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The chemical composition of the essential oil of Juniperus oxycedrus from Algeria was studied for the first time. The oil was obtained from the leaves of the plant by hydrodistillation and analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) techniques. The yield of essential oil is 0.1%, based on dry weight. Eighty-nine components representing 82.3% of the total oil were identified. The results show that oxygenated monoterpene (41.0%) composes the major part of oil and the main components are trans -pinocarveol (7.0%), cis -verbenol (6.3%), and manoyl oxide (6.0%). A comparison with oils from J. oxycedrus complex (subspecies and varieties) of other countries reported in literature is discussed briefly. [ABSTRACT FROM AUTHOR]

The essential oil of Lavandula stoechas L. growing spontaneously in Algeria was investigated by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) for the first time. The oil was isolated from the aerial parts of the plant (leaves and flowers) by distillation in a yield of 1.1%. Fifty-four components amounting to ca . 73% of the oil were identified, the major component being fenchone (31.6%). The other significant constituents were camphor (22.4%), p -cymene (6.5%), lavandulyl acetate (3.0%), and a-pinene (1.0%). Our results show that the oil consists mainly of oxygenated monoterpenes (62.0%). A comparison with oils from other Lavandula stoechas from other countries reported in literature shows qualitative and quantitative differences. [ABSTRACT FROM AUTHOR]

The chemical composition of the hydrodistilled essential oil of the air-dried aerial parts of wild red wormwood ( Artemisia campestris L.) was analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The species is poor in essential oil (yield = 0.1%). Seventy-one constituents representing 57.0% of total oil have been identified. The result show that oxygenated compounds compose the major part of oil (43.7%) and the main components are ( Z,E )-farnesol (10.3%) followed by cedrol (5.4%) and verbenone (3.8%). Toxic ketones such as α- and β-thujone are not detected in the oil. [ABSTRACT FROM AUTHOR]