title: Effect of acid hydrolysis combined with heat moisture treatment on structure and physicochemical properties of corn starch.
abstract: Modification of starch led to new products with new desirable properties. Corn starch samples modified by acid hydrolysis combined with heat moisture treatment (AH-HMT) were made by changing pH, moisture content and treated temperature. After modification, swelling power at temperature higher than 75 °C of corn starches decreased while solubility of the starches increased. After AH-HMT, pasting temperature (PT) of all treated starch samples increased. But lower peak viscosity (PKV), trough viscosity (TV) and break down (BD) of most treated starch samples were observed. AH-HMT increased the gel hardness of all treated starches. And the biggest hardness of modified starch gel was 148.419 g, improving 93.471 g compared with native starch gel. The melting temperatures (To, Tp, Tc) of modified starch increased, but the melting range and △H decreased. The X-ray pattern remained practically unchanged with or without AH-HMT. Acid hydrolysis combined with heat moisture treatment (AH-HMT) improved the functional properties of corn starch.
authors.affiliation: School of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, Shandong Province China.
authors.forename: Qingjie
authors.initials: Q
authors.lastname: Sun
authors.affiliation: School of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, Shandong Province China.
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, Shandong Province China.
authors.forename: Fumei
authors.initials: F
authors.lastname: Si
authors.affiliation: School of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, Shandong Province China.
authors.forename: Liu
authors.initials: L
authors.lastname: Xiong
keywords: Acid hydrolysis (AH); Corn starch; Heat moisture treatment (HMT); Physicochemical properties; Structure