E. A. Aboutabl

TL;DR: The essential oil of the oleogum resin "Olibanum" was prepared by direct steam distillation as well as by steam distilled of an N-hexane extract as mentioned in this paper.

TL;DR: The essential oils of leaves of Pistacia khinjuk Stocks, P. chinensis Bunge and P. lentiscus L, prepared by hydrodistillation, and studied by GC and GC-MS, showed qualitative and quantitative differences as discussed by the authors.

TL;DR: The composition of hydro-distilled essential oils of the leaves of three Melaleuca species growing in Egypt, viz., M. quinquenervia (Cav.) S. T. Blake, M. armillaris Sm. and M. bracteata F. Muell was determined by GC-MS.

Abstract: Essential oils prepared by hydrodistillation of leaves (L), rhizomes (R), and stems (S) of Alpinia speciosa (JC Wendl) K Schum [= Languas speciosa (JC Wendl) Merrill], Family Zingiberaceae, were analysed by capillary gas chromatography coupled to mass spectrometry (CGC-MS) Individual components of the oil of each organ were identified by their Kovats indices and their mass spectra which were compared with published material or with data of reference compounds Quantitative determination was carried out based on peak area integration The study revealed that the oxygenated compounds constitute 417%, 521% and 428% of the oil in L, R and S, respectively They are composed mainly of terpinen-4-ol (173%, 202% and 160%) and 1,8-cineole (144%, 159% and 115%) in L, R and S, respectively The hydrocarbons constitute 522% (L), 409% (R) and 443% (S) of the oil, and comprise mainly sabinene 101% (L), 98% (R) and 75% (S) and γ-terpinene 111% (L), 93% (R) and 82% (S) The essential oils of the three organs exhibited significant antimicrobial activity against certain Gram-positive and Gram-negative bacteria as well as Candida albicans

TL;DR: The volatile constituents of Senecio glaucus subsp. coronopifolius (Maire Alexander) were investigated by capillary GC-MS of the essential oil obtained by steam distillation and of the headspace.