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Coacervation Microencapsulation of CaCO<sub>3</sub>Particles with a Fluoropolymer by Pressure-induced Phase Separation of Supercritical Carbon Dioxide Solutions

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Advances in Materials Physics and Chemistry 2012年第4期2卷 181-184页

作者： Kenji mishima Haruo Yokota Takafumi Kato Tadashi Suetsugu Xiuqin Wei Keiichi Irie kenichi mishima Michihiro Fujiwara Department of Chemical Engineering Fukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan Department of Chemical EngineeringFukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan Department of Electronics Engineering and Computer Science Fukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan Department of Electronics Engineering and Computer ScienceFukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan Department of Neuropharmacology Fukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan

We report a method for the coacervation micro-encapsulation of several forms of CaCO3 microparticles with the fluoropolymer poly(heptadecafluorodecyl acrylate) (poly (HDFDA)) by pressure-induced phase separation of a supercritical CO2 solution.? A suspension of CaCO3 in CO2 and dissolved poly(HDFDA) were mixed in supercritical CO2.? After the system pressure was slowly decreased to atmospheric pressure, the microcapsules were obtained.? Coacervation was achieved by the precipitation of poly(HDFDA) during the decrease in the pressure of CO2;the solubility of poly(HDFDA) in CO2 decreased with the pressure.? The structure and morphology of the microparticles were investigated by using a scanning electron microscope (SEM) and an electron probe microanalyzer (EPMA) equipped with a wavelength dispersive X-ray spectroscope (WDX).

关键词： Component Supercritical Carbon Dioxide Microencapsulation Coacervation Fluoropolymer Calcium Carbonate

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Is there diversity among UGT1A1 polymorphism in Japan?

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World Journal of Gastrointestinal Oncology 2012年第7期4卷 170-175页

作者： Michiya Kobayashi Shoichi Hazama kenichi Takahashi Koji Oba Naoko Okayama Mitsuaki Nishioka Yuji Hinoda Masaaki Oka Ken Okamoto Hiromichi Maeda Daisuke Nakamura Junichi Sakamoto Hideyuki mishima Department of Human Health and Medical Sciences Kochi Medical School Nankoku 783-8505 Japan Department of Digestive Surgery and Surgical Oncology (Surgery Ⅱ) Yamaguchi University Graduate School of Medicine Ube Yamaguchi 755-8505 Japan Department of Surgery Aomori Prefectural Central Hospital Aomori 030-8553 Japan Translational Research and Clinical Trial Center Hok-kaido University Hospital Sapporo 060-8638 Japan Division of Laboratory Yamaguchi University Hospital Ube Yamaguchi 755-8505 Japan Department of Oncology and Laboratory Medicine Yamaguchi University Graduate School of Medicine Ube Yama-guchi 755-8505 Japan Tokai University School of Medicine Is-ehara Kanagawa 259-1131 Japan Young Leaders Program in Healthcare Administration Nagoya University Graduate School of Medicine Nagoya 466-8550 Japan Department of Surgery Osaka National Hos-pital Osaka 565-0871 Japan

AIM: To investigate into the diversity of UGT1A1 polymorphism across three different districts in Japan and highlight genetic differences among the population in Japan. METHODS: We enrolled 50 healthy volunteers from each of the Yamaguchi (western part of Japan), Kochi(southern part of Japan) and Akita (northern part of Japan) prefectures. Blood samples (7 mL) were collected from each participant and stored in EDTA for subsequent genotyping by fragment size analysis, direct sequencing and TaqMan assay of UGT1A1*28, UGT1A7*3/UGT1A9*22 and UGT1A1*93/UGT1A1*6/ UGT1A1*27/UGT1A1*60/UGT1A7 (-57), respectively. RESULTS: The only statistically significant differences in allele polymorphisms among the group examined were for UGT1A1*6. The Akita population showed more UGT1A1*6 heterozygosity (P = 0.0496). CONCLUSION: Our study revealed no regional diversity among UGT1A1, UGT1A7 or UGT1A9 polymorphisms in Japan.

关键词： UGT1A1 gene Polymorphism Diversity

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