Dopamine (3, 4-dihydroxyphenyl ethylamine, DA) is one of the most important neurotransmitters in the mammalian central nervous system. This paper presents a new approach to detect dopamine using an electrochemical sensor based on a composite made out of chitosan-stabilized silver nanoparticles and p-toluene sulfonic acid-doped ultrathin polypyrrole film, which exploits the synergy between the c...

Abstract Biodiesel is a reliable and promising replacement of fossil diesel. It stable, less toxic can be produced from sustainable resources, including variety raw materials. Currently, the most widely used are vegetable oils (edible nonedible), due to their availability. The present paper considers potential obtaining fatty acid ethyl esters (FAEE) corn oil, which byproduct bioethanol product...

introduction: toluene is an organic solvent that it is one of the byproducts in the coke industry. exposure to toluene causes central nervous system dysfunction and others disorders. many workers are exposed to toluene due to leakage from tracks. therefore the aim of this study was to determine the levels of exposure through environmental and biological monitoring of toluene methods: air toluen...

Polystyrenes containing up to about 20 mol % sulfonic acid are reproducibly and readily prepared by the sulfonation of polystyrene at 50°C with acetyl sulfate in 1,2-dichloroethane solution. The metal salts of sulfonated polystyrene possess extremely high melt viscosities and are soluble in single solvents such as toluene and THF only at very low sulfonate levels. Such properties are the result...

Abstract The peracetalization of a β-hydroxy hydroperoxide derived from methyl oleate was studied using benzaldehyde as model substrate to give the corresponding fatty 1,2,4-trioxane. desired product obtained mixture regioisomers but only one diastereoisomer each formed. nature acid catalyst and both p-toluene sulfonic (PTSA) Amberlyst A35 (A35) were found be efficient homogeneous heterogeneous...