title: Rheological and gelation properties of rice starch modified with 4-alpha-glucanotransferase.
abstract: Rheological measurements were performed to characterize rice starch modified with 4-alpha-glucanotransferase (4alphaGTase) isolated from Thermus scotoductus, in terms of effects of the enzyme and starch concentration on flow behavior, gel strength, and melting and gelling kinetics of the modified rice starch. Consistency index decreased and flow behavior index increased with the level of enzyme treatment, and at high level of enzyme treatment, it demonstrated Bingham plastic behavior. As the level of enzyme decreased and the starch concentration increased, gelation time decreased and the final gel strength increased significantly. Regardless of treatment variables, all the modified starch gels melted at similar temperature.
authors.affiliation: Department of Food and Nutrition, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Kwang Yeon
authors.initials: KY
authors.lastname: Lee
authors.forename: Yong-Ro
authors.initials: YR
authors.lastname: Kim
authors.forename: Kwan Hwa
authors.initials: KH
authors.lastname: Park
authors.forename: Hyeon Gyu
authors.initials: HG
authors.lastname: Lee
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry*; D005782:Gels / Q000737:chemistry; D006004:Glycogen Debranching Enzyme System / Q000737:chemistry*; D007700:Kinetics; D012275:Oryza / Q000737:chemistry*; D012212:Rheology; D013213:Starch / Q000737:chemistry*; D013824:Thermus / Q000201:enzymology*
chemical_list: D001426:Bacterial Proteins; D005782:Gels; D006004:Glycogen Debranching Enzyme System; D013213:Starch; C020569:4 alpha-glucanotransferase