Data/hora: 03/06/2024 02:47:01

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 01/06/2017
Data da última atualização: | 23/11/2017
Autoria: | HORNUNG, P. S.; CORDOBA, L. do P.; LAZZAROTTO, S. R. da S.; SCHNITZLER, E.; LAZZAROTTO, M.; RIBANI, R. H.
Afiliação: | Polyanna Silveira Hornung, UFPR; Layse do Prado Cordoba, UFPR; Simone Rosa da Silveira Lazzarotto, Doutoranda da UEPG; Egon Schnitzler, UEPG; MARCELO LAZZAROTTO, CNPF; Rosemary Hoffmann Ribani, UFPR.
Título: | Brazilian dioscoreaceas starches: thermal, structural and rheological properties compared to commercial starches.
Ano de publicação: | 2017
Fonte/Imprenta: | Journal of Thermal Analysis and Calorimetry, v. 127, n. 3, p. 1869-1877, Mar. 2017.
DOI: | 10.1007/s10973-016-5747-5
Idioma: | Inglês
Conteúdo: | Determination of the characteristics of native starches is crucial in order to select their best application in various industrial fields. Thus, two different types of nontraditional native starches from the Dioscoreaceas species (Dioscorea sp. and Dioscorea piperifolia Humb. var. Wild) were studied regarding their thermal, structural and rheological properties. The results were contrasted with traditional commercial starch sources (potato, cassava and corn). From the thermogravimetric results (TG/DTG), D. piperifolia starch obtained the highest thermal stability of the samples, except for potato starch. Furthermore, using differential scanning calorimetry and viscoamylograph profiles (RVA), it was found that the Dioscoreaceas starches presented a higher onset (To) temperature and susceptibility to retrogradation. They also showed lower values in relation to relative crystallinity, which was calculated from their X-ray patterns and tendency to white (L*) colour. The shapes of the Discoreaceas starch granules were determined using electron microscopy; it was found that as the potato starch the Dioscoreaceas starches showed a wide range of particle size.
Palavras-Chave: | Propriedade estrutural; Propriedade térmica; Rheological behaviour; Thermogravimetric profile; Unusual starch source; Yam native starch.
Thesagro: | Amido; Propriedade reológica.
Thesaurus Nal: | Starch.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (55814-1) - UPC - AP - DD -  -  -  - DIS