|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
23/11/2017 |
Data da última atualização: |
23/11/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SIQUEIRA, G. L. de A. de; HORNUNG, P. S.; SILVEIRA, A. C. da; LAZZAROTTO, S. R. da S.; CORDOBA, L. do P.; SCHNITZLER, E.; LAZZAROTTO, M. |
Afiliação: |
Geisa Liandra de Andrade de Siqueira, UEPG; Polyanna Silveira Hornung, UFPR; Ana Claudia da Silveira, UFPR; Simone Rosa da Silveira Lazzarotto, UEPG; Layse do Prado Cordoba, UFPR; Egon Schnitzler, UEPG; MARCELO LAZZAROTTO, CNPF. |
Título: |
Impact of treatment with HCL/alcoholic in the modification of corn starch. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Journal of Thermal Analysis and Calorimetry, v. 129, n. 3, p. 1705-1713, Dec. 2017. |
DOI: |
10.1007/s10973-017-6299-z |
Idioma: |
Inglês |
Conteúdo: |
The physical, chemical, or enzymatic modified starches are well suited for industrial applications. Acid hydrolysis changes the physicochemical properties without impairing the granular structure of starch. The acid hydrolysis in alcoholic solution can recover the granule starches after modification. Starch, the most abundant carbohydrate in grains, roots and tubers, is composed by amylose and amylopectin. Corn starch represents 85% of the global starch market. The aim of this study was to evaluate the effects of soft acid, acid?ethanol and acid methanol solutions, considering its application in the paper industry. One sample remained as native. The other six samples were modified with acid, acid?ethanol and acid? methanol solutions, at concentrations of 0.1 and 0.5 mol L-1 (hydrochloric acid). The acid treatment changed the thermal (TG) and rheological (RVA) properties of the corn starch. The TG/DTG results showed shifted (up to 8 C) stability temperature ranges for the samples treated with a higher concentration of HCl in ethanol and methanol solutions. The RVA results for final viscosity of the treated samples showed an intense reduction of 1405 cP related to the native sample. DSC curves demonstrated that the treatments slightly modified the gelatinization behavior of the starch. The micrographs showed small changes in granules average diameter size after the modification process. Acid hydrolysis did not change the crystalline pattern of corn starch, and its relative crystallinity was slightly affected. According to the results obtained for the acid/alcohol, modified starches present suitable properties for their application in the paper industry. MenosThe physical, chemical, or enzymatic modified starches are well suited for industrial applications. Acid hydrolysis changes the physicochemical properties without impairing the granular structure of starch. The acid hydrolysis in alcoholic solution can recover the granule starches after modification. Starch, the most abundant carbohydrate in grains, roots and tubers, is composed by amylose and amylopectin. Corn starch represents 85% of the global starch market. The aim of this study was to evaluate the effects of soft acid, acid?ethanol and acid methanol solutions, considering its application in the paper industry. One sample remained as native. The other six samples were modified with acid, acid?ethanol and acid? methanol solutions, at concentrations of 0.1 and 0.5 mol L-1 (hydrochloric acid). The acid treatment changed the thermal (TG) and rheological (RVA) properties of the corn starch. The TG/DTG results showed shifted (up to 8 C) stability temperature ranges for the samples treated with a higher concentration of HCl in ethanol and methanol solutions. The RVA results for final viscosity of the treated samples showed an intense reduction of 1405 cP related to the native sample. DSC curves demonstrated that the treatments slightly modified the gelatinization behavior of the starch. The micrographs showed small changes in granules average diameter size after the modification process. Acid hydrolysis did not change the crystalline pattern of corn starch, and its relative cry... Mostrar Tudo |
Palavras-Chave: |
Análise térmica; DSC; RVA; SEM; TG/DTG; XRD. |
Thesagro: |
Amido; Milho. |
Thesaurus Nal: |
Corn starch; Modified starch; Thermal analysis. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02617naa a2200337 a 4500 001 2080584 005 2017-11-23 008 2017 bl uuuu u00u1 u #d 024 7 $a10.1007/s10973-017-6299-z$2DOI 100 1 $aSIQUEIRA, G. L. de A. de 245 $aImpact of treatment with HCL/alcoholic in the modification of corn starch.$h[electronic resource] 260 $c2017 520 $aThe physical, chemical, or enzymatic modified starches are well suited for industrial applications. Acid hydrolysis changes the physicochemical properties without impairing the granular structure of starch. The acid hydrolysis in alcoholic solution can recover the granule starches after modification. Starch, the most abundant carbohydrate in grains, roots and tubers, is composed by amylose and amylopectin. Corn starch represents 85% of the global starch market. The aim of this study was to evaluate the effects of soft acid, acid?ethanol and acid methanol solutions, considering its application in the paper industry. One sample remained as native. The other six samples were modified with acid, acid?ethanol and acid? methanol solutions, at concentrations of 0.1 and 0.5 mol L-1 (hydrochloric acid). The acid treatment changed the thermal (TG) and rheological (RVA) properties of the corn starch. The TG/DTG results showed shifted (up to 8 C) stability temperature ranges for the samples treated with a higher concentration of HCl in ethanol and methanol solutions. The RVA results for final viscosity of the treated samples showed an intense reduction of 1405 cP related to the native sample. DSC curves demonstrated that the treatments slightly modified the gelatinization behavior of the starch. The micrographs showed small changes in granules average diameter size after the modification process. Acid hydrolysis did not change the crystalline pattern of corn starch, and its relative crystallinity was slightly affected. According to the results obtained for the acid/alcohol, modified starches present suitable properties for their application in the paper industry. 650 $aCorn starch 650 $aModified starch 650 $aThermal analysis 650 $aAmido 650 $aMilho 653 $aAnálise térmica 653 $aDSC 653 $aRVA 653 $aSEM 653 $aTG/DTG 653 $aXRD 700 1 $aHORNUNG, P. S. 700 1 $aSILVEIRA, A. C. da 700 1 $aLAZZAROTTO, S. R. da S. 700 1 $aCORDOBA, L. do P. 700 1 $aSCHNITZLER, E. 700 1 $aLAZZAROTTO, M. 773 $tJournal of Thermal Analysis and Calorimetry$gv. 129, n. 3, p. 1705-1713, Dec. 2017.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Florestas (CNPF) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registros recuperados : 52 | |
9. | | TOSI, H.; FARIA, V. P. de; GUTIERREZ, L. E.; SILVEIRA, A. C. Avaliação do capim-elefante, cultivar Taiwan A-148, como planta para ensilagem. Pesquisa Agropecuária Brasileira, Brasília, v.18, n.3, p. 295-299, mar. 1983. Título em inglês: Evaluation of elephant grass Taiwan A-148 cultivar for ensilage.Biblioteca(s): Embrapa Unidades Centrais. |
| |
10. | | ARRIGONI, M. B.; SILVEIRA, A. C.; FURLAN, L. R.; PARRE, C.; COSTA, C.; CURI, P. R. Avaliação da vinhaça Liquida em substituição a água na terminação de bovinos em confinamento. 2. Parâmetros e etológicos e perfil metabólico. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 29, n. 1, p. 133-137. jan. 1994. Título em inglês: Evaluations of canes stillage in sustitution feedlot. 2. Behavioer and metabolic profile.Biblioteca(s): Embrapa Unidades Centrais. |
| |
11. | | TOSI, H.; FARIA, V. P. de; SILVEIRA, A. C.; PEREIRA, R. L. Avaliação de leguminosas forrageiras de origem tropical como plantas para ensilagem. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 10, n. 4, p. 19-22, 1975. (Zootecnia). Título em inglês: Evaluation of tropical legumes as plants for the ensilagem.Biblioteca(s): Embrapa Unidades Centrais. |
| |
14. | | CURI, R. A.; CHARDULO, L. A. L.; SILVEIRA, A. C.; OLIVEIRA, H. N. de. Alternative genotyping method for the single nucleotide polymorphism A2959G (AF159246) of the bovine CAST gene. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 43, n. 5, p. 657-659, maio 2008 Notas Científicas.
Títulos em português: Método alternativo de genotipagem do polimorfismo de nucleotídeo único A2959G (AF159246) do gene CAST bovino.Biblioteca(s): Embrapa Unidades Centrais. |
| |
16. | | MAGLIOCCA, F. de C.; SILVEIRA, A. C.; FURLAN, L. R.; ARRIGONI, M. de B.; COSTA, C. Efeito da niacina e da monensina sódica no desempenho de novilhos em confinamento. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 29, n. 6, p. 983-988. jun. 1994. Título em inglês: The effect niacin and monensin of the performance of young bulls et feedlot.Biblioteca(s): Embrapa Unidades Centrais. |
| |
19. | | PEZZATO, A. C.; SILVEIRA, A. C.; FURLAN, L. R.; PEZZATO, L. E.; COSTA, C. Estudo do valor nutritivo do farelo de guandu (Cajanus cajan (L.) Millps) var. fava larga na alimentação de frangos de corte. 1. Avaliação do tratamento térmico. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 5, p. 569-576, maio 1995. Título em inglês: Study on the nutrition value of pigeon pea meal (Cajanus cajan (L.) Millps) in broiler feed.Biblioteca(s): Embrapa Unidades Centrais. |
| |
Registros recuperados : 52 | |
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|