Investigation of the technological properties ofNigella sativa (black cumin) seed oil

Abstract

Three commercially cultivatedNigella sativa seed varieties of Turkish origin were analyzed, and the characteristics and constituents of the seed oils were reported. Presence of lipase enzyme in seed results in enzymatic hydrolysis at ordinary temperature; the free acid content of oil may increase up to 40% or higher. Black cumin seed oil might serve as a source of semi‐drying oil and fatty acids of technical grade, and the removal of free fatty acids from oil and the recovery of fatty acids were investigated.

Fatty Acid Composition of Some Ranunculaceae Seed Oils

“…The four other species did not contain any fatty acids with a A5 or A6 double bond.Fatty acids with chain lenght of 2 0 -2 4 carbon atoms were determ inated in sig nificant am ount only in C. pubescens 9.5 % of total fatty acid of 20:1. Our results were in good agreem ent with those of literature (Aitzetmiiller andTsevegsiiren, 1993 and1994;Bagby et al, 1962;Ferlay et al, 1993;Kaufmann and Barve, 1965;Rankoff et al, 1971;Smith et al, 1968;Spen cer et al, 1970;Takagi et al, 1983;Tsvegsiiren and Aitzetmiiller, 1993;Ustun et al, 1990;Viano and Gaydou, 1984;Vioque et al, 1994;Wu et al, 1980).…”

“…Fatty acid composition of twenty eight species seed oils have been already reported (Bagby et al, 1962;Ferlay et al, 1993;Kaufmann and Barve, 1965;Rankoff et al, 1971;Smith et al, 1968;Spen cer et al, 1970;Takagi et al, 1983;Tsevegsüren and Aitzetmtiller, 1993;Ustun et al, 1990;Viano and Gaydou, 1984;Vioque et al, 1994;Wu et al, 1980). Among these, six species belonging to the genus A nem one displayed fair amounts of gammalinolenic acid (G L A ) or cis-6,cis-9,cis-12 18:3, in their lipids (Smith et al, 1968, Tsevegsüren andAitzetm üller, 1993).…”

Potentials of enhancing the physicochemical and functional characteristics of <em>Nigella sativa</em> oil by using the screw pressing technique for extraction

“…sativa crude oil was extracted from the corresponding seeds by using hydraulic pressing at room temperature (Ustun et al, 1990). The dry seeds were milled into a fine powder, then batches of the powder, 250 g each, were wrapped in a thick heavy-duty cloth and the oil was extracted using an in-house made hydraulic laboratory scale pressing machine manufactured at the National Research Center, Cairo, Egypt and operated at its maximum pressure (3500 psi) for 1.0 h at room temperature.…”

YIELD AND QUALITY OF BLACK CUMIN (Nigella sativa L.) POPULATIONS: THE EFFECT OF ECOLOGICAL CONDITIONS

“…Ustun et al (1990) reported that the oil contents of black cumin seeds collected from the Kutahya, Denizli and Konya provinces were 24.4%, 29.5%, and 29.7%, respectively. Our results are similar with the findings of the above-mentioned researchers.…”