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The Chemical Composition and the Content of Volatile Oil: Potential Factors That Can Contribute to the Oxidative Stability of Nigella Sativa L. Crude Oil
Posted by Admin, Senior Editor in Nigella Sativa (Black Seed)
Authored by PubMed
Topics: Nigella Sativa Black Seed

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Edris AE. The chemical composition and the content of volatile oil: potential factors that can contribute to the oxidative stability of nigella sativa L. crude oil. 1. J diet Suppl. 2011 Mar;8(1):34-42. Epub 2011 Jan 19.
The crude oil of nigella sativa L. (Black cumin) has well-known nutraceutical and pharmaceutical properties. The oil is prone to rapid oxidative deterioration because of its high content of poly-unsaturated fatty acids. In the current investigation, different cold-pressed crude oils of N. sativa were examined for their composition of fatty acids and oxidative stability. The data obtained were correlated with the chemical composition and content of volatile oils, which correspond to each crude oil. Results indicated that different crude oils have the same fatty acid composition, and linoleic acid was the major constituent (60.0-61.7%). Though, the oxidative stability index of the crude oils was different ranging from 2.5 hr to 26.9 hr, as revealed by the Rancimate test at 100?C and airflow rate of 20 ml/min. The results showed that there is a straightforward correlation between the volatile oil content and the oxidative stability of the corresponding parent crude oil. In addition, high ?-terpinene content in the constitution of volatile oil can also be another contributing factor for enhancing the oxidative stability of the crude oil. The data presented here draw attention to some important factors that may guide the nutraceutical and food supplement processors in their screening for the highest quality of Nigella crude oils with maximum health benefits.

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