カワムラ　クニオ   KAWAMURA Kunio   川村　邦男    所属   広島修道大学  人間環境学部    職種   教授
言語種別	英語
発行・発表の年月	2003/09
形態種別	その他の研究業績
査読	査読有り
標題	Is the RNA world hypothesis consistent with the hydrothermal origin of life?
執筆形態	単著
掲載誌名	Geochimca et Cosmochimca Acta, Suppl.
掲載区分	国外
巻・号・頁	pp.208-208
概要	Discovery of the catalytic activity of RNA has suggested that RNA molecules played important roles in the emergence of life. However, the RNA world hypothesis seems to be in conflict with hydrothermal origins of life, since RNA is labile at high temperatures. Few studies have been done on the RNA world from viewpoints of the hydrothermal origin of life, since the real-time observation of hydrothermal reactions was difficult. As a solution, we have developed a new monitoring method for hydrothermal reactions that enables real-time monitoring within 0.002 - 150 s at 315 C. On the other hand, kinetics on the temperature dependence of the prebiotic formation of RNA has been investigated to elucidate the reasons that RNAs do not form easily at high temperatures. The possibility of an RNA world under the hydrothermal conditions is going to be discussed.