نتایج جستجو برای: benzene family
تعداد نتایج: 439577 فیلتر نتایج به سال:
Introduction & Objective: Benzene is one of the most common volatile organic compounds in the indoor and outdoor environments that has always been considered as one of the causes of air pollution. Thus before being discharged to the environment, it must be treated from pol-luted air stream. The aim of this study was to determine the efficiency of catalytic ozonation process with carbosieve in...
vanadium supported on highly ordered nanoporous silica (vox-lus-1) was synthesized and characterized by xrd, nitrogen adsorption‑desorption isotherms and uv-visible spectrophotometer. direct oxidation of benzene to phenol in liquid phase by h2o2 peroxide were examined by using various solvents (methanol, acetone, acetic acid, acetonitryl). the maximum yield (25%) and selectivity (73%) of the ph...
A family of carbon-embedded copper catalysts was synthesized by pyrolyzing benzene-1,3,5-tricarboxylate (Cu-BTC) at various temperatures ranging from 400 to 900 °C. Characterization demonstrated that the density defect sites on carbon support increases with an increase in pyrolysis temperature leading electron sites. Catalytic performance tests 1,3-butadiene hydrogenation showed becomes more st...
Aqueous, light petroleum, chloroform, alcohol, benzene and acetone extracts of the leaves of Coccinia indica. (Family: Cucurbitaceae) were screened for antihepatotoxic activity. The extracts were given after the liver was damaged with Ccl4 Liver function was assessed based on liver to body weight ratio pentobarbitone sleep time, serum levels of transaminase (SGPT, SGOT), alkaline phosphatase (S...
The title compound, [Mn(C(18)H(12)N(4)O(2))(C(4)H(6)N(2))(2)], belongs to the family of 1,2-bis-(pyridine-2-carboxamido)benzene (H(2)bpb) ligated metal complexes. The manganese center is octa-hedrally coordinated by a bpb ligand and two axial 1-methyl-imidazole mol-ecules. The axial N-Mn-N group is bent with a bond angle of 151.79 (7)°.
A family of isostructural, chiral supramolecular networks have been obtained in the solid state by exploiting second sphere coordination interactions in the self-assembly of achiral tris amines and with tetrahalometallate and halide ions. Quantum-Mechanical (QM) calculations specific for solid phases provided additional insights into the intramolecular and packing interactions which determine c...
Methods: Among 346 collected samples, benzene was identified in all cases (100%) and epichlorohydrin in 156 samples (45%). A significant difference was found in the mean of exposure to benzene and epichlorohydrin in various workshops (Pvalue <0.05). Occupational exposure to benzene in machiner with 1.68 ppm and patrol officers with 0.018 ppm were the highest and lowest values, respectively...
Background & Objectives : Exposure to different chemical compounds such as toluene and ethyl benzene occurs in workplaces, residency, and urban areas. Currently, vehicle cabin environment is one of the new exposure sources of passengers to these compounds. This study aimed to evaluate the effects of in-cabin decoration and deodorizer use on interior concentrations of toluene and ethyl be...
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