DETERMINATION OF FATTY ACID, STEROL, TOCOL COMPOSITIONS, TOTAL PHENOLIC CONTENTS AND ANTIOXIDANT ACTIVITIES OF TURPENTINE (PISTACIA TEREBINTHUS L.) AND PISTACHIO (PISTACIA VERA) OILS GROWN IN TURKEY

Year 2018, , 384 - 392, 24.03.2018

Ebru Pelvan , İlknur Demirtas

https://doi.org/10.15237/gida.gd18017

Abstract

Oils of turpentines and
pistachios from Antep, Siirt and Mardin regions were evaluated for their fatty
acid, tocol, and sterol compositions as well as total phenolic contents and
oxygen radical absorbance capacities (ORAC). The oil content of the samples
varied between 50.33 and 54.00 g/100 g nuts. Eight fatty acids were identified,
among which 18:1ω9 predominated (55.78 - 75.10 %) in all samples, followed by
18:2ω6c, 16:0, and 18:0. Among nine phytosterols and seven tocol isoforms,
β-sitosterol (148.40-205.90 mg/100 g) and γ-tocopherol (33.57-43.94 mg/100 g) were predominant in samples. Total
phenolic contents ranged from 3.03 to 4.52 mg of gallic acid equivalents
(GAE)/100 g oil. With regard to antioxidant activity, ORAC values were in the
range of 371.23-736.48 µmol of Trolox equivalents (TE)/100 g oil. According to the
results of the study, these oils extracted from different species, serve as a
good source of nutrients, fat-soluble bioactives, and health-promoting
components.

Keywords

Pistachio, turpentine, fatty acids, tocols, sterols, total phenols, antioxidant activity

TÜRKİYE’DE YETİŞEN BITTIM (PISTACIA TEREBINTHUS L.) VE FISTIK (PISTACIA VERA) YAĞLARININ YAĞ ASİDİ, STEROL, TOKOL KOMPOZİSYONLARI, TOPLAM FENOLİK MADDE MİKTARLARI VE ANTİOKSİDAN AKTİVİTELERİNİN BELİRLENMESİ

Abstract

Antep, Siirt ve Mardin yörelerinde
yetişen bıttım ve fıstık örnekleri toplam yağ içeriği, yağ asidi, sterol, tokol
kompozisyonları, toplam fenolik madde miktarları ve antioksidan aktiviteleri
(oksijen radikali absorbans kapasitesi-ORAC) yönünden incelenmiştir. Örneklerin
yağ miktarlarının 50.33 ile 54.00 g/100 g arasında değiştiği tespit edilmiştir.
Tanımlanan sekiz yağ asidi arasında sırasıyla, en fazla 18:1ω9 (%55.78-75.10),
18:2ω6c, 16:0 ve 18:0 bulunmuştur. Dokuz sterol ve yedi tokol izoformu (4 tokoferol
ve 3 tokotrienol) arasında ise β-sitosterol (148.40-205.90 mg/100 g) ve
γ-tokoferolün (33.57-43.94 mg/100 g) ilk sırada yer aldığı saptanmıştır.
Örneklerin, toplam fenolik madde içeriğinin ise 3.03 - 4.52 mg gallik asit
eşdeğer (GAE)/100 g yağ aralığında değiştiği tespit edilmiştir. Örnekler
antioksidan aktivite açısından değerlendirildiğinde, ORAC değerlerinin
371.23-736.48 µmol Trolox eşdeğer (TE)/100 g yağ aralığında değiştiği
gözlenmiştir. Çalışma sonuçlarına göre; farklı fıstık türlerinden elde edilen
yağların, yağda çözünür biyoaktif bileşikler açısından zengin birer kaynak
olduğu belirlenmiştir. 

Keywords

Fıstık, bıttım, yağ asitleri, tokoller, steroller, toplam fenol

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