acetonitrile used as a solvent in manufactures and affects to central nervous system from inhalation exposure. the aim of this study was to develop a micro-solid phase extraction method for  the determination of acetonitrile in the air matrix. the sampling was performed with a small diameter fused silica fiber coated with a thin film of stationary phase and was subsequently desorbed and analyze...

Increasing interest in energetic particle effects on weather and climate has motivated development of a miniature scintillator-based detector intended for deployment on meteorological radiosondes or unmanned airborne vehicles. The detector was calibrated with laboratory gamma sources up to 1.3 MeV and known gamma peaks from natural radioactivity of up to 2.6 MeV. The specifications of our devic...

The characterization of essential oils of Mentha aquatica L grown in two Provinces of Vietnam was performed by means of gas chromatography-flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS) techniques. The major constituents of the essential oils were epi-bicyclosesquiphellandrene (58.9% and 52.4% respectively) and limonene (21.1% and 31.4% respectively) for Tha...

The proportions and constituents of the essential oils flowers leaves Primula veris subsp. columnae were determined, antioxidant antimicrobial (antibacterial antifungal) properties their methanol extracts investigated. Percentage ratios main components plant, which grows naturally, detected by extracting flower leaf volatile oils. oil identified with Gas Chromatography Mass Detector-Flame Ioniz...

Charging-up is a phenomenon observed while working with gaseous ionization detector having dielectric. It comprised of two processes: the polarization dielectric due to exposure high electric field and collection charges on surface. Both these charging-up processes affect gain as they change local configuration around Here, we have studied effects using experimental techniques for single GEM de...