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sur le développement des zones arides et semi-arides

Titre : Chemical Composition and Antioxidant Activity of Essential Oil from Flower Buds and Leaves Extracts of Pulicaria Crispa and Pulicaria Incisa

التركيب الكيميائي و النشاط المضاد لألكسدة للزيوت الطيارة المستخلصة من أوراق و أزهار كل من نبات شاي الجبل و القطقاط

Auteur : Migdadi, Rawia Salem

Université de soutenance : Yarmouk University

Grade : Master of Science (MS) 2017

Résumé
The SPME oil from P. incisa leaves and flowers were dominated by oxygenated monoterpenes while hydro-distillation (HD) oils were dominated by phenolic compounds , the flowers oil obtained by SPME contains cis-verbenol , 2E-octene and E-caryophyllene as a major compounds, the oil from leaves of P. incisa obtained by SPME has thymoquinone , methyl-Ȗ-ionone and BHA while the oils of leaves and flowers obtained by HD has BHA , acetosyringone and methyl-Ȗionone as major component , the chemical composition of oils from leaves and flowers of P. crispa obtained by HD were dominated by oxygenated monoterpenes , the oils from flowers obtained by SPME were dominated by oxygenated monoterpenes while the oils from leaves were dominated by oxygenated sesquiterpenes,the leaves oil obtained by SPME has 7-epi-Įeudesmol, 11-acetoxyeudesman-4-Į-ol and cembrene as major components but the oil from flowers P. crispa obtained by SPME has crysanthenone, Z-terinine and Z-jasmone , the oil from leaves obtained by HD has crysanthenone , pcymene-8-ol and vanillin but the oil from flowers has crysanthenone , p-cymene8-ol and benzaldehyde dimethyl acetal .The antioxidant activity of the crude extract of leaves and flowers of P. incisa and P. crispa showed that the BuOH extract contain the highest amount of phenolic and flavonids compounds , exhibited the greatest antioxidant activity. The phytochemical screening of the crude extracts from leaves and flowers of P. incisa and P. crispa revealed the presence alkaloids, tannins, flavonoids and terpenoids.

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