Corinthian raisins (Vitis vinifera L., var. Apyrena) antioxidant and sugar content as affected by the drying process: a 3‐year study

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. su...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2019-01, Vol.99 (2), p.915-922
Main Authors: Panagopoulou, Eirini A, Chiou, Antonia, Nikolidaki, Eirini K, Christea, Margarita, Karathanos, Vaios T
Format: Article
Language:English
Subjects:
anthocyanins
Antioxidants
Antioxidants - chemistry
Climatic conditions
Corinthian raisins
Crop production
Crops
Desiccation - methods
Drying
Food Handling - methods
Fruit - chemistry
Fruits
Glucosides
Greece
Organic chemistry
Phenolic compounds
phenolics
Phenols
Phenols - chemistry
Phytochemicals
Polyphenols - chemistry
Raisins
Shade
Sugar
Sugars - chemistry
Sun
Vitis - chemistry
Vitis vinifera
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Summary: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
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.9263