| Item type |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
Cyanide production by chemical reactions between impactor material and an ambient atmosphere after oblique impacts |
|
言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
| アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
| 著者 |
黒澤, 耕介
関根, 康人
杉田, 精司
大河内, 直彦
石橋, 高
門野, 敏彦
大野, 宗祐
松井, 孝典
Kurosawa, Kosuke
Sekine, Yasuhito
Sugita, Seiji
Ohkouchi, Naohiko
Ishibashi, Ko
Kadono, Toshihiko
Ohno, Sosuke
Matsui, Takafumi
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| 著者所属 |
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東京大学大学院新領域創成科学研究科複雑理工学専攻 |
| 著者所属 |
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東京大学大学院新領域創成科学研究科複雑理工学専攻 |
| 著者所属 |
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東京大学大学院新領域創成科学研究科複雑理工学専攻 |
| 著者所属 |
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海洋研究開発機構地球内部ダイナミクス領域 |
| 著者所属 |
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東京大学大学院理学系研究科地球惑星科学専攻 |
| 著者所属 |
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大阪大学レーザーエネルギー学研究センター |
| 著者所属 |
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岡山大学地球物質科学研究センター |
| 著者所属 |
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東京大学大学院新領域創成科学研究科複雑理工学専攻 |
| 著者所属（英） |
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en |
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Department of Complexity Science and Engineering, Graduate School of Frontier Science, University of Tokyo |
| 著者所属（英） |
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en |
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Department of Complexity Science and Engineering, Graduate School of Frontier Science, University of Tokyo |
| 著者所属（英） |
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en |
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Department of Complexity Science and Engineering, Graduate School of Frontier Science, University of Tokyo |
| 著者所属（英） |
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en |
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Institute for Research on Earth Evolution, Japan agency for Marine-Earth Science and Technology (JAMSTEC)(IFREE) |
| 著者所属（英） |
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en |
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Department of Earth and Planetary Science, University of Tokyo |
| 著者所属（英） |
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en |
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Institute of Laser Engineering, Osaka University |
| 著者所属（英） |
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en |
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Institute for Study of the Earth's Interior, Okayama Univerisity |
| 著者所属（英） |
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en |
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Department of Complexity Science and Engineering, Graduate School of Frontier Science, University of Tokyo |
| 出版者 |
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出版者 |
宇宙航空研究開発機構宇宙科学研究本部 |
| 出版者（英） |
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出版者 |
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) |
| 書誌情報 |
en : Proceedings of the ISAS lunar and planetary symposium
巻 41,
p. 163-167,
発行日 2009
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| 会議概要（会議名, 開催地, 会期, 主催者等）（英） |
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内容記述タイプ |
Other |
|
内容記述 |
The 41st ISAS Lunar and Planetary Symposium (August 6-8, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)) |
| 抄録（英） |
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内容記述タイプ |
Other |
|
内容記述 |
Cyanide compounds are considered as one of the most important molecules in the chemical evolution phase of the origin of life. However, the production process of cyanides in the surface environment of early Earth is still highly uncertain. Recent experimental studies on hypervelocity impacts suggested that carbon-containing projectile efficiently interact with an ambient atmosphere during intense aerodynamic ablation in oblique impacts, leading to the production of CN radicals from carbon contained in the impactors and nitrogen in the ambient atmosphere. Nevertheless, the fate of CN radicals after the production is poorly understood. In this study, we conducted laser ablation experiments within gas mixtures of N2, CO2, and Ar to simulate the formation of the CN radicals by the hypervelocity oblique impacts and subsequent chemical reactions with the gas species in early Earth's atmosphere. We investigated the chemical composition and structure of the products condensed from laser－induced ablation vapors with graphite and cast iron targets using elemental analysis and infrared absorption spectroscopy. Our experimental results show that the amount of total nitrogen in the condensed material strongly depends on the composition of ambient gas mixtures, and reaches ca. 10 wt% in the products using nitrogen gas only. The depths of absorption bands of CN bonds increase with the partial pressure of N2 in ambient gas mixtures increases. These results indicate that laser-induced CN radicals are fixed into condensed products by generating CN bonds in its structure. Our results using cast iron targets also indicate that iron in the laser-induced ablation vapor helps the incorporation of CN radicals into the condensed materials. These experimental results suggest that the interaction between the carbon-containing impactors and the N2 atmosphere may supply complex cyanide compounds as condensed products to the primitive oceans and/or lakes of early Earth, which may played an important role in the origin of life. |
| 内容記述（英） |
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内容記述タイプ |
Other |
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内容記述 |
Physical characteristics: Original contains color illustrations |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12268968 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: AA0064291038 |
