title: Effect of thermal processing on the physicochemical properties of chestnut starch and textural profile of chestnut kernel.
abstract: The present study focused on the effect of thermal processing on the physicochemical properties of chestnut starch and textural profile of chestnut kernel. After thermal processing, the total starch content in both boiled and roasted chestnuts decreased significantly (P<0.05), while the amylose content of boiled chestnut increased and that of roasted chestnut remained stable. The granular microstructure of the starch in cooked chestnut was gradually destroyed during the thermal processing. The starch in cooked chestnut still exhibited C-type X-ray diffraction patterns, but the intensity of diffraction peaks and the crystallinity were obviously declined compared with those of fresh chestnut. Textural profile analysis of chestnut starch gel and chestnut kernel showed that the main textural characterizations of roasted chestnut were higher than those of boiled chestnuts. These results are helpful for better understanding the texture change in fresh, boiled and roasted chestnuts, which indicated that roasting is an alternative industrial thermal processing method for chestnut kernel.
authors.affiliation: Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Process and Safety, Beijing Forestry University, Beijing 100083, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Kan
authors.affiliation: Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Process and Safety, Beijing Forestry University, Beijing 100083, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.affiliation: Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Process and Safety, Beijing Forestry University, Beijing 100083, China.
authors.forename: Shuangshuang
authors.initials: S
authors.lastname: Xie
authors.affiliation: Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Process and Safety, Beijing Forestry University, Beijing 100083, China.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Hu
authors.affiliation: Beijing Center for Physical and Chemical Analysis, Beijing Food Safety Analysis and Testing Engineering Research Center, Beijing 100089, China.
authors.forename: Yanwen
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Process and Safety, Beijing Forestry University, Beijing 100083, China. Electronic address: ouyangjie@bjfu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Ouyang
mesh_terms: D000688:Amylose / Q000032:analysis; D055598:Chemical Phenomena; D029962:Fagaceae / Q000737:chemistry*; D005511:Food Handling; D013213:Starch / Q000737:chemistry*; D013696:Temperature
chemical_list: D013213:Starch; D000688:Amylose
keywords: Chestnut; Kernel; Physicochemical property; Starch; Texture profile; Thermal processing