Abstract
Total phenolic contents of immature and mature vine leaves changed between 38.45 (Cabernet Sauvignon) and 78.66 mg GAE/g (Michele Palieri) to 19.49 (Cabernet sauvignon) and 47.76 mg GAE/g (Michele Palieri), respectively. In addition, antioxidant values (DPPH) of immature and mature vine leaves changed between 17.24 mu molTE/g (Chairette) and 30.24 mu mol TE/g dw (Trakya Ilkeren) to 14.54 mu mol TE/gdw (Gamay) and 23.65 mu molTE/g dw (Narince), respectively. Immature and mature vine leaves contained 11.20 g/kg (Michele Palieri) and 34.90 g/kg (Gamay); 24.18 g/kg (Hamburg Misketi) and 60.76 g/kg (Gamay) fructose, respectively. The highest 3,4-dihydroxybenzoic acid and (+)-catechin contents of immature and mature leaves were found in Trakya Ilkeren and Michele Parieri (14.15 mg/kg and 387.86 mg/kg) and Cincaut and Hamburg misketi (11.30 mg/kg and 168.73 mg/kg) vine leaves, respectively. The major fatty acids of vine leave oils were palmitic, linoleic, arachidic, and linolenic acids. Therefore, the results obtained will create a detailed database of these materials. Practical applications Stuffed grape leaf picked fresh from the vine has been a famous dish of Turkish, Balkan, and Middle East Nations cuisine for centuries. Vine leaves are rich in sugars, organic acids, and phenolic compounds. The vine leaves are composed of a wide range of phenolic compounds. The Mediterranean coast has benefited from by-products of grape. The grape leave oils are rich in palmitic, oleic, and linoleic acid. Brined vine leaves have a significant place in human nutrition.