نتایج جستجو برای: cymene xylene

تعداد نتایج: 3670  

Journal: :Journal of Organometallic Chemistry 2007

Khosrovam, Merji, Vosooghi Rahbari, Zahra,

The synthesized zeolites of EU-1 and mordenite were modified via dealumination process with Nitric acid and changes of their properties including surface area, diameter, pore volume and Si/Al ratio were investigated. The catalytic performance of these two zeolites was tested and compared together in xylene isomerization process at a fixed bed reactor. The results showed that due to modification...

Journal: :Turkish journal of medical sciences 2017
Aysun Özkan Ayşe Erdoğan

BACKGROUND/AIM In this study, we evaluated Thymus revolutus Célak essential oil and its two main constituents, γ-terpinene and p-cymene, as potential oxidative agents against lung cancer and epidermoid carcinoma cells. MATERIALS AND METHODS Cell viability assessment was made by CellTiter-Blue1397904493 cell viability and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay...

Journal: :Journal of bacteriology 1999
C J Krieger H R Beller M Reinhard A M Spormann

The initial enzymatic steps in anaerobic m-xylene oxidation were studied in Azoarcus sp. strain T, a denitrifying bacterium capable of mineralizing m-xylene via 3-methylbenzoate. Permeabilized cells of m-xylene-grown Azoarcus sp. strain T catalyzed the addition of m-xylene to fumarate to form (3-methylbenzyl)succinate. In the presence of succinyl coenzyme A (CoA) and nitrate, (3-methylbenzyl)su...

Journal: :Collegium antropologicum 2001
R M Liscić L Skender J Jakić-Razumović D Simić S Milković-Kraus

The effects of chronic exposure to xylene on cognitive ability were studied in a group of 35 medical workers occupationally exposed to low-level concentrations of xylene for at least five years by using event-related potentials (ERPs), and compared with a control group of 21 subjects. The exposure to xylene was confirmed through determination of m-methylhippuric acid, a reliable biological indi...

2013
Mohammad G.T. Kazem

Capsicum and garlic were extracted in xylene. The obtained extracts were used to prepare four emulsifable concentrates "EC's". Formula A "capsicum xylene extract + emulsifier", Formula B "garlic xylene extract + emulsifier", Formula C "capsicum xylene extract in boiled linseed oil + emulsifier" and Formula D "garlic xylene extract in boiled linseed oil + emulsifier ". All prepared formulations ...

Journal: :Applied and environmental microbiology 2002
F X Prenafeta-Boldú J Vervoort J T C Grotenhuis J W Van Groenestijn

The soil fungus Cladophialophora sp. strain T1 (= ATCC MYA-2335) was capable of growth on a model water-soluble fraction of gasoline that contained all six BTEX components (benzene, toluene, ethylbenzene, and the xylene isomers). Benzene was not metabolized, but the alkylated benzenes (toluene, ethylbenzene, and xylenes) were degraded by a combination of assimilation and cometabolism. Toluene a...

2006
S. Al-Khattaf

m-Xylene transformation has been studied on as-prepared H-Y and a series of dealuminated Y zeolite catalysts. The conversion of m-xylene was found to increase initially with acidity, however, decreases subsequently. It has been proposed that the high concentration of acid sites in the H-Y catalyst increases paring reaction, in addition to the well-known isomerization and disproportionation path...

Journal: :Environmental science & technology 2005
Chen Song Kwangsam Na David R Cocker

A series of m-xylene/NOx experiments were conducted in the new Bourns College of Engineering-Center for Environmental Research and Technology dual 90 m3 indoor smog chamber to elucidate the role of NOx on the secondary organic aerosol (SOA) formation potential of m-xylene. The results presented herein demonstrate a clear dependence of m-xylene SOA formation potential on NOx, particularly at atm...

Journal: :Applied and environmental microbiology 2007
Sara A Burt Ruurd van der Zee Ad P Koets Anko M de Graaff Frans van Knapen Wim Gaastra Henk P Haagsman Edwin J A Veldhuizen

The essential oils of oregano and thyme are active against a number of food-borne pathogens, such as Escherichia coli O157:H7. Carvacrol is one of the major antibacterial components of these oils, and p-cymene is thought to be its precursor in the plant. The effects of carvacrol and p-cymene on protein synthesis in E. coli O157:H7 ATCC 43895 cells were investigated. Bacteria were grown overnigh...

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