Base de dados : MEDLINE
Pesquisa : G01.060.075.730.700.762 [Categoria DeCS]
Referências encontradas : 8 [refinar]
Mostrando: 1 .. 8   no formato [Detalhado]

página 1 de 1

  1 / 8 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:23580507
[Au] Autor:Kerr RA
[Ti] Título:Lunar and Planetary Science Conference. Snapshots from the meeting.
[So] Source:Science;340(6129):139, 2013 Apr 12.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Marte
Mercúrio (Planeta)
[Mh] Termos MeSH secundário: Cianetos
Meio Ambiente Extraterreno
Cianeto de Hidrogênio
Meteoroides
Astronave
[Pt] Tipo de publicação:NEWS
[Nm] Nome de substância:
0 (Cyanides); 2WTB3V159F (Hydrogen Cyanide)
[Em] Mês de entrada:1304
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130413
[St] Status:MEDLINE
[do] DOI:10.1126/science.340.6129.139-b


  2 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:22499915
[Ti] Título:Lunar and planetary science conference. Icy-hot Mercury's water pinned down in the dark.
[So] Source:Science;336(6078):150, 2012 Apr 13.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Gelo
Mercúrio (Planeta)
[Mh] Termos MeSH secundário: Meio Ambiente Extraterreno
Astronave
Temperatura Ambiente
[Pt] Tipo de publicação:NEWS
[Nm] Nome de substância:
0 (Ice)
[Em] Mês de entrada:1209
[Cu] Atualização por classe:120413
[Lr] Data última revisão:
120413
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:120414
[St] Status:MEDLINE
[do] DOI:10.1126/science.336.6078.150-a


  3 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:12185675
[Au] Autor:Meierhenrich UJ; Thiemann WH; Barbier B; Brack A; Alcaraz C; Nahon L; Wolstencroft R
[Ad] Endereço:Universität Bremen, Dept. Phys. Chemistry, Bremen, Germany. mhenrich@uni-bremen.de
[Ti] Título:Circular polarization of light by planet Mercury and enantiomorphism of its surface minerals.
[So] Source:Orig Life Evol Biosph;32(2):181-90, 2002 Apr.
[Is] ISSN:0169-6149
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Different mechanisms for the generation of circular polarization by the surface of planets and satellites are described. The observed values for Venus, the Moon, Mars, and Jupiter obtained by photo-polarimetric measurements with Earth based telescopes, showed accordance with theory. However, for planet Mercury asymmetric parameters in the circular polarization were measured that do not fit with calculations. For BepiColombo, the ESA cornerstone mission 5 to Mercury, we propose to investigate this phenomenon using a concept which includes two instruments. The first instrument is a high-resolution optical polarimeter, capable to determine and map the circular polarization by remote scanning of Mercury's surface from the Mercury Planetary Orbiter MPO. The second instrument is an in situ sensor for the detection of the enantiomorphism of surface crystals and minerals, proposed to be included in the Mercury Lander MSE.
[Mh] Termos MeSH primário: Mercúrio (Planeta)
Minerais/análise
Luz Solar
[Mh] Termos MeSH secundário: Astronomia/métodos
Terra (Planeta)
Júpiter
Marte
Estereoisomerismo
Vênus
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Minerals)
[Em] Mês de entrada:0303
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM; S
[Da] Data de entrada para processamento:020821
[St] Status:MEDLINE


  4 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:11951022
[Au] Autor:Palme H
[Ad] Endereço:Institut für Mineralogie und Geochemie, Universität zu Köln, Zülpicherstrasse 49b, 50674 Köln, Germany. palme@gwp-min.min.uni-koeln.de
[Ti] Título:Planetary science. A new solar system basalt.
[So] Source:Science;296(5566):271-3, 2002 Apr 12.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Meteoroides
Minerais/análise
Planetas Menores
Isótopos de Oxigênio/análise
Silicatos/análise
[Mh] Termos MeSH secundário: Mercúrio (Planeta)
Oligoelementos/análise
[Pt] Tipo de publicação:COMMENT; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Minerals); 0 (Oxygen Isotopes); 0 (Silicates); 0 (Trace Elements); 0 (basalt)
[Em] Mês de entrada:0205
[Cu] Atualização por classe:070319
[Lr] Data última revisão:
070319
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:020416
[St] Status:MEDLINE


  5 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:10724161
[Au] Autor:Bida TA; Killen RM; Morgan TH
[Ad] Endereço:W.M. Keck Observatory, CARA, Kamuela, Hawaii 96743, USA. tbida@keck.hawaii.edu
[Ti] Título:Discovery of calcium in Mercury's atmosphere.
[So] Source:Nature;404(6774):159-61, 2000 Mar 09.
[Is] ISSN:0028-0836
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The composition and evolutionary history of Mercury's crust are not well determined. The planet as a whole has been predicted to have a refractory, anhydrous composition: rich in Ca, Al, Mg and Fe, but poor in Na, K, OH, and S. Its atmosphere is believed to be derived in large part from the surface materials. A combination of effects that include impact vaporization (from infalling material), volatile evaporation, photon-stimulated desorption and sputtering releases material from the surface to form the atmosphere. Sodium and potassium have already been observed in Mercury's atmosphere, with abundances that require a volatile-rich crust. The sodium probably results from photon-stimulated desorption, and has a temperature of 1,500 K (ref. 10). Here we report the discovery of calcium in the atmosphere near Mercury's poles. The column density is very low and the temperature is apparently very high (12,000 K). The localized distribution and high temperature, if confirmed, suggest that the atmospheric calcium may arise from surface sputtering by ions, which enter Mercury's auroral zone. The low abundance of atmospheric Ca may indicate that the regolith is rarefied in calcium.
[Mh] Termos MeSH primário: Cálcio/análise
Meio Ambiente Extraterreno
Mercúrio (Planeta)
[Mh] Termos MeSH secundário: Atmosfera
Análise Espectral
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
SY7Q814VUP (Calcium)
[Em] Mês de entrada:0004
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM; S
[Da] Data de entrada para processamento:000321
[St] Status:MEDLINE


  6 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:10458159
[Au] Autor:Yakshinskiy BV; Madey TE
[Ad] Endereço:Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway 08854-8019, USA.
[Ti] Título:Photon-stimulated desorption as a substantial source of sodium in the lunar atmosphere.
[So] Source:Nature;400(6745):642-4, 1999 Aug 12.
[Is] ISSN:0028-0836
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Mercury and the Moon both have tenuous atmospheres that contain atomic sodium and potassium. These chemicals must be continuously resupplied, as neither body can retain the atoms for more than a few hours. The mechanisms proposed to explain the resupply include sputtering of the surface by the solar wind, micrometeorite impacts, thermal desorption and photon-stimulated desorption. But there are few data and no general agreement about which processes dominate. Here we report laboratory studies of photon-stimulated desorption of sodium from surfaces that simulate lunar silicates. We find that bombardment of such surfaces at temperatures of approximately 250 K by ultraviolet photons (wavelength lambda < 300 nm) causes very efficient desorption of sodium atoms, induced by electronic excitations rather than by thermal processes or momentum transfer. The flux at the lunar surface of ultraviolet photons from the Sun is sufficient to ensure that photon-stimulated desorption of sodium contributes substantially to the Moon's atmosphere. On Mercury, solar heating of the surface implies that thermal desorption will also be an important source of atmospheric sodium.
[Mh] Termos MeSH primário: Meio Ambiente Extraterreno
Lua
Sódio
Raios Ultravioleta
[Mh] Termos MeSH secundário: Elétrons
Mercúrio (Planeta)
Fótons
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
9NEZ333N27 (Sodium)
[Em] Mês de entrada:9909
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM; S
[Da] Data de entrada para processamento:990824
[St] Status:MEDLINE


  7 / 8 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:7770770
[Au] Autor:Jeanloz R; Mitchell DL; Sprague AL; de Pater I
[Ad] Endereço:Department of Geology and Geophysics, University of California, Berkeley 94720, USA.
[Ti] Título:Evidence for a basalt-free surface on Mercury and implications for internal heat.
[So] Source:Science;268(5216):1455-7, 1995 Jun 09.
[Is] ISSN:0036-8075
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Microwave and mid-infrared observations reveal that Mercury's surface contains less FeO + TiO2 and at least as much feldspar as the lunar highlands. The results are compatible with the high albedo (brightness) of Mercury's surface at visible wavelengths in suggesting a rock and soil composition that is devoid of basalt, the primary differentiate of terrestrial mantles. The occurrence of a basalt-free, highly differentiated crust is in accord with recent models of the planet's thermal evolution and suggests that Mercury has retained a hot interior as a result of a combination of inefficient mantle convection and minimal volcanic heat loss.
[Mh] Termos MeSH primário: Compostos Ferrosos/análise
Mercúrio (Planeta)
Minerais/análise
Silicatos/análise
Titânio/análise
[Mh] Termos MeSH secundário: Temperatura Alta
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Ferrous Compounds); 0 (Minerals); 0 (Silicates); 0 (basalt); 15FIX9V2JP (titanium dioxide); D1JT611TNE (Titanium); G7036X8B5H (ferrous oxide)
[Em] Mês de entrada:9507
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM; S
[Da] Data de entrada para processamento:950609
[St] Status:MEDLINE


  8 / 8 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
[PMID]:7566115
[Au] Autor:Mendillo M; Baumgardner J
[Ad] Endereço:Center for Space Physics, Boston University, Massachusetts 02215, USA.
[Ti] Título:Constraints on the origin of the Moon's atmosphere from observations during a lunar eclipse.
[So] Source:Nature;377(6548):404-6, 1995 Oct 05.
[Is] ISSN:0028-0836
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The properties of the Moon's rarefied atmosphere, which can be traced through observations of sodium and potassium, provide important insights into the formation and maintenance of atmospheres on other primitive Solar System bodies. The lunar atmosphere is believed to be composed of atoms from the surface rocks and soil, which might have been sputtered by micrometeorites, by ions in the solar wind, or by photons. It might also form by the evaporation of atoms from the hot, illuminated surface. Here we report the detection of sodium emission from the Moon's atmosphere during a total lunar eclipse (which occurs when the Moon is full). The sodium atmosphere is considerably more extended at full Moon than expected--it extends to at least nine lunar radii--and its brightness distribution is incompatible with sources involving either solar-wind or micrometeorite sputtering. This leaves photon sputtering or thermal desorption as the preferred explanations for the lunar atmosphere, and suggests that sunlight might also be responsible for the transient atmospheres of other primitive bodies (such as Mercury).
[Mh] Termos MeSH primário: Meio Ambiente Extraterreno
Lua
[Mh] Termos MeSH secundário: Mercúrio (Planeta)
Sódio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
9NEZ333N27 (Sodium)
[Em] Mês de entrada:9511
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM; S
[Da] Data de entrada para processamento:951005
[St] Status:MEDLINE



página 1 de 1
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde