نتایج جستجو برای: toluene alkylation

تعداد نتایج: 13620  

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
فریبا منصوری f mansouri قوام میرستاری gh mirsatari مسعود ریسمانچیان m rismanchian عبدالرحمن بهرامی ar bahrami نصرالله بشردوست n bashardoost اردشیر کلانتری a kalantari محمد مهدی امین

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...

Journal: :jundishapur journal of microbiology 0
afrouzossadat hosseini abari department of biology, faculty of science, university of isfahan, isfahan, ir iran giti emtiazi department of biology, faculty of science, university of isfahan, isfahan, ir iran; department of biology, faculty of science, university of isfahan, isfahan, ir iran. tel: +98-3117932457, fax: +98-3117932456 seyed mahdi ghasemi department of biology, faculty of science, university of isfahan, isfahan, ir iran rasoul roghanian department of biology, faculty of science, university of isfahan, isfahan, ir iran

background toluene is a cyclic aromatic hydrocarbon which is widely used as an industrial feedstock and as a solvent. it is one of the major parts of pollution in oil-contaminated environments. objectives the main aim of this study was to isolate and characterize a bacterium with high potential application in toluene bioremediation. materials and methods to isolate a toluene-degrading bacterium...

2016
Xiaoping Zhang Cong Liao

A fluidized bed reactor with ultraviolet lamp and TiO2/silica photo-catalyst prepared in our laboratory was used as a photo-reactor to degrade toluene in a simulated toluene-air mixture. The effects of operating parameters including initial toluene concentration, superficial gas velocity, ultraviolet light intensity and catalyst bed height on degradation rate of toluene have been investigated i...

Journal: :Chemical research in toxicology 2005
José A Manso M Teresa Pérez-Prior M del Pilar García-Santos Emilio Calle Julio Casado

The alkylating potential of beta-propiolactone (BPL), beta-butyrolactone (BBL), gamma-butyrolactone, and delta-valerolactone, which can be formed by the in vivo nitrosation of primary amino acids, was investigated kinetically. The nucleophile NBP, 4-(p-nitrobenzyl)pyridine, a trap for alkylating agents, was used as an alkylation substrate. The alkylation reactions were performed under mimicked ...

Journal: :Applied and environmental microbiology 1994
D Y Mu K M Scow

Toluene is one of several cosubstrates able to support the cometabolism of trichloroethylene (TCE) by soil microbial communities. Indigenous microbial populations in soil degraded TCE in the presence, but not the absence, of toluene after a 60- to 80-h lag period. Initial populations of toluene and TCE degraders ranged from 0.2 x 10(3) to 4 x 10(3) cells per g of soil and increased by more than...

Journal: :Journal of neuropathology and experimental neurology 2004
Christopher M Filley William Halliday B K Kleinschmidt-DeMasters

In recent decades the organic solvent toluene (methylbenzene) has emerged as one of the best-studied neurotoxins. Long-term and intense exposure to toluene vapors in humans who abuse spray paint and related substances has led to the recognition that toluene has a severe impact on central nervous system myelin. Chronic toluene abuse produces a devastating neurological disorder, of which dementia...

ژورنال: دانشور پزشکی 2008
اکبری, مهدی , خوانین, دکتر علی , فتح‌الهی, دکتر یعقوب , مرتضوی, دکتر سیدباقر , میرزایی, دکتر رمضان , کاظم‌نژاد, دکتر انوشیروان ,

  Introduction: In the present study, was performed to investigate the relationship between toluene(1000 ppm), noise, toluene and toluene along with noise (frequencies 250- 2000 Hz) per auditory Brain Stem response (ABR) on rabbits in which being exposed to this contaminants.   Materials & Methods: Three months old, male adult white New Zealand rabbits (1400-1700 g body weight) were used throug...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1958

2006
Vladimir Benin

The current article reports theoretical studies (DFT: B3LYP/6-31CG(d)) on the structure and alkylation reactions of the anions of some secondary N-nitrosocarbamates, a class of ambident nucleophiles whose chemistry has been little explored. Several anions (1–4), with an increasing size of the carbamate alkyl (aryl) group were investigated, in an attempt to establish the influence of the size of...

2018
Kazumitsu Onizuka Akira Usami Yudai Yamaoki Tomohito Kobayashi Madoka E Hazemi Tomoko Chikuni Norihiro Sato Kaname Sasaki Masato Katahira Fumi Nagatsugi

The alkylation of the specific higher-order nucleic acid structures is of great significance in order to control its function and gene expression. In this report, we have described the T-T mismatch selective alkylation with a vinyldiaminotriazine (VDAT)-acridine conjugate. The alkylation selectively proceeded at the N3 position of thymidine on the T-T mismatch. Interestingly, the alkylated thym...

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