Automating X-ray Fluorescence Analysis for Rapid Astrobiology Surveys [0.03%]
用于快速天体生物学考察的X射线荧光分析自动化技术
David R Thompson,David T Flannery,Ravi Lanka et al.
David R Thompson et al.
A new generation of planetary rover instruments, such as PIXL (Planetary Instrument for X-ray Lithochemistry) and SHERLOC (Scanning Habitable Environments with Raman Luminescence for Organics and Chemicals) selected for the Mars 2020 missio...
Enhanced Radiation Resistance of Methanosarcina soligelidi SMA-21, a New Methanogenic Archaeon Isolated from a Siberian Permafrost-Affected Soil in Direct Comparison to Methanosarcina barkeri [0.03%]
与梅索萨尔卡细菌直接比较新分离的产甲烷古菌梅索萨尔卡索吉尔迪 SMA-21 增强了辐射抗性
Daria Morozova,Ralf Moeller,Petra Rettberg et al.
Daria Morozova et al.
Permafrost-affected soils are characterized by a high abundance and diversity of methanogenic communities, which are considered suitable model organisms for potential life on Mars. Methanogens from Siberian permafrost have been proven to be...
The Survival and Resistance of Halobacterium salinarum NRC-1, Halococcus hamelinensis, and Halococcus morrhuae to Simulated Outer Space Solar Radiation [0.03%]
极端紫外线和模拟宇宙射线辐射对盐_halobacterium_salinarum_nrc-1_、_halococcus_hamelinensis_及_halococcus_morrhuae_的灭活作用
S Leuko,C Domingos,A Parpart et al.
S Leuko et al.
Solar radiation is among the most prominent stress factors organisms face during space travel and possibly on other planets. Our analysis of three different halophilic archaea, namely Halobacterium salinarum NRC-1, Halococcus morrhuae, and ...
Searching for Clever Life [0.03%]
寻找聪明的生命
Seth Shostak
Seth Shostak
Stable Carbon Isotope Fractionation during Bacterial Acetylene Fermentation: Potential for Life Detection in Hydrocarbon-Rich Volatiles of Icy Planet(oid)s [0.03%]
细菌乙炔发酵过程中的稳定碳同位素分馏：在富含烃类挥发物的冰行星(oid)上寻找生命的潜力
Laurence G Miller,Shaun M Baesman,Ronald S Oremland
Laurence G Miller
We report the first study of stable carbon isotope fractionation during microbial fermentation of acetylene (C2H2) in sediments, sediment enrichments, and bacterial cultures. Kinetic isotope effects (KIEs) averaged 3.7 ± 0.5‰ for slurries...
A Hierarchical System for Evaluating the Biogenicity of Metavolcanic- and Ultramafic-Hosted Microalteration Textures in the Search for Extraterrestrial Life [0.03%]
寻找地外生命的层流系统评估 metavolcanic 和 ultramafic 宿主微蚀变纹理的生物性
Nicola McLoughlin,Eugene G Grosch
Nicola McLoughlin
The low-temperature alteration of submarine volcanic glasses has been argued to involve the activity of microorganisms, and analogous fluid-rock-microbial-mediated alteration has also been postulated on Mars. However, establishing the exten...
A Test of the Biogenicity Criteria Established for Microfossils and Stromatolites on Quaternary Tufa and Speleothem Materials Formed in the "Twilight Zone" at Caerwys, UK [0.03%]
英国威尔士Caerwys“暮光地带”第四纪结核赤土和钟乳石材料的生物成因标准检验试验
A T Brasier,M R Rogerson,R Mercedes-Martin et al.
A T Brasier et al.
The ability to distinguish the features of a chemical sedimentary rock that can only be attributed to biology is a challenge relevant to both geobiology and astrobiology. This study aimed to test criteria for recognizing petrographically th...
Tracing Biosignature Preservation of Geothermally Silicified Microbial Textures into the Geological Record [0.03%]
地球热液硅化石微生物织构的生物标志化合物保存研究及其在地质记录中的应用
Kathleen A Campbell,Bridget Y Lynne,Kim M Handley et al.
Kathleen A Campbell et al.
New Zealand and Argentine (Late Jurassic-Recent) siliceous hot-spring deposits (sinter) reveal preservation pathways of environmentally controlled, microbe-dominated sedimentary facies over geological time scales. Texturally distinctive, la...
Ultrastructural Heterogeneity of Carbonaceous Material in Ancient Cherts: Investigating Biosignature Origin and Preservation [0.03%]
古代燧石中碳质物质的超微结构异质性：探究生物标志物起源和保存状态
Yuangao Qu,Anders Engdahl,Shixing Zhu et al.
Yuangao Qu et al.
Opaline silica deposits on Mars may be good target sites where organic biosignatures could be preserved. Potential analogues on Earth are provided by ancient cherts containing carbonaceous material (CM) permineralized by silica. In this stu...
Does a Heavy Fe-Isotope Composition of Akilia Quartz-Amphibole-Pyroxene Rocks Necessitate a BIF Origin? [0.03%]
重Fe同位素组成的Akilia石英角闪岩辉长岩是否一定来源于条带状铁建造（BIF）？
M J Whitehouse,R Schoenberg,C M Fedo et al.
M J Whitehouse et al.
The age and origin of the quartz-amphibole-pyroxene (qap) gneiss from the island of Akilia, southern West Greenland, have been the subject of intense debate since the light C-isotope composition of graphite inclusions in apatite was interpr...