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The composition of the essential oil isolated from the rhizomes ofZingiber zerumbetSmith was determined using GC and GC–MS. Zerumbone (74.82%), humulene (6.02%), and β-copaen-4α-ol (4.32%) were identified as major compounds.E-Bisabol-11-ol (4.32%),E-bisabol-11-ol (0.92%), β-sinensal (0.57%), and α-himachalene oxide (0.19) were reported for the first time in its oil. Zerumbone was further isolated from the crude mixture of oil and identified by FTIR, NMR (1H,13C, DEPT, HXCO, and HMBC), and mass (EI-MS) spectral data. Zerumbone showed promising antifungal activity against three phytopathogenic fungi, namelyRhizoctonia solani(EC50, 39.6 ppm),Sclerotium rolfsii(EC50, 59.3 ppm), andMacrophomina phaseolina(EC50, 147.4 ppm) compared with hexaconazole (EC50, 18.3, 13.4, and 4.5 ppm, respectively). Zerumbone has also shown concentration-dependent affect on seedling growth ofPhalaris minorRetz., compared with control andTriticum aestivumL. (wheat). Zerumbone strongly suppressed the root and shoot growth ofP. minorseedling at 1000 ppm compared with control and wheat. It exhibited no or less effect on the germination of seeds ofT. aestivum. [ABSTRACT FROM PUBLISHER]

The leaves of Cinnamomum tamala L. (Lauraceae) were collected from seven plants occurring in seven different areas of Manipur and analyzed for their essential oil and eugenol contents using GC and GC/MS. The yield of the oil was found to vary from 1.5-5.6% (w/w), on a thy weight basis. A total of 79 compounds were identified in the oils. Eugenol was found as a major compound in the leaf oils and its concentration varied from 35.1-94.3% followed by α-phellandrene (1.0-25.4%). [ABSTRACT FROM AUTHOR]

The essential oil of the fresh leaves of Lantana camera growing in Dehra Dun was analyzed by GC and GC/MS. The major constituents identified in the oil included β-caryophyllene (23.3%), α-humulene (11.5%), germacrene D (10.9%), davanone (7.3%) and Y-curcumene (6.3%). [ABSTRACT FROM AUTHOR]

The essential oil composition of the leaves of Meriandra bengalensis from India was analyzed by GC and GC/MS. Forty compounds were identified representing 97.4% of the oil. The most abundant compounds were linalool (68.4%), 1,8-cineole (17.4%) and α-terpineol (2.7%). [ABSTRACT FROM AUTHOR]

The chemical composition of the essential oil of Zanthoxylum acanthopodium DC. leaves was analyzed by GC and GC/MS. Fifty-eight compounds accounting for 75.6% of the oil were identified. The major compounds were linalool (14.3%), 9,12-octadecadien-ol (8.4%), 1,8-cineole (7.7%), 2-undecanone (7.3%), farnesol (3.6%), 9,12,15-octadecatrien- 1-ol (3.2%) and β-caryophyllene (3.0%). [ABSTRACT FROM AUTHOR]

The essential oil isolated from the aerial parts of Gynura cusimbua was analyzed by GC and GC/MS. Forty-seven constituents totaling 91.92% of the oil were identified. The major constituents of the oil are myrcene (31.0%), β- phellandrene (12.43%), eugenol (6.34%), α-humulene (6.20%), dodecyl acrylate (6.09%), α-copaene (5.61%), phytol (3.21%), germacrene D (3.0%), cryptone (2.04%), 2,4-ditertbutylphenol (1.62%), α-pinene (1.33%), α-cadinene (1.26%), caryophyllene oxide (1.24%) and β-caryophyllene (1.08%). [ABSTRACT FROM AUTHOR]