نتایج جستجو برای: methyl ethyl ketone mek
تعداد نتایج: 152553 فیلتر نتایج به سال:
Natural gas is odorized by trace amount of mercaptans and organic sulfides to be recognized by individuals, in case of gas leakage. These materials may pollute the environment particularly in injection station at local gas plants. Therefore, removal of sulfur compounds from the remaining odorant in barrels is essential. To remove the residual portion of mercaptans and alkylsulfide mixtures diff...
Background and purpose: Biological monitoring for workers exposed to solvents includes complementary environmental monitoring which is useful in toxic chemical risk assessments. The aim of this study was environmental and biological monitoring of workers exposed to volatile organic compounds (VOCs) in petrochemical industry. Material and Methods: Air and urine samples were collected from 104 i...
This work addresses the treatment of a complex industrial effluent containing high concentrations metals and spiked with two organic solvents (diethylketone – DEK, methyl ethyl ketone - MEK) using an eco-friendly approach. The system herein proposed consists bio-barrier that combines adsorption capacity sepiolite properties Streptococcus equisimilis biofilm proven ability in degradation bioremo...
چکیده: خواص مولکولی 5کمپلکسni(ii) شیف باز که شامل کره کئوردیناسیون nnos: methyl-2-{n-[2-(acetone)triflourolidynenitrilo]ethyl}amino-1-yclopentenedithi-ocarboxylate l1= methyl-2-{n-[2-(acetone)ethylidyneni-trilo]ethyl}amino-1-lopentenedithi-ocarboxylate l2= methyl-2-{n-[2-(acetone)phenylidy-nenitrilo]ethyl}amino-1-cyclopentenedithi-ocarboxylate l3= methyl-2-{[1-methyl-2-(ace-tone)ethylid...
Exposure monitoring by personal diffusive samplers, biological monitoring of toluene exposure by urinary hippuric acid determination, haematology, serum biochemistry for liver function, and a subjective symptom survey by questionnaire were conducted on 303 male solvent workers. They were exposed to a mixture of solvents including toluene (geometric mean 18 ppm), methyl ethyl ketone (MEK; 16 ppm...
We determined the toxicity of mixtures of ethyl acetate (EA), isopropyl alcohol (IPA), methyl ethyl ketone (MEK), toluene (TOL) and xylene (XYL) with half-maximal effective concentration (EC50) values obtained using human hepatocytes cells. According to these data, quantitative property-activity relationships (QPAR) models were successfully proposed to predict the toxicity of mixtures by multip...
Conventional solvent-based methods are still the most practical approaches for recovery of polyhydroxyalkanoate (PHA) polymer from cellular biomass, even though potential alternatives exist, including chemical, mechanical, and enzymatic methods. It is still necessary, however, to avoid dangerous and environmentally unfriendly solvents (e.g., chloroform and dichloromethane) in the polymer recove...
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