title: Effect of frozen storage on the foaming properties of wheat gliadin.
abstract: In this study, the effect of frozen storage on the foaming properties of wheat gliadin was investigated and further elucidated by evaluating its physicochemical changes. The foaming volumes of gliadin solution decreased while the foaming stability increased during the frozen storage. This was directly attributed to decreased gliadin content and increased foam density and protein concentration involved in the foams. A more rigid conformation was observed when the frozen storage time increased: the α-helix structure increased at the cost of β-sheet and unordered structure with the decreased surface hydrophobicity and increased surface tension of gliadin aqueous solutions. The percentage of γ-gliadin within gliadin foams gradually decreased, indicating that γ-gliadin was the most sensitive to freezing and the main contributor to the weakened foaming properties during the frozen storage. This study extended the knowledge of gliadin deterioration upon frozen storage and might contribute to the better understanding of frozen dough quality loss.
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China. Electronic address: whiteblair1991@yahoo.com.
authors.forename: Pei
authors.initials: P
authors.lastname: Wang
authors.affiliation: School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China.
authors.forename: Han
authors.initials: H
authors.lastname: Tao
authors.affiliation: School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China.
authors.forename: Fengfeng
authors.initials: F
authors.lastname: Wu
authors.affiliation: School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China.
authors.forename: Na
authors.initials: N
authors.lastname: Yang
authors.affiliation: Department of Food, Nutrition and Packaging Sciences, Clemson University, Clemson, SC 29634, USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China.
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Jin
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China. Electronic address: xmxu@jiangnan.edu.cn.
authors.forename: Xueming
authors.initials: X
authors.lastname: Xu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002942:Circular Dichroism; D061353:Food Storage; D005615:Freezing; D005903:Gliadin / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D012996:Solutions; D014908:Triticum / Q000737:chemistry*
chemical_list: D012996:Solutions; D005903:Gliadin
keywords: Foaming property; Frozen storage; Secondary structure; Surface hydrophobicity; Surface tension; Wheat gliadin