ORIGINAL RESEARCH article
Front. Nutr.
Sec. Food Chemistry
Volume 12 - 2025 | doi: 10.3389/fnut.2025.1631421
Combining thermocompression, multi enzymolysis, and citric acidgrafting or carboxymethylation on the physicochemical and hypoglycemic properties of ziziphus jujuba pit dietary fibre
Provisionally accepted
- 1Shanxi Normal University, Linfen, China
- 2Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi Province, China
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Red jujube (Ziziphus jujuba Mill.) pits are a rich, available, and inexpensive dietary fibre resource. However, red jujube pits are rarely used in the food industry because of their hardness and high content of cellulose and lignin. Herein, the influences of combining thermocompression, enzymolysis, citric acid-grafting, or carboxymethylation on the physicochemical and hypoglycemic properties of jujube pit dietary fibre (JPDF) were investigated. A lower crystallinity, more porous microstructure, smaller particle size, higher viscosity, expansion volume, and ability to retain water were observed in JPDF after thermocompression and enzymolysis combined with citric acid-grafting or carboxymethylation (P< 0.05). JPDF modified via thermocompression, enzymolysis and carboxymethylation (JPDF-TEC) exhibited the largest surface area (189.21 m²•kg -1 ), highest viscosity (16.31 cP), expansion volume (8.70 mL/g), glucose diffusion-inhibitory activity (46.63%), and α-glycosidase-inhibitory activity (20.35%). Moreover, JPDF modified via thermocompression, enzymolysis and citric acid-grafting (JPDF-TECA) exhibited the highest soluble fibre content (24.00 g/100 g), glucose sorption quantity (34.79 μmol•g -1 ), and α-amylase-inhibitory activity (23.43%). However, thermocompression and enzymolysis coupled with citric acid-grafting or carboxymethylation reduced the lightness of JPDF. Thus, thermocompression and enzymolysis coupled with carboxymethylation was the most effective method to improve the hypoglycemic properties and applications of JPDF.
Keywords: Jujube pit dietary fibre, thermocompression, citric acid-grafting, multi enzymolysis, carboxymethylation, Hydration properties, hypoglycemic properties
Received: 19 May 2025; Accepted: 04 Jul 2025.
Copyright: © 2025 Song, Yang, Feng, Long, Li, Ma, Meng, Niu and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Yan Li, Shanxi Normal University, Linfen, China
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