title: Effects of gamma irradiation on physicochemical properties of native and acetylated wheat starches.
abstract: Effects of gamma irradiation on the physicochemical and crystalline properties of the native and acetylated wheat starches were investigated. Peak, hot paste, cool paste and setback viscosities of both native and acetylated wheat starches decreased continuously and significantly with the increase of the irradiation dose, whereas breakdown viscosity increased after irradiation. However, gamma irradiation only exerted slight effects on thermal and retrogradation properties of both native and acetylated wheat starches. X-ray diffraction and fourier transform infrared spectroscopy revealed that acetylation modification had considerable effects on the molecular structure of wheat starch, and the crystallinity of both untreated and acetylated starches increased slightly with the increase of irradiation dose. However, the V-type crystallinity of amylose-lipid complex was not affected by gamma irradiation treatments with doses up to 9kGy.
authors.affiliation: Institute of Nuclear Agricultural Sciences, Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou, 310029, China.
authors.forename: Xiangli
authors.initials: X
authors.lastname: Kong
authors.affiliation: Institute of Nuclear Agricultural Sciences, Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou, 310029, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zhongquan
authors.initials: Z
authors.lastname: Sui
authors.affiliation: Institute of Nuclear Agricultural Sciences, Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou, 310029, China. Electronic address: jsbao@zju.edu.cn.
authors.forename: Jinsong
authors.initials: J
authors.lastname: Bao
mesh_terms: D000107:Acetylation; D055598:Chemical Phenomena; D005720:Gamma Rays; D009824:Ointments; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D014908:Triticum / Q000737:chemistry*
chemical_list: D009824:Ointments; D013213:Starch
keywords: Acetylation; Gamma irradiation; Physicochemical properties; Wheat starch