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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
12/09/2019 |
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Data da última atualização: |
10/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SIQUEIRA, G. L. de A. de; SILVEIRA, A. C. da; LAZZAROTTO, S. R. da S.; GODOY, R. C. B. de; SCHNITZLER, E.; LAZZAROTTO, M. |
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Afiliação: |
Geisa Liandra de Andrade de Siqueira, Mestranda da UEPG; Ana Claudia da Silveira, UFPR; Simone Rosa da Silveira Lazzarotto, Doutoranda da UEPG; ROSSANA CATIE BUENO DE GODOY, CNPF; Egon Schnitzler, UEPG; MARCELO LAZZAROTTO, CNPF. |
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Título: |
Hydrolysis of the low gelatinization temperature Araucaria angustifolia pine seed starch. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Thermal Analysis and Calorimetry, v. 138, n. 2, p. 1269-1278, Oct. 2019. |
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DOI: |
10.1007/s10973-019-08180-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Starch is the most abundant carbohydrate found in grains, roots and tubers. Modified starches are employed to overcome most of native starch limitations in industrial applications. Pinhão is the seed of Araucaria angustifolia and starch is approximately 36% of its composition. Acid hydrolysis changes the starch physicochemical properties without impairing the granular structure. The native and hydrochloric acid- modified (0.1 and 0.5 mol L−1) pinhão starches were investigated using thermal (TG-DTA and DSC), rheological (RVA), structural (XRD and SEM) and statistical analysis (ANOVA and Tukey). The aim of this study was to evaluate the effects of acid modification of pinhão starches in aqueous solutions. The starches were chosen because of their low gelatinization temperature (below 60 °C). TG-DTA results in air atmosphere showed that treated samples presented higher thermal stability. The same analysis using nitrogen atmosphere showed similarities between the samples. DSC results indicate that highest acid concentrations promoted crystallinity reduction and losses in the internal structure of the granule. The genetic sources demonstrated different behaviors. The viscosity parameters decreased with the intensity of acid treatment. The XRD identified the type C pattern for the starches and the relative crystallinity increased according to the intensity of the acid hydrolysis. Superficial changes in the granules were observed by SEM. Therefore, modified pinhão starch has potential use for industrial applications. Further studies are necessary to extend these applications. MenosStarch is the most abundant carbohydrate found in grains, roots and tubers. Modified starches are employed to overcome most of native starch limitations in industrial applications. Pinhão is the seed of Araucaria angustifolia and starch is approximately 36% of its composition. Acid hydrolysis changes the starch physicochemical properties without impairing the granular structure. The native and hydrochloric acid- modified (0.1 and 0.5 mol L−1) pinhão starches were investigated using thermal (TG-DTA and DSC), rheological (RVA), structural (XRD and SEM) and statistical analysis (ANOVA and Tukey). The aim of this study was to evaluate the effects of acid modification of pinhão starches in aqueous solutions. The starches were chosen because of their low gelatinization temperature (below 60 °C). TG-DTA results in air atmosphere showed that treated samples presented higher thermal stability. The same analysis using nitrogen atmosphere showed similarities between the samples. DSC results indicate that highest acid concentrations promoted crystallinity reduction and losses in the internal structure of the granule. The genetic sources demonstrated different behaviors. The viscosity parameters decreased with the intensity of acid treatment. The XRD identified the type C pattern for the starches and the relative crystallinity increased according to the intensity of the acid hydrolysis. Superficial changes in the granules were observed by SEM. Therefore, modified pinhão starch has ... Mostrar Tudo |
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Palavras-Chave: |
Amido de pinhão modificado; DSC; Modified pinhão starch; RVA; Starch structural evaluation; TG-DTA. |
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Thesaurus Nal: |
Thermal analysis. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02481naa a2200277 a 4500
001 2112143
005 2019-12-10
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1007/s10973-019-08180-1$2DOI
100 1 $aSIQUEIRA, G. L. de A. de
245 $aHydrolysis of the low gelatinization temperature Araucaria angustifolia pine seed starch.$h[electronic resource]
260 $c2019
520 $aStarch is the most abundant carbohydrate found in grains, roots and tubers. Modified starches are employed to overcome most of native starch limitations in industrial applications. Pinhão is the seed of Araucaria angustifolia and starch is approximately 36% of its composition. Acid hydrolysis changes the starch physicochemical properties without impairing the granular structure. The native and hydrochloric acid- modified (0.1 and 0.5 mol L−1) pinhão starches were investigated using thermal (TG-DTA and DSC), rheological (RVA), structural (XRD and SEM) and statistical analysis (ANOVA and Tukey). The aim of this study was to evaluate the effects of acid modification of pinhão starches in aqueous solutions. The starches were chosen because of their low gelatinization temperature (below 60 °C). TG-DTA results in air atmosphere showed that treated samples presented higher thermal stability. The same analysis using nitrogen atmosphere showed similarities between the samples. DSC results indicate that highest acid concentrations promoted crystallinity reduction and losses in the internal structure of the granule. The genetic sources demonstrated different behaviors. The viscosity parameters decreased with the intensity of acid treatment. The XRD identified the type C pattern for the starches and the relative crystallinity increased according to the intensity of the acid hydrolysis. Superficial changes in the granules were observed by SEM. Therefore, modified pinhão starch has potential use for industrial applications. Further studies are necessary to extend these applications.
650 $aThermal analysis
653 $aAmido de pinhão modificado
653 $aDSC
653 $aModified pinhão starch
653 $aRVA
653 $aStarch structural evaluation
653 $aTG-DTA
700 1 $aSILVEIRA, A. C. da
700 1 $aLAZZAROTTO, S. R. da S.
700 1 $aGODOY, R. C. B. de
700 1 $aSCHNITZLER, E.
700 1 $aLAZZAROTTO, M.
773 $tJournal of Thermal Analysis and Calorimetry$gv. 138, n. 2, p. 1269-1278, Oct. 2019.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
16/05/2012 |
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Data da última atualização: |
16/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
ARAÚJO, R. O. de; MARCONDES, C. R.; DAME, M. C. F.; GARNERO, A. del V.; GUNSKI, R. J.; EVERLING, D. M.; RORATO, P. R. N. |
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Afiliação: |
RONYERE OLEGÁRIO DE ARAÚJO, UFSM/SANTA MARIA, RS; CINTIA RIGHETTI MARCONDES, CPPSE; MARIA CECILIA FLORISBAL DAME, CPACT; ANALÍA DEL VALLE GARNERO, UNIVERSIDADE FEDERAL DO PAMPA/SÃO GABRIEL; RICARDO JOSÉ GUNSKI, UNIVERSIDADE FEDERAL DO PAMPA/SÃO GABRIEL; DIONÉIA MAGDA EVERLING, UNIVERSIDADE FEDERAL DO PAMPA/SÃO GABRIEL; PAULO ROBERTO NOGARA RORATO, UNIVERSIDADE FEDERAL DE SANTA MARIA/SANTA MARIA. |
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Título: |
Classical nonlinear models to describe the growth curve for Murrah buffalo breed. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Ciência Rural, Santa Maria, v. 42, n. 3, p. 520-525, mar. 2012. |
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DOI: |
https://doi.org/10.1590/S0103-84782012000300022 |
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Idioma: |
Inglês |
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Conteúdo: |
With the objective of to adjust nonlinear models for the growth curves for a buffaloes herd raised in floodable lands in Rio Grande do Sul state, monthly records measured from birth to two years-old of 64 males and 63 females born between 1982 and 1989 were used. The models used were: Von Bertalanffy, Brody, Gompertz and Logistic. The parameters were estimated by NLIN procedure and the criteria used to evaluate the adjustment given by the models were: asymptotic standard deviation; coefficient of determination; average absolute deviation of residues and asymptotic index. Von Bertalanffy and Brody models overestimated the male asymptotic weight (A) in 15.9 and 171.3kg, respectively, and the Gompertz and Logistic models underestimated it in 4.5 and 13.4kg, respectively. For females, the Logistic model underestimated the asymptotic weight (-2.09kg), and Gompertz, Von Bertalanffy and Brody overestimated this parameter in 8.04, 17.7, and 280.33kg, respectively. The biggest average deviation was estimated by Brody model for both sexes, characterizing the biggest index. Considering the criteria, it is recommended the Gompertz and Logistic models for adjust females and males Murrah buffaloes breed growth curves. |
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Palavras-Chave: |
Asymptotic weight; Buffalo; Maturation rate. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/59408/1/PROCI-2012.00026.pdf
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Marc: |
LEADER 01972naa a2200241 a 4500
001 1924695
005 2023-02-16
008 2012 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/S0103-84782012000300022$2DOI
100 1 $aARAÚJO, R. O. de
245 $aClassical nonlinear models to describe the growth curve for Murrah buffalo breed.$h[electronic resource]
260 $c2012
520 $aWith the objective of to adjust nonlinear models for the growth curves for a buffaloes herd raised in floodable lands in Rio Grande do Sul state, monthly records measured from birth to two years-old of 64 males and 63 females born between 1982 and 1989 were used. The models used were: Von Bertalanffy, Brody, Gompertz and Logistic. The parameters were estimated by NLIN procedure and the criteria used to evaluate the adjustment given by the models were: asymptotic standard deviation; coefficient of determination; average absolute deviation of residues and asymptotic index. Von Bertalanffy and Brody models overestimated the male asymptotic weight (A) in 15.9 and 171.3kg, respectively, and the Gompertz and Logistic models underestimated it in 4.5 and 13.4kg, respectively. For females, the Logistic model underestimated the asymptotic weight (-2.09kg), and Gompertz, Von Bertalanffy and Brody overestimated this parameter in 8.04, 17.7, and 280.33kg, respectively. The biggest average deviation was estimated by Brody model for both sexes, characterizing the biggest index. Considering the criteria, it is recommended the Gompertz and Logistic models for adjust females and males Murrah buffaloes breed growth curves.
653 $aAsymptotic weight
653 $aBuffalo
653 $aMaturation rate
700 1 $aMARCONDES, C. R.
700 1 $aDAME, M. C. F.
700 1 $aGARNERO, A. del V.
700 1 $aGUNSKI, R. J.
700 1 $aEVERLING, D. M.
700 1 $aRORATO, P. R. N.
773 $tCiência Rural, Santa Maria$gv. 42, n. 3, p. 520-525, mar. 2012.
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Embrapa Pecuária Sudeste (CPPSE) |
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