Effect of enzymatic hydrolysis on some physicochemical properties of root and tuber granular starches
| dc.creator | Thaís de Souza ROCHA | |
| dc.creator | Ana Paula de Almeida CARNEIRO | |
| dc.creator | Celia Maria Landi FRANCO | |
| dc.date | 2010 | |
| dc.date.accessioned | 2026-07-07T04:18:50Z | |
| dc.description | Enzymatic hydrolysis of granular starch is an important tool to provide information about gr Keywords: αanule structure. Cassava, sweet potato, Peruvian carrot, and potato starches were hydrolyzed by bacterial α-amylase at 37 °C for 48 hours, and the physicochemical properties of the residues from hydrolysis were determined. Cassava starch was the most susceptible to enzyme displaying 20.9% of hydrolysis, whereas potato starch was the most resistant with 5.9%. The granule average size varied from 10.8 to 23.4 μm for Peruvian carrot and potato starches, respectively. With the use of SEM, a smooth granule surface was observed for all native starches. Cassava and sweet potato starches displayed an A-type X-ray diffraction pattern, while Peruvian carrot and potato starches showed a B-type pattern. After hydrolysis, cassava, sweet potato, and Peruvian carrot starches showed some well degraded granules, whereas potato starch presented a slight sign of degradation. The amylose content of the starches decreased with hydrolysis for cassava, sweet potato, and Peruvian carrot starches and was kept unchanged for the potato starch. As expected, intrinsic viscosity and pasting properties decreased for all hydrolyzed starches. There is no difference between thermal properties of native and hydrolyzed starches. These results suggested that hydrolysis occurred in amorphous and crystalline areas of the granules. The B type diffraction pattern in conjunction with the big granule size of the potato starch may have contributed to the greatest resistance of this starch to hydrolysis. | |
| dc.format | application/pdf | |
| dc.identifier | 0101-2061 | |
| dc.identifier | https://www.redalyc.org/articulo.oa?id=395940100039 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/457509 | |
| dc.language | en | |
| dc.publisher | Sociedade Brasileira de Ciência e Tecnologia de Alimentos | |
| dc.relation | http://www.redalyc.org/revista.oa?id=3959 | |
| dc.rights | Ciência e Tecnologia de Alimentos | |
| dc.source | Ciência e Tecnologia de Alimentos (Brasil) Num.2 Vol.30 | |
| dc.subject | Agrociencias | |
| dc.title | Effect of enzymatic hydrolysis on some physicochemical properties of root and tuber granular starches | |
| dc.type | artículo científico |