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Song, Jiao; Li, Jiaxin; Zhong, Jingping; Guo, Zhiping; Xu, Jia; Chen, Xinglv; Qiu, Min; Lin, Junzhi; Han, Li; Zhang, Dingkun
International journal of biological macromolecules, 06/2024, Volume: 271, Issue: Pt 2Journal Article
κ-Carrageenan (κ-Car) is an important material for preparing food gels and hydrogels. However, κ-Car gel has issues with high hardness and low water-holding capacity. Modification strategy of micronization is proposed for the first time to explore its influence on texture properties and gelling process of κ-Car gel, and to investigate the feasibility of κ-Car as a food matrix with low strength. κ-Car undergoing 60 min of micronization, the d(0.9) decreased by 79.33 %, SBET and Vtotal increased by 89.23 % and 95.27 %. The swelling rate and degree of gelling process increased significantly, and the microstructure changed from loose large pores to dense small pores resembling a “honeycomb”. Importantly, the hardness of gel-60, Milk-60 and PNS-60 decreased by 72.52 %, 49.25 % and 81.37 %. In addition, WHC of gel-60, Milk-60 and PNS-60 was improved. IDDSI tests showed that κ-Car gels, milk gels and PNS gels can be categorized as level 6 (soft and bite-sized), except for PNS-60, which belongs to level 5 (crumbly and moist). Furthermore, the texture and bitter masking effect of milk gels and PNS gels were improved. In conclusion, this study demonstrated that micronization can be a novel approach to improve the gel properties of κ-Car, laying the groundwork for developing dysphagia foods. Display omitted •Micronization is a new way to change the textural properties of κ-carrageenan gel.•The problem of high hardness of κ-carrageenan gel was solved by micronization.•The bitter masking effect of κ-carrageenan gel is improved after micronization.•Micronized κ-carrageenan gel can be as a dysphagia food with good texture and taste.
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