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Your search keyword '"Abiogenesis"' showing total 3 results
Start Over Descriptor "Abiogenesis" Language portuguese
3 results on '"Abiogenesis"'

1. Os semimetais na origem e evolução da vida

Author

Manuel Aureliano, João J. R. Fraústo da Silva, Pedro A. Nolasco, and Jose A. Silva

Subjects
Boro, Silicon, Chemistry, RNA world, chemistry.chemical_element, silicon, Nanotechnology, General Chemistry, lcsh:Chemistry, RNA world hypothesis, Nmr-spectroscopy, Bottom-up synthesis, lcsh:QD1-999, Abiogenesis, Environmental chemistry, Borate minerals, Gene-expression, Metalloid, Sugar silicates, Amino-acids, Boron, boron, Prebiotic synthesis, Hydrogen-cyanide, Cold origin
Abstract

Submitted by Manuel Aureliano (maalves@ualg.pt) on 2012-07-02T09:49:30Z No. of bitstreams: 1 Aureliano_QNova_2012.pdf: 374931 bytes, checksum: c386801e30ae36d9fee2d52bc8371ec4 (MD5) Approved for entry into archive by Merja Muzavor(mmuzavor@ualg.pt) on 2012-07-02T11:12:02Z (GMT) No. of bitstreams: 1 Aureliano_QNova_2012.pdf: 374931 bytes, checksum: c386801e30ae36d9fee2d52bc8371ec4 (MD5) Made available in DSpace on 2012-07-02T11:12:02Z (GMT). No. of bitstreams: 1 Aureliano_QNova_2012.pdf: 374931 bytes, checksum: c386801e30ae36d9fee2d52bc8371ec4 (MD5) Previous issue date: 2012

Published
2012

2. Homochiral biomolecular evolution: the origin and the amplification of chirality in life molecules

Author

José Augusto Rodrigues

Subjects
Autocatalysis, handedness, Chemistry, Abiogenesis, Stereochemistry, General Chemistry, Symmetry breaking, Homochirality, Chirality (chemistry), symmetry breaking, origin of life
Abstract

The fact that biologically relevant molecules exist only as one of the two enantiomers is a fascinating example of complete symmetry breaking of chirality and has long intrigued our curiosity. The origin of this selective chirality has remained a fundamental enigma with regard to the origin of life since the time of Pasteur, 160 years ago. The symmetry breaking processes, which include autocatalytic crystallization, asymmetric autocatalysis, spontaneous crystallization, adsorption and polymerization of amino acids on mineral surfaces, provide new insights into the origin of biomolecular homochirality.

Published
2010

3. Origens da vida

Author

Augusto Damineli, Daniel S. C. Damineli, Universidade de São Paulo (USP), and Universidade Estadual Paulista (Unesp)

Subjects
Cultural Studies, History, Sociology and Political Science, Life settlement, Vida, Evolução, Evolution, Perspective (graphical), Context (language use), Origem da vida, Early Earth, Epistemology, Prebiotic chemistry, Life, Abiogenesis, Origin of life, Ancestor
Abstract

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:22:22Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:34:57Z : No. of bitstreams: 1 2-s2.0-34249780557.pdf: 470330 bytes, checksum: b9fb18ce09ef3e434845ea19fb6c0ca5 (MD5) Made available in DSpace on 2014-05-27T11:22:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-01-01 We present a historical perspective about the ideas concerning the origin of life. After displaying the main topics necessary for understanding life's origin, the main characteristics of the present life forms and their relationships are shown, suggesting a common ancestor. The conditions for prebiotic chemistry in terrestrial or interplanetary environments are reviewed. We put in context the arguments about the early origin of replicators versus metabolism. The very narrow window for life settlement in the early Earth is stressed, pointing to the likelihood of life arising in other places in the Universe. Finally, we present the cornerstones of current search for life outside our planet. Departamento de Astronomia Instituto Astronômico e Geofísico Universidade de São Paulo, São Paulo Universidade de São Paulo (USP), São Paulo Universidade Estadual Paulista (Unesp), Rio Claro Universidade Estadual Paulista (Unesp), Rio Claro

Published
2007

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