Ele, Estifanos (PhD)Assefa, Mekides2022-03-292023-11-092022-03-292023-11-092021-08-31http://etd.aau.edu.et/handle/12345678/30986In this study essential oils extracted from coriander seed and aerial parts of the samples collected from Sululta, Jimma and Wolaita Sodo were analyzed using GC-MS. Similarly, fatty acids from the coriander seeds were extracted and analyzed in their methyl ester form. The antioxidant activities of the crude extracts of coriander aerial parts were evaluated using a UV-Vis spectrophotometer. The optimum time for extraction of essential oil was determined to be 5 h. The concentration of each fatty acid component was evaluated based on an external standard prepared from linoleic acid ethyl ester. From the analyzed data, the sample collected from Sululta showed the highest number of compounds and a higher amount of Petroselinic acid (107.53 μg/mL) compared to Wolaita Sodo (41.12 μg/mL) and Jimma (20.41μg/mL). In this study, 18.24-22.37% linoleic acid (omega-6) was determined. The P/S index values were calculated for all oil and found to be between 1.69 and 2.39. The total number of compounds identified in the essential oils extracted from seeds collected from Jimma, Sululta and Wolaita Sodo were 7, 9 and 15 with combined percent areas of 99.64, 75.14 and 96.68, respectively. The essential oils were dominated by linalool, which accounts for 36.72%-88.50% of the total amount. From the aerial parts of the plants collected from Jimma, Wolaita Sodo and Sululta, 45, 21 and 19 different compounds were identified, respectively. Decanal and (E)-2-decenal were the major components of the essential oils. The crude methanol extract of coriander aerial parts from all three sample areas showed good radical scavenging activities with values ranging from 91.091% to 92.295% at a concentration of 500 μg/mL.enCoriander (Coriandrum Sativum L.) Seeds and Aerial PartsPhytochemicalsAntioxidant ActivityP/S IndexThesis