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• Composition Analysis •     Next Articles

Variation of Active Components of Red Raspberry Juice During Acid-reducing Culture

2,Dan DONG Hong-Ying HE   

  • Received:2020-03-05 Revised:2021-01-25 Online:2021-05-25 Published:2021-05-26

Abstract: In order to study the effect of Issatchenkia terricola WJL-G4 on the active components in red raspberry juice during the acid-reducing culture, the inoculated red raspberry juice was taken as the treatment group and the uninoculated red raspberry juice under the same culture conditions as the control group, and the content of total phenolics, total flavonoids and anthocyanins were analyzed. Active components analyzed by high performance liquid chromatography (HPLC). The correlation analysis and principal component analysis were used to discuss the correlation between fermentation process and components. The results showed that the content of total phenolics and anthocyanins in treatment group and control group were decreased, the total flavonoids content significantly increased in treatment group after 5 days of acid-reducing culture. After 8 days of culture, ten kinds of phenolic acids, seven kinds of flavonoids and one kind of aromatic compound were?identified in juice. The content of the cryptochlorogenic acid, p-coumaric acid, raspberry ketone, rutin and quercetin were significantly increased. The content of arbutin, gallic acid, neochlorogenic acid and caffeic acid were higher than the control group among nine kinds of significantly decreased component. Results of principal component analysis showed that the cumulative percentage contribution of 3 principal component factors reach 93.098%, which can well describe the information of the original active components index. The 1 to 4 days of acid-reducing culture were located on the positive interval of the plot for PC1 which had the higher synthetic score of active components. Choosing 1 to 4 days as the optimal time for acid-reducing culture. The experiment provided theoretical support for the research of deacidification properties and comprehensive utilization of Issatchenkia terricola WJL-G4.

Key words: bio-deacidification, red raspberry, active components, principal component analysis

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