Issue 2

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Browsing Issue 2 by Author "Hatil Hashim EL-Kamali"

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    A comparative study on the chemical constituent's fatty acids and lignans from sesame seeds and flaxseeds by Gas Chromatography/Mass Spectrometry
    (Napata College, 2023-12) Hatil Hashim EL-Kamali; Gawaher Fatihalalim El Awad
    Background Sesamum indicum (sesame) and Linum usitatissimum (flaxseed) seeds are rich in fatty acids and lignans which have been stated to be the reason for their wide range of activities. Sesamum indicum seeds have been shown to possess cholesterol lowering activity, neuroprotective, anti-carcinogenic and coronary protective effect and Linum usitatissimum seeds health benefits include reducing cardiovascular diseases, decrease the risk of cancer, anti- inflammatory activity, laxative effect, osteoporosis and alleviation of menopausal symptoms. Experimental Sesamum indicum and Linum usitatissimum seeds were coarsely grounded for oil extraction and for sample preparation by methyl esterification for the GC-MS instrument. Another amount of the seeds was taken and the methanol extraction followed by n-hexane method was carried out, then injected into the GC/MS instrument. From the results of GC/MS, the fatty acid and lignan composition were determined and a comparison was made. Results The major constituents in sesame seeds fixed oil were linoleic acid, methyl ester (34.80%), oleic acid, methyl ester (30.89%), palmitic acid, methyl ester (15.41%) and methyl stearate (13.89%).The major constituents in flaxseeds fixed oil were alpha-linolenic , methyl ester (53.05%), linoleic acid, methyl ester (18.83%), palmitic acid, methyl ester (12.86%), methyl stearate (11.94%).The major constituents in sesame seeds extract were linoleic methyl ester (22.52%), vitamin E (25.18%), oleic acid, methyl ester (13.44%), and palmitic acid, methyl ester (11.66%).The major constituents in flaxseeds extract were isobutylglycerol-nitro (13.16%), D- sesamin (22.89%) and episesamin (40.49%). Conclusion Both Sesamum indicum and Linum usitatissimum seeds are a rich source of fatty acids and dietary lignans