Stability and anthocyanin bioavailability of red bayberry juice protein powder

  • MENG Ziyi ,
  • LUO Ziyang ,
  • DUAN Hanying ,
  • WANG Chao
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  • (Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China)

Received date: 2021-09-18

  Revised date: 2022-01-14

  Online published: 2023-03-03

Abstract

Bayberry has a short shelf life and rich anthocyanin. Pea protein is rich in nutrition and does not contain allergens. Pea protein was used as wall material, and the bayberry juice was embedded into the solid beverage of bayberry protein powder by high-pressure homogenization and spray drying. The encapsulation properties and stability of bayberry protein powder were characterized by scanning electron microscope, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), particle size determination, and Zeta potential analysis. The anthocyanin bioaccessibility of bayberry protein powder was investigated by in vitro simulated digestion. Results showed that the morphology of bayberry protein powder was round and smooth with a smaller powder size. FTIR analysis showed that the preparation process of bayberry protein powder had a certain effect on the secondary structure of pea protein (α-helix decreased by 1.22%, β-sheet decreased by 1.98%, β-turn increased by 3.72%, and random coil decreased by 0.52%). TG analysis showed that bayberry protein powder retained the thermal stability of pea protein. The Zeta potential of bayberry protein powder beverage was -45 mV, which was significantly higher than that of pea protein (-18 mV). The in vitro simulated digestion results showed that the anthocyanin bioavailability of bayberry pulp, bayberry juice, and bayberry protein powder after digestion in gastric juice for 30 min was 91.23%, 99.31%, and 74.98%, respectively. After 120 min, the anthocyanin bioavailability of bayberry protein powder was basically the same as that of pulp and fruit juice (65%-75%). This study provides a theoretical basis for the development of high-value-added bayberry products and new solid drinks.

Cite this article

MENG Ziyi , LUO Ziyang , DUAN Hanying , WANG Chao . Stability and anthocyanin bioavailability of red bayberry juice protein powder[J]. Food and Fermentation Industries, 2023 , 49(3) : 197 -204 . DOI: 10.13995/j.cnki.11-1802/ts.029444

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