نتایج جستجو برای: benzene family
تعداد نتایج: 439577 فیلتر نتایج به سال:
We present the characterisation of a hydrogel forming family of benzene 1,3,5-tricarboxamide (BTA) aromatic carboxylic acid derivatives. The simple, easy to synthesise compounds presented here exhibit consistent gel formation at low concentrations through the use of a pH trigger.
در این کار پژوهشی بیشتر سنتز ترکیبهای مختلف سه حلقه ای فنل با یک نوع هالوژن و هالوژنهای مختلف روی حلقه موردنظر است و مشتقهای مختلف از این نوع ترکیبها که در زیر شرح داده شده است سنتز گردیده است . علاوه براین از روشهای سنتزی برای تائید ساختمان ترکیبهای سه حلقه ای استفاده شده است . سنتز این ترکیبها امکان میدهد که خواص شیمیائی و بیولوژیکی آنها با ترکیبهای مشابه دوحلقه ای و چهارحلقه ای از این نوع مق...
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...
جهت شناسایی و بررسی بیوسیستماتیکی فون جوندگان شهرستان های جیرفت و عنبرآباد از شهریور 1391 تا شهریور 1392 در مناطق مختلف اعم از مناطق پست و هموار و کوهستانی با استفاده از تله های زنده گیر و مرده گیر نمونه برداری انجام شد و تعداد 62 نمونه از 10 گونه و 3 خانواده شامل: family muridae, golunda ellioti, acomys dimidiatus, tatera indica, merines persicus, mus musculus, nesokia indica, rattus rattus, ...
tire manufacturing industry has a history of more than half a century in iran, where 14 thousand workers are employed. the old and semi-automated processes equipment, backward technology, and raw materials impurity lead to significant exposures to occupational carcinogens such as benzene. this study was to assessment of benzene exposures and evaluation the resulting cancer risk in two tire-manu...
The current study aimed to examine the overall feasibility of the use of copper oxide nanoparticles (CuO-NPs) as a catalyst in ozonation process for the removal of benzene from aqueous solutions under experimental conditions. This experimental study was conducted on a laboratory scale reactor in a semi-batch mode. The effect of critical operating parameters such factors as pH, concentration of ...
Abstract Background: To establish a method for determination of in-cabin benzene and evaluate the occupational exposure, a cross-sectional study was conducted. Methods: In this descriptive study, 30 taxi-cabs were selected and the concentrations of benzene was measured in stopping and driving conditions using solid phase microinstruction (SPME) method. Results: The overall average conc...
The title compound, C(26)H(20)N(2)O, belongs to a new family of organic two-photon absorption materials with triphenyl-amine and pyridine units. In the mol-ecule, the three benzene rings are arranged in a propeller-like fashion; the dihedral angles between the rings are 80.01 (14), 75.68 (13) and 56.93 (14)°. The pyridine ring is oriented at dihedral angles of 56.24 (14), 48.92 (15) and 22.02 (...
background: nanotechnology is a new approach that has been lionized in recent years. one of its applications is its consumption as an absorbent. in this study, the single-wall carbon nanotubes (swcnts) were used as an absorbent for sampling benzene in the air. materials and methods: for this study, swcnts manufactured by iran and skc’s activated charcoal were used for sampling benzene vapors. p...
background: volatile organic compounds (vocs) are among the main air pollutants which have destructive effects on the environment and human health. considering the carcinogenic effects of some of these compounds including benzene, how to control and limit them is considered an important issue in environmental research. the aim of this study was to evaluate the use of the combined ultraviolet (u...
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