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58. Thermal aging of silicone oil aromatic polyamide insulation systems

Author

Abe, K., Hamaguchi, M., Umemura, T., and Umeda, M.

Subjects
Electric insulators -- Research, Breakdown (Electricity) -- Measurement, Dielectrics -- Research, Silicones -- Usage, Polyamides -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

The thermal degradation behavior of silicone oil/aromatic polyamide insulation system was studied. It was found that the flash and fire points decreased due to the formation of low molecular weight by-products of such cyclic siloxane oligomers as [D.sub.3], [D.sub.4] and [D.sub.5]. The gel permiation chromatography (GPC) and high performance liquid chromatography (HPLC) analysis clarified that the depolymerization of siloxane molecules happened during the thermal aging, resulting in the high- and low- molecular by-products formation. The thermal stability index (TGI) index obtained by the thermogravity (TG) measurements and cyclic oligomer detection could be used for the insulation diagnosis.

Published
1998

65. Cryogen free conduction cooled NbTi superconducting magnet for a X-band klystron

Author

Yokoyama, S., Minato, T., Imai, Y., Inaguchi, T., Kim, T.H., Umemura, T., Ogitsu, T., and Mizuno, H.

Subjects
Superconducting magnets -- Design and construction, Solenoids -- Design and construction, Klystrons -- Equipment and supplies, Business, Electronics, Electronics and electrical industries
Abstract

A cryogen free conduction cooled NbTi superconducting magnet for a X-band klystron was designed,fabricated, and tested successfully. The magnet has a room temperature bore of 190 mm. The rated field is 0.7 T. In order to meet the requested magnetic field distribution, the NbTi coil is separated to three parts and a return yoke is set. The coil is cooled by a two-stage Gifford-McMahon cycle refrigerator. The refrigeration capacity is 1.1 W at 6 K and 30 W at 40 K for each stage. Current leads are made of 2223 Bi-based oxide superconductor. The coil was cooled down to superconducting state from room temperature in 85 hours. The ultimate temperature of the coil was below 4K, and the coil was energized without quench to 18.5 A which was 105% of rated current. The power consumption of 6 kW is 1/8 of the normal conducting magnet. The thermal leak of 0.2 W into the coil was measured, which was the same value of the design.

Published
1996

74. Safety evaluation of certain food additives

Author

Barlow, S., Bend, J., Benford, D., Cantrill, R., Dessipri, E., Dinovi, M., Folmer, D., Mattia, A., Mueller, U., Orisakwe, O. E., Smith, J., Veerabhadra Rao, M., Yoon, H. J., Andersen, J. H., Barrows, J. N., Boon, P., Bruno, A., Choi, M., Dejager, L., Fallico, B., Fan, Y., Fattori, V., Gürtler, R., Hallstrom, H., Jia, X., Kim, S., Lambré, C., Laurvick, K., Leblanc, J. C., Lipp, M., Muldoon Jacobs, K., Mulholland, C., Odrowaz, J., Petersen, K., Rosenfeld, L., Rotstein, J., Sheffer, M., Srinivasan, J. R., Tada, A., Tritscher, A., Umemura, T., Yamamoto, R., Yang, X., and Zhang, L.

Published
2019

75. Evaluation of certain food additives: eighty-sixth report of the Joint FAO/WHO Expert Committee on Food Additives

Author

Barlow, S., Bend, J., Benford, D., Cantrill, R., Folmer, D., Mattia, A., Mueller, U., Orisakwe, O. E., Schlatter, J., Smith, J., Veerabhadra Rao, M., Bruno, A., Andersen, J. H., Barrows, J. N., Béchaux, C., Dinovi, M., Fallico, B., Fan, Y., Fernandez, M. J. F., Fields, B., Hambridge, T., Hill, F., Jeurissen, S. M. F., Jia, X., Kim, S., Laurvick, K., Lipp, M., Mosesso, P., Odrowaz, J., Petersen, K., Rosenfeld, L., Rotstein, J., Srinivasan, J. R., Sugimoto, N., Takasu, S., Tritscher, A., Umemura, T., Yang, X., and L. Zhang.

Published
2019

76. Health impact of Asian dust and protective effect of masks

Author

Masanori Nojima, Kazunari Onishi, Yoichi Kurozawa, Teruya Maki, and Umemura T

Subjects
Global and Planetary Change, Epidemiology, Asian Dust, business.industry, Health, Toxicology and Mutagenesis, Environmental health, Health impact, Public Health, Environmental and Occupational Health, Medicine, business, Pollution
Published
2019
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82. Compendium of Food Additive Specifications. Joint FAO/WHO Expert Committee on Food Additives (JECFA), 86th Meeting June 2018

Author

Barlow, S., Bend, J., Benford, D., Cantrill, R., Folmer, D., Mattia, A., Mueller, U., Orisakwe, O. E., Schlatter, J., Smith, J., Veerabhadra Rao, M., Bruno, A., Andersen, J. H., Barrows, J. N., Béchaux, C., Dinovi, M., Fallico, B., Fan, Y., Fernandez, M. J. F., Fields, B., Hambridge, T., Hill, F., Jeurissen, S. M. F., Jia, X., Kim, S., Laurvick, K., Lipp, M., Mosesso, P., Odrowaz, J., Petersen, K., Rosenfeld, L., Rotstein, J., Srinivasan, J. R., Sugimoto, N., Takasu, S., Tritscher, A., Umemura, T., Yang, X., and L. Zhang.

Subjects
food additives, food safety, evaluation, drug residues, chemical composition, drugs, chemical composition, drug residues, drugs, evaluation, food additives, food safety
Published
2018

87. Evaluation of certain food additives: eighty-fourth report of the Joint FAO/WHO Expert Committee on Food Additives

Author

Barlow, S., Bend, J., Benford, D., Cantrill, R., Dessipri, E., Dinovi, M., Folmer, D., Mattia, A., Mueller, U., Orisakwe, O. E., Smith, J., Veerabhadra Rao, M., Yoon, H. J., Andersen, J. H., Barrows, J. N., Boon, P., Bruno, A., Choi, M., Dejager, L., Fallico, B., Fan, Y., Fattori, V., Gürtler, R., Hallstrom, H., Jia, X., Kim, S., Lambré, C., Laurvick, K., Leblanc, J. C., Lipp, M., Muldoon Jacobs, K., Mulholland, C., Odrowaz, J., Petersen, K., Rosenfeld, L., Rotstein, J., Sheffer, M., Srinivasan, J. R., Tada, A., Tritscher, A., Umemura, T., Yamamoto, R., Yang, X., and Zhang, L.

Subjects
BRILLIANT BLUE FCF, 15'-DIOXYGENASE ACTIVITYT, FD-AND-C, CAROTENE 15, CAROTENE 15,15'-DIOXYGENASE ACTIVITYT
Published
2017

88. Compendium of food additive specifications, Joint FAO/WHO Expert Committee on Food Additives, 84th Meeting 2017

Author

Barlow, S., Bend, J., Benford, D., Cantrill, R., Dessipri, E., Dinovi, M., Folmer, D., Mattia, A., Mueller, U., Orisakwe, O. E., Smith, J., Veerabhadra Rao, M., Yoon, H. J., Andersen, J. H., Barrows, J. N., Boon, P., Bruno, A., Choi, M., Dejager, L., Fallico, B., Fan, Y., Fattori, V., Gürtler, R., Hallstrom, H., Jia, X., Kim, S., Lambré, C., Laurvick, K., Leblanc, J. C., Lipp, M., Muldoon Jacobs, K., Mulholland, C., Odrowaz, J., Petersen, K., Rosenfeld, L., Rotstein, J., Sheffer, M., Srinivasan, J. R., Tada, A., Tritscher, A., Umemura, T., Yamamoto, R., Yang, X., and Zhang, L.

Subjects
food additives, safety, impact assessment
Published
2017

89. A simple combination of higher-oxidation-state FeX3 and phosphine or amine ligand for living radical polymerization of styrene, methacrylate, and acrylate

Author

Aoshima, H., Satoh, Kotaro, Umemura, T., and Kamigaito, M.

Subjects
Denticity, Polymers and Plastics, Ligand, Organic Chemistry, Radical polymerization, Cationic polymerization, Bioengineering, Biochemistry, Styrene, chemistry.chemical_compound, chemistry, Polymer chemistry, Lewis acids and bases, Methyl methacrylate, Methyl acrylate
Abstract

Higher-oxidation-state iron halides [FeX3 (X = Cl, Br)] were employed in conjunction with a series of ligands, mainly monodentate phosphines and amines, to effect the living radical polymerization of various vinyl monomers such as styrene, methyl methacrylate (MMA), and methyl acrylate (MA). Almost all combinations examined could enable polymerizations in the absence of exogenous reducing agents. However, appropriate combinations of FeX3 and ligands gave rise to polymers in a living manner, with controlled molecular weights and narrow molecular weight distributions (Mw/Mn = 1.1–1.2). Ligand combinations included FeCl3 with PnBu3, PtBu3, or NnBu3 (for styrene); FeCl3 with PtBu3 or NnBu3 (for MMA); and FeBr3 with PPh3 (for MA). Model reactions and spectroscopic analysis suggest that FeCl3 most likely disproportionates into the Fe(III)Cl4− anion and Fe(III)Cl2+ cation in the presence of Lewis base ligands (PR3 and NR3). The latter cationic species, coordinated with the ligand [Fe(III)Cl2(PR3)+ or Fe(II)Cl2(PR3)˙+], acts as the active catalyst. Assistance from the electron-rich ligand allows the catalyst to induce metal-catalyzed living radical polymerization. The Fe(III)-based catalyst could also be easily and almost quantitatively removed from the polymer product simply by washing with aqueous acid to minimize the amount of iron contamination (

Published
2013

90. Insulin resistance and hepatitis C virus: a case-control study of non-obese, non-alcoholic and non-steatotic hepatitis virus carriers with persistently normal serum aminotransferase

Author

Tanaka, N, Nagaya, T, Komatsu, M, Horiuchi, A, Tsuruta, G, Shirakawa, H, Umemura, T, Ichijo, T, Matsumoto, A, Yoshizawa, K, Aoyama, T, Kiyosawa, K, and Tanaka, E

Abstract

Author Posting. © The Authors 2008 This is the author's version of the work. It is posted here for personal use, not for redistribution. The definitive version was published in Liver International, 28(8):1104-1111. https://doi.org/10.1111/j.1478-3231.2008.01737.x, Article, LIVER INTERNATIONAL. 28(8):1104-1111(2008)

Published
2008

94. Sustained virologic response by ledipasvir/sofosbuvir reduces the incidence of hepatocellular carcinoma in Japanese patients with HCV genotype 1 infection. - Comparison with Simeprevir with peginterferon plus ribavirin

Author

Korenaga, M., primary, Izumi, N., additional, Yokosuka, O., additional, Takehara, T., additional, Sakamoto, N., additional, Nishiguchi, S., additional, Ikeda, F., additional, Yanase, M., additional, Toyota, H., additional, Genda, T., additional, Umemura, T., additional, Yatsuhashi, H., additional, Ide, T., additional, Toda, N., additional, Nirei, K., additional, Ueno, Y., additional, Nishigaki, Y., additional, Omata, M., additional, and Mizokami, M., additional

Published
2017
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99. P0786 : 100% SVR12 with ledipasvir/sofosbuvir±ribavirin for 12 weeks in Japanese patients with chronic genotype 1 hepatitis C virus who previously failed therapy with protease inhibitor + pegylated interferonα + ribavirin

Author

Omata, M., primary, Takehara, T., additional, Yokosuka, O., additional, Sakamoto, N., additional, Korenagai, M., additional, Mochizuki, H., additional, Nakane, K., additional, Enomoto, H., additional, Yanase, M., additional, Toyoda, H., additional, Ikeda, F., additional, Genda, T., additional, Umemura, T., additional, Yatsuhashi, H., additional, Ide, T., additional, Toda, N., additional, Nirei, K., additional, Ueno, Y., additional, Nishigaki, Y., additional, De-Oertel, S., additional, Gao, B., additional, Dvory-Sobol, H., additional, Ishizaki, A., additional, Omote, M., additional, Pang, P.S., additional, Knox, S.J., additional, Symonds, W.T., additional, McHutchison, J.G., additional, Izumi, N., additional, and Mizokami, M., additional

Published
2015
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