Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XXIX, Issue 2
Written by Mihaela MULȚESCU, Iulia-Elena SUSMAN
This study investigates the use of the photochemiluminescence (PCL) assay in two different systems - hydrophilic (ACW) and lipophilic (ACL) - along with the DPPH method to evaluate the antioxidant potential of three fruits from the Cucurbitaceae family: watermelon, yellow watermelon, and melon. The results showed that the analyzed fruits contain phenolic compounds ranging from 7.40 to 15.43 mg of Gallic Acid Equivalent (GAE) per 100 g of fresh weight (FW). Regarding flavonoid content, concentrations were approximately 1 mg Rutin Equivalent (RE) per 100 g FW, while anthocyanin content was below 1 mg cyanidin-3-glucoside equivalent (CGE) per 100 g FW. Notably, melon exhibited the highest antioxidant capacity among the fruits in both ACW and ACL systems, followed by watermelon. A strong positive correlation was found between antioxidant capacity assessed with the ACL method and the DPPH assay, with a correlation coefficient (r) of 0.9932. Furthermore, a significant correlation was also observed between the ACW system and the DPPH assay, with a correlation coefficient of 0.9752.
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