abstract the genus hymenocrater, belong to the lamiaceae family, consist of 21 species throughout the world. in iran, about 9 species are present, of which some are endemic. plants belonging to these genuses are pharmacologically active and have been used in folk medicine all around the world. the aim of the present study was to detect the essential oils composition of hymenocrater longiflorus ...

mulberry pyralid, glyphodes pyloalis walker is an important pest on mulberry. the essential oil of rosemary rosemarinus officinalis l. (lamiales: lamiaceae) has been investigated on toxicity and physiological characteristics of this moth under controlled conditions. the major compounds of the oil were analyzed as 1, 8 cineol (20.021%), borneol (7.17%), camphor (6.541%), geraniol (6.281%), camph...

chamomile is a medicinal plant with high economic value. in this research, 20 chamomile ecotypes collected from different regions of iran were evaluated for genetic and chemical diversity. dna was extracted by ctab and polymerase chain reaction was performed using 13 rapd markers. essential oils extraction was performed by water distillation using clevenger system. components of the essential o...

A fast gas chromatography-mass spectrometry (GC-MS) method with minimum sample preparation is described for early diagnosis of tuberculosis (TB). The automated procedure is based on the injection of sputum samples which are then methylated inside the GC injector using thermally assisted hydrolysis and methylation (THM). The THM-GC-MS procedure was optimized for the injection of sputum samples. ...

Compared to other analytical platforms, comprehensive two-dimensional gas chromatography coupled with mass spectrometry (GC×GC-MS) has much increased separation power for analysis of complex samples and thus is increasingly used in metabolomics for biomarker discovery. However, accurate peak detection remains a bottleneck for wide applications of GC×GC-MS. Therefore, the normal-exponential-Bern...

Results of the investigation polycyclic aromatic hydrocarbons (PAHs) content in fine coal powders prepared according to a special procedure within size classes (-0.2+0.1) mm, (-0.1+0.063) (-0.063+0.04) (-0.04) mm for ten different ranks (B, D, G, Zh, K, KS, OS, SS, T, A) from Kuznetsk basin are presented. The qualitative and quantitative PAHs samples was determined by means GC-MS using SCION SQ...

A quantitative analysis of the individual compounds in tobacco essential oils is performed by comprehensive two-dimensional gas chromatography (GC x GC) combined with flame ionization detector (FID). A time-of-flight mass spectrometer (TOF/MS) was coupled to GC x GC for the identification of the resolved peaks. The response of a flame ionization detector to different compound classes was calibr...

New mass spectral deconvolution algorithms have been developed for comprehensive two-dimensional gas chromatography/quadrupole mass spectrometry (GC × GC/qMS). This paper reports the first use of spectral deconvolution of full scan quadrupole GC × GC/MS data for the quantitative analysis of polycyclic aromatic hydrocarbons (PAH) and polycyclic aromatic sulfur heterocycles (PASH) in coal tar-con...