Abstract：
UNLABELLED:An approach to the origin of life, focused on the property of entities capable of reproducing themselves far from equilibrium, has been developed recently. Independently, the possibility of the emergence of life in the hydrothermal systems possibly present in the deep oceans below the frozen crust of some of the moons of Jupiter and Saturn has been raised. The present report is aimed at investigating the mutual compatibility of these alternative views. In this approach, the habitability concept deduced from the limits of life on Earth is considered to be inappropriate with regard to emerging life due to the requirement for an energy source of sufficient potential (equivalent to the potential of visible light). For these icy moons, no driving force would have been present to assist the process of emergence, which would then have had to rely exclusively on highly improbable events, thereby making the presence of life unlikely on these Solar System bodies, that is, unless additional processes are introduced for feeding chemical systems undergoing a transition toward life and the early living organisms. KEY WORDS:Icy moon-Bioenergetics-Chemical evolution-Habitability-Origin of life. Astrobiology 16, 328-334.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Pascal Rdoi
10.1089/ast.2015.1412subject
Has Abstractpub_date
2016-05-01 00:00:00pages
328-34issue
5eissn
1531-1074issn
1557-8070journal_volume
16pub_type
杂志文章相关文献
ASTROBIOLOGY文献大全abstract：:In June 2003, the geochemical composition of geothermal fluids was determined at 9 sites in the Vulcano hydrothermal system, including sediment seeps, geothermal wells, and submarine vents. Compositional data were combined with standard state reaction properties to determine the overall Gibbs free energy (DeltaG(r) ) ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2007.0128
更新日期：2007-12-01 00:00:00
abstract：:A phylogenomic dating approach was used to identify potential age constraints for multiple archaeal groups, many of which have no fossil, isotopic, or biomarker record. First, well-resolved phylogenetic trees were inferred with the use of multiple gene sequences obtained from whole genome sequences. Next, the ability ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2008.0247
更新日期：2009-03-01 00:00:00
abstract：:Over the past few years a series of searches for interstellar radio beacons have taken place using the Parkes radio telescope. Here we report hitherto unpublished results from a search for optical beacons from 60 solar-type stars using the Perth-Lowell telescope. We discuss the significance of the null results from th...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110702762027880
更新日期：2002-10-01 00:00:00
abstract：:The emergence of an RNA entity capable of synthesizing peptides was a key prebiotic development. It is hypothesized that a precursor of the modern ribosomal exit tunnel was associated with this RNA entity (e.g., "protoribosome" or "bonding entity") from the earliest time and played an essential role. Various compounds...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2011.0692
更新日期：2012-01-01 00:00:00
abstract：:The discovery by NASA's Cassini mission at Saturn in 2005 of a large plume of material erupting from the south polar terrain of Enceladus, sourced within a subsurface ocean of salty liquid water laced with organic compounds, has brought together scientists from a diverse range of disciplines over the last decade to ev...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1711
更新日期：2017-09-01 00:00:00
abstract：:Dryness is one of the main environmental challenges to microbial survival. Understanding the threshold of microbial tolerance to extreme dryness is relevant to better constrain the environmental limits of life on Earth and critically evaluate long-term habitability models of Mars. Biomolecular proxies for microbial ad...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1705
更新日期：2018-07-01 00:00:00
abstract：:The aim of this study was to examine team functioning within the context of the AMADEE 18 Mars analog project, which took place in Oman in the winter of 2018. Five "Analog Astronauts" participated in this study. Each completed measures of individual-level variables, including demographics and personality, before the s...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2019.2035
更新日期：2020-11-01 00:00:00
abstract：:Ultraviolet (UV) irradiation on the surface of Mars is an important factor that affects the survivability of microorganisms on Mars. The possibility of martian brines made from Fe2(SO4)3, MnSO4, and MgSO4 salts providing a habitable niche on Mars via attenuation of UV radiation was investigated on the bacteria Bacillu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2020.2285
更新日期：2020-11-25 00:00:00
abstract：:Chloride-bearing deposits and phyllosilicates-bearing units are widely distributed in the southern highlands of Mars, but these phases are rarely found together in fluviolacustrine environments. The study of the coexistence of these minerals can provide important insights into geochemistry, water activity, and ultimat...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1757
更新日期：2018-08-01 00:00:00
abstract：:Cyanobacteria and similar organisms produced most of the oxygen found in Earth's atmosphere, which implies that early photosynthetic organisms would have lived in an atmosphere that was rich in CO2 and poor in O2. We investigated the tolerance of several cyanobacteria to very high (>20 kPa) concentrations of atmospher...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2005.5.66
更新日期：2005-02-01 00:00:00
abstract：:The primary objective of NASA's Mars Science Laboratory (MSL) mission, which will launch in 2011, is to characterize the habitability of a site on Mars through detailed analyses of the composition and geological context of surface materials. Within the framework of established mission goals, we have evaluated the valu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2010.0491
更新日期：2010-09-01 00:00:00
abstract：:The γ-radiolysis of fullerenes (C60 and C70) was performed to investigate the role of fullerenes as a carbon source in building organic molecules in astrophysical ice analog media. Mass spectrometric analyses and the sequential collision-induced dissociation processes enabled us to determine the plausible chemical str...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2018.1905
更新日期：2019-07-01 00:00:00
abstract：:Small-scale terracing (microterracettes) is a surface geomorphic feature that recurs under a range of environmental settings, such as those existing in high to low temperature geothermal springs and evaporitic environments, through the single or combined action of physicochemical agents and microbiological processes. ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1646
更新日期：2018-10-01 00:00:00
abstract：:Viability rates were determined for microbial populations of Escherichia coli and Deinococcus radiodurans under the environmental stresses of low temperature (-35 degrees C), low-pressure conditions (83.3 kPa), and ultraviolet (UV) irradiation (37 W/m(2)). During the stress tests the organisms were suspended in saltwa...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2006.6.332
更新日期：2006-04-01 00:00:00
abstract：:We describe a continuous high-pressure flow reactor designed to simulate the unforced convective interaction of hydrothermal solutions and ocean waters with submarine crust on early Earth-conditions appropriate to those that may have led to the onset of life. The experimental operating conditions are appropriate for i...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2009.0456
更新日期：2010-10-01 00:00:00
abstract：:We critically investigate some evolutionary aspects of the famous Drake equation, which is usually presented as the central guide for research on extraterrestrial intelligence. It is shown that the Drake equation tacitly relies on unverified assumptions on both the physicochemical history of our galaxy and the propert...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110704323175160
更新日期：2004-07-01 00:00:00
abstract：:Understanding microbial diversity in spacecraft assembly clean rooms is of major interest with respect to planetary protection considerations. A coordinated screening of different clean rooms in Europe and South America by three German institutes [Deutsches Zentrum für Luft- und Raumfahrt (DLR), Leibniz-Institut DSMZ-...
journal_title：Astrobiology
pub_type： 杂志文章,评审
doi：10.1089/ast.2013.1024
更新日期：2013-12-01 00:00:00
abstract：:The discovery of potentially habitable planets around the ultracool dwarf star Trappist-1 naturally poses the question: could Trappist-1 planets be home to life? These planets orbit very close to the host star and are most susceptible to the UV radiation emitted by the intense and frequent flares of Trappist-1. Here, ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2019.2126
更新日期：2020-12-01 00:00:00
abstract：:We review the in situ geochronology experiments conducted by the Mars Science Laboratory mission's Curiosity rover to understand when the Gale Crater rocks formed, underwent alteration, and became exposed to cosmogenic radiation. These experiments determined that the detrital minerals in the sedimentary rocks of Gale ...
journal_title：Astrobiology
pub_type： 杂志文章,评审
doi：10.1089/ast.2018.1871
更新日期：2019-11-01 00:00:00
abstract：:This review of material relevant to the Conference on Biosignature Preservation and Detection in Mars Analog Environments summarizes the meeting materials and discussions and is further expanded upon by detailed references to the published literature. From this diverse source material, there is a detailed discussion o...
journal_title：Astrobiology
pub_type： 杂志文章,评审
doi：10.1089/ast.2016.1627
更新日期：2017-04-01 00:00:00
abstract：:We highlight the role of COSPAR and the scientific community in defining and updating the framework of planetary protection. Specifically, we focus on Mars "Special Regions," areas where strict planetary protection measures have to be applied before a spacecraft can explore them, given the existence of environmental c...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2016.1472
更新日期：2016-02-01 00:00:00
abstract：:The emergence of chirality in enantioselective autocatalysis for compounds unable to transform according to the Frank-like reaction network is discussed with respect to the controversial limited enantioselectivity (LES) model composed of coupled enantioselective and non-enantioselective autocatalyses. The LES model ca...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2012.0904
更新日期：2013-02-01 00:00:00
abstract：UNLABELLED:We developed a prototype instrument called the Standoff Biofinder, which can quickly locate biological material in a 500 cm(2) area from a 2 m standoff distance with a detection time of 0.1 s. All biogenic materials give strong fluorescence signals when excited with UV and visible lasers. In addition, the lu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1400
更新日期：2016-09-01 00:00:00
abstract：:Formation of microtubules in volcanic glass from subsurface environments has been widely attributed to in situ activity of micro-organisms, but evidence directly linking those structures to biological processes remains lacking. Investigations into the alternative possibility of abiotic tubule formation have been limit...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1811
更新日期：2019-01-01 00:00:00
abstract：:Polymeric compounds similar to oligonucleotides are relevant to the origin of life and particularly to the concept of an RNA world. Although short oligomers of RNA can be synthesized nonenzymatically under laboratory conditions by second-order reactions in concentrated solutions, there is no consensus on how these pol...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/15311070152757465
更新日期：2001-10-01 00:00:00
abstract：:This study presents an assay for the detection and quantification of soil metal superoxides and peroxides in regolith and soil. The O2 release (OR) assay is based on the enzymatic conversion of the hydrolysis products of metal oxides to O2 and their quantification by an O2 electrode based on the stoichiometry of the i...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1345
更新日期：2016-02-01 00:00:00
abstract：:Evaporation of silica-rich geothermal waters is one of the main abiotic drivers of the formation of silica sinters around hot springs. An important role in sinter structural development is also played by the indigenous microbial communities, which are fossilized and eventually encased in the silica matrix. The combina...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2012.0887
更新日期：2013-02-01 00:00:00
abstract：:Astrobiology is an inherently interdisciplinary area of study, demanding communication across multiple fields: astronomy, geochemistry, planetary science, and so on. Successful communication requires that researchers be aware of the basic findings, open questions, and tools and techniques of allied fields and possess ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1710
更新日期：2018-03-01 00:00:00
abstract：:Raman spectroscopy is being adopted as a nondestructive instrumentation for the robotic exploration of Mars to search for traces of life in the geological record. Here, miniaturized Raman spectrometers of two different types equipped with 532 and 785 nm lasers for excitation, respectively, were compared for the detect...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2012.0879
更新日期：2012-12-01 00:00:00
abstract：:The NASA Astrobiology Roadmap provides guidance for research and technology development across the NASA enterprises that encompass the space, Earth, and biological sciences. The ongoing development of astrobiology roadmaps embodies the contributions of diverse scientists and technologists from government, universities...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110703769016299
更新日期：2003-07-01 00:00:00
