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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
13/09/1996 |
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Data da última atualização: |
13/09/1996 |
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Autoria: |
ANDREW, C. S.; PIETERS, W. H. J. |
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Título: |
Effect of potassium on the growth and chemical compositions of some pasture legumes. III. Deficiency symptoms of 10 tropical pasture legumes. |
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Ano de publicação: |
1970 |
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Fonte/Imprenta: |
Techonology Papers Australian, CSIRO Division Tropical Pasture, n.5, p.1-11, 1970. |
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Idioma: |
Inglês |
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Conteúdo: |
Foliar symptoms of potassium deficiency shown by 10 tropical pasture legumes are described, and recorded photographically. Deficiency symptoms were not uniform among all species but some generalizations are discussed. Potassium concentrations in the tops of deficiency and control plants are given. |
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Palavras-Chave: |
Deficiency symptoms; Growth; Pastagem tropical; Sintoma de deficiencia; Tropical pasture legumes. |
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Thesagro: |
Composição Química; Crescimento; Leguminosa; Potássio. |
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Thesaurus Nal: |
chemical composition; potassium. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01134naa a2200265 a 4500
001 1789751
005 1996-09-13
008 1970 bl --- 0-- u #d
100 1 $aANDREW, C. S.
245 $aEffect of potassium on the growth and chemical compositions of some pasture legumes. III. Deficiency symptoms of 10 tropical pasture legumes.
260 $c1970
520 $aFoliar symptoms of potassium deficiency shown by 10 tropical pasture legumes are described, and recorded photographically. Deficiency symptoms were not uniform among all species but some generalizations are discussed. Potassium concentrations in the tops of deficiency and control plants are given.
650 $achemical composition
650 $apotassium
650 $aComposição Química
650 $aCrescimento
650 $aLeguminosa
650 $aPotássio
653 $aDeficiency symptoms
653 $aGrowth
653 $aPastagem tropical
653 $aSintoma de deficiencia
653 $aTropical pasture legumes
700 1 $aPIETERS, W. H. J.
773 $tTechonology Papers Australian, CSIRO Division Tropical Pasture$gn.5, p.1-11, 1970.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
12/01/2005 |
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Data da última atualização: |
03/03/2010 |
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Autoria: |
MARTINS, M. A.; JOEKES, I.; FERREIRA, F. C.; JOB, A.; MATTOSO, L. H. C. |
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Título: |
Effect of processing conditions on thermal and mechanical properties of powdered tire rubber. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: PPS2004 AMERICAS REGIONAL MEETING. Florianópolis, 2004. Abstracts... Florianópolis, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
During the past few years, there has been substantial progress in the recycling of polymeric materiais. Unfortunately, the progress in the area of recycling thermosetting polymers such as rubbers has not been as successful, since these materiais are crosslinked and not biodegradable. Scrap tires are a major source of thermosetting materiais found in the waste. In this work, processing conditions to obtain matrices made from powdered tire rubber have been prepared by hot-press molding. The effects of temperature, and time at different processing conditions on the performance of the matrices have been studied. The matrices obtained have been characterized by tensile properties, thermogravimetric analysis, and scanning electron microscopy. The results have shown that under the conditions investigated the best processing conditions to make the matrix were: temperature 200 °C, for 3 h, at 4.1 MPa. The matrices obtained in these conditions have shown homogenous morphology without holes and failures. The different processing conditions studied do not influence the thermal stability of the rubber matrices. |
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Palavras-Chave: |
Polímeros; Propriedades mecânicas; Propriedades térmicas. |
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Thesagro: |
Borracha. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01777naa a2200217 a 4500
001 1028824
005 2010-03-03
008 2004 bl --- 0-- u #d
100 1 $aMARTINS, M. A.
245 $aEffect of processing conditions on thermal and mechanical properties of powdered tire rubber.
260 $c2004
520 $aDuring the past few years, there has been substantial progress in the recycling of polymeric materiais. Unfortunately, the progress in the area of recycling thermosetting polymers such as rubbers has not been as successful, since these materiais are crosslinked and not biodegradable. Scrap tires are a major source of thermosetting materiais found in the waste. In this work, processing conditions to obtain matrices made from powdered tire rubber have been prepared by hot-press molding. The effects of temperature, and time at different processing conditions on the performance of the matrices have been studied. The matrices obtained have been characterized by tensile properties, thermogravimetric analysis, and scanning electron microscopy. The results have shown that under the conditions investigated the best processing conditions to make the matrix were: temperature 200 °C, for 3 h, at 4.1 MPa. The matrices obtained in these conditions have shown homogenous morphology without holes and failures. The different processing conditions studied do not influence the thermal stability of the rubber matrices.
650 $aBorracha
653 $aPolímeros
653 $aPropriedades mecânicas
653 $aPropriedades térmicas
700 1 $aJOEKES, I.
700 1 $aFERREIRA, F. C.
700 1 $aJOB, A.
700 1 $aMATTOSO, L. H. C.
773 $tIn: PPS2004 AMERICAS REGIONAL MEETING. Florianópolis, 2004. Abstracts... Florianópolis, 2004.
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Embrapa Instrumentação (CNPDIA) |
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