title: Blasting extrusion processing: the increase of soluble dietary fiber content and extraction of soluble-fiber polysaccharides from wheat bran.
abstract: In this study, soluble dietary fiber (SDF) content of wheat bran was significantly increased from 9.82 ± 0.16 (w/w, %) to 16.72 ± 0.28 (w/w, %) by a novel blasting extrusion processing with enhanced water retention capacity and the swelling capacity. In addition, a water-soluble polysaccharide (WBP) was isolated and extracted from extruded SDF. WBP was successfully purified from SDF by column chromatography systems with the average molecular weight (Mw) of 4.7 × 10(4)Da, containing arabinose, xylose, glucose, and galactose. With the molar ratio of 0.76:0.99:1.00:0.12. Our results suggest that WBP owned 1 → 2, 1 → 3, 1 → 2, 6 and 1 → 4, 1 → 4, 6 glycosidic bonds in the absence of 1 →, 1 → 6 glycosidic bonds. In vitro antioxidant assays (DPPH, ABTS+ radical scavenging capacities, and ferric ion reducing capacity) demonstrated that WBP possesses good antioxidant capacity, and it could be potentially used as a natural antioxidant for use in functional food, cosmetic and pharmaceutical industries.
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Yan
authors.affiliation: Department of Biosystems Engineering and Soil Science, University of Tennessee, 2506 E.J. Chapman Drive, Knoxville, TN 37996-4531, USA. Electronic address: ran.ye.email@gmail.com.
authors.forename: Ran
authors.initials: R
authors.lastname: Ye
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address: chenye@tust.edu.cn.
authors.forename: Ye
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D004040:Dietary Carbohydrates / Q000032:analysis; D004043:Dietary Fiber / Q000032:analysis*; D008970:Molecular Weight; D011134:Polysaccharides / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D004040:Dietary Carbohydrates; D004043:Dietary Fiber; D011134:Polysaccharides
keywords: Antioxidant activity; Blasting extrusion processing; Soluble dietary fiber; Soluble polysaccharide; Wheat bran