Kuroda

Gr. technetos, artificial) Element 43 was predicted on the basis of the periodic table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium. The element was actually discovered by Perrier and Segre in Italy in 1937. It was found in a sample of molybdenum, which was bombarded by deuterons in the Berkeley cyclotron, and which E. Eawrence sent to these investigators. Technetium was the first element to be produced artificially. Since its discovery, searches for the element in terrestrial material have been made. Finally in 1962, technetium-99 was isolated and identified in African pitchblende (a uranium rich ore) in extremely minute quantities as a spontaneous fission product of uranium-238 by B.T. Kenna and P.K. Kuroda. If it does exist, the concentration must be very small. Technetium has been found in the spectrum of S-, M-, and N-type stars, and its presence in stellar matter is leading to new theories of the production of heavy elements in the stars. 

Moehida, I., Kuroda, K., Miyamoto, S., Sotowa, C., Korai, Y., Kawano, S., Sakanishi, K., Yasutake, A. and Yoshikawa, M., Remarkable catalytic activity of calcined pitch-based activated carbon fiber for oxidative removal of SO2 as aqueous HjSO, Energy Fuels, 1997, 11(2), 272 276. 

Moehida, L, Kuroda, K., Kawano, S., Matsumura, Y., Yoshikawa, M., Grulkc, E. and Andrews, R., Kinetic study of the continuous removal of SO, using polyacrylonitrile-baaed activated carbon fibres. 2. Kinetic model, Fuel, 1997, 76(6), 537 541. 

Although synthetic approaches to these systems vary enough that no method can really be called typical, variations on the approach illustrated below as Eq. (4.15) has been used by both Pelissard and Louis °° and Tabushi, Okino, and Kuroda The example shown here is the work of the latter authors. 

H02 J.R. Hellmann, K. Kuroda, A.H. Heuer, and R.A. Graham, in Shock Waves in Condensed Matter-1983, edited by J.R. Asay, R.A. Graham, and G.K. Straub (North-Holland, Amsterdam, 1984), pp. 387-390. 

T. Irisawa, Y. Arima, T. Kuroda. Periodic changes in the structure of a surface growing under MBE conditions. J Cryst Growth 99 491-495, 1990. 

Kuroda, T, Furukawa, Y Jpn Kokai Tokkyo Koho 78 116 305, 1978, Chem Abstr 1979,90. 103374... 

Kobayashi, Y, Yamashita, T, Takahashi, K, Kuroda, H, Kumadaki, 1 Chem Pharm Bull 1984, 32, 4402... 

F. Suzuki, T. Kuroda, S. Kitamura, K. Ohmori, Europ. Pat. Appl. 

Saikawa, I., Takano, S., Yoshida, C., Takashima, 0., Momonoi, K., Kuroda, S., Komatsu, M., Yasuda,T. and Kodama, Y. British Patent 1,50B,071 April 19,197B assigned to Toyama Chemical Co., Ltd. and U.S. Patent 4,110,327 August 29, 197B also assigned to Toyama Chemical Co., Ltd,... 

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