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  • Title: Corinthian raisins (Vitis vinifera L., var. Apyrena) antioxidant and sugar content as affected by the drying process: a 3-year study.
    Author: Panagopoulou EA, Chiou A, Nikolidaki EK, Christea M, Karathanos VT.
    Journal: J Sci Food Agric; 2019 Jan 30; 99(2):915-922. PubMed ID: 30009464.
    Abstract:
    BACKGROUND: Corinthian raisins or Corinthian currants are dried grape products that account for approximately 3% of dried vine fruit production worldwide. Greece is the major Corinthian raisin producer. In this study Corinthian raisins were produced by applying two traditional drying methods, i.e. sun and shade drying. The drying process effect on the raisin phytochemical and sugar content was assessed; samples obtained over three consecutive crops were evaluated to prevail over climatic condition variations. RESULTS: Total phenolic, flavanol, and anthocyanin content were higher in Corinthian raisins dried under shade as compared with the sun-dried ones; individual anthocyanidin-3-O-glucosides were also qualitatively and quantitatively higher under shade drying in most cases. Differences were observed in Corinthian raisin phytochemical content among the crop years evaluated. The drying process applied did not discriminatively affect the sugar content of Corinthian raisin. CONCLUSION: Drying under shade was proven superior to sun drying with respect to Corinthian raisin phytochemicals and could be considered as an appealing drying method for the production of dried raisins and perhaps other dried fruits. © 2018 Society of Chemical Industry.
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