abderaz the composition of the essential oil obtained from the seeds of ammi majus l. which collected from province of khozestan in the southwest area of iran.the oils was analyzed by gas chromatography mass spectrometry (gc-ms). twenty - eight components have been identified in the extract of a. majus l. with toluene (3.766%), thymol (12.811%), carvacrol (37.811%) as major components, respecti...

background and objectives: helichrysum oligocephalum dc. (compositae)  is an endemic plant in iran that has been recommended by iranian traditional and folk medicine practitioners for gastrointestinal complaints. the plant is rich in essential oil and in the present investigation, the volatile composition of the species has been determined. methods: the light yellow essential oil from the aeria...

background and objectives: ziziphora clinopodioides is a perennial herb and grows widely in west and northwest of iran. the aerial parts are used as appetizer, carminative and antiseptic as well as for the treatment of medical conditions such as high blood pressure, asthma hyperhidrosis, palpitation and insomnia methods: the aerial parts of ziziphora clinopodioides lam. were extracted by ethano...

Peppermint has considerable commercial value and widely cultivated for essential oil production, especially menthol. The aim of this study was to determine the quantitative expression of pulegone reductase (pr), menthofuran synthase (mfs) and limonene synthase (ls) genes in menthol biosynthesis pathway in Mentha x piperita , using semiquantitative RT-PCR analysis and evaluating menthol producti...

      The volatile oil obtained by hydrodistillation of the aerial parts of Matricaria chamomilla L. (Asteraceae) growing in Botanical Garden, Isfahan University of Medical Sciences, Iran, was investigated by gas chromatography (GC) and GC/ mass spectrometery (MS). Sixty-three components were characterized, representing 86.21% of the total oil components detected. α-B...

a rapid and reproducible method is described that employs solid phase extraction (spe) using dichloromethane, followed by gas chromatograph-mass spectrometry for the determination of toxic toluene, xylene and cumene (txc) from different lake water of dhaka mega city of bangladesh. the method was applied to detect and quantify txc in water samples collected from surface and 30 cm depth of water....

Substances classified as unknown or variable composition, complex reaction products biological origin (UVCB) present a challenge for environmental hazard and risk assessment. Here, we novel approach whole-substance bioconcentration testing applied to cedarwood oil—an essential oil composed of volatile, hydrophobic organic chemicals. The method yields whole-body elimination rate constants mixtur...

Artemisia argyi leaf is a widely used traditional Chinese medicine (TCM). In this work, for the first time, the separation and identification of volatile constituents in Artemisia argyi flowers is performed. Gas chromatography-mass spectrometry (GC-MS) with solid-phase microextraction (SPME) is developed for the fast analysis of volatile constituents in the flowers. Several headspace SPME param...

Comparative analysis of common essential constituents between single herbs, Ramulus cinnamomi (RC) and Herba schizonepetae (HS), and herbal pair (HP). RC – HS was performed by gas chromatography-mass spectrometry (GC-MS) combined with alternative moving window factor analysis (AMWFA) and temperatureprogrammed retention indices (PTRIs). In all, 33, 37, and 43 essential chemical components in ess...