title: Preparation and characterization of a novel pH-response dietary fiber: chitosan-coated konjac glucomannan.
abstract: The purpose of this study was to prepare a kind of novel pH-response dietary fiber from chitosan-coated konjac glucomannan (KGM) powders (KGM/Chitosan or K/C powders) by a physical grind method. The K/C powders were selectively soluble in aqueous solutions of different pH. Meanwhile, the coated chitosan could largely decrease the viscosity of KGM in neutral condition, which is the main limitation for KGM application in food industry. Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), swelling ability and rheological measurements were utilized to characterize the performance of K/C powders. K/C powders exhibited much higher viscosity and swelling ability in acidic condition than in neutral condition. Therefore, this study will extend the application of KGM in food industry and in other pH-specific applications as well.
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
authors.forename: Xiaoguo
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Weiping
authors.initials: W
authors.lastname: Jin
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Geng
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Ye
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Jieqiong
authors.initials: J
authors.lastname: Lei
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: libinfood@mail.hzau.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.affiliation: Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: wangling@mail.hzau.edu.cn.
authors.forename: Ling
authors.initials: L
authors.lastname: Wang
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D004043:Dietary Fiber; D004548:Elasticity; D006863:Hydrogen-Ion Concentration; D008351:Mannans / Q000737:chemistry*; D012212:Rheology; D013499:Surface Properties; D014783:Viscosity
chemical_list: D004043:Dietary Fiber; D008351:Mannans; C022901:(1-6)-alpha-glucomannan; D048271:Chitosan
keywords: Chitosan; Ethanol (PubChem CID: 702); Hydrochloric acid (PubChem CID: 313); Konjac glucomannan; Rheological properties; Sodium carbonate (PubChem CID: 10340); Swelling behavior; pH-response