نتایج جستجو برای: toluene alkylation

تعداد نتایج: 13620  

Journal: :Chemistry 2013
Nathan B Bennett Douglas C Duquette Jimin Kim Wen-Bo Liu Alexander N Marziale Douglas C Behenna Scott C Virgil Brian M Stoltz

Eeny, meeny, miny ... enaminones! Lactams and imides have been shown to consistently provide enantioselectivities substantially higher than other substrate classes previously investigated in the palladium-catalyzed asymmetric decarboxylative allylic alkylation. Several new substrates have been designed to probe the contributions of electronic, steric, and stereoelectronic factors that distingui...

Journal: :Applied and environmental microbiology 1996
A E Mars J Houwing J Dolfing D B Janssen

Burkholderia (Pseudomonas) cepacia G4 was cultivated in a fed-batch bioreactor on either toluene or toluene plus trichloroethylene (TCE). The culture was allowed to reach a constant cell density under conditions in which the amount of toluene supplied equals the maintenance energy demand of the culture. Compared with toluene only, the presence of TCE at a toluene/TCE ratio of 2.3 caused a fourf...

Journal: :Bioscience, biotechnology, and biochemistry 2002
In Seon Kim Jae Han Shim Yong Tack Suh

A bacterial isolate, Pseudomonas putida CN-T19, could grow in a two-phase medium with toluene up to 50% (v/v). Changes in fatty acid composition and membrane fluidity of the isolate were investigated to understand how this microorganism responds toluene. The changes in the ratios of unsaturated to saturated fatty acids were insignificant between cells grown with and without toluene. The changes...

Journal: :Water research 2004
M C Tom Kuo K F Liang Y L Han K C Fan

In-situ pilot studies of aerobic cometabolism were conducted to evaluate the injection of toluene-vapor and air into TCE-contaminated aquifer. Delivery of primary substrate (toluene) in a vapor state with air enhanced the growth of indigenous toluene-utilizing bacteria that would degrade TCE by aerobic cometabolism. Meanwhile, delivering toluene in a vapor state effectively reduced potential cl...

Moch Sahri Noeroel Widajati,

Background: Toluene is a harmful substance still being used as a solvent and catalyst in many industries that can increase the level of urinary hippuric acid (UHA). This study was designed to examine the level of toluene and UHA among workers of industrial site in seven companies in Sidoarjo, Indonesia and to analyze the risk factors for abnormal UHA. Methods: This study was an analytical cross...

2017
Ronald Bartzatt

Aims: To synthesize small molecule alkylating compounds and analyze the kinetics of the alkylation in aqueous solution. Determine molecular properties and the drug likeness of these four compounds as potential antineoplastic agents and apply statistical analysis to identify interrelationships of properties. Study Design: Four compounds were synthesized, characterized, and studied for alkylation...

Journal: :international journal of occupational hygiene 0
zahra naghavi-konjin department of occupational health, school of public health, alborz university of medical sciences, karaj, iran. mansour rezazadeh-azari department of occupational health, school of public health, shahid beheshti university of medical sciences, tehran, iran. yaser shekoohi department of occupational health, school of public health, alborz university of medical sciences, karaj, iran. mitra rahimzadeh research center of social health determinant, alborz medical university, karaj, iran. mirdavoud seyedi national iranian oil production and distribution company – hse department.

exposure to toluene can be associate with genotoxicity, neurological dysfunction, reproductive toxicity, and etc. biomonitoring of hippuric acid (ha) is used for a long time as an occupational exposure index to toluene. the aim of this study was to explore efficiency of ha as a biomarker of exposure to low level of toluene for iranian petroleum depot workers in 2011. personal monitoring to tolu...

Fooladi, Mahta , Golbabaei, Farideh , Jozi, Seyed Ali , Moogouei, Roxana , Tajadod, Golnaz ,

Introduction: Phytoremediation is one of the available techniques for removing the volatile organic compound from the air. Benzene and toluene are volatile organic compounds that exist in many occupational environments. Plants are able to reduce benzene and toluene in the air and the use of plants is a simple and consistent solution for the nature to reduce these compositions in the air and imp...

Journal: :Organic & biomolecular chemistry 2009
Dhevalapally B Ramachary Chintalapudi Venkaiah Y Vijayendar Reddy Mamillapalli Kishor

In this paper we describe new multi-catalysis cascade (MCC) reactions for the one-pot synthesis of highly functionalized non-symmetrical malonates. These metal-free reactions are either five-step (olefination/hydrogenation/alkylation/ketenization/esterification) or six-step (olefination/hydrogenation/alkylation/ketenization/esterification/alkylation), and employ aldehydes/ketones, Meldrum's aci...

Journal: :Applied and environmental microbiology 1999
C Hubert Y Shen G Voordouw

Toluene-degrading bacteria were isolated from hydrocarbon-contaminated soil by incubating liquid enrichment cultures and agar plate cultures in desiccators in which the vapor pressure of toluene was controlled by dilution with vacuum pump oil. Incubation in desiccators equilibrated with either 100, 10, or 1% (wt/wt) toluene in vacuum pump oil and testing for genomic cross-hybridization resulted...

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