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Removal of Radioactivity from Sediment Mud and Soil and Use for Cultivation of Safe Vegetables in Fukushima, and Removal of Toxic Metals Using Photosynthetic Bacteria

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Journal of Agricultural Chemistry and Environment 2015年第3期4卷 63-75页

作者： kei sasaki Kaoru Nakamura Kenji Takeno Hidenori Shinkawa Nachiketa Das Ken sasaki Faculty of Engineering Department of Food and Agriculture Bio-Recycle Hiroshima Kokusai Gakuin University Hiroshima Japan Department of Geology School of Earth Sciences Ravenshaw University Odisha India

The immobilized photosynthetic bacterium, Rhodobacter shpaeroides SSI (SSI), cultured on porous 2 cm ceramic beads, effectively removed and recovered 20 mg/L of non-radioactive Cs (almost 100%) and Sr (≌50%), after 3 - 5 days of aerobic treatment. Toxic and heavy metals such as Hg, Cr, Pb and As were also removed, almost 100%, after 6days of aerobic treatment. A practical method of removal of radioactivity of 10 - 30 μSv/h, caused mainly by radioactive Cs released from the accident at the Daiichi Nuclear Power Plant on 11th March 2011, from sediment mud and soil in Fukushima, Japan, was also carried out. Using immobilized SSI beads, more than 90% and 42% - 73% of radioactive Cs was removed and recovered from sediment mud and soil, respectively, after 3 - 14 days of aerobic treatment in an outdoor 60 L vessel. The weight and mass of the harvested beads could be reduced by more than 97% after desiccation. This technology of removal and recovery had therefore, considerable advantages over other technologies that demanded very large storage facilities in Fukushima. After removal of radioactivity from polluted soil, vegetables like Komatsuna (Turrip leaves) and Chingensai (Green pakchoi) were cultivated on remediated soil. Safe vegetables grown on these treated soils showed a radioactivity content lower than the recommended limit for edible foods in Japan, i.e. less than <100 Bq/kg. Treatment by SSI beads, therefore, appeared to be a compact and suitable technology that could make significant contributions towards agricultural recovery in radioactively polluted areas of Fukushima.

关键词： Immobilized Photosynthetic Bacteria Cs and Sr Heavy Metals Removal of Radioactivity Radioactive Cs Safe Vegetables

In Vivo Development of Fetal Pig Kidneys in Mature Monkeys under Clinically Approved Immunosuppressant Drugs

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Engineering 2022年第3期8卷 65-73页

作者： Tsuyoshi Takamura Kenji Matsui Naoto Matsumoto Yatsumu Saito Toshinari Fujimoto Susumu Tajiri Shuichiro Yamanaka kei Matsumoto Akimitsu Kobayashi Izumi Yamamoto Hiroshi sasaki Haruyuki Hirayama Hitomi Matsunari Kazuaki Nakano Hiroshi Nagashima Akihiko Kiyoshi Takao Kuroda Makoto Inoue Takeshi Miyawaki Takashi Yokoo Eiji Kobayashi Division of Nephrology and Hypertension Department of Internal MedicineThe Jikei University School of MedicineTokyo 105-8461Japan Department of Urology The Jikei University School of MedicineTokyo 105-8461Japan Department of Plastic and Reconstructive Surgery The Jikei University School of MedicineTokyo 105-8461Japan Meiji University International Institute for Bio-Resource Research Kanagawa 214-8571Japan Sumitomo Dainippon Pharma Co. Ltd.Osaka-fu 564-0053Japan Department of Kidney Regenerative Medicine The Jikei University School of MedicineTokyo 105-8461Japan

Controlling the immune response with only clinically approved immunosuppressant drugs is difficult in renal heterotra ns plantation from pigs to nonhuman ***,to the best of our knowledge,no reports exist on the use of fetal pigs as kidney *** study aimed to compare the degree of transplant rejection between neonatal and fetal kidneys,with genetically unmodified pigs as donors and cynomolgus monkeys as *** left kidneys of the recipient monkeys were removed,followed by transplantation of neonatal as well as fetal pig kidneys,which had undergone vascular anastomosis at the same site,into the *** was performed with only US Food and Drug Administration-approved *** fetal kidneys were transplanted into the omentum and paraaortic regions of cynomolgus ***,the engraftment and development of the transplanted tissues were pathologically examined by sampling over time(twice in each experiment).An acute rejection was observed after a few weeks in neonatal renal grafts with vascular ***,fetal pig kidneys were spared from rejection despite the administration of the same immunosuppressive protocol to the monkeys and the recipient blood vessels flowing into the fetal *** immunogenicity of fetal kidneys in pig-monkey renal heterotransplantation was lower than that of neonatal kidneys.

关键词： Cynomolgus monkey Pig Kidney Fetal kidney Immunosuppression

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生物基液体橡胶在轮胎中的应用研究

现代橡胶技术 2020年第1期46卷 23-31页

作者：赵冬梅(编译) kei Hirata Nobuhiro Moriguchi Hiromitsu sasaki 不详

可乐丽液体橡胶是一系列低分子量的聚二烯烃类材料,在轮胎橡胶部件配方中替代橡胶加工油类增塑剂使用,可以有效改善混炼胶的加工性能。液体橡胶的分子结构特点,决定了其能够与固体橡胶发生共硫化反应,所以,有别于普通增塑剂,不会发生迁... 详细信息

可乐丽液体橡胶是一系列低分子量的聚二烯烃类材料,在轮胎橡胶部件配方中替代橡胶加工油类增塑剂使用,可以有效改善混炼胶的加工性能。液体橡胶的分子结构特点,决定了其能够与固体橡胶发生共硫化反应,所以,有别于普通增塑剂,不会发生迁移或者喷霜现象,并且能保持或者改善橡胶部件应有的力学性能和动态粘弹性,延长轮胎的使用寿命。

关键词：液体橡胶增塑剂轮胎加工性能

Efficient Solvent- and Catalyst-Free Syntheses of Imine Derivatives Applying the Pressure Reduction Technique: Remarkable Change of the Reaction Rate with the Phase Transition

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Green and Sustainable Chemistry 2018年第2期8卷 167-179页

作者： Shoko Suzuki Shujiro Sakaki Shinji Ishizuka Tomomichi Nishino Hiroyuki Ito Risehiro Nonaka Motoyoshi Noike Takeshi Kodama Hajime Nozaka Tsuneyuki Sato Hitoshi Agematsu Koichi Maruyama Shun Oyamada Takashi Kuroishi Kazuma sasaki kei Yagawa Mami Yoshioka Yasuo Yokoyama Faculty of Education Kyoto University of Education Kyoto Japan Department of Chemical and Biological Engineering National Institute of Technology Akita College Akita Japan Environment Systems Engineering Course National Institute of Technology Akita College Akita Japan Department of Applied Chemistry National Institute of Technology Akita College Akita Japan

Because imines could be used as convenient starting materials in various fields, the development of an easy synthetic method of imine was strongly desired. In response to this demand, we thought that it would be an effective synthesis method if an aldehyde and an amine could be reacted to give an imine in good yield under solvent- and catalyst-free conditions. In fact, we tried the reaction of benzaldehyde with various amines under solvent- and catalyst-free conditions followed by removal of water that was produced in the reaction system by a vacuum pump, and desired imines could be obtained in good yields. Observation of this reaction using a nuclear magnetic resonance spectrometer revealed that the reaction rate was extremely fast at the initial stage but slowed over time. However, the reaction of benzaldehyde with aniline differed greatly, and the reaction rate dramatically improved in 47 - 48 minutes after the start of the reaction. At this time, we found that the reaction system underwent a phase transition from the liquid phase to the solid phase.

关键词： Solvent-Free Catalyst-Free Pressure Reduction Technique Imine Reaction Rate Phase Transition