goto, ( 担当: 共著)

    Springer  2015年 

     詳細を見る

    記述言語:英語

  6. “Upgrading of Oil Palm Empty Fruit Bunch to Value-Added Products” in Biomass and Bioenergy Applications,

    Mustakimah Mohamed, Suzana Yusup, Wahyudiono, Siti Machmudah, Motonobu Goto, and Yoshimitsu Uemura,( 担当: 共著)

    Springer  2014年 

     詳細を見る

    記述言語:英語

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講演・口頭発表等 17

  1. Correlation of extract composition on antioxidant activity of electrospun polyvinylpyrrolidone/bassela rubra linn leaf extract composite

    Septiani E.L.

    Key Engineering Materials 

     詳細を見る

    開催年月日: 2020年

    記述言語:英語   会議種別:口頭発表(一般)  

    DOI: 10.4028/www.scientific.net/KEM.851.122

    Scopus

  2. Sorption efficiency in dye removal and thermal stability of sorghum stem aerogel

    Septiani E.L.

    Materials Science Forum 

     詳細を見る

    開催年月日: 2019年

    記述言語:英語   会議種別:口頭発表(一般)  

    DOI: 10.4028/www.scientific.net/MSF.966.175

    Scopus

  3. Synthesis of Ceria Zirconia Oxides using Solvothermal Treatment. 国際会議

    Siti Machmudah, Widiyastuti, Sugeng Winardi, Wahyudiono, Hideki Kanda, and Motonobu Goto

    The 24th Regional Symposium on Chemical Engineeering 

     詳細を見る

    開催年月日: 2017年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Semarang, Central Java , Indonesia,   国名:インドネシア共和国  

  4. Extraction of Phytochemical Compounds from Eucheuma cottonii and Gracilaria sp. using Supercritical CO2 Followed by Subcritical Water. 国際会議

    Dwi Setyorini, Ridlo Aanisah, Siti Machmudah, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto

    The 24th Regional Symposium on Chemical Engineeering 

     詳細を見る

    開催年月日: 2017年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Semarang, Central Java , Indonesia,   国名:インドネシア共和国  

  5. Sub- and Supercritical Fluids Extraction of Phytochemical Compounds from Eucheuma cottonii and Gracilaria sp. 国際会議

    Siti Machmudah, Widiyastuti, Tantular Nurtono, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of RCChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Kuala Lumpur, Malaysia,   国名:マレーシア  

  6. Hydrothermal Extraction of Antioxidant Compounds From Mangosteen Pericarps With Low-Transition-Temperature Mixture and Sonication Pretreatment 国際会議

    Siti Machmudah, Widiyastuti, Tantular Nurtono, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of ISFAChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Surabaya, Indonesia,   国名:インドネシア共和国  

  7. Lipid Extraction from Wet Microalgae as Biofuel Resources by Liquefied Dimethyl Ether 国際会議

    Rintaro Hoshino, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of ISFAChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Surabaya, Indonesia,   国名:インドネシア共和国  

  8. Extraction of curcumin from curcuma longa using ultrasound assisted supercritical carbon dioxide 国際会議

    Chhouk Kimthet, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of ISFAChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Surabaya, Indonesia,   国名:インドネシア共和国  

  9. Reaction of Cl− Ions in Electrolyte Solution Induced Electrical Discharge Plasma in the Presence of Argon Fine Bubbles 国際会議

    Yui Hayashi, Noriharu Takada, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of ISFAChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Surabaya, Indonesia,   国名:インドネシア共和国  

  10. Subcritical Water Extraction of Valuable Compounds from Eucheuma cottonii and Gracilaria sp 国際会議

    Siti Machmudah, Widiyastuti, Tantular Nurtono, Sugeng Winardi, Wahyudiono, Hideki Kanda, Motonobu Goto

    Proceeding of ISFAChE 2016 

     詳細を見る

    開催年月日: 2016年11月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Surabaya, Indonesia,   国名:インドネシア共和国  

  11. Utilization of Diatom Chaetoceros Gracilis by using Liquefied Dimethyl Ether Extraction for Biodiesel Fuel Resource 国際会議

    Kazuya Murakami, Rintaro Hoshino, Wahyudiono, Hideki Kanda, Motonobu Goto

    Bioresource Technology for Bioenergy, Bioproducts & Environmental Sustainability, 1st International Conference (BRTX 2016) 

     詳細を見る

    開催年月日: 2016年10月

    記述言語:英語   会議種別:ポスター発表  

    開催地:Sitges, Spain,   国名:スペイン  

  12. Extraction of lipids and functional components from wet algae by liquefied dimethyl ether 国際会議

    Motonobu Goto, Rintaro Hoshino, Wahyudiono, Hideki Kanda

    The 7th International Conference on Green and Sustainable Chemistry (GSC-7) and 4th JACI/GSC Symposium  

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:ポスター発表  

    国名:日本国  

  13. Hydrophilic Polymer Composites Synthesized by Electrospinning under Dense Carbon Dioxide 国際会議

    Wahyudiono, Koichi Okamoto, Hideki Kanda, Motonobu Goto

    Proceeding of International Conference on Chemical and Material Engineering 2015 

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地: Indonesia,   国名:インドネシア共和国  

  14. Molecular Conversion of Phytochemicals During Supercritical Fluid Extraction Process from Plant Materials 国際会議

    Chiho Uemori, Mika Ito, Hazuki Nerome, Wahyudiono, Hideki Kanda, Motonobu Goto

    Asian Pacific Confederation of Chemical Engineering (APCChE) 2015  

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:ポスター発表  

    開催地:Australia   国名:オーストラリア連邦  

  15. Energy-saving lipid extraction from wet labyrinthulea Aurantiochytrium limacinum by liquefied dimethyl ether 国際会議

    Kazuya Murakami, Rintaro Hoshino, Masaki Ogawa, Yuji Okita, Eiji Ohashi, Wahyudiono, Siti Machmudah, Hideki Kanda, Motonobu Goto

    The 7th International Conference on Green and Sustainable Chemistry (GSC-7) and 4th JACI/GSC Symposium 

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:ポスター発表  

    国名:日本国  

  16. Recovery of Phytochemicals from Saffron by Supercritical Carbon Dioxide Extraction 国際会議

    Mika Ito, Hazuki Nerome, Chiho Uemori, Wahyudiono, Hideki Kanda, Motonobu Goto

    The 7th International Conference on Green and Sustainable Chemistry (GSC-7) and 4th JACI/GSC Symposium  

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:ポスター発表  

    国名:日本国  

  17. Subcritical water extraction of functional substances from biomass by using a flow-through reactor 国際会議

    Wahyudiono, Siti Machmudah, Widiyastuti, Hideki Kanda, Sugeng Winardi, Motonobu Goto

    The 7th International Conference on Green and Sustainable Chemistry (GSC-7) and 4th JACI/GSC Symposium 

     詳細を見る

    開催年月日: 2015年

    記述言語:英語   会議種別:ポスター発表  

    国名:日本国  

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