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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
15/03/2001 |
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Data da última atualização: |
15/03/2001 |
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Autoria: |
FREITAS, A. R. de; SILVA, L. O. C. da; EUCLIDES FILHO, K.; JOSAHKIAN, L. A.; ALENCAR, M. M. |
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Afiliação: |
Embrapa Pecuaria Sudeste (Sao Paulo, SP). |
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Título: |
A qualidade da pesagem de bovinos da raca Nelore. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, Vicosa. Resumos dos trabalhos apresentados. Anais. Vicosa: SBZ, 2000. |
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Páginas: |
p.190. |
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Idioma: |
Português |
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Notas: |
CNPGC. |
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Conteúdo: |
Foram analisados dados de nove pesagens, do nascimento ate 24 meses de idade, de 541920 animais Nelore controlados pela Associacao Brasileira de Criadores de Zebu. O objetivo foi avaliar o padrao da qualidade de pesagem desses animais no campo e implicacoes para o sucesso do melhoramento genetico da raca. Foram detectados vicios nas pesagens dos animais em condicoes de campo. |
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Palavras-Chave: |
Bovino de corte; Distribuicao normal; Melhoramento genetico; Nelore; Quality; Vivios de pesagens em condicoes de campo; Weighing. |
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Thesagro: |
Pesagem; Peso; Qualidade. |
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Thesaurus Nal: |
beef cattle; breeding; Nellore; weight. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01377naa a2200361 a 4500
001 1323990
005 2001-03-15
008 2000 bl uuuu u00u1 u #d
100 1 $aFREITAS, A. R. de
245 $aA qualidade da pesagem de bovinos da raca Nelore.
260 $c2000
300 $ap.190.
500 $aCNPGC.
520 $aForam analisados dados de nove pesagens, do nascimento ate 24 meses de idade, de 541920 animais Nelore controlados pela Associacao Brasileira de Criadores de Zebu. O objetivo foi avaliar o padrao da qualidade de pesagem desses animais no campo e implicacoes para o sucesso do melhoramento genetico da raca. Foram detectados vicios nas pesagens dos animais em condicoes de campo.
650 $abeef cattle
650 $abreeding
650 $aNellore
650 $aweight
650 $aPesagem
650 $aPeso
650 $aQualidade
653 $aBovino de corte
653 $aDistribuicao normal
653 $aMelhoramento genetico
653 $aNelore
653 $aQuality
653 $aVivios de pesagens em condicoes de campo
653 $aWeighing
700 1 $aSILVA, L. O. C. da
700 1 $aEUCLIDES FILHO, K.
700 1 $aJOSAHKIAN, L. A.
700 1 $aALENCAR, M. M.
773 $tIn: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, Vicosa. Resumos dos trabalhos apresentados. Anais. Vicosa: SBZ, 2000.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/11/2014 |
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Data da última atualização: |
18/11/2014 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
MATTOS, B.; LAZZAROTTO, M.; MAGALHAES, W. L. E.; GATTO, D. A. |
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Afiliação: |
Bruno Dufau Mattos, PIPE, UFPR; MARCELO LAZZAROTTO, CNPF; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Darci Alberto Gatto, Universidade Federal de Pelotas. |
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Título: |
Thermal tools to evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC, 2014. |
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Páginas: |
6 p. |
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Descrição Física: |
Disponibilizado online. |
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Idioma: |
Inglês |
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Notas: |
CBRATEC. |
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Conteúdo: |
This study aims to apply thermal tools in the evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization of methyl methacrylate (MMA) using glycidyl methacrylate (GMA) and methacrylic acid (MAA) as cross-linkers. The pine wood samples were impregnated in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1.5 wt% as catalyst. The untreated wood and composites were exposed to in vitro decay tests with Trametes versicolor and Gloeophyllum trabeum fungi, and to artificial weathering. The weight loss after tests was measured, and the characterization was performed by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analysis. The mass loss caused by exposure to fungi was evidently higher in untreated wood in relation to the composites, ~2.5 to 10 times - the composites with GMA and MAA showed the highest resistance to both fungi. The composites without cross-linkers showed the higher mass loss in the artificial weathering tests (>11%), due to the leaching of part of poly(MMA) formed inside wood. By TGA and DSC analysis, we observed shifting in the temperature of thermal events related to polysaccharides and lignin after exposed to decays tests ? more significant changes were for Trametes versicolor tests. The thermograms related to weathered samples showed different results for each composite. The untreated wood and the composite without cross-linker presented loss in lignin, meanwhile the composites with cross-linkers presented degradation in the copolymer formed onto surface of wood. Keywords: TGA, DSC, pinewood, methacrylate, additives MenosThis study aims to apply thermal tools in the evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization of methyl methacrylate (MMA) using glycidyl methacrylate (GMA) and methacrylic acid (MAA) as cross-linkers. The pine wood samples were impregnated in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1.5 wt% as catalyst. The untreated wood and composites were exposed to in vitro decay tests with Trametes versicolor and Gloeophyllum trabeum fungi, and to artificial weathering. The weight loss after tests was measured, and the characterization was performed by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analysis. The mass loss caused by exposure to fungi was evidently higher in untreated wood in relation to the composites, ~2.5 to 10 times - the composites with GMA and MAA showed the highest resistance to both fungi. The composites without cross-linkers showed the higher mass loss in the artificial weathering tests (>11%), due to the leaching of part of poly(MMA) formed inside wood. By TGA and DSC analysis, we observed shifting in the temperature of thermal events related to polysaccharides and lignin after exposed to decays tests ? more significant changes were for Trametes versicolor tests. The thermograms related to weathered samples showed different results for each composite. The untreated wood and the composite without cross-linker presented loss in lignin, meanwhi... Mostrar Tudo |
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Palavras-Chave: |
Compósito; DSC; Metacrilato; Methacrylate; Pinewood; Polímero; TGA. |
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Thesagro: |
Aditivo; Madeira. |
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Thesaurus NAL: |
additives. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/111823/1/2014-MarceloL-CBATC-ThermalTools.pdf
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Marc: |
LEADER 02528nam a2200289 a 4500
001 2000392
005 2014-11-18
008 2014 bl uuuu u00u1 u #d
100 1 $aMATTOS, B.
245 $aThermal tools to evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC$c2014
300 $a6 p.$cDisponibilizado online.
500 $aCBRATEC.
520 $aThis study aims to apply thermal tools in the evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization of methyl methacrylate (MMA) using glycidyl methacrylate (GMA) and methacrylic acid (MAA) as cross-linkers. The pine wood samples were impregnated in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1.5 wt% as catalyst. The untreated wood and composites were exposed to in vitro decay tests with Trametes versicolor and Gloeophyllum trabeum fungi, and to artificial weathering. The weight loss after tests was measured, and the characterization was performed by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analysis. The mass loss caused by exposure to fungi was evidently higher in untreated wood in relation to the composites, ~2.5 to 10 times - the composites with GMA and MAA showed the highest resistance to both fungi. The composites without cross-linkers showed the higher mass loss in the artificial weathering tests (>11%), due to the leaching of part of poly(MMA) formed inside wood. By TGA and DSC analysis, we observed shifting in the temperature of thermal events related to polysaccharides and lignin after exposed to decays tests ? more significant changes were for Trametes versicolor tests. The thermograms related to weathered samples showed different results for each composite. The untreated wood and the composite without cross-linker presented loss in lignin, meanwhile the composites with cross-linkers presented degradation in the copolymer formed onto surface of wood. Keywords: TGA, DSC, pinewood, methacrylate, additives
650 $aadditives
650 $aAditivo
650 $aMadeira
653 $aCompósito
653 $aDSC
653 $aMetacrilato
653 $aMethacrylate
653 $aPinewood
653 $aPolímero
653 $aTGA
700 1 $aLAZZAROTTO, M.
700 1 $aMAGALHAES, W. L. E.
700 1 $aGATTO, D. A.
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