Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (6): 1440-1451.DOI: 10.3969/j.issn.1004-1524.2023.06.21

• Food Science • Previous Articles     Next Articles

Effects of different drying methods on antioxidant ability and flavor of bayberry pomace powder

ZHANG Saili1,2(), FANG Xiangjun2, WU Weijie2, GAO Yuan2, CHEN Hangjun2, YANG Hailong1,*(), GAO Haiyan2,*()   

  1. 1. School of Life & Environmental Science, Wenzhou University, Wenzhou 325035, Zhejiang, China
    2. Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2022-05-12 Online:2023-06-25 Published:2023-07-04

Abstract:

Bayberry pomace, a by-product of bayberry processing, is rich in various nutrients such as phenolics, sugars, and dietary fiber. To utilize the processing by-product, bayberry pomace was dried by hot air drying, vacuum drying and freeze drying, respectively, and the physical properties, flavor quality, and antioxidant activity were analyzed and compared in this study. Results showed that the sample dried by freeze drying had the lowest bulk density, the higher L* value, and the higher a* value, the highest total phenolic content, total flavonoid content, and anthocyanin content, resulting in stronger reducing power, ABTS free radical scavenging ability, and DPPH free radical scavenging ability. Meanwhile, the sample dried by freeze drying contained higher total sugar content, and lower total acidity. Furthermore, freeze drying maintained more aldehydes, esters and ketones. There is no significant difference in physical properties and antioxidant activity between samples dried by hot air drying and vacuum drying, but the total sugar content in sample dried by hot air drying was lower. Samples dried by vacuum drying contained higher total acidity, especially acetic acid, which worsened the flavor of bayberry pomace powder. Samples dried by freeze drying and hot air drying had a higher fruity and ester aroma. Comprehensively, freeze drying was more suitable for the processing of bayberry pomace powder.

Key words: bayberry, pomace, drying, antioxidant, flavor

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