从模拟泰坦大气中形成有机化合物：卡西尼任务的视角

Formation of organic compounds from simulated Titan atmosphere: perspectives of the Cassini mission.

作者信息

Koike Toshiyuki, Kaneko Takeo, Kobayashi Kensei, Miyakawa Shin, Takano Yoshinori

机构信息

Department of Chemistry and Biotechnology, Yokohama National University.

出版信息

Biol Sci Space. 2003 Oct;17(3):188-9.

PMID:14676367

Abstract

Gas mixtures of methane and nitrogen were subjected to proton irradiation (PI), gamma irradiation (GI), UV irradiation (UV) or spark discharges (SD), and the products were analyzed to compare possible energy sources for synthesis of organics in Titan. SD mainly gave unsaturated hydrocarbons, while PI gave saturated hydrocarbons. N-containing organics were detected in PI, GI and SD, but not in UV. The formers yielded amino acids after acid-hydrolysis of solid phase products (tholin). Comparison of the present results with those by Cassini-Huygens [correction of Heygens] mission will make it possible to prove major energy sources for organic synthesis in Titan atmosphere.

摘要

将甲烷和氮气的气体混合物进行质子辐照（PI）、伽马辐照（GI）、紫外线辐照（UV）或火花放电（SD），并对产物进行分析，以比较泰坦上合成有机物的可能能量来源。火花放电主要产生不饱和烃，而质子辐照产生饱和烃。在质子辐照、伽马辐照和火花放电中检测到含氮有机物，但在紫外线辐照中未检测到。前三者在对固相产物（索林）进行酸水解后产生了氨基酸。将本研究结果与卡西尼 - 惠更斯号任务的结果进行比较，将有可能证明泰坦大气中有机合成的主要能量来源。