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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
12/09/2019 |
Data da última atualização: |
10/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
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. |
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. |
Título: |
Hydrolysis of the low gelatinization temperature Araucaria angustifolia pine seed starch. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Journal of Thermal Analysis and Calorimetry, v. 138, n. 2, p. 1269-1278, Oct. 2019. |
DOI: |
10.1007/s10973-019-08180-1 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Amido de pinhão modificado; DSC; Modified pinhão starch; RVA; Starch structural evaluation; TG-DTA. |
Thesaurus Nal: |
Thermal analysis. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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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Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
06/12/2016 |
Data da última atualização: |
02/03/2021 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
PONCIO, S.; SANTOS, J. de O.; PARANHOS, B. A. J. |
Afiliação: |
SÔNIA PONCIO; JÉSSICA DE OLIVEIRA SANTOS; BEATRIZ AGUIAR GIORDANO PARANHOS, CPATSA. |
Título: |
Parasitoides exóticos no controle biológico de Ceratitis capitata em goiabas. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 26.; CONGRESSO LATINO-AMERICANO DE ENTOMOLOGIA, 9., 2016, Maceió. Anais... Brasília, DF: Embrapa, 2016. |
Idioma: |
Português |
Conteúdo: |
A mosca do mediterrâneo, Ceratitis capitata (Diptera: Tephritidae), é a principal espécie de moscas-das-frutas presente no Submédio do Vale do São Francisco. Em altas infestações, uma das alternativas para o seu controle é a utilização de inimigos naturais, em especial, os parasitoides |
Palavras-Chave: |
Guava; Moscas-das-frutas; Vale do São Francisco. |
Thesagro: |
Controle biologico; Goiaba; Inseto. |
Thesaurus NAL: |
Biological control; Braconidae. |
Categoria do assunto: |
O Insetos e Entomologia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151321/1/Paranhos-3.pdf
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Marc: |
LEADER 01049nam a2200229 a 4500 001 2058062 005 2021-03-02 008 2016 bl uuuu u00u1 u #d 100 1 $aPONCIO, S. 245 $aParasitoides exóticos no controle biológico de Ceratitis capitata em goiabas.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 26.; CONGRESSO LATINO-AMERICANO DE ENTOMOLOGIA, 9., 2016, Maceió. Anais... Brasília, DF: Embrapa$c2016 520 $aA mosca do mediterrâneo, Ceratitis capitata (Diptera: Tephritidae), é a principal espécie de moscas-das-frutas presente no Submédio do Vale do São Francisco. Em altas infestações, uma das alternativas para o seu controle é a utilização de inimigos naturais, em especial, os parasitoides 650 $aBiological control 650 $aBraconidae 650 $aControle biologico 650 $aGoiaba 650 $aInseto 653 $aGuava 653 $aMoscas-das-frutas 653 $aVale do São Francisco 700 1 $aSANTOS, J. de O. 700 1 $aPARANHOS, B. A. J.
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