A Comparative study of three Brassicaceae vegetables cultivated in Canakkale: Determination of the total phenolic content and antioxidant activity of pulp and juice samples of radish (Raphanus Sativus L.), cabbage (Brassica oleracea L. var capitata L) and cauliflower (Brassica oleracea L.) ACCEPTED - Canakkale Onsekiz Mart University Journal of Graduate School of Natural and Applied Sciences