Erzincan'da yetiştirilen üzüm çeşitlerinin antioksidan aktiviteleri antosiyanin profilleri ve bazı fiziksel ve kimyasal özellikleri

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Thesis Type: Postgraduate

Institution Of The Thesis: Ataturk University, Fen Bilimleri Enstitüsü, Gıda Mühendisliği Anabilim Dalı, Turkey

Approval Date: 2012

Thesis Language: Turkish

Student: PINAR KAPLAMA

Supervisor: Memnune Şengül

Open Archive Collection: AVESIS Open Access Collection

Abstract:

In this research, the some physical and chemical properties, anthocyanin content, total phenolic content, antioxidant capacity of Hacıtesbihi, Karaerik, Kamik, Sarıgolot and Kabuğuyufka grapes were investigated. Also, anthocyanin content, total phenolic content, antioxidant capacity of these grape skin, pulp and seed were measured. Total dry matter, ash, pH, titratable acidity, reducing sugar, sucrose, total sugar, color (L, a, b, C, h), total phenolic content, antioxidant capacity [ß-caroten bleaching method, DPPH free radical-scavenging activity (IC50)] of grape were determined as 16,33-20,48%; 0,25-0,50%; 3,34-3,93; 0,41-0,62%; 11,72-15,7 g/100g; 0,11-0,48 g/100g; 11,96-16,13g/100g; 27,69-41,51; (-7,4)-(2,25); (-3,21)-(15,56); 2,73-17,23; 111,80-319,97; 249,96-584,78 ?g GAE/mg sample; 13,16-67,9%; 40,56-140,22 µg/ml, respectively. Variety were found effective significantly (p<0,01) on total dry matter, ash, pH, titratable acidity, reducing sugar, total sugar, L, a, b, C, h values, total anthocyanin content and anthocyanin compounds, total phenolic content and antioxidant capacity. But variety were not found effective significantly on sucrose amount.Anthocyanin ratio was significantly determined different among the grape varieties. It was determined that the highest level of total anthocyanin was found in Karaerik grape variety and followed by the amounts in Hacıtesbihi and Kamik varieties. Cyanidin-3-O-glucoside chloride was the major and pelargonidin-3,5-di-O-glucoside was the minor anthocyanins in all varieties. With regard to anthocyanin composition Hacıtesbihi and Karaerik grapes are higher amount of cyanidin- 3-O-glucoside was followed by the amounts of cyanidin-3,5-di-O-glucoside, pelargonidin-3-O-glucoside, malvidin-3,5-diglucoside, delphinidin chloride, pelargonidin-3,5-di-O-glucoside. The amount of phenolic compounds was significantly determined varied by grape variety and grape tissue. The highest concentration of total phenolic compounds was found in grind seed of Hacıtesbihi and was followed by Sarıgolot and Karaerik varieties.The results of this study showed that grape fruits and seeds can serve as a natural antioxidant because of their high total phenolic and anthocyanin contents and antioxidant activities.