| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
18/11/2019 |
|
Data da última atualização: |
18/11/2019 |
|
Autoria: |
FERNANDES, F. A.; FERNANDES, T. J.; PEREIRA, A. A.; MEIRELLES, S. L. C.; COSTA, A. C. |
|
Afiliação: |
Felipe Augusto Fernandes, Universidade Federal de Lavras - UFLA/Departamento de Estatística; Tales Jesus Fernandes, Universidade Federal de Lavras - UFLA/Departamento de Estatística; Adriele Aparecida Pereira, Universidade Federal de Alfenas - Unifal/Instituto de Ciências Sociais Aplicadas; Sarah Laguna Conceição Meirelles, Universidade Federal de Lavras - UFLA/Departamento de Zootecnia; Adriano Carvalho Costa, Instituto Federal de Goiás. |
|
Título: |
Growth curves of meat-producing mammals by von Bertalanffy?s model. |
|
Ano de publicação: |
2019 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira v. 54, e01162, jan./dez. 2019. |
|
Idioma: |
Inglês |
|
Notas: |
Título em português: Curvas de crescimento de mamíferos produtores de carne pelo modelo de von Bertalanffy. |
|
Conteúdo: |
The objective of this work was to evaluate how the parameterization and the application of different allometric values affect the obtention of the most adequate fit of von Bertalanffy?s model, in the description of the growth curve of meat-producing mammals (bovine, pigs, rabbits, and sheep). Among the nonlinear models, von Bertalanffy?s has been very often applied in several areas, with different parameterizations. This model has been commonly used with an allometric value of m = 2/3; however, for mammals, it is believed that this value can be m = 3/4. The analyzed data referring to the mass of meat-producing mammals according to their age were obtained from research institutions and from the literature. The results showed that von Bertalanffy?s model, with the allometric value of m = 3/4 and the used parameterization, provided better adjustments to quality evaluators. Besides, the model softened the overestimation of parameter a, giving a direct interpretation of parameter b, with the lowest values for curvature measurements, mainly for the parametric ones, and provided more reliable adjustments. Von Bertalanffy?s model can be used in the description of the growth curves of meat-producing mammals. |
|
Palavras-Chave: |
Alometria; Modelagem; Modeling; Modelo não linear; Parameterization; Parametrização; Regression. |
|
Thesagro: |
Regressão Linear. |
|
Thesaurus Nal: |
Allometry; Nonlinear models. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204890/1/Growth-curves-of-meat-producing.pdf
|
|
Marc: |
LEADER 02154naa a2200301 a 4500
001 2114520
005 2019-11-18
008 2019 bl uuuu u00u1 u #d
100 1 $aFERNANDES, F. A.
245 $aGrowth curves of meat-producing mammals by von Bertalanffy?s model.$h[electronic resource]
260 $c2019
500 $aTítulo em português: Curvas de crescimento de mamíferos produtores de carne pelo modelo de von Bertalanffy.
520 $aThe objective of this work was to evaluate how the parameterization and the application of different allometric values affect the obtention of the most adequate fit of von Bertalanffy?s model, in the description of the growth curve of meat-producing mammals (bovine, pigs, rabbits, and sheep). Among the nonlinear models, von Bertalanffy?s has been very often applied in several areas, with different parameterizations. This model has been commonly used with an allometric value of m = 2/3; however, for mammals, it is believed that this value can be m = 3/4. The analyzed data referring to the mass of meat-producing mammals according to their age were obtained from research institutions and from the literature. The results showed that von Bertalanffy?s model, with the allometric value of m = 3/4 and the used parameterization, provided better adjustments to quality evaluators. Besides, the model softened the overestimation of parameter a, giving a direct interpretation of parameter b, with the lowest values for curvature measurements, mainly for the parametric ones, and provided more reliable adjustments. Von Bertalanffy?s model can be used in the description of the growth curves of meat-producing mammals.
650 $aAllometry
650 $aNonlinear models
650 $aRegressão Linear
653 $aAlometria
653 $aModelagem
653 $aModeling
653 $aModelo não linear
653 $aParameterization
653 $aParametrização
653 $aRegression
700 1 $aFERNANDES, T. J.
700 1 $aPEREIRA, A. A.
700 1 $aMEIRELLES, S. L. C.
700 1 $aCOSTA, A. C.
773 $tPesquisa Agropecuária Brasileira$gv. 54, e01162, jan./dez. 2019.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Meio Ambiente. |
|
Data corrente: |
20/04/2006 |
|
Data da última atualização: |
31/08/2015 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
JESUS, K. R. E. de; FALCAO, P. R. K.; NESHICH, G. |
|
Afiliação: |
KATIA REGINA EVARISTO DE JESUS, CNPMA; PAULA REGINA KUSER FALCAO, CNPTIA; GORAN NESHICH, CNPTIA. |
|
Título: |
Structural analyses of CRY 1Ac protein from Bacillus thuringiensis. |
|
Ano de publicação: |
2005 |
|
Fonte/Imprenta: |
In: X-MEETING INTERNATIONAL CONFERENCE OF THE AB3C, 1., 2005, Caxambu/MG. Presented posters. Caxambu/MG: Associação Brasileira de Bioinformática e Biologia Computacional, 2005. p. 133. |
|
Idioma: |
Inglês
Português |
|
Conteúdo: |
Cry protein is a delta endotoxin of the Bacillus family that provides an entomopatogenic activity to Bacilius thuringiensis. These proteins have a specific toxic activity against three types of insect larva: Lepdopthera, Diptera and Coleopthera. The insecticidal toxins are produced during spore formation. When an insect ingests these proteins they are activated by proteolytic cleavage. The toxin, after the ingestion, is solubitized by the alcalin pH in the digestive tract of the target insect. Once activated the endotoxin binds to the gut epithelium and causes cell lysis leading to death. These proteins are the active agents used in the majority of biorational pesticides and insect-resistant transgenic crops. This activated region of the delta endotoxin is composed of three structural domains. Domain I is involved in membrane insertion, pore formation and toxicity. The second and third domains are involved in receptor binding and specifically domain III is important in insect specificity. There are around 120 sequences of Cry toxins, and only five structures were deposited on the Protein Data Bank (PDB). There is a large interest in the toxin Cry 1Ac because it is commonly used to create transgenic plants with insect resistance. A theoretical model of the Cry lAc toxin was obtained on the basis of the coordinates of the insecticidal protein Cry lAa (PDB code:lciy.pdb) [1] as a template. The high sequence identity (73%) and a good correlation coefficient obtained from the elctron density server [2] indicates that 1ciy structure could be used as a template. The model corresponds to residues 33-618 of the primary structure and consists of domains I, II and III. The sequence of domain I is highly conserved, while domain II and III have the lower sequence similarity. The 3D model was construct using Modeller v7.7 [3]. Aimed at verifying whether the amino acid differences in domains II and III could be responsible for insect specifícity, this two structures were structurally aligned and compared with the Sting protein structure analysis program. Knowing that each amino acid substitution could potentially affect the protein structure and function, these amino acids were mapped and evaluated according to: conservation, change in solvent accessibility, side-chain volume change, effect on amino-acid interactions, protein electrostatics, and physicochemical properties of amino acids. Such approach can open a new insight into understanding of specificity that Cry protein has for receptors in plant pests and can help in the design of mutagenesis experiments aimed to elucidate the mechanism of action of the CrylAc toxin. MenosCry protein is a delta endotoxin of the Bacillus family that provides an entomopatogenic activity to Bacilius thuringiensis. These proteins have a specific toxic activity against three types of insect larva: Lepdopthera, Diptera and Coleopthera. The insecticidal toxins are produced during spore formation. When an insect ingests these proteins they are activated by proteolytic cleavage. The toxin, after the ingestion, is solubitized by the alcalin pH in the digestive tract of the target insect. Once activated the endotoxin binds to the gut epithelium and causes cell lysis leading to death. These proteins are the active agents used in the majority of biorational pesticides and insect-resistant transgenic crops. This activated region of the delta endotoxin is composed of three structural domains. Domain I is involved in membrane insertion, pore formation and toxicity. The second and third domains are involved in receptor binding and specifically domain III is important in insect specificity. There are around 120 sequences of Cry toxins, and only five structures were deposited on the Protein Data Bank (PDB). There is a large interest in the toxin Cry 1Ac because it is commonly used to create transgenic plants with insect resistance. A theoretical model of the Cry lAc toxin was obtained on the basis of the coordinates of the insecticidal protein Cry lAa (PDB code:lciy.pdb) [1] as a template. The high sequence identity (73%) and a good correlation coefficient obtained from the elc... Mostrar Tudo |
|
Palavras-Chave: |
Bioinformática. |
|
Thesagro: |
Bacillus thuringiensis; Proteina. |
|
Thesaurus NAL: |
Bioinformatics; Proteins. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/127545/1/2005RA-078.pdf
|
|
Marc: |
LEADER 03359nam a2200193 a 4500
001 2021515
005 2015-08-31
008 2005 bl uuuu u00u1 u #d
100 1 $aJESUS, K. R. E. de
245 $aStructural analyses of CRY 1Ac protein from Bacillus thuringiensis.$h[electronic resource]
260 $aIn: X-MEETING INTERNATIONAL CONFERENCE OF THE AB3C, 1., 2005, Caxambu/MG. Presented posters. Caxambu/MG: Associação Brasileira de Bioinformática e Biologia Computacional, 2005. p. 133.$c2005
520 $aCry protein is a delta endotoxin of the Bacillus family that provides an entomopatogenic activity to Bacilius thuringiensis. These proteins have a specific toxic activity against three types of insect larva: Lepdopthera, Diptera and Coleopthera. The insecticidal toxins are produced during spore formation. When an insect ingests these proteins they are activated by proteolytic cleavage. The toxin, after the ingestion, is solubitized by the alcalin pH in the digestive tract of the target insect. Once activated the endotoxin binds to the gut epithelium and causes cell lysis leading to death. These proteins are the active agents used in the majority of biorational pesticides and insect-resistant transgenic crops. This activated region of the delta endotoxin is composed of three structural domains. Domain I is involved in membrane insertion, pore formation and toxicity. The second and third domains are involved in receptor binding and specifically domain III is important in insect specificity. There are around 120 sequences of Cry toxins, and only five structures were deposited on the Protein Data Bank (PDB). There is a large interest in the toxin Cry 1Ac because it is commonly used to create transgenic plants with insect resistance. A theoretical model of the Cry lAc toxin was obtained on the basis of the coordinates of the insecticidal protein Cry lAa (PDB code:lciy.pdb) [1] as a template. The high sequence identity (73%) and a good correlation coefficient obtained from the elctron density server [2] indicates that 1ciy structure could be used as a template. The model corresponds to residues 33-618 of the primary structure and consists of domains I, II and III. The sequence of domain I is highly conserved, while domain II and III have the lower sequence similarity. The 3D model was construct using Modeller v7.7 [3]. Aimed at verifying whether the amino acid differences in domains II and III could be responsible for insect specifícity, this two structures were structurally aligned and compared with the Sting protein structure analysis program. Knowing that each amino acid substitution could potentially affect the protein structure and function, these amino acids were mapped and evaluated according to: conservation, change in solvent accessibility, side-chain volume change, effect on amino-acid interactions, protein electrostatics, and physicochemical properties of amino acids. Such approach can open a new insight into understanding of specificity that Cry protein has for receptors in plant pests and can help in the design of mutagenesis experiments aimed to elucidate the mechanism of action of the CrylAc toxin.
650 $aBioinformatics
650 $aProteins
650 $aBacillus thuringiensis
650 $aProteina
653 $aBioinformática
700 1 $aFALCAO, P. R. K.
700 1 $aNESHICH, G.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
