FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W104051875> ?p ?o ?g. }

• W104051875 abstract "Extraterrestrial Permafrost is a common phenomenon within the solar system and the main centre of extraterrestrial research in Astrobiology, with focus on searching for extraterrestrial life. Mars is considered as one of the most similar planets to Earth of our solar system, even if it is characterized by extreme coldness and dryness today. When living conditions on Mars were similar to that on early Earth, the evolution of microorganisms had already started on Earth. Prokaryotic microfossils, found in early Archaean rocks, implies that the earliest life forms between 3.5 3.8 Ga ago. Therefore it is legitimate to assume that life also emerged on early Mars as on early Earth.The newest ESA Mission to Mars (Mars Express) determined water on Mars, which is fundamental requirement for life initiation. Further investigations for the first time demonstrated the presence of methane in Mars atmosphere, which could be only of active volcanic or biological origin. Data obtained by the Mars Express probe show that water vapour and methane gas are concentrated in the same regions of the Martian atmosphere. This finding may have important implications for the possibility that microbial life could exist on Mars.Martian life, if present, must have adapted to drastically changing environmental conditions. One possibility of survival might be subsurface lithoautotrophic ecosystems, comparable to permafrost on Earth, in which microorganisms have survived for million years.Methanogenic Archaea, which colonised terrestrial permafrost, are highly specialized organisms from the view point of metabolism. The capability these organisms to lithoautotrophic growth, whereby methane is gained by the oxidation of hydrogen and carbon dioxide is the only carbon source under strictly anaerobic conditions, tolerance to low temperatures and survival under extreme conditions of permafrost for several millions of years make methanogens to one of the most suitable keystone organism for the investigation of possible Martian life.The goal of this work was to examine the tolerances of these organisms under unfavourable life conditions of terrestrial or extraterrestrial permafrost. The borders of growth influenced by desiccation, temperature extremes and high salt concentration were analyzed for the organisms in pure cultures as well in their natural environment of Siberian permafrost.The investigation area is situated on Samojlov Island in the Lena Delta, Siberia. The influence of high salt concentrations in combination with low incubation temperatures was determined. Methanogenic Archaea revealed methane production under in situ conditions (at temperatures between 0 and 2°C) and salt concentration up to 6 mol with a rate about 0.02-0.09 nmol CH4 h-1 g-1. Further laboratory tests with isolated cultures confirm those results. Incubation of pure cultures with different salt concentration (from 0,1 to 6 mol) showed a significant methane production rate even at salt concentration 6 mol (0.013-0.022 nmol CH4 h-1 ) The ascendancy of temperature on the experiments was also analyzed. Methanogenic Archaea showed better adaptation to high salt concentration at low temperatures, 4°C, with methane production rate 0.019-0.026 nmol CH4 h-1 as at incubation temperature 28°C (0.012-0.014 nmol CH4 h-1). Consideration of methanogenic Archaea natural environments makes those results conclusive." @default.
• W104051875 created "2016-06-24" @default.
• W104051875 creator A5086306768 @default.
• W104051875 creator A5087589833 @default.
• W104051875 date "2005-01-01" @default.
• W104051875 modified "2023-10-15" @default.
• W104051875 title "Microbial Life under Extreme Environments of Permafrost: Tolerance Limits of Methanogenic Archaea as Keystone Organisms for the Investigation of Extraterrestrial Life." @default.
• W104051875 hasPublicationYear "2005" @default.
• W104051875 type Work @default.
• W104051875 sameAs 104051875 @default.
• W104051875 citedByCount "0" @default.
• W104051875 crossrefType "journal-article" @default.
• W104051875 hasAuthorship W104051875A5086306768 @default.
• W104051875 hasAuthorship W104051875A5087589833 @default.
• W104051875 hasConcept C121332964 @default.
• W104051875 hasConcept C127313418 @default.
• W104051875 hasConcept C1276947 @default.
• W104051875 hasConcept C15098985 @default.
• W104051875 hasConcept C151730666 @default.
• W104051875 hasConcept C153294291 @default.
• W104051875 hasConcept C18903297 @default.
• W104051875 hasConcept C1965285 @default.
• W104051875 hasConcept C205649164 @default.
• W104051875 hasConcept C2776744078 @default.
• W104051875 hasConcept C2778172956 @default.
• W104051875 hasConcept C2778600265 @default.
• W104051875 hasConcept C39432304 @default.
• W104051875 hasConcept C45095769 @default.
• W104051875 hasConcept C523546767 @default.
• W104051875 hasConcept C550995028 @default.
• W104051875 hasConcept C65440619 @default.
• W104051875 hasConcept C83260615 @default.
• W104051875 hasConcept C84795859 @default.
• W104051875 hasConcept C86803240 @default.
• W104051875 hasConcept C87355193 @default.
• W104051875 hasConcept C98536072 @default.
• W104051875 hasConceptScore W104051875C121332964 @default.
• W104051875 hasConceptScore W104051875C127313418 @default.
• W104051875 hasConceptScore W104051875C1276947 @default.
• W104051875 hasConceptScore W104051875C15098985 @default.
• W104051875 hasConceptScore W104051875C151730666 @default.
• W104051875 hasConceptScore W104051875C153294291 @default.
• W104051875 hasConceptScore W104051875C18903297 @default.
• W104051875 hasConceptScore W104051875C1965285 @default.
• W104051875 hasConceptScore W104051875C205649164 @default.
• W104051875 hasConceptScore W104051875C2776744078 @default.
• W104051875 hasConceptScore W104051875C2778172956 @default.
• W104051875 hasConceptScore W104051875C2778600265 @default.
• W104051875 hasConceptScore W104051875C39432304 @default.
• W104051875 hasConceptScore W104051875C45095769 @default.
• W104051875 hasConceptScore W104051875C523546767 @default.
• W104051875 hasConceptScore W104051875C550995028 @default.
• W104051875 hasConceptScore W104051875C65440619 @default.
• W104051875 hasConceptScore W104051875C83260615 @default.
• W104051875 hasConceptScore W104051875C84795859 @default.
• W104051875 hasConceptScore W104051875C86803240 @default.
• W104051875 hasConceptScore W104051875C87355193 @default.
• W104051875 hasConceptScore W104051875C98536072 @default.
• W104051875 hasLocation W1040518751 @default.
• W104051875 hasOpenAccess W104051875 @default.
• W104051875 hasPrimaryLocation W1040518751 @default.
• W104051875 hasRelatedWork W1485869894 @default.
• W104051875 hasRelatedWork W157003430 @default.
• W104051875 hasRelatedWork W1750663772 @default.
• W104051875 hasRelatedWork W1965783131 @default.
• W104051875 hasRelatedWork W2000350104 @default.
• W104051875 hasRelatedWork W2001933253 @default.
• W104051875 hasRelatedWork W2005699987 @default.
• W104051875 hasRelatedWork W2037457994 @default.
• W104051875 hasRelatedWork W2072591971 @default.
• W104051875 hasRelatedWork W2082980305 @default.
• W104051875 hasRelatedWork W2088856953 @default.
• W104051875 hasRelatedWork W2263324635 @default.
• W104051875 hasRelatedWork W2278322433 @default.
• W104051875 hasRelatedWork W2847219759 @default.
• W104051875 hasRelatedWork W3088014173 @default.
• W104051875 hasRelatedWork W3154963593 @default.
• W104051875 hasRelatedWork W656889736 @default.
• W104051875 hasRelatedWork W824964900 @default.
• W104051875 hasRelatedWork W846415656 @default.
• W104051875 hasRelatedWork W89814252 @default.
• W104051875 isParatext "false" @default.
• W104051875 isRetracted "false" @default.
• W104051875 magId "104051875" @default.
• W104051875 workType "article" @default.