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Articles by Feryal Karadeniz
Total Records ( 2 ) for Feryal Karadeniz
  Hande Selen Erge and Feryal Karadeniz
  The bioactive compounds of 16 tomato cultivars, grown in the same field for 2 years (2003 and 2004) were investigated. Lycopene (5.7–26.3 mg kg-1) was the predominant carotenoid, while β-carotene (2.1–11.2 mg kg-1) and a small amount of lutein (0.02–0.49 mg kg-1) were found in all tomato cultivars. Kagome 77, the richest source of total carotenoids and L-ascorbic acid, also showed the highest antioxidant activity. ß-Carotene and lutein contents of tomatoes differed between 2 years statistically. Antioxidant activities of tomatoes were found between 48 and 118 μmol TEAC 100 g-1. A significant correlation was only observed between L-ascorbic acid (2.2–13.8 mg 100 g-1) and antioxidant activity using TEAC assay.
  Nuray Koca Bozalan and Feryal Karadeniz
  Carotenoid profile, antioxidant activity, and total phenolic content of carrot cultivars from three different locations in Turkey were determined during two consecutive years. The major carotenoids determined in carrots were ß-carotene (41.60–71.2 mg/kg FW) and a-carotene (13.44–30.11 mg/kg FW). The total phenolic contents of carrots ranged from 114–306 mg catechin/kg FW. The antioxidant activity in carrots determined by the TEAC assay varied between 25.9 and 86.6 µmol TE/100 g FW. There was considerable variation in carotenoid contents between locations and years among cultivars. Significant differences were found between the two consecutive years in total phenolic contents except for only one cultivar. The level of antioxidant activity in carrots varied significantly over the years.
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