Characterization of Chestnut (Castanea sativa, Mill) starch for industrial utilization

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Characterization of Chestnut (Castanea sativa, Mill) starch for industrial utilization

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dc.contributor.author Demiate, Ivo Mottin
dc.contributor.author Oetterer, Marília
dc.contributor.author Wosiacki, Gilvan
dc.date.accessioned 2011-08-17T19:38:08Z
dc.date.available 2011-08-17T19:38:08Z
dc.date.issued 2001-03
dc.identifier.citation DEMIATE, I. M.; OETTERER, M. WOSIACKI, G. Characterization of chestnut (Castanea sativa, mill) starch for industrial utilization. Braz. Arch. Biol. Technol., Curitiba, v. 44, n. 1, p. 69-78, mar. 2001. pt_BR
dc.identifier.issn 1516-8913
dc.identifier.uri http://ri.uepg.br:8080/riuepg//handle/123456789/581
dc.description.abstract Studies were conducted to characterize the chestnut and its starch. Chemical composition of the chestnuts showed high level of starch. Moisture level in the raw nuts was around 50g/100g in wet basis and starch content, around 80g/100g in dry basis; other nut flour components were protein (5.58 g/100g), lipid (5.39 g/100g), crude fiber (2.34 g/100g) and ash (2.14 g/100g). Starch fraction was chemically characterized in order to identify the granule quality as compared with those of cassava and corn. This fraction showed more lipids and proteins than the other starches. Chestnut starch granules showed peculiar shape, smaller than the control starches and low amount of damaged units. Chemical composition concerning amylose : amylopectin ratio was intermediate to that presented by cassava and corn starch granules. Water absorption at different temperatures as well as solubility were also intermediate but closer to that presented by cassava granules. The same behavior was observed in the interaction with dimethyl-sulfoxide. Native starch granules and those submitted to enzymatic treatment with commercial a-amylase and also with enzymes from germinated wheat were observed by scanning electronic microscopy. Water suspensions of chestnut starch granules were heated to form pastes that were studied comparatively to those obtained with cassava and corn starches. Viscographic pattern of chestnut starch pastes showed a characteristic profile with high initial viscosity but peak absence, high resistance to mechanical stirring under hot conditions and high final viscosity. There was no way to compare it with the paste viscographic profiles obtained with the control starches. Chestnut starch pastes were stable down to pH 4 but unstable at pH 3. The water losses observed in the chestnut starch pastes after freeze-thaw cycles showed more similarity to the pattern observed in corn starch pastes as well as clarity and strength of the gel. In general the results showed that chestnut pastes functional properties are intermediate to those of the cassava and corn starch pastes. pt_BR
dc.language.iso en_US pt_BR
dc.subject Castanea sativa pt_BR
dc.subject Starch pt_BR
dc.subject Granules pt_BR
dc.subject Pastes pt_BR
dc.subject Sweet Chestnut pt_BR
dc.subject Cassava pt_BR
dc.title Characterization of Chestnut (Castanea sativa, Mill) starch for industrial utilization pt_BR
dc.type Article pt_BR


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