Results 221 to 230 of about 11,414 (233)
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Science, 1999
The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ 56 Fe values of +0.9 to −1.6 per mil). In contrast, the 56 Fe/ 54 Fe of Fe-bearing phases in igneous rocks from Earth
Brian L. Beard +5 more
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The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ 56 Fe values of +0.9 to −1.6 per mil). In contrast, the 56 Fe/ 54 Fe of Fe-bearing phases in igneous rocks from Earth
Brian L. Beard +5 more
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2011
Biosignatures are morphological, chemical (organic, elemental and/or mineral), and isotopic traces of organisms preserved in minerals, sediments, and rocks. They represent the physical presence of the organisms as well as evidence of their metabolic activities and metabolites.
Westall F., CAVALAZZI, BARBARA
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Biosignatures are morphological, chemical (organic, elemental and/or mineral), and isotopic traces of organisms preserved in minerals, sediments, and rocks. They represent the physical presence of the organisms as well as evidence of their metabolic activities and metabolites.
Westall F., CAVALAZZI, BARBARA
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SPIE Proceedings, 2005
As technology advances, we have more possibilities to search for past life, looking for biosignatures in the rock record. Even when these biosignatures can be chemical compounds, the irrevocable evidence of past life would be life itself preserved as fossils.
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As technology advances, we have more possibilities to search for past life, looking for biosignatures in the rock record. Even when these biosignatures can be chemical compounds, the irrevocable evidence of past life would be life itself preserved as fossils.
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Astrobiology, 2003
A major goal of NASA's Origins Program is to find habitable planets around other stars and determine which might harbor life. Determining whether or not an extrasolar planet harbors life requires an understanding of what spectral features (i.e., biosignatures) might result from life's presence.
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A major goal of NASA's Origins Program is to find habitable planets around other stars and determine which might harbor life. Determining whether or not an extrasolar planet harbors life requires an understanding of what spectral features (i.e., biosignatures) might result from life's presence.
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Physical invariants of biosignatures
Physics Letters A, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Exoplanetary Biosignatures for Astrobiology
2018Since life evolved on our planet there have been subtle interplays between biology and Earth System Components (atmosphere-lithosphere-ocean-interior). Life, for example, can impact weathering rates which, in turn, influence climate stabilizing feedback cycles on Earth.
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2018
In this chapter, mhealth solutions for remote monitoring of ex vivo biosignatures is initially discussed in lieu of instrumentation. A summary of versatile sensor technologies that incorporate numerous features and the recommended methods for the critical steps of data acquisition in real-world settings is presented.
Christopher R. Lowe +1 more
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In this chapter, mhealth solutions for remote monitoring of ex vivo biosignatures is initially discussed in lieu of instrumentation. A summary of versatile sensor technologies that incorporate numerous features and the recommended methods for the critical steps of data acquisition in real-world settings is presented.
Christopher R. Lowe +1 more
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Chemical Biosignatures at the Origins
2018Chemists searching for chemical biosignatures begin to define the chemical prerequisites for the emergence of life, a process based on organized molecules capable of self-reproduction and also with the capability of evolution. It is generally accepted that these prerequisites are liquid water and organic molecules, i.e.
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Biosignatures in thrombotic disorders
Journal of Thrombosis and Thrombolysis, 2006openaire +3 more sources