Objectives—Despite observation of adverse reproductive eVects of toluene, including alterations of serum gonadotropins (luteinising hormone (LH) and follicle stimulating hormone (FSH)) in humans, little is known of the mechanism of toxicity. The hypothesis was tested that toluene acutely suppresses pulsatile gonadotropin secretion by measuring LH and FSH at frequent intervals during controlled ...

The basic mechanisms underlying solvent tolerance in Pseudomonas putida DOT-T1E are efflux pumps that remove the solvent from bacterial cell membranes. The solvent-tolerant P. putida DOT-T1E grows in the presence of high concentrations (e.g., 1% [vol/vol]) of toluene and octanol. Growth of P. putida DOT-T1E cells in LB in the presence of toluene supplied via the gas phase has a clear effect on ...

Benzylsuccinate synthase (BSS) initiates anaerobic toluene biodegradation, and BSS genes have been found in several nitrate- and iron-reducing organisms. Here, two new putative bssA genes were identified in a methanogenic toluene-degrading culture. Transcription was upregulated with toluene but not with benzoate, consistent with the proposed function. These are the first bss sequences from a me...

The very sensitive, fairly selective direct spectrophotometric method for the determination of trace amount of vanadium (V) with naphthalene -1, 5 -diamine has been developed. Naphthalene -1, 5 -diamine reacts in slightly acidic (0.0001– 0.001 M H2SO4 or pH 4.0–5.5) alcohol media with vanadium (V) to give a red–violet chelate which has an absorption maximum at 531 nm. The stoichiometric composi...

the catalytic oxidation of toluene to benzoic acid in the liquid phase has been studied in an un-stirred tank reactor. low concentration of acetic acid was added in order to increase the solubility of the catalyst in toluene. the dependence of the rate of reaction on the concentration of toluene catalyst and oxygen pressure was studied. it has been suggested that liquid phase oxidation of tolue...

Benzene, Toluene, Ethyl Benzene and Xylene are volatile organic compounds (VOCs) with approximately similar physical and chemical characteristics. Benzene and Ethyl-benzene are known carcinogen as well as they affect the circulatory, nervous, and reproductive and respiratory systems. Toluene and Xylene also damage the nervous and reproductive systems. The main purpose of this study is to determ...

polyethylene imide was synthesized from the reaction of high density polyethylene grafted maleic anhydride (pe-g-ma) and 1,4-diaminobutane in boiling xylene. the chemical compositions of the reaction products were examined by fourier transform infrared spectroscopy. different conditions and parameters like the effect of temperature, time, monomer concentration and oxygen on the extent of reacti...

Transparent, crack-free mesoporous silica sol–gel monolith 2 was prepared from the hydrolysis of Si(OMe)4 in MeOH containing ethylene glycol (HOCH2CH2OH). Gradual exposure of the product monolith 1 to MeOH/H2O and then H2O helps prevent cracking of the monolith. Direct reaction of chelating diamine H2N(CH2)2NH(CH2)3Si(OMe)3 with 1 gave diamine-grafted monolith 3. Imprint-grafting of monolith 1 ...