A
Akemi Ryu
Researcher at University of Tokyo
Publications - 12
Citations - 1194
Akemi Ryu is an academic researcher from University of Tokyo. The author has contributed to research in topics: Singlet oxygen & Oxygen. The author has an hindex of 9, co-authored 12 publications receiving 1094 citations. Previous affiliations of Akemi Ryu include Kao Corporation.
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Journal ArticleDOI
Active Oxygen Species Generated from Photoexcited Fullerene (C60) as Potential Medicines: O2-• versus 1O2
Yoko Yamakoshi,Naoki Umezawa,Akemi Ryu,Kumi Arakane,Naoki Miyata,Yukihiro Goda,Toshiki Masumizu,Tetsuo Nagano +7 more
TL;DR: The results indicate that the active oxygen species primarily responsible for photoinduced DNA cleavage by C(60) under physiological conditions are reduced species such as O(2)(-)* and *OH.
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Participation of Reactive Oxygen Species in Phototoxicity Induced by Quinolone Antibacterial Agents
TL;DR: The data suggested that the phototoxicity of the new quinolones was related to DNA damage caused by reactive oxygen species, especially 1O2.
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Singlet Oxygen (1Δg) Generation from Coproporphyrin inPropionibacterium acneson Irradiation
Kumi Arakane,Akemi Ryu,Chikako Hayashi,Takuji Masunaga,Kouichi Shinmoto,Shinrou Mashiko,Tetsuo Nagano,Masaaki Hirobe +7 more
TL;DR: In this article, the authors measured the near-infrared emission spectra corresponding to the O2(1 delta g) --> O 2(3 epsilon g-) transition of singlet oxygen of cutaneous Propionibacterium acnes (P. acnes) porphyrin under laser excitation.
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Singlet oxygen production from fullerene derivatives : effect of sequential functionalization of the fullerene core
Takeshi Hamano,Kensuke Okuda,Tadahiko Mashino,Masaaki Hirobe,Kumi Arakane,Akemi Ryu,Shinrou Mashiko,Tetsuo Nagano +7 more
TL;DR: In this paper, the authors compared the oxygen production efficiency of several laser-excited fullerene derivative and compared the 1268 nm emissions, and found that the efficiency decreased with an increase in the number of addends, and addends at adjacent positions caused a greater decrease.
Journal ArticleDOI
Comparison of Singlet Oxygen Production Efficiency of C60 with Other Photosensitizers, Based on 1268 nm Emission.
Tetsuo Nagano,Kumi Arakane,Akemi Ryu,Takuji Masunaga,Kouichi Shinmoto,Shinrou Mashiko,Masaaki Hirobe +6 more
TL;DR: In this paper, a sensitive near-infrared emission spectrometer was used to monitor the O2(1Δg)→O2(3Σg-) transition at 1268nm.