Browsing by Author "Ali, Mohammed"

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Composition of the essential oil from the roots of Artemisia annua
(Springer, 2007) Goel, Divya; Goel, Richa; Singh, Vijender; Ali, Mohammed; Mallavarapu, Gopal Rao; Kumar, Sushil
Upon hydrodistillation, dried roots of Artemisia annua L. cultivar Jwarharti gave a pleasantly fragrant essential oil with a yield of 0.25%. GC and GC–MS analyses of the oil enabled the identification of 52 components representing 83.2% of the oil. The oil was rich in sesquiterpenes and oxygenated sesquiterpenes and had cis-arteannuic alcohol (25.9%), (E)-β-farnesene (6.7%), β-maaliene (6.3%), β-caryophyllene (5.5%), caryophyllene oxide (4.4%) and 2-phenylbenzaldehyde (3.5%) as its major components. The oil was found to possess considerable fumigant activity and ability to repel adult Tribolium castaneum beetles.
Essential oils of petal, leaf and stem of the antimalarial plant Artemisia annua
(Springer, 2006) Goel, Divya; Singh, Vijender; Ali, Mohammed; Mallavarupu, Gopal Rao; Kumar, Sushil
The chemical composition of the essential oils obtained from petals, leaves and stems of the flowering stage of plants of Artemisia annua cultivar Jwarharti was analyzed by gas chromatography mass spectrometry (GC-MS); 86, 77, and 63 compounds were identified in the leaf, petal, and stem oils, respectively. Large compositional differences were detected between the three oils. The petal and leaf oils were rich in monoterpenes. The stem oil was rich in sesquiterpenes. Camphor, present in the leaf oil, was absent from petal oil.
Volatile metabolite compositions of the essential oil from aerial parts of ornamental and artemisinin rich cultivars of Artemisia annua
(Taylor & Francis Group, 2008) Goel, Divya; Mallavarupu, Gopal Rao; Kumar, Sushil; Singh, Vijender; Ali, Mohammed
The essential oils of the aerial parts (flowers, leaves and stems) of the artemisinin rich cultivar ‘Jeevanraksha’ and artemisinin poor ornamental type cultivar Suraksha of Artemisia annua, grown at New Delhi, were characterized for their metabolite composition by GC and GC/MS analyses. Ninety-seven compounds comprising 91.3% of the total oil of ‘Jeevanraksha’ were identified. Forty-three monoterpenes (56.6%), 32 sesquiterpenes (31.1%), and 2 diterpenes (0.2%) comprised bulk of the oil (87.9%). The oil was devoid of artemisia ketone and contained camphor (13.5%), 1,8-cineole (9.4%), trans-sabinol (7.1%), p-mentha-1(7), 5-dien-2-ol (6.3%), myrcene (4.7%), germacrene D (4.4%), (E)-β-farnesene (3.9%), β-caryophyllene (3.7%), dihydroartemisinic lactone (3.0%) and p-cymene (2.0%) as the major constituents. Eighty-six compounds representing 93.3% of the composition were identified in the Suraksha oil. This oil contained artemisia ketone (47%), 1,8-cineole (8.4%), camphor (5.9%) and α-pinene (5.2%) as the major components. Many compounds were detected in the A. annua oil for the first time. Consistent with hybrid origin of the cultivar ‘Jeevanraksha’, its oil possessed characteristics reported earlier for the corresponding essential oils of the A. annua accessions of Vietnamese origin and North-American accessions.