title: Preparation and slowly digestible properties of β-cyclodextrins (β-CDs)-modified starches.
abstract: The β-cyclodextrin (β-CD)-, maltosyl-β-CD (Mal-β-CD)- and hydroxypropyl-β-CD (HP-β-CD)-modified rice starches were prepared and their slowly digestible properties were estimated. The results showed that β-CD, Mal-β-CD and HP-β-CD significantly increased the slow digestibility of β-CDs-modified starches (P<0.05). The optimum conditions for the modification were obtained: amylose, 4.76%; free lipids, 0.24%; β-CD, Mal-β-CD and HP-β-CD, 3%; water, 80%; and equilibrium temperature, 25°C. The maximum yield of slowly digestible starch (SDS) was 52.1% when β-CD was used as a denaturant (β-CD, 3%; water, 80%; and equilibrium temperature, 25°C). This higher SDS yield was probably attributed to the better compatibility of β-CD and starch molecules. Furthermore, β-CD-, Mal-β-CD- and HP-β-CD-modified starches generated slowly digestible curves during enzymatic digestion and showed the intermediate predicted glycemic indexes (pGI) of 58.7, 69.1 and 70.3, respectively. These findings suggest that the β-CDs-induced modification is one of promising techniques for preparing the SDS products in food and pharmaceutical industries.
authors.affiliation: The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Jinling
authors.initials: J
authors.lastname: Zhan
authors.forename: Yaoqi
authors.initials: Y
authors.lastname: Tian
authors.forename: Qunyi
authors.initials: Q
authors.lastname: Tong
mesh_terms: D005087:Glucan 1,4-alpha-Glucosidase / Q000378:metabolism; D038321:Glycemic Index; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D000516:alpha-Amylases / Q000378:metabolism; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D047392:beta-Cyclodextrins; D013213:Starch; D000516:alpha-Amylases; D005087:Glucan 1,4-alpha-Glucosidase