## 3 Results and Discussion  
The fatty acids composition of the studied seed oils is presented in Table 1, where fifteen individual fatty acids were detected. All the oils contained almost the same fatty acids, except for the case of pentadecanoic acid (C15:0) which was detected only in purslane seed oils, docosadienoic acid (C22:2) which was identified in linseed and luffa oils, and lignoercic acid (C24:0) which was found only in pumpkin oil. Polyunsaturated fatty acids were the most abundant class in all the studied oils (55.92-85.51%), followed by monounsaturated and saturated fatty acids (MUFA and SFA, respectively) in amounts that differed depending on the studied oil. This result is within the same range with previous reports regarding linseed [17], luffa [26], purslane [11], and pumpkin [17] seed oils where unsaturated fatty acids were the predominant class, although at slightly different amounts. These differences could be attributed to different extraction methods between the studies or the different genotypes tested, as already pointed out [PERSON] et al. [10; 11]. Moreover, fatty acids profile varied among the studied oils. In particular, \(\alpha\)-linolenic acid (C18:3n3) was the most abundant fatty acid in the case of linseed oils (71.90%, 70.93%, and 65.62% for linseed oil 1, 2, and 3, respectively), while the second most abundant compound was linoleic acid (C18:2n6c) followed by oleic (C18:1n9c), palmitic (C16:0), and stearic (C18:0) acids. Similarly, to our study, [PERSON] et al. [46] suggested \(\alpha\)-linolenic as the most abundant fatty acid, while the next most important fatty acids were oleic, palmitic, and stearic acids. However, despite the similarities, the detected amounts in the tested samples of our study were higher than these reports, especially in the case of \(\alpha\)-linolenic acid, indicating differences in the extraction method and probably the genotypes tested. Moreover, [PERSON] et al. [20], who tested two linseed varieties (Bethune and Solal), also observed significant differences in fatty acids profile, especially in the case of \(\alpha\)-linolenic acid which was considerably higher in Bethune compared to Solal genotype which was a low linolenic mutant (64.02 g/100 g fatty acids and 3.96 g/100 g fatty acids,respectively). These effects could be also observed in our study, where the fatty acids profile differed among the three linesed tested oils. However, according to [PERSON] et al. [47], seed pretreatment may significantly increase extraction yield without affecting the fatty acids profile, while [PERSON] et al. [48] did not detect differences in fatty acids profile of oils extracted with solvent or ultrasonic assisted. In the case of luffa seed oil, it included mostly linoleic acid (61.86%) followed by oleic acid and palmitic detected in similar amounts (15.14% and 13.77%, respectively), and stearic acid which was found in lesser amounts (6.99%). A similar profile was reported by [PERSON] et al. [26] and [PERSON] et al. [39], although they reported a lower content of linoleic acid compared to our study (43.7%, 46.8%, and 46.1%, respectively). It seems that as in the case of linesed oil the detected differences could be attributed to the extraction methods since [PERSON] et al. [26] extracted oil via supercritical and solvent extraction, while [PERSON] et al. [39] implemented the Soxhet extraction method. Purslane seed oil was also a rich source of \(\alpha\)-linolenic acid (41.25%) and linoleic acid (34.10%), followed by palmitic, oleic, and stearic acids (14.1%, 5.2%, and 3.0%, respectively). In contrast, [PERSON] et al. [17] reported a slightly higher content of linoleic than \(\alpha\)-linolenic acid (34.1% and 32.4%, respectively), while [PERSON] et al. [49] suggested significant differences between wild and cultivated genotypes of purslane, with wild ones containing significantly higher amounts of \(\alpha\)-linolenic acid. Regarding the extracting method, [PERSON] et al.