Analysis and survival of amino acids in Martian regolith analogs
Analysis and survival of amino acids in Martian regolith analogs
复制标题
火星风化层类似物中氨基酸的分析和存活
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
P. Ehrenfreund
中科院分区：
文献类型：
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作者：
J. Garry;Inge Loes Kate;Z. Martins;P. Nørnberg;P. Ehrenfreund
摘要：我们研究了火星土壤的两个类似物JSC Mars‐1和Salten Skov的天然氨基酸组成。已经建造了一个火星模拟室，用于将这些类似物的样品暴露在类似于火星表面低纬度地区的温度和光照条件下。使用高效液相色谱法（HPLC）检查了模拟条件的影响。在真空中暴露于高能紫外线（UV）似乎会导致材料中某些氨基酸的浓度适度增加，这被解释为微生物降解的结果。低温的影响表明，凝结水在土壤上的增加导致了氨基酸的破坏，支持了涉及H2O的反应性化学过程在火星土壤中起作用的想法。我们讨论了紫外线辐射，低温和气态CO2对火星土壤类似物的内在氨基酸组成的影响，并描述了一个简单的模型的帮助下，这些研究如何适合在火星上的生命探测的框架内，选择和使用火星风化层类似物在行星研究的实际任务。
Abstract— We have investigated the native amino acid composition of two analogs of Martian soil, JSC Mars‐1 and Salten Skov. A Mars simulation chamber has been built and used to expose samples of these analogs to temperature and lighting conditions similar to those found at low latitudes on the Martian surface. The effects of the simulated conditions have been examined using high‐performance liquid chromatography (HPLC). Exposure to energetic ultraviolet (UV) light in vacuum appears to cause a modest increase in the concentration of certain amino acids within the materials, which is interpreted as resulting from the degradation of microorganisms. The influence of low temperatures shows that the accretion of condensed water on the soils leads to the destruction of amino acids, supporting the idea that reactive chemical processes involving H2O are at work within the Martian soil. We discuss the influence of UV radiation, low temperatures, and gaseous CO2 on the intrinsic amino acid composition of Martian soil analogs and describe, with the help of a simple model, how these studies fit within the framework of life detection on Mars and the practical tasks of choosing and using Martian regolith analogs in planetary research.
影响因子：
11.4
作者：
Southworth, BA;Voelker, BM
通讯作者：
Voelker, BM