Journal
FOOD HYDROCOLLOIDS
Volume 87, Issue -, Pages 260-269Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2018.08.019
Keywords
Peach gum; Polysaccharide; Hydrogels; Probiotics; Encapsulation
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Funding
- Science and Technology Department of Zhejiang Province [2015C32089]
- Zhejiang Gongshang University [Xgy18045, 2017SIAR222, JYTSP20141071, YJG2018408]
- Zhejiang Province
- Department of Education of Zhejiang Province [2016zjgsh009]
- National Natural Science Foundation of China [31371765, 31101272]
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In this work, a pH-responsive semi-interpenetrating network (semi-IPN) hydrogel consisted of peach gum polysaccharide (PGP) and Auricularia polytricha beta-glucans (APP) was developed. Scanning electron microscope and confocal laser scanning microscope showed that PGP-APP hydrogel had a high porous structure with the formation of PGP-APP semi-IPN. Mossbauer and FT-IR spectroscopy revealed that the hydrogels had COO--Fe3+ cross-links through bridging and unidentate binding. Moreover, the delivery capability of the hydrogel was studied. The in vitro release of encapsulated Lactobacillus plantarum CICC20264 and Lactobacillus salivarius CICC23174 in simulated gastric fluid was negligible (below 2 log(10) cfu/g), while viable cells were progressively increased with the degradation of hydrogels at stimulated intestinal conditions and a complete release was reached up to more than 7 log(10) cfu/g after 10.25 h incubation. On account of stable and dense structure, PGP-APP semi-IPN hydrogels had a significant positive effect (p < 0.05) on the viability of bacteria under gastrointestinal transition model. These studies indicated the unique properties of PGP based hydrogels and potential application as intestinal targeted delivery systems.
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