Abstract: The essential oil of fresh aerial part of Ammoides atlantica Coss. et Dur. (Apiaceae),obtained by hydrodistillation in a Clevenger-type apparatus, was analyzed by GC-MS. Twenty compounds were characterized representing 97.9 % of the essential oil with safranal (17.9 %), endo-borneol (17.6 %), chrysanthenone (15.5 %), filifolone (12.1 %) and camphor (11.8 %) as main components.
Abstract: The essential oil obtained by hydrodistillation of aerial parts of Ruta chalepensis subsp.
angustifolia (Rutaceae) was analyzed by GC and GC-MS. Fourteen compounds were characterized representing 98.2 % of the essential oil with the great prevalence of undecan-2-one (83.4 %).
Abstract: This study was designed to examine the chemical composition of oils and antioxidant
activity of the volatile oils and methanol extracts of Nepeta laxiflora Benth. and
Nepeta sessilifolia Bunge. Gas chromatography and gas chromatography/mass spectrometry
analyses of the volatile oils resulted in 57 compounds. The most abundant
compounds in volatile oils of N. laxiflora were a-pinene (19.7 %) and 1,8-cineole
(11.8%)and also for N. sessilifoliawere spathulenol (25.75%)and lavandulyl acetate
(16.70 %). The polar subfractions of methanol extracts of N. laxiflora and N. sessilifolia
showed the highest radical-scavenging activity (IC50 = 105.92 1.39 and
99.71 0.41 mg, respectively). In the b-carotene-linoleic acid system, the inhibition
capacity of the nonpolar subfractions ofmethanol extracts of N. laxiflora and N. sessilifolia
was found with the strongest activity (87.19 and 87.68% inhibition, respectively),
which is almost equal to the inhibition capacity of positive control butylated
hydroxytoluene.
PRACTICAL APPLICATIONS
The volatile oils and methanolic extracts of Nepeta laxiflora Benth. and Nepeta sessilifolia Bunge. showed potential antibacterial and antioxidant activities. The results support the traditional usage and also possible use of plant volatile oil and extracts in the food and/or pharmaceutical industry. We hope that the natural compounds derived from volatile oil and extracts might be useful as an antispasmodic, diuretic, antisept, antitussive, antiasthmatic and febrifuge.
Abstract: The essential oil of fresh aerial part of Oenanthe virgata Poiret (Apiaceae), obtained by
hydrodistillation in a Clevenger-type apparatus, was GC-MS analyzed. Twenty one compounds were
characterized representing 96.7 % of the essential oil with linalool (29.9 %), α-phellandrene (13.3 %), (E)
β-farnesene (12.2 %), limonene (11.9 %), hydroxycitronellal (6.8 %) and thymol (5.7 %) as the major
components.
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Abstract: Chalcone derivatives have been prepared by the condensation of various substituted aryl aldehydes and acetophenone in alkaline ethanol, while pyrimidine-2-thione derivatives were prepared by the combination of chalcones and thiourea under conventional and ultrasonic conditions. The advantages of ultrasound effect were observed and high yields of the products were obtained after 20â30 min sonication. Characterization and structural elucidation of the products have been done on the basis of chemical, analytical and spectral analysis. The results demonstrate clearly, that to achieve a high efficiency of ultrasonic systems in chemical processes.
Abstract: Potassium permanganate in the presence of [bmim]Br under solvent free conditions is used as an efficient and chemo selective method for oxidative cleavage of some hydrazone and semicarbazone derivatives to corresponding carbonyl compounds. This experiment carried out in mild condition and without any further oxidation of aldehydes to corresponding acids.
