Bazı Atık Tohum Yağlarının Kimyasal Karakterizasyonunun, Antioksidan Aktivite ve Oksidatif Stabilitelerinin Değerlendirilmesi

Bu çalışmada, kiraz, vişne, dut ve erik çekirdek yağlarının yağ asidi komposizyonu, antioksidan aktivitesi, toplam fenolik madde ve oksidatif stabilitesi araştırılmıştır. Oleik asit (%42,9-67,3), kiraz, vişne, ve erik çekirdek yağların da en fazla bulunan yağ asidi olarak belirlenmiş olup ve onu linoleik asit izlemiştir (%23,4-41,8). Linoleik asit (%77,6) ise dut çekirdek yağında en fazla bulunan yağ asidi olarak belirlenmişitir. Kiraz, vişne ve erik çekirdek yağlarında, ?-tokoferol, başlıca tokoferol izomeri olarak belirlenmiş olup, değeri 579,9'dan 605 mg/kg yağ'a kadar değişmekte iken, dut çekirdek yağında ?- tokoferol, 1354mg/kg yağ değeri ile başlıca tokoferol izomeri olarak tespit edilmiştir. Erik çekirdeği yağı, 2,2-diphenyl-1-picrylhydrazyl (DPPH) ve 2,2'-azino-bis-(3- ethylbenzthiazoline-6-sulfonic acid) (ABTS) testlerinin her ikisinde de en yüksek antioksidan aktivite değerine sahiptir. kiraz, vişne, dut ve erik çekirdek yağları lipid hidroperoksit ve TBARS (2-tiobarbuturik asit-reaktif substant) oluşumları arasında önemli bir fark yoktur. Ayrıca, erik çekirdeği yağı en yüksek indüksiyon periyodu değerine (15,1 saat) sahip olup onu, dut (4,1 saat) kiraz (1,5 saat) ve vişne (1,3 saat) çekirdek yağları izlemektedir. Bu araştırma sonuçları bu atık çekirdek yağlarının yüksek antioksidan kapasite ve tokoferol içeriğine sahip olduğunu ve böylelikle bu yağlardan gıda endüstrisinde faydalanabiliceğini göstermiştir.

Evaluation of Chemical Characterization, Antioxidant Activity and Oxidative Stability of Some Waste Seed Oil

In this study, fatty acid composition, antioxidant activity, total phenolic compounds (TPC) and oxidative stability of cherry seed (SCO), sweet cherry seed (SCSO), mulberry seed (MSO) and plum seed oil (PSO) were determined. Oleic acid was determined as primary fatty acid (42.9-67.3%), and followed by linoleic acid (23.4-41.8%) for SCO, SCSO and PSO. Linoleic acid was determined as primary fatty acid in MSO. γ- tocopherol was determined the main and highest tocopherol isomers varied from 579.9 to 605 mg/kg oil in SCO, SCSO and PSO, whereas δ-tocopherol was determined main tocopherol isomer with 1354mg/kg oil value in MSO. Plum seed oil (PSO) was the highest antioxidant activity values in both 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) assays. There was no significant differences in lipid hydroperoxide and TBARS (2-thiobarbituric acid-reactive substance) formation among SCO, SCSO and MSO. PSO had the highest induction period (15.1 h), followed by MSO (1.4 h), SCSO (1.5 h), SCO(1.3 h). PSO was oxidatively more stable than the other oil samples. This research shows that these waste seed oils have high antioxidant capacity and tocopherol content, so they could be used in food industry.

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