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- MakaleAçık Erişim2024Evaluation of Antioxidant Properties of Wild and Cultivated Blueberry Leaves and Their Phenolic Compound
Okan, Onur Tolga; Ulusoy, Esra; Öz, Mehmet; Deniz, Ilhan
Aim of study: This study aimed to investigate the antioxidant activity and polyphenol and flavonoid content of blueberry leaves, which could have positive effects on human health. Area of study: The research was conducted in three cities of Turkiye's Karadeniz region, where blueberry cultivation is prevalent: Giresun, Trabzon, and Rize. Material and method: In this study, 29 blueberry leaves (27 cultivated and two wild) were selected as sample materials. The total phenolic content (Folin-Ciocalteu method), total flavonoid content (aluminum (III) chloride method), and total antioxidant capacity (DPPH and FRAP) of the samples were analyzed. Phenolic characterization was performed using HPLC. Main results: The total phenolic content varied between 8.36 and 121.61 mg GAE/g, whereas the total flavonoid content ranged from 0.91 to 3.07 mg QE/g. The results revealed that blueberry leaves had high antioxidant activity and contained considerable amounts of polyphenols and flavonoids. Chlorogenic acid was identified as the dominant compound in all leaves samples. Research highlights: These findings indicate that blueberry leaves could be a valuable source of antioxidants in the food and cosmetic industries, comparable to the fruit itself.
- MakaleYalnız künye2013Antioxidant Analysis Methods and Some Non-Wood Forest Plant Products as Sources of Antioxidants in Eastern Black Sea Region
Okan, Onur Tolga; Varlibas, Hulya; Öz, Mehmet; Deniz, Ilhan
Eastern Black Sea region has wide genetically plant diversity due to physical and different climatic characteristic. These plants, which are potential source of antioxidants, prevent the oxidative stres caused by oxygen and photons at the same time. Interest of antioxidant compound has been increased for last years. The reason of this, it is believed that an increased intake of food, which is rich in natural antioxidant, is associated with a lower risk of degenerative diseases. In this study, 10 plants, which are sources of antioxidant and marketable in Eastern Black Sea region, were chosen. Antioxidant activity and potentials use area of these plants were examined. Moreover, antioxidant compounds and determination of antioxidant activity methods were discussed.