Results 11 to 20 of about 214 (86)

Hydrostatic and osmotic pressure study of the hairpin ribozyme. [PDF]

open access: yes, 2006
The recent discovery of numerous catalytically active RNAs in various living species as well as the in vitro selection of a large series of RNA aptamers able to bind specifically various molecules such as metabolites and co-factors, emphasize the ...
Heams, Thomas   +4 more
core   +3 more sources

Vers une vie plurielle

open access: yesCahiers François Viète, 2003
On Earth, the transition from matter to life took place with chemical systems capable of self-reproduction and evolution. Two avenues are being explored to understand this transition: the synthesis of artificial life in a test tube and the search for a ...
André Brack
doaj   +1 more source

Phobos LIFE (Living Interplanetary Flight Experiment) [PDF]

open access: yes, 2019
The Planetary Society's Phobos Living Interplanetary Flight Experiment (Phobos LIFE) flew in the sample return capsule of the Russian Federal Space Agency's Phobos Grunt mission and was to have been a test of one aspect of the hypothesis that life can ...
Berger, Thomas,   +16 more
core   +1 more source

La pluridimensionnalité du concept. Approche terminologique du domaine de la spatiologie [PDF]

open access: yes, 2008
À partir de l’analyse de plusieurs termes se rapportant au domaine de la spatiologie, dans des langues aussi différentes que l’anglais et le français d’une part et l’arabe d’autre part, nous nous proposons de démontrer l’importance de la notion de ...
Baraké, Rima
core   +1 more source

Les origines de la vie sur la Terre : un problème historique

open access: yesCahiers François Viète, 2003
The history of work on the origins of life, since the end of the debate between Louis Pasteur and Félix Pouchet in the 1860s, can be divided into two main periods: until the middle of the 20th century, most of the work consisted of the formulation of ...
Stéphane Tirard
doaj   +1 more source

Le “travail épique” de la science-fiction : les histoires du futur de Laurent Genefort [PDF]

open access: yes, 2023
À partir de la notion de “travail épique” (F. Goyet, Penser sans concept : fonctions de l’épopée guerrière, 2006), cet article postule une parenté fonctionnelle entre épopée et science-fiction, en étudiant en particulier trois romans de Laurent Genefort,
Bréan, Simon
core   +1 more source

Implications of in situ calcification for photosynthesis in a ~3.3 Ga-old microbial biofilm from the Barberton greenstone belt, South Africa [PDF]

open access: yes, 2011
International audienceTiming the appearance of photosynthetic microorganisms is crucial to understanding the evolution of life on Earth. The ability of the biosphere to use sunlight as a source of energy (photoautotrophy) would have been essential for ...
Andreazza, Caroline   +19 more
core   +3 more sources

Current exobiology missions to Mars. Importance for geoscience and search of Life beyond Earth [PDF]

open access: yes, 2021
Relevantnost tématu bakalářské práce "Současné exobiologické mise k Marsu" je spojen s vědomím podobnosti některých procesů na Zemi a Marsu. Mars se, na rozdíl od planet Sluneční soustavy, alespoň částečně podobá naší planetě několika charakteristikami ...
Ovcharenko, Vladyslav
core  

Ni+ reactions with aminoacetonitrile, a potential prebiological precursor of glycine [PDF]

open access: yes, 2008
The gas-phase reactions between Ni+ (2D5/2) and aminoacetonitrile, a molecule of prebiological interest as possible precursor of glycine, have been investigated by means of mass spectrometry techniques.
Amunugama   +52 more
core   +4 more sources

Existentielle Gefahren für die Menschheit als Gegenstand für die Zukunftsforschung [PDF]

open access: yes, 2021
Untersuchungen zu existentiellen Gefahren für die Menschheit sind bislang eine Seltenheit. Mit der vorliegenden Publikation wird der Versuch unternommen, grundlegende Konturen dieses Forschungsfelds zu umreißen.
Gerhold, Lars, Steinmüller, Karheinz
core   +2 more sources

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