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. 2023 Oct;103(13):6190-6197.
doi: 10.1002/jsfa.12685. Epub 2023 May 23.

An efficient method for improving the stability of Monascus pigments using ionic gelation

Mengru Wei  1   2 , Jingjing Zhu  2 , Hongshuai Gao  2   3 , Huanhuan Yao  2 , Cuiping Zhai  1 , Yi Nie  2   3
Affiliations

An efficient method for improving the stability of Monascus pigments using ionic gelation

Mengru Wei et al. J Sci Food Agric. 2023 Oct.

Abstract

Background: Monascus pigments (Mps) are easily impacted by heating, pH and light, resulting in degradation. In this study, Mps were encapsulated by the ionic gelation method with sodium alginate (SA) and sodium caseinate (SC), as well as CaCl2 as a crosslinker. The encapsulated Mps SA/SC in four proportions (SA/SC: 1/4, 2/3, 3/2, 4/1, w/w). Then, the encapsulation efficiency and particle size of the SA/SC-Mps system were evaluated to obtain the optimal embedding conditions. Finally, the effects of heating, pH, light and storage on the stability of non-capsulated Mps and encapsulated Mps were assessed.

Results: SA/SC = 2/3 (AC2) had higher encapsulation efficiency (74.30%) of Mps and relatively small particle size (2.02 mm). The AC2 gel beads were chosen for further investigating the stability of encapsulated Mps to heating, pH, light and storage. Heat stability experiments showed that the degradation of Mps followed first-order kinetics, and the encapsulated Mps had lower degradation rates than non-capsulated Mps. Encapsulation could reduce the effect of pH on Mps. The effects of ultraviolet light on the stability of Mps were considered, and showed that the retention efficiency of encapsulated Mps was 22.01% higher than that of non-capsulated Mps on the seventh day. Finally, storage stability was also evaluated under dark refrigerated conditions for 30 days, and the results indicated that encapsulation could reduce the degradation of Mps.

Conclusion: This study has proved that AC2 gel beads can improve the stability of Mps. Thus, the ionic gelation method is a promising encapsulation method to improve the stability of Mps. © 2023 Society of Chemical Industry.

Keywords: Monascus pigments; encapsulation; ionic gelation method; stability.

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References

REFERENCES

    1. Liu L, Zhao J, Huang Y, Xin Q and Wang Z, Diversifying of chemical structure of native monascus pigments. Front Microbiol 9:3143 (2018).
    1. Feng Y, Shao Y and Chen F, Monascus Pigments. Appl Microbiol Biotechnol 96:1421-1440 (2012).
    1. Wu S, Bao Y, Wang D, Wang X, Liu H, Li Z et al., Water-soluble complexes of orange pigments from monascus sp. with HP-β-CD: preparation, inclusion mechanism, and improved stability. J Mol Liq 300:112212 (2020).
    1. Zeng H, Jie Q, Xin Z, Dayong X, Minghua X, Feng L et al., Optimization of submerged and solid state culture conditions for Monascus pigment production and characterization of its composition and antioxidant activity. Pigm Resin Technol 48:108-118 (2019).
    1. Agboyibor C, Kong W-B, Chen D, Zhang A-M and Niu S-Q, Monascus pigments production, composition, bioactivity and its application: a review. Biocatal Agric Biotechnol 16:433-447 (2018).

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