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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
28/01/2019 |
Data da última atualização: |
28/01/2019 |
Autoria: |
GOMES, H. de A.; YANNICK NOUAILHETAS; SILVA, N. C. da; ARNALDO MEZRAHI; CARLOS E. BONACOSSA de ALMEIDA; RODRIGUES, G. S. |
Afiliação: |
HELOISA DE AZEVEDO GOMES, CNEN - Comissão Nacional de Energia Nuclear; NOUAILHETAS, Y., Coordenação de Instalações Nucleares/RJ; NIVALDO CARLOS DA SILVA, CNEN - Comissão Nacional de Energia Nuclear; MEZRAHI, A., Coordenação de Instalações Nucleares/RJ; ALMEIRA, C. E. B. de, Coordenação de Instalações Nucleares/RJ; GERALDO STACHETTI RODRIGUES, CNPMA. |
Título: |
Biological response of tradescantia stamen-hairs to high levels of natural radiation in the Poços de Caldas plateau. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
In: Brazilian Archives of Biology and Technology. Curitiba, v.45, n.3, , Sep. 2002. |
Páginas: |
p. 301-307 |
Idioma: |
Inglês |
Conteúdo: |
The objective of the present study was to apply a highly sensitive botanical test of mutagenicity (the Tradescantia stamen-hair mutation bioassay) to assess in situ the biological responses induced by naturally occurring radiation in the Poços de Caldas Plateau. The mutagenesis was evaluated in environments presenting gamma radiation exposure rates ranging from 1.5 mR.min-1 up to 100.0 mR.min-1. The results consistently showed only borderline increases in mutation frequencies in plants exposed to areas with high radiation background, as compared to non-exposed plants. It was concluded that the levels of natural radiation prevalent in the Poços de Caldas Plateau were not sufficient to induce significant increases in mutation rate, even in the extremely sensitive Tradescantia stamen hair mutation bioassay and mutagenesis evaluation test could be a useful monitoring system for natural radiation exposure. |
Palavras-Chave: |
Biological; Radiação natural. |
Thesaurus Nal: |
Tradescantia. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/191402/1/Rodrigues-Biological-Response-of-Tradescantia-Stamen-hairs-t-1.pdf
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Marc: |
LEADER 01663naa a2200229 a 4500 001 2104895 005 2019-01-28 008 2002 bl uuuu u00u1 u #d 100 1 $aGOMES, H. de A. 245 $aBiological response of tradescantia stamen-hairs to high levels of natural radiation in the Poços de Caldas plateau.$h[electronic resource] 260 $c2002 300 $ap. 301-307 520 $aThe objective of the present study was to apply a highly sensitive botanical test of mutagenicity (the Tradescantia stamen-hair mutation bioassay) to assess in situ the biological responses induced by naturally occurring radiation in the Poços de Caldas Plateau. The mutagenesis was evaluated in environments presenting gamma radiation exposure rates ranging from 1.5 mR.min-1 up to 100.0 mR.min-1. The results consistently showed only borderline increases in mutation frequencies in plants exposed to areas with high radiation background, as compared to non-exposed plants. It was concluded that the levels of natural radiation prevalent in the Poços de Caldas Plateau were not sufficient to induce significant increases in mutation rate, even in the extremely sensitive Tradescantia stamen hair mutation bioassay and mutagenesis evaluation test could be a useful monitoring system for natural radiation exposure. 650 $aTradescantia 653 $aBiological 653 $aRadiação natural 700 1 $aYANNICK NOUAILHETAS 700 1 $aSILVA, N. C. da 700 1 $aARNALDO MEZRAHI 700 1 $aCARLOS E. BONACOSSA de ALMEIDA 700 1 $aRODRIGUES, G. S. 773 $tIn: Brazilian Archives of Biology and Technology. Curitiba$gv.45, n.3, , Sep. 2002.
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Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
12/06/2007 |
Data da última atualização: |
12/06/2007 |
Autoria: |
MEDEIROS, E. S. de; CARVALHO, L. H. de; AGNELLI, J. A. M.; MATTOSO, L. H. C. |
Título: |
Thermal behavior of phenolic composites reinforced with jute/cotton hybrid fabrics. Thermogravimetric and flammability studies. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: MACRO 2006; WORLD POLYMER CONGRESS, Rio de Janeiro, Brazil; INTERNATIONAL SYMPOSIUM ON MACROMOLECULES, 41ST., 2006, Rio de Janeiro. Proceedings... [S. l.]: ABPol, 2006. 1 CD-ROM. |
Idioma: |
Inglês |
Categoria do assunto: |
-- |
Marc: |
LEADER 00624naa a2200145 a 4500 001 1030458 005 2007-06-12 008 2006 bl --- 0-- u #d 100 1 $aMEDEIROS, E. S. de 245 $aThermal behavior of phenolic composites reinforced with jute/cotton hybrid fabrics. Thermogravimetric and flammability studies. 260 $c2006 700 1 $aCARVALHO, L. H. de 700 1 $aAGNELLI, J. A. M. 700 1 $aMATTOSO, L. H. C. 773 $tIn: MACRO 2006; WORLD POLYMER CONGRESS, Rio de Janeiro, Brazil; INTERNATIONAL SYMPOSIUM ON MACROMOLECULES, 41ST., 2006, Rio de Janeiro. Proceedings... [S. l.]: ABPol, 2006. 1 CD-ROM.
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