Some physico-chemical properties, fatty acid compositions, macro-micro minerals and sterol contents of two variety tigernut tubers and oils harvested from East Mediterranean region

Abstract This research on Yellow sugar and Honey tuber varieties tigernut tubers’ oils physico-chemical properties were investigated to collected from Adana province in Turkey. The 1000 seed weight, width, length, moisture, ash and ascorbic acid values of yellow sugar and honey wax tubers were established as 343,496 and 327,524 g, 7.61 and 8.76 mm, 17.07 and 15.23 mm, 6.41 and 6.45%, 1.19 and 1.38% and 67.34 and 58.81 mg/kg, respectively. Free fatty acidity, peroxide values, refractive index, density, iodine number, total sterol, saponifiable matter, unsaponifiable matter, mineral values of yellow sugar and honey tuber tigernut oils were determined. The palmitic, stearic, oleic and linoleic acid contents of yellow sugar and honey tuber oils were determined as 13.02 and 12.76, 3.92 and 3.94, 69.34 and 69.91, and 11.93 and 11.80%, respectively. Campesterol, sitigmasterol and β-sitosterol contents of yellow sugar and honey tuber tigernut oils were determined. According to results, chufa tubers have high oil, oleic acid, sterol and some minerals suggest that these tubers may be very useful effect on human health and tuber oils can be use in the vegatable oil industry.

摘要 本研究针对土耳其阿达纳省采集的黄糖型与蜂蜜型油莎豆（tigernut）块根油脂的理化性质展开了探究。本研究测定了两类油莎豆块根的相关参数：黄糖型与蜂蜜型油莎豆块根的千粒重、块根宽度、长度、水分含量、灰分含量及抗坏血酸含量分别为343.496 g与327.524 g、7.61 mm与8.76 mm、17.07 mm与15.23 mm、6.41%与6.45%、1.19%与1.38%，以及67.34 mg/kg与58.81 mg/kg。本研究还测定了黄糖型与蜂蜜型油莎豆块根油脂的游离脂肪酸酸度、过氧化值、折射率、密度、碘值、总甾醇含量、可皂化物含量、不皂化物含量及矿物元素含量。黄糖型与蜂蜜型油莎豆块根油脂的棕榈酸、硬脂酸、油酸及亚油酸含量分别为13.02%与12.76%、3.92%与3.94%、69.34%与69.91%，以及11.93%与11.80%。此外，本研究还测定了两类油莎豆块根油脂中的菜油甾醇、豆甾醇及β-谷甾醇含量。研究结果表明，油莎豆块根富含油脂、油酸、甾醇及部分矿物元素，提示该类块根对人体健康具有积极作用，其块根油脂可应用于植物油脂加工产业。