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Effect of Pretreatment and Drying on the Nutritional and Functional Quality of Raisins Produced with Seedless Purple Grapes

文献类型： 外文期刊

作者： Liu, Fengjuan 1 ; Lei, Jing 2 ; Shao, Xupeng 1 ; Fan, Yingying 1 ; Huang, Wei 2 ; Lian, Weijia 2 ; Sun, Tao 1 ; Chen, Ya 2 ; Wang, Cheng 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Key Lab Funct Nutr & Hlth Characterist Agr Prod De, Inst Qual Stand & Testing Technol Agriprod, Lab Qual & Safety Risk Assessment Agriprod Urumqi,, Urumqi 830091, Peoples R China

2.Xinjiang Acad Agr Sci, Microbial Applicat Inst, Urumqi 830091, Peoples R China

关键词： seedless purple raisins; pretreatment; nutritional quality; phenolic content; antioxidant activity

期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）

ISSN：

年卷期： 2024 年 13 卷 8 期

页码：

收录情况： SCI

摘要： Raisins, known for their delicious taste and high nutritional value, are among the most widely consumed dried fruits globally. The natural waxy layer on the surface of grapes impedes water migration, making pretreatment necessary before drying. This study evaluated the effects of various pretreatment methods on the nutritional and functional quality of seedless purple raisins. By using non-pretreated dry seedless purple raisins as a control, the impact of physical and chemical pretreatment methods on the nutritional and functional qualities of seedless purple raisins was assessed through the analysis of nutrient content, phenolic compounds, and antioxidant activity. Our results demonstrate that physical pretreatment significantly increases the levels of vitamin C, fructose, glucose, total acid, total phenolics, total flavonoids, total anthocyanins, and antioxidant activity compared to chemical pretreatment and the control group. The correlation analysis revealed that phenolic substances were closely linked to antioxidant capacity. Additionally, phenolic compounds, including resveratrol, ferulic acid, chlorogenic acid, ethyl coumarate, and cinnamic acid, were more abundant following physical pretreatment. The OPLS-DA model effectively differentiated the three groups of processed samples, showing that different pretreatments significantly affect the nutritional and functional quality of seedless purple raisins. These findings suggest that physical pretreatment offers considerable potential for improving the drying quality of seedless purple raisins.

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