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Showing papers by "K. Nishikawa published in 1993"

Journal Article•DOI•
Search for neutralino dark matter heavier than the W boson at Kamiokande.

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Masaki Mori1, Mihoko M. Nojiri, K. S. Hirata, K. Kihara, Yuichi Oyama, A. Suzuki2, Kasuke Takahashi, M. Yamada3, H. Takei4, H. Takei5, M. Koga5, Kazumasa Miyano5, H. Miyata5, Y. Fukuda6, T. Hayakawa6, K. Inoue6, Takanori Ishida6, Takaaki Kajita6, Yusuke Koshio6, Masayuki Nakahata6, K. Nakamura6, A. Sakai6, Nobuaki Sato6, Masato Shiozawa6, J. Suzuki6, Yasunari Suzuki6, Y. Totsuka6, M. Koshiba7, Kyoshi Nishijima7, T. Kajimura8, T. Suda8, A. Suzuki8, T. Hara9, Y. Nagashima9, M. Takita9, Hiroshi Yokoyama9, A. Yoshimoto9, K. Kaneyuki10, Y. Takeuchi10, Toru Tanimori10, Shigeki Tasaka11, K. Nishikawa6 •
Miyagi University of Education1, Tohoku University2, Niigata University of Pharmacy and Applied Life Sciences3, Japan Atomic Energy Agency4, Niigata University5, University of Tokyo6, Tokai University7, Kobe University8, Osaka University9, Tokyo Institute of Technology10, Gifu University11
15 Dec 1993-Physical Review D
TL;DR: This work has searched for possible high-energy neutrino signals which are expected from massive dark matter captured by the Earth and the Sun by making use of upward-going muon samples collected during 7 years of operation of the Kamiokande detector.
Abstract: We have searched for possible high-energy neutrino signals which are expected from massive dark matter captured by the Earth and the Sun by making use of upward-going muon samples collected during 7 years of operation of the Kamiokande detector. No excess of events was found from the Earth or the Sun, thus giving an excluded range of parameters for the neutralino dark matter which is hypothesized to constitute the halo of the Galaxy. The upper bounds extend to a mass range of up to [similar to]1 TeV, which was never analyzed in previous indirect searches.

41 citations

Journal Article•DOI•
Mobilization of acyl chains from endogenous cellular phospholipids into cholesteryl esters during foam-cell formation in mouse peritoneal macrophages

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K. Nishikawa1, Yoshihiro Sato1, Hidenobu C. Arai1, Keiichi Inoue1•
University of Tokyo1
08 Sep 1993-Biochimica et Biophysica Acta
TL;DR: Mobilization of acyl chains from endogenous phospholipids to the neutral lipid fraction was also observed during foam-cell formation induced by acetyl low-density lipoprotein, suggesting that the substance(s) produced within cell in the process of foam- cell formation may trigger the acyl chain mobilization from endogenousospholipIDS.

16 citations