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11 results on '"Takahiro, Ishikawa"'

1. Observation of the UV-induced Photocurrent in PET sheet using CNT thin-film electrodes

Author

Suzuki, Satoru, Nakamura, Taichi, Ishikawa, Takahiro, Konishi, Teruaki, Hamano, Tsuyoshi, Ohno, Yutaka, Ajiki, Hiroshi, Hirao, Toshio, Ishii, Satoshi, Takahiro, Ishikawa, Teruaki, Konishi, Tsuyoshi, Hamano, Suzuki, Satoru, Nakamura, Taichi, Ishikawa, Takahiro, Konishi, Teruaki, Hamano, Tsuyoshi, Ohno, Yutaka, Ajiki, Hiroshi, Hirao, Toshio, Ishii, Satoshi, Takahiro, Ishikawa, Teruaki, Konishi, and Tsuyoshi, Hamano

Abstract

Observation of the UV-induced Photocurrent in PET sheet using CNT thin-film electrodes, The 60th Fullerenes, Nanotubes and Graphene General Society

Published
2021

2. Evaluating the long-term effect of space radiation on the reproductive normality of mammalian sperm preserved on the International Space Station.

Author

Wakayama, Sayaka, Ito, Daiyu, Kamada, Yuko, Shimazu, Toru, Suzuki, Tomomi, Nagamatsu, Aiko, Araki, Ryoko, Ishikawa, Takahiro, Kamimura, Satoshi, Hirose, Naoki, Kazama, Kousuke, Yang, Li, Inoue, Rei, Kikuchi, Yasuyuki, Hayashi, Erika, Emura, Rina, Watanabe, Ren, Nagatomo, Hiroaki, Suzuki, Hiromi, Yamamori, Tohru, N Tada, Motoki, Osada, Ikuko, Umehara, Masumi, Sano, Hiromi, Kasahara, Haruo, Higashibata, Akira, Yano, Sachiko, Abe, Masumi, Kishigami, Satoshi, Kohda, Takashi, Ooga, Masatoshi, Wakayama, Teruhiko, Ryoko, Araki, Takahiro, Ishikawa, Satoshi, Kamimura, Masumi, Abe, Wakayama, Sayaka, Ito, Daiyu, Kamada, Yuko, Shimazu, Toru, Suzuki, Tomomi, Nagamatsu, Aiko, Araki, Ryoko, Ishikawa, Takahiro, Kamimura, Satoshi, Hirose, Naoki, Kazama, Kousuke, Yang, Li, Inoue, Rei, Kikuchi, Yasuyuki, Hayashi, Erika, Emura, Rina, Watanabe, Ren, Nagatomo, Hiroaki, Suzuki, Hiromi, Yamamori, Tohru, N Tada, Motoki, Osada, Ikuko, Umehara, Masumi, Sano, Hiromi, Kasahara, Haruo, Higashibata, Akira, Yano, Sachiko, Abe, Masumi, Kishigami, Satoshi, Kohda, Takashi, Ooga, Masatoshi, Wakayama, Teruhiko, Ryoko, Araki, Takahiro, Ishikawa, Satoshi, Kamimura, and Masumi, Abe

Abstract

Space radiation may cause DNA damage to cells and concern for the inheritance of mutations in offspring after deep space exploration. However, there is no way to study the long-term effects of space radiation using biological materials. Here, we developed a method to evaluate the biological effect of space radiation and examined the reproductive potential of mouse freeze-dried spermatozoa stored on the International Space Station (ISS) for the longest period in biological research. The space radiation did not affect sperm DNA or fertility after preservation on ISS, and many genetically normal offspring were obtained without reducing the success rate compared to the ground-preserved control. The results of ground x-ray experiments showed that sperm can be stored for more than 200 years in space. These results suggest that the effect of deep space radiation on mammalian reproduction can be evaluated using spermatozoa, even without being monitored by astronauts in Gateway.

Published
2021

11. Explorations and Applications of Enzyme-linked Bioremediation of Synthetic Dyes

Author

Henry Joseph Oduor Ogola, Hiroyuki Ashida, Takahiro Ishikawa, Yoshihiro Sawa, Henry Joseph Oduor Ogola, Hiroyuki Ashida, Takahiro Ishikawa, and Yoshihiro Sawa

Abstract

Extensive use of synthetic dyes and their subsequent release in industrial wastewater is a growing environmental problem. These dyes are recalcitrant in nature, and some dyes are also well established to be potentially carcinogenic and mutagenic as well as genotoxic. Research efforts have been devoted to develop new, low-cost, and eco-friendly treatments capable of reducing and even eliminating synthetic dye compounds from the environment. Enzymatic approach has attracted much interest recently in the decolorization of textile and other industrially important dyes from wastewater as an alternative strategy to conventional chemical, physical, and biological treatments, which pose serious limitations. In this chapter, the accumulated research data on the potential of the oxidoreductive enzymes—high redox potential peroxidases (lignin peroxidase [LiP], EC 1.11.1.14; manganese peroxidase [MnP], EC 1.11.1.13; dye decolorizing peroxidase [DyP], EC 1.11.1.19; and versatile peroxidases [VP], EC 1.11.1.16), laccases (benzenediol–oxygen oxidoreductase, EC 1.10.3.2), polyphenol oxidases (EC 1.14.18.1), and azoreductases (azobenzene reductases, EC 1.7.1.6)—that have been exploited in the decolorization and degradation of synthetic dyes are presented. An overview of enzyme technology, including the importance of redox mediators for enhanced range of substrates and efficiency of degradation, current biodegradation applications, and suggestions to overcome the limitations to these proteins’ large scale and efficient use, is made. Different strategies currently being used and future prospects for the potential use of genetic engineering techniques to improve the performance of these oxidoreductases in terms of stability, selectivity, and catalytic activity in dye bioremediation technologies are also explored.

Published
2015
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