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Your search keyword '"Hirahara, Hiroyuki"' showing total 14 results
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14 results on '"Hirahara, Hiroyuki"'

6. A Case of Successful Treatment of Ruptured Pancreaticoduodenal Artery Aneurysm Caused by Celiac Artery Dissection

Author

Kimura, Naruhiro, primary, Tsuchiya, Atsunori, additional, Nakamura, Akihiro, additional, Ueda, Muneatsu, additional, Yoshikawa, Seiichi, additional, Hoshi, Takahiro, additional, Takano, Akito, additional, Takagi, Satoshi, additional, Miura, Tsutomu, additional, Yamada, Satoshi, additional, Yanagi, Masahiko, additional, Tani, Tatsuo, additional, and Hirahara, Hiroyuki, additional

Published
2018
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7. Immunologic States Induced by Starvation : Suppression of Intrathymic T-cell Differentiation Contrasting with the Relative Resistance of Extrathymic T-cell Differentiation

Author

Ogawa, Mitsuru, Iiai, Tsuneo, Hirahara, Hiroyuki, Tomiyama, Katsuhiro, Kawachi, Yasuyuki, Watanabe, Hisami, Shimoji, Koki, and Abo, Toru

Abstract

Immunologic states induced by starvation were investigated in mice. Attention was focused on not only T cells of thymic origin but also extrathymically differentiated T cells. It was demonstrated that the numbers of lymphocytes yielded by the various immune organs, including the liver, spleen and thymus, prominently decreased during starvation (4-day period). At this time, intrathymic T-cell differentiation was profoundly suppressed and the number of thymus-derived T cells in the peripheral organs decreased. On the other hand, extrathymic T cells did not significantly decrease in number, especially in the liver. During starvation, a stress-associated glucocorticoid, corticosterone, was elevated in the serum of these mice. Since the in vivo injection of hydrocortisone induced a response similar to that seen during starvation, it is likely that glucocorticoids as well as a cessation of energy supply participates in immunologic states induced by starvation.

Published
1993

14. Experimental Investigations on Spray Characteristics in Twin-Fluid Atomizer.

Author

Watanawanyoo, Pipatpong, Hirahara, Hiroyuki, Mochida, Hirofumi, Furukawa, Teruyuki, Nakamura, Masanori, and Chaitep, Sumpun

Abstract

Abstract: A twin-fluid atomizer was designed and developed for fuel atomization. The droplet characteristic in the spray which was produced with the atomizer was investigated experimentally. Air flow induced in the atomizer causes a pressure reduction, hence the fuel is sucked into the atomizer. The mixture flow of air and liquid caused the atomization downstream due to the turbulence. In the twin-fluid atomizer, atomization is attained by injecting an air stream at tip of the liquid inlet port. In this research, the test liquid supply pressure was kept constant and the air flow rate through the atomizer was varied over a range of air supply pressure to obtain the variation in air liquid mass flow ratio (ALR) from 0.2 to 2.7. The results revealed that the air assisted atomizer had a capability to inject the test liquid in the range of the rates of 0.0019-0.00426kg/s, with the use of air pressure supplied from 68.9 to 689kPa. The images of the spray were obtained with a shadowgraph technique and analyzed to obtain the particle size and its distribution. Droplet size from twin-fluid atomizer had various sizes in the range of about 17-200 ℵΠm. The atomizer can be applied for aerosol and combustion purposes. [Copyright &y& Elsevier]

Published
2012
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