No abstract

Essential oil composition and antibacterial activity of Calendula arvensis L. were investigated. The essential oil of aerial part was obtained through hydro-distillation using a Clevenger type apparatus with 0.38 (v/w) yield. The essential oil components were determined by GC-MS analyses. Thirty-six components were identified in the essential oil that represented 91.8 % of the oil. The major components of the essential oil were δ-cadinene (14.8 %), epi-cubebol (10.7 %), α-cadinol (8.5 %), cubenol (7.7 %), cubebol (7.2 %), 1-epi-cubenol (5.4 %) and ledene (5.1 %). Antibacterial activity of essential oil was observed against Staphylococcus aureus ATCC 29213, Bacillus cereus ATCC 14579, Pseudomonas aeruginosa ATCC 27853 and Escherichia coli ATCC 25922 by using a broth microdilution. The essential oil showed weak inhibitory activity against E. coli and B. cereus at 8 mg/mL. The oil didn't show any antibacterial activity against S. aureus and P. aeruginosa. These results revealed that the oil was rich in oxygenated sesquiterpenes as well as had a weak antimicrobial activity.

This paper includes the result of the first study of the chemical composition, antioxidant, antiinflammatory, and antidiabetic activities of the essential oils of Glebionis coronaria (L.) Cass. ex Spach and Glebionis segetum (L.) Fourr. from Turkey. In the current study, nine and twenty-eight constituents were determined in the essential oils of aerial parts of G . coronaria (GCE) (92.1%) and G . segetum (GSE) (90.0%), respectively. The main components were capillin (65.9%) in GCE, capillene (53.4%) in GSE. The essential oil compositions were evaluated and compared with previous researches. In the current study, the plants are classified as chemotypes of Glebionis species. GCE and GSE showed poor and very poor DPPH radical scavenging activity, respectively. GCE and GSE exhibited significant and strong antiinflammatory activity against the 5-lipoxygenase enzyme, respectively. Also, GCE and GSE displayed moderate and weak antidiabetic activity against the α-glucosidase enzyme, respectively. Polyacetylenes were determined as the main class of compounds in GCE and GSE and had a notable antiinflammatory activity.

No abstract

INTRODUCTION: Gypsophila species have very high medicinal and commercial importance and also contains interesting natural substances. However, there is no report on the essential oil and fatty acid composition of any Gypsophila species. This prompted us to investigate the essential oil and fatty acid composition of Gypsophila laricina Schreb. METHODS: Plant materials were collected during the flowering period. Essential oil composition of aerial parts of Gypsophila laricina Schreb. were analysed by gas chromatography and gas chromatography-mass spectrometry. And the fatty acid compositions were analysed by gas chromatography-mass spectrometry. RESULTS: Sixty-six and ten compounds were identified in the essential oil and fatty acid of G. laricina Schreb. respectively. The major components of the essential oil were hexadecanoic acid (27.03%) and hentriacontane (12.63%). The main compounds of the fatty acid were (Z,Z)-9,12-octadecadienoic acid methyl ester (18: 2) 40.4%, (Z)-9-octadecenoic acid methyl ester (18: 1) 35.0 % and hexadecanoic acid methyl ester (16: 0) 13.0%. DISCUSSION AND CONCLUSION: The result showed that the fatty acid composition are rich in polyunsaturated fatty acids. The essential oils of G. laricina Schreb. were dominated by fatty acid derivatives and n-alkanes. We believe the results obtained u n c o r r e c t e d p r o o f from this research will stimulate further research on the chemistry of Gypsophila species.