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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
02/08/1993 |
Data da última atualização: |
19/10/2007 |
Autoria: |
FERREIRA, W. R. V. |
Título: |
A nostalgia do popular sob o patrocinio da ideologia |
Ano de publicação: |
1985 |
Fonte/Imprenta: |
Comm. & Artes, v. 14, p. 45-54, 1985. |
Idioma: |
Português |
Categoria do assunto: |
-- |
Marc: |
LEADER 00301naa a2200109 a 4500 001 1279224 005 2007-10-19 008 1985 bl --- 0-- u #d 100 1 $aFERREIRA, W. R. V. 245 $aA nostalgia do popular sob o patrocinio da ideologia 260 $c1985 773 $tComm. & Artes$gv. 14, p. 45-54, 1985.
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Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
22/11/2002 |
Data da última atualização: |
22/04/2024 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
PEREZ, D. V.; SALDANHA, M. F. C.; MOREIRA, J. C.; VAITSMAN, D. S. |
Afiliação: |
DANIEL VIDAL PEREZ, CNPS; MARCELO FRANCISCO COSTA SALDANHA, CNPS. |
Título: |
Evaluation of uranium, thorium and niobium concentrations in some Brazilian soils. |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON PROCESS RELATED TO ANALYTICAL CHEMISTRY IN ENVIRONMENTAL INVESTIGATIONS, 5., 1996, Gramado. Abstracts... Gramado: UFRGS, 1996. p. 27. |
Idioma: |
Inglês |
Conteúdo: |
Samples from superficial (A) and subsuperficial (B) diagnostic horizons of 15 Brazilian soils were analysed to determine the content of uranium, thorium and niobium (on a dry weight basis) by inductively coupled plasma - mass spectrocopy (ELAN 5000, Perkin-Elmer) following digestion with "aqua regia". A rande of 1.69 to 2.018 ug/kg for uranium were obtained for the superficial (A) horizons. A range of 0.47 to 937.6 ug/kg for niobium, 3.36 to 38.080 ug/kg for thorium and 1.28 to 2.298 ug/kg for uranium were obtained for the subsuperficial (B) horizons. In general except for Nb, soil samples of the B horizon showed higher contents of Th and U than those collected from the A horizon. The Pearson correlation, coefficients (all positives) were found in the A horizons between U and Fe (P<0.001), U and Th (P<0.01) Th and Fe (P<0.01), Nb and Fe (P<0.05). In the B horizons, only the correlation between U and Fe was significant (P<0.001). |
Palavras-Chave: |
Nióbio; Tório. |
Thesagro: |
Solo; Urânio. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01597nam a2200193 a 4500 001 1331675 005 2024-04-22 008 1996 bl uuuu u00u1 u #d 100 1 $aPEREZ, D. V. 245 $aEvaluation of uranium, thorium and niobium concentrations in some Brazilian soils. 260 $aIn: INTERNATIONAL COLLOQUIUM ON PROCESS RELATED TO ANALYTICAL CHEMISTRY IN ENVIRONMENTAL INVESTIGATIONS, 5., 1996, Gramado. Abstracts... Gramado: UFRGS, 1996. p. 27.$c1996 520 $aSamples from superficial (A) and subsuperficial (B) diagnostic horizons of 15 Brazilian soils were analysed to determine the content of uranium, thorium and niobium (on a dry weight basis) by inductively coupled plasma - mass spectrocopy (ELAN 5000, Perkin-Elmer) following digestion with "aqua regia". A rande of 1.69 to 2.018 ug/kg for uranium were obtained for the superficial (A) horizons. A range of 0.47 to 937.6 ug/kg for niobium, 3.36 to 38.080 ug/kg for thorium and 1.28 to 2.298 ug/kg for uranium were obtained for the subsuperficial (B) horizons. In general except for Nb, soil samples of the B horizon showed higher contents of Th and U than those collected from the A horizon. The Pearson correlation, coefficients (all positives) were found in the A horizons between U and Fe (P<0.001), U and Th (P<0.01) Th and Fe (P<0.01), Nb and Fe (P<0.05). In the B horizons, only the correlation between U and Fe was significant (P<0.001). 650 $aSolo 650 $aUrânio 653 $aNióbio 653 $aTório 700 1 $aSALDANHA, M. F. C. 700 1 $aMOREIRA, J. C. 700 1 $aVAITSMAN, D. S.
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