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Updated: Apr 8, 2026

An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
Published on: July 31, 2019
Structural and physicochemical properties and changes in vitro digestion and fermentation of soluble dietary fiber
Ting Xia1, Yaning Nie1, Yang Chen1
1State Key Laboratory of Food Nutrition and Safety/Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
Abstract:
The aim of this study was to investigate the structure, physicochemical properties, and changes in vitro digestion and fermentation between unfermented tea residue dietary fiber (UDF) and fermented tea residue soluble dietary fiber (FSDF). The results showed that soluble dietary fiber in FSDF was increased from 2.54 % to 15.65 % after fermentation modification. Monosaccharide composition analysis showed that xylose and glucose accounted for a higher proportion in FSDF. FSDF had smaller particle size, lower crystallinity and higher thermal stability. The water holding capacity, oil holding capacity and water swelling capacity of FSDF were significantly increased. Rheological properties showed that FSDF exhibited higher viscosity and better elastic than UDF. Furthermore, FSDF generated more short-chain fatty acids, and the structure was looser than UDF, which was easier to be utilized by intestinal flora. These findings provided higher value of dietary fiber in tea residue by fermentation modification as functional products.
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