engleski

Antioxidant capacity and physicochemical characteristics of Croatian oak honeydew honey

Oak tree (Quercus frainetto Ten.) is distributed around southeast Europe and Asia Minor, while the western border is in Požega valley, Croatia. Oak honeydew honey has specific way of production. Sweet sap with foam appearance, which is formed at the place where the green acorns were discarded, is gathered by the bees and processed into dark honey. Specific way of production results in specific physiochemical characteristics of this honeydew honey. Objective of this preliminary study was to determine antioxidant capacity, total polyphenol content and physicochemical characteristics of oak honeydew honey. Melissopalynological analysis was performed and following physicochemical characteristics were determined: moisture, electrical conductivity, HMF content, diastase activity, specific rotation and sugar profile. Colour was determined by Lovibond Honey ColorPod. Antioxidant capacity was determined by FRAP (Ferric Reducing Antioxidant Power) and DPPH (2, 2-diphenyl-1-picrylhydrazyl) methods, and total polyphenol content by modified Folin-Ciocalteu method. The results showed high antioxidant capacity and total polyphenol content as well as atypical negative values of specific rotation.

antioxidant capacity; physicochemical characteristics; oak honeydew honey

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