نتایج جستجو برای: para toluene sulphonic acid

تعداد نتایج: 1026329  

2014
Somsiri Decharat

BACKGROUND The aims of this study were to determine hippuric acid levels in urine samples, airborne toluene levels, acute and chronic neurological symptoms, and to describe any correlation between urinary hippuric acid and airborne toluene. METHODS The hippuric acid concentration in the urine of 87 paint workers exposed to toluene at work (exposed group), and 87 nonexposed people (control gro...

Journal: :journal of sciences, islamic republic of iran 2010
a.m.o. abdul raheem

the ultraviolet-visible (uv) spectra of toluene, ortho-bromo and para-bromo toluene in different solvents have been studied. the electric dipole moments and polarizabilities in the molecular excited electronic states were determined. it was found that the electric dipole moments for the excited states (µ*) and the ground states (µ) of these compounds are equal, and the change in dipole moment i...

Journal: :Applied and environmental microbiology 1996
J C Chee-Sanford J W Frost M R Fries J Zhou J M Tiedje

A toluene-degrading denitrifier, Azoarcus tolulyticus Tol-4, was one of eight similar strains isolated from three petroleum-contaminated aquifer sediments. When the strain was grown anaerobically on toluene, 68% of the carbon from toluene was found as CO2 and 30% was found as biomass. Strain Tol-4 had a doubling time of 4.3 h, a Vmax of 50 micromol x min-1 x g of protein-1, and a cellular yield...

Journal: :Journal of Oil Chemists' Society, Japan 1954

Journal: :international journal of occupational and environment medicine 0
m rezazadeh azari safety promotion and injury prevention research center and school of public health, shahid beheshti university of medical sciences, tehran z naghavi konjin school of public health, alborz university of medical sciences, karaj f zayeri department of biostatistics, school of paramedical sciences, shahid beheshti university of medical sciences, tehran s salehpour national research institute of tuberculosis and lung disease, shahid beheshti university of medical sciences, tehran md seyedi national iranian oil production and distribution company, industrial health department, tehran

background: benzene, toluene, ethylbenzene and xylene (btex) are the most important toxic volatile compounds in the air and could be easily absorbed through the respiratory tract. in recent years, the risk of exposure to btex compounds, especially benzene as a carcinogen, has been considered in petroleum depot stations. objective: to assess the occupational exposure of petroleum depot workers i...

Journal: :Applied and environmental microbiology 1996
H R Beller A M Spormann P K Sharma J R Cole M Reinhard

A novel sulfate-reducing bacterium isolated from fuel-contaminated subsurface soil, strain PRTOL1, mineralizes toluene as the sole electron donor and carbon source under strictly anaerobic conditions. The mineralization of 80% of toluene carbon to CO2 was demonstrated in experiments with [ring-U-14C]toluene; 15% of toluene carbon was converted to biomass and nonvolatile metabolic by-products, p...

Journal: :علوم و تکنولوژی پلیمر 0
بخشعلی معصومی مهناز سرایی مریم حاتم زاده علی اکبر انتظامی

4-chloromethyl styrene homopolymer and its copolymers with styrene were prepared from their corresponding 4-chloromethyl styrene and styrene monomers at 1:0, 1:1, 1:3 and 1:5 mole ratios. these homo- and copolymerswere synthesized by radical polymerization in presence of aibn as initiator and dry toluene as solvent. then, chloromethyl groups were converted into azidomethyl groups on the homo- a...

Journal: :Research in microbiology 2002
M Adosinda M Martins M João Queiroz Armando J D Silvestre Nelson Lima

Azo dye derivatives of azobenzene constitute the largest group of dyes used in the textile industry and possess recalcitrant chemical groups, such as those of azo and sulphonic acid. Some microorganisms are able to degrade these aromatic compounds. In the present work, decolourisation of culture media containing azo dyes by the ligninolytic fungus Phanerochaete chrysosporium was achieved under ...

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