Green Tea

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Abstract Green tea and rosemary are known as highly potent antioxidant drugs. Little idea is known about their leaf fatty acids, steroids and terpenoids. Thus, the aim of this work was to investigate the lipoidal matter composition of their leavesand to test for antimicrobial activities of both leaf extracts as a comparative study as well as their 1:1 extract mixture. GC/MS analysis of the unsaponifiable part of the light petroleum fraction of 70% ethanolic extract resulted in the identification of phytol as the major constituent (36.24%) in green tea and α- amyrin as the major constituent (38.8%) in rosemary leaves. Palmitic acid was detected as the main saturated fatty acid in both plants with much higher concentration in green tea (35.70%)…show more content…
Green tea is made from leaves that have undergone minimal oxidation during processing(1). Green tea contain a variety of enzymes, amino acids, carbohydrates, lipids, sterols, related compounds, dietary minerals, and phytochemicals such as polyphenols, flavanols, and caffeine. Polyphenols found in green tea include but are not limited to epigallocatechin gallate, epigallocatechin, epicatechingallate, and epicatechin; flavanols such as kaempferol, quercetin, and myricitin are also found in green tea (1). Numerous claims have been made for the health benefits of green tea based on its chemical composition. Preliminary research on many of these claims is promising, but many also require further study to evaluate.(1,…show more content…
The results are listed in Table 3. The triterpene, α-amyrin was found to be the major constituent followed by the diterpene, eicosane with concentration percentage of 38.08 and 27.61 respectively. The steroids, ω- sitosterol, stigmasteryltosylate and stigmastan-3,5-diene were detected in percent concentrations 4.24 , 2.04 and 1.4 respectively. Also, the triterpene, squalene and the meroterpene, ferruginol were also detected in 2.4 and 1.61 % concentrations respectively. GLC analysis of fatty acid methyl esters identified the presence of 17 fatty acids. Fourteen of the seventeen were saturated ones .The results are listed in Table 4. Palmitic acid is the major saturated fatty acid followed by 4- methyloctanoic acid and 4- methylnonanoic acid with percent concentrations of 12.3, 9.95 and 5.6 respectively. The total percent of the unsaturated fatty acids were calculated as 48.53%. The major unsaturated fatty acid is 1, 14- eicosadienoic acid followed by Petroselinic acid with percent concentrations of 26.4 and

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