Background: Roses have been used since ancient time in rituals, cosmetics, perfumes, medicines and aromatherapy. Turkey, the main rose oil producer in the world, uses R. damascena Mill. for rose oil production. Objective: In this work a comparative survey on chemical composition of essential oils of Rosa damscena Mill. from different locations of Iran has been proposed in industrial scales. ...

Methods were developed for the analysis of acetonitrile and its metabolite cyanide in the blood of rats exposed to acetonitrile. Acetonitrile was analyzed by the headspace technique coupled to gas chromatography with detection by flame ionization, and cyanide was analyzed by high-performance liquid chromatography with fluorescence detection (lambdaex = 418 nm and lambdaem = 460 nm) after deriva...

Accurate methods are described for the qualitative and quantitative determination of medazepam, diazepam, and nitrazepam in 5 ml of whole blood. Medazepam and diazepam are analyzed intact and nitrazepam is chromatographed as its trimethylsilyl derivative by flame-ionization gas-chromatography on “1% OV-17.” A supplementary column of “2% OV-1” is used to separate nitrazepam TMS from diazepam whe...

An improved, simple gas chromatography-flame ionization detection (GC-FID) method was developed for measuring the products of acetone-butanol-ethanol (ABE) fermentation and the combined fermentation/separation processes. The analysis time per sample was reduced to less than 10 min compared to those of a conventional GC-FID (more than 20 min). The behavior of the compounds in temperature-program...

The zinc-cadmium oxide (ZnO-CdO) nanocomposites with different weight percentages of cadmium oxide (CdO) nanoparticles were successfully synthesized by the sonochemical method using zinc and cadmium nitrates as precursors to probe their nano-structured surfaces for the decomposition reactions of chloroethyl phenyl sulfide (CEPS) as a surrogate of sulfur mustard agent simulant. Scanning electron...

BACKGROUND Although the pigment composition of Pompeian wall paintings has been the object of several studies, a comprehensive characterization of paint binder components is still lacking. This work aimed investigated at a molecular level the binder composition differences among wall paintings belonging to different periods of Pompeii's history. Analytical investigations were performed on repre...