in this study, a simple and reliable method by gas chromatograph–mass spectrometry (gc–ms) was developed for the fast and regular identification of 3, 4-mdma impurities in ecstasy tablets. in so doing, 8 samples of impurities were extracted by diethyl ether under alkaline condition and then analyzed by gc–ms. the results revealed high mdma levels ranging from 37.6% to 57.7%. the gc-ms method sh...

in our study, bioactivity of essential oil extracted from ginger (zingiber officinaleroscoe.) that belongs to family zingiberaceae was analyzed. ginger rhizome oil was found to be effective against a range of bio-deteriogens. the minimum inhibitory concentration (mic) value was determined by poisoned food technique and volatile activity assay. the study demonstrates that essential oil had a wid...

background and objectives: ferula assa-foetida (asafoetida) is a native iranian species which grows in different regions and climates in iran. the plant is well known in iranian traditional medicine as well as folk medicine for treatment of diseases. several studies have been carried out on the essential oil of this species collected from different areas of iran. this study is the first report ...

background : among the industrial activities that may cause odor nuisance problems, baking waste one is of the sources of bad odor, and therefore individuals complain from the industry. the aim of this study was to evaluation of pollutants released from poultry rendering plant and also performance of existing refiners in removing these pollutants.   methods : in this study, 66 air samples were ...

the essential oils of the aerial parts of three different artemisia species (a.scoparia, a. diffusa, a. turanica ) growing wildly in the northeast of iran were analyzed by gc-ms. twenty-two, twenty-six, and thirteen components were identified in the essential oils of these plants, respectively. the major constituents of the oil ofa. scoparia were b-pinene (16.10%), carvacrol (13.81%), limonene ...