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| Registros recuperados : 12 | |
| 6. |  | MORAES, S. da S.; SINN, H. R.; HABERMEHL, G.; TERNES, W.; CAMPOS, R. C. de. Determinacao de selenio em figado de bovino pela tecnica de geracao de hidratos: espectrofotometria de absorcao atomica. Pesquisa Agropecuaria Brasileira, Brasilia, v.30, n.11, p.1347-1353, nov. 1995. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 7. | | MORAES, S. da S.; SINN, H. R.; HABERMEHL, G.; TERNES, W.; CAMPOS, R. C. de. Determinacao de selenio em figado bovino pela tecnica de geracao de hidretos: espectrofotometria de absorcao atomica. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 11, p. 1347-1353, nov.1995. Título em inglês: Selenium determination in bovine liver by hydride generation: atomic absorption spectrophotometry.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 11. | | VIEIRA, L. M.; NUNES, V. S.; AMARAL, M. C. R. do; OLIVEIRA, A. C.; CAMPOS, R. C. de. Mercury levels in alligators (Caiman crocodilus yacare) from the Pantanal region, Brazil. Revista Paraense de Medicina, v.17, n. 4, p.67-68, out./dez., 2003.| Biblioteca(s): Embrapa Pantanal. |
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| 12. | | VIEIRA, L. M.; NUNES, V. da S.; AMARAL, M. C. R. do; OLIVEIRA, A. C.; CAMPOS, R. C. de. Níveis de mercúrio (HG) em jacarés (Caiman crocodilus yacare) do Pantanal. In: SIMPÓSIO SOBRE RECURSOS NATURAIS E SÓCIO-ECONÔMICOS DO PANTANAL, 4., 2004, Corumbá, MS. Sustentabilidade regional: anais. Corumbá: Embrapa Pantanal: UCDB: UFMS: SEBRAE-MS, 2004. (CD-ROM).| Biblioteca(s): Embrapa Pantanal. |
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| Registros recuperados : 12 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
09/11/2004 |
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Data da última atualização: |
08/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREZ, D. V.; CAMPOS, R. C. de; NOVAES, H. B. |
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Afiliação: |
DANIEL VIDAL PEREZ, CNPS; REINALDO CALIXTO DE CAMPOS, PUC-RIO; HUMBERTO BREVILATO NOVAES, UFRJ. |
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Título: |
Soil solution charge balance for defining the speed and time of centrifugation of two Brazilian soils. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, v. 33, n. 13/14, p. 2021-2036, 2002. |
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DOI: |
https://doi.org/10.1081/CSS-120005746 |
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Idioma: |
Inglês |
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Conteúdo: |
Soil solution chemistry is a powerful tool for studying many aspects of soil science. Consequently, isolation and chemical analysis of the soil solution are essential procedures in soil chemistry studies. Among several isolation techniques, centrifugation appears most promising as a method of extracting the soil solution in the laboratory. However, some operational conditions must be defined. The present work reports the influence of the centrifugation time (30 and 60 min) and speed (560, 2,260, and 5,080 g) on the observed composition of the soil solution of four samples from two typical and representative Brazilian Oxisols. The concentrations of Ca, Mg, Al, Na, K, Mn, Fe, Zn, Cl-, and F- varied significantly with the centrifugation speed but not with time. Charge balance calculations for the evaluation of the electrochemical neutrality showed that an extraction time of 1 h at a speed of 2,260 g should be recommended for further studies with similar soil samples. Some relationships, such as ionic strength vs. electrical conductivity and pH vs. Al concentration were also investigated. |
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Thesagro: |
Química do Solo; Solução do solo. |
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Thesaurus NAL: |
Soil chemical properties; Soil solution. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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001 1327465
005 2021-10-08
008 2002 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1081/CSS-120005746$2DOI
100 1 $aPEREZ, D. V.
245 $aSoil solution charge balance for defining the speed and time of centrifugation of two Brazilian soils.$h[electronic resource]
260 $c2002
520 $aSoil solution chemistry is a powerful tool for studying many aspects of soil science. Consequently, isolation and chemical analysis of the soil solution are essential procedures in soil chemistry studies. Among several isolation techniques, centrifugation appears most promising as a method of extracting the soil solution in the laboratory. However, some operational conditions must be defined. The present work reports the influence of the centrifugation time (30 and 60 min) and speed (560, 2,260, and 5,080 g) on the observed composition of the soil solution of four samples from two typical and representative Brazilian Oxisols. The concentrations of Ca, Mg, Al, Na, K, Mn, Fe, Zn, Cl-, and F- varied significantly with the centrifugation speed but not with time. Charge balance calculations for the evaluation of the electrochemical neutrality showed that an extraction time of 1 h at a speed of 2,260 g should be recommended for further studies with similar soil samples. Some relationships, such as ionic strength vs. electrical conductivity and pH vs. Al concentration were also investigated.
650 $aSoil chemical properties
650 $aSoil solution
650 $aQuímica do Solo
650 $aSolução do solo
700 1 $aCAMPOS, R. C. de
700 1 $aNOVAES, H. B.
773 $tCommunications in Soil Science and Plant Analysis$gv. 33, n. 13/14, p. 2021-2036, 2002.
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