EJPAU 2006. Orak H. TOTAL ANTIOXIDANT ACTIVITIES, PHENOLICS, ANTHOCYANINS, POLYPHENOLOXIDASE ACTIVITIES AND ITS CORRELATION OF SOME IMPORTANT RED WINE GRAPE VARIETIES WHICH ARE GROWN IN TURKEY

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 1

Topic:

Food Science and Technology

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Orak H. 2006. TOTAL ANTIOXIDANT ACTIVITIES, PHENOLICS, ANTHOCYANINS, POLYPHENOLOXIDASE ACTIVITIES AND ITS CORRELATION OF SOME IMPORTANT RED WINE GRAPE VARIETIES WHICH ARE GROWN IN TURKEY, EJPAU 9(1), #18.
Available Online: http://www.ejpau.media.pl/volume9/issue1/abs-18.html

TOTAL ANTIOXIDANT ACTIVITIES, PHENOLICS, ANTHOCYANINS, POLYPHENOLOXIDASE ACTIVITIES AND ITS CORRELATION OF SOME IMPORTANT RED WINE GRAPE VARIETIES WHICH ARE GROWN IN TURKEY

H. Hülya Orak
Thrace University, Tekirdağ Agricultural Faculty, Food Technology Department of Vocational College Tekirdağ, Turkey

ABSTRACT

Eight important red wine grape varieties (Alicante, Kuntra Karasakiz, İrikara, Gabarnet Franch, Cinsaut, Gamay, Merlot and Syrah) which are use for production for red wine by Doluca winery were analyzed. The highest AA (percentage of inhibition on peroxidation in linoleic acid system) was obtained in Gabarnet Franch and Merlot extracts as 90.25% and 90.15% respectively. The lowest AA was determined in İrikara (83.20%) which had the lowest phenol content. Total phenol content (TP) was varied between 1376 (İrikara) and 2329 µg × ml^-1 GAE equivalent in methanol extracts (Merlot). Total anthocyanin content (TA) was ranged from 253.5 mg × kg^-1 (İrikara) to 2488.4 mg × kg^-1 (Alicante). The lowest PPO activity was found in Merlot (0.070 U × ml^-1 × min) and the highest activity in Gamay (1.155 U × ml^-1 × min). Total sugar content in the analyzed varieties was changed from 15.30% (Syrah) to 22.64 (Merlot). The examinations showed that AA and TP significant correlation (r² = 0.854**) but less significantly related with TA (r² = 0.263).

Key words: total antioxidant activity, total phenolic, total anthocyanin, polyphenoloxidase activity, red wine grape varieties.

H. Hülya Orak
Thrace University, Tekirdağ Agricultural Faculty,
Food Technology Department of Vocational College Tekirdağ, Turkey
Phone: +0900282 283 14 38
Fax.,+090 0282 293 14 60
email: horak@trakya.edu.tr

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