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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
16/12/2009 |
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Data da última atualização: |
06/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TORAL, F. L. B.; TORRES JÚNIOR, R. A. de A.; LOPES, P. S.; SILVA, L. O. C. da; REIS FILHO, J. C. |
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Afiliação: |
FÁBIO LUIZ BURANELO TORAL, UNIVERSIDADE FEDERAL DE MATO GROSSO; ROBERTO AUGUSTO DE ALMEIDA TORRES JÚNIOR, CNPGC; PAULO SÁVIO LOPES, UNIVERSIDADE FEDERAL DE VIÇOSA; LUIZ OTAVIO CAMPOS DA SILVA, CNPGC; JOÃO CRUZ REIS FILHO, MINISTÉRIO DA AGRICULTURA, PECUÁRIA E ABASTECIMENTO. |
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Título: |
Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 38, n. 7, p. 1229-1237, jul. 2009. |
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DOI: |
http://dx.doi.org/10.1590/S1516-35982009000700011 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Modelagem do efeito da idade da vaca ao parto sobre o peso à desmama de bezerros mestiços Charolês-Zebu. |
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Conteúdo: |
ABSTRACT - The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials. RESUMO - Este trabalho foi realizado com o objetivo de avaliar alternativas para a modelagem do efeito da idade da vaca ao parto sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Os dados de 56.965 bezerros foram analisados por meio de modelos estatísticos, considerando os efeitos fixos de grupo de contemporâneos, grupos genéticos do touro e da vaca e da idade da vaca ao parto. O efeito da idade da vaca ao parto foi modelado utilizando-se classes anuais de idade, polinômios ordinários (PO) de ordem quadrática até quíntica, ou polinômios segmentados com 2, 3, 4, 6 ou 12 intervalos do mesmo tamanho. No caso dos polinômios segmentados, consideraram-se os efeitos linear e quadrático gerais e apenas o quadrático a partir de cada nó. Os efeitos da idade da vaca ao parto foram considerados aninhados em sexo do bezerro em todos os casos. De acordo com os critérios de ajuste utilizados, ou seja, o teste F para diferenças de soma de quadrados, coeficiente de determinação do modelo, soma de quadrados do resíduo e média dos resíduos ao quadrado, o polinômio segmentado com três intervalos (dois nós) se ajustou tão bem aos dados quanto os polinômios mais complexos. MenosABSTRACT - The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials. RESUMO - Este trabalho foi realizado com o objetivo de avaliar alternativas para a modelagem do efeito da idade da vaca ao parto sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Os dados de 56.965 bezerros foram analisados por meio de modelos estatísticos, considerando os efeitos fixos de grupo de contemporâneos, grupos genéticos do touro e da vaca e da idade da vaca ao parto. O efeito da idade da vaca ao parto foi modelado utilizando-se... Mostrar Tudo |
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Thesagro: |
Análise Estatística; Bezerro Mestiço; Gado Charolês; Gado de Corte; Impacto Ambiental; Melhoramento Genético Animal; Seleção Genética; Vaca. |
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Thesaurus Nal: |
Beef cattle; Charolais; Least squares; Statistical models; Weaning weight. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/578222/1/Modeling-effect-age-dam-2009.pdf
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Marc: |
LEADER 03435naa a2200349 a 4500
001 1578222
005 2023-06-06
008 2009 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/S1516-35982009000700011$2DOI
100 1 $aTORAL, F. L. B.
245 $aModeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves.
260 $c2009
500 $aTítulo em português: Modelagem do efeito da idade da vaca ao parto sobre o peso à desmama de bezerros mestiços Charolês-Zebu.
520 $aABSTRACT - The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials. RESUMO - Este trabalho foi realizado com o objetivo de avaliar alternativas para a modelagem do efeito da idade da vaca ao parto sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Os dados de 56.965 bezerros foram analisados por meio de modelos estatísticos, considerando os efeitos fixos de grupo de contemporâneos, grupos genéticos do touro e da vaca e da idade da vaca ao parto. O efeito da idade da vaca ao parto foi modelado utilizando-se classes anuais de idade, polinômios ordinários (PO) de ordem quadrática até quíntica, ou polinômios segmentados com 2, 3, 4, 6 ou 12 intervalos do mesmo tamanho. No caso dos polinômios segmentados, consideraram-se os efeitos linear e quadrático gerais e apenas o quadrático a partir de cada nó. Os efeitos da idade da vaca ao parto foram considerados aninhados em sexo do bezerro em todos os casos. De acordo com os critérios de ajuste utilizados, ou seja, o teste F para diferenças de soma de quadrados, coeficiente de determinação do modelo, soma de quadrados do resíduo e média dos resíduos ao quadrado, o polinômio segmentado com três intervalos (dois nós) se ajustou tão bem aos dados quanto os polinômios mais complexos.
650 $aBeef cattle
650 $aCharolais
650 $aLeast squares
650 $aStatistical models
650 $aWeaning weight
650 $aAnálise Estatística
650 $aBezerro Mestiço
650 $aGado Charolês
650 $aGado de Corte
650 $aImpacto Ambiental
650 $aMelhoramento Genético Animal
650 $aSeleção Genética
650 $aVaca
700 1 $aTORRES JÚNIOR, R. A. de A.
700 1 $aLOPES, P. S.
700 1 $aSILVA, L. O. C. da
700 1 $aREIS FILHO, J. C.
773 $tRevista Brasileira de Zootecnia$gv. 38, n. 7, p. 1229-1237, jul. 2009.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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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
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
20/10/2021 |
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Data da última atualização: |
20/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NOVOTNY, E. H.; KNICKER, H.; COLNAGO, L. A.; MARTIN NETO, L. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; HEIKE KNICKER; LUIZ ALBERTO COLNAGO, CNPDIA; LADISLAU MARTIN NETO, CNPDIA. |
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Título: |
Effect of residual vanadyl on the spectroscopic analysis of humic acids. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Organic Geochemistry, v. 37, n. 11, p. 1562-1572, Nov. 2006. |
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DOI: |
https://doi.org/10.1016/j.orggeochem.2006.06.015 |
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Idioma: |
Inglês |
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Notas: |
Na publicação: Ladislau Martin-Neto. |
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Conteúdo: |
The effect of residual vanadyl (VO2+) on data derived from the analysis of humic acids (HAs) by means of fluorescence spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy (NMR) and UV-Vis spectroscopy was examined in order to reveal potential organic groups involved in metal complexation. The HAs were extracted from agricultural soils from an experimental station in Campinas, Brazil. Their paramagnetic ion content was determined using electron paramagnetic resonance (EPR). Because of the well-resolved EPR signal, the VO2+ ion content was used for the correlation studies. The latter clearly demonstrated that residual VO2+ affects the spectroscopic data and that, besides the intrinsic structural characteristic of HAs, the impact of paramagnetic ions must be considered for careful interpretation of such data. On the other hand, analysis of these effects can give additional structural information. With respect to the UV-Vis spectra, the positive correlation between VO2+ content and the absorption at 665 nm (E6) was attributed to the presence of VO2+ complexes. Further support for metal-humic substance binding was extracted by way of a reduction in the fluorescence intensity with increasing VO2+ concentration for both excitation and emission. A relationship between the suppression of the intensity of the O-alkyl, di-O-alkyl and carboxyl C signals in the solid-state 13C NMR spectra and the VO2+ content demonstrated the involvement of carbohydrates in metal complexation, probably in the uronic acid form. No clear correlation was observed with respect to the O-aryl C signal, which may be due to a low accessibility of the metallic ion to methyl- substituted O-aryl groups as they occur in lignin derivatives. MenosThe effect of residual vanadyl (VO2+) on data derived from the analysis of humic acids (HAs) by means of fluorescence spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy (NMR) and UV-Vis spectroscopy was examined in order to reveal potential organic groups involved in metal complexation. The HAs were extracted from agricultural soils from an experimental station in Campinas, Brazil. Their paramagnetic ion content was determined using electron paramagnetic resonance (EPR). Because of the well-resolved EPR signal, the VO2+ ion content was used for the correlation studies. The latter clearly demonstrated that residual VO2+ affects the spectroscopic data and that, besides the intrinsic structural characteristic of HAs, the impact of paramagnetic ions must be considered for careful interpretation of such data. On the other hand, analysis of these effects can give additional structural information. With respect to the UV-Vis spectra, the positive correlation between VO2+ content and the absorption at 665 nm (E6) was attributed to the presence of VO2+ complexes. Further support for metal-humic substance binding was extracted by way of a reduction in the fluorescence intensity with increasing VO2+ concentration for both excitation and emission. A relationship between the suppression of the intensity of the O-alkyl, di-O-alkyl and carboxyl C signals in the solid-state 13C NMR spectra and the VO2+ content demonstrated the involvement of carbohydrates in metal complex... Mostrar Tudo |
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Thesaurus NAL: |
humic acids. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02368naa a2200193 a 4500
001 2135467
005 2021-10-20
008 2006 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.orggeochem.2006.06.015$2DOI
100 1 $aNOVOTNY, E. H.
245 $aEffect of residual vanadyl on the spectroscopic analysis of humic acids.$h[electronic resource]
260 $c2006
500 $aNa publicação: Ladislau Martin-Neto.
520 $aThe effect of residual vanadyl (VO2+) on data derived from the analysis of humic acids (HAs) by means of fluorescence spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy (NMR) and UV-Vis spectroscopy was examined in order to reveal potential organic groups involved in metal complexation. The HAs were extracted from agricultural soils from an experimental station in Campinas, Brazil. Their paramagnetic ion content was determined using electron paramagnetic resonance (EPR). Because of the well-resolved EPR signal, the VO2+ ion content was used for the correlation studies. The latter clearly demonstrated that residual VO2+ affects the spectroscopic data and that, besides the intrinsic structural characteristic of HAs, the impact of paramagnetic ions must be considered for careful interpretation of such data. On the other hand, analysis of these effects can give additional structural information. With respect to the UV-Vis spectra, the positive correlation between VO2+ content and the absorption at 665 nm (E6) was attributed to the presence of VO2+ complexes. Further support for metal-humic substance binding was extracted by way of a reduction in the fluorescence intensity with increasing VO2+ concentration for both excitation and emission. A relationship between the suppression of the intensity of the O-alkyl, di-O-alkyl and carboxyl C signals in the solid-state 13C NMR spectra and the VO2+ content demonstrated the involvement of carbohydrates in metal complexation, probably in the uronic acid form. No clear correlation was observed with respect to the O-aryl C signal, which may be due to a low accessibility of the metallic ion to methyl- substituted O-aryl groups as they occur in lignin derivatives.
650 $ahumic acids
700 1 $aKNICKER, H.
700 1 $aCOLNAGO, L. A.
700 1 $aMARTIN NETO, L.
773 $tOrganic Geochemistry$gv. 37, n. 11, p. 1562-1572, Nov. 2006.
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