نتایج جستجو برای: in chemical industry
تعداد نتایج: 17072764 فیلتر نتایج به سال:
abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
Background & Aims of the Study: Petrochemical industry is an important industry in the economic development of the country that causes employees have exposure with several kinds of contamination. The aim of this study was Semi-quantitative assessment of the health risk of occupational exposure to chemical materials and investigation of spirometry in...
cml in breif cml is characterized by the proliferation of large numbers of immature wbc in the blood and bone marrow. in most of the patients , it is a clonal disorder in which all cell lines, express the philadelphia chromosome)q/22 translocation(it accounts for 20 of all leukemias and most cases occur over 25 yrs of age. the disease usually begins insidiously,but symptoms referable to anemia ...
it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...
System defects and policy-related exclusion in the development and utilization of energy resources bring the problem of rich poverty to energy and chemical industry base in Northern Shaanxi. The long existence of the rich poverty problem of energy and chemical industry base in Northern Shaanxi forms deep-seated constraints to the sustainable development of energy economy in Northern Shaanxi and...
In June 2015, a discussion meeting entitled ‘Catalysis improving society’ was held based around the research initiatives of the recently established UK Catalysis Hub. The title is very bold for a discussion meeting, and this is indeed true. However, it is hard to imagine the world today or indeed civilized society without the impact of catalysis on the fundamental aspects required for life, nam...
INTRODUCTION This paper examines a number of US chemical industry incidents and their effect on equity prices of the incident company. Furthermore, this paper then examines the contagion effect of this incident on direct competitors. METHOD Event study methodology is used to assess the impact of chemical incidents on both incident and competitor companies. RESULTS This paper finds that the ...
Faujasite (X, Y, and USY) zeolites represent one of the most widely-applied and abundant catalysts and sorbents in the chemical industry. In the last 5 years substantial progress was made in the synthesis, characterisation, and catalytic exploitation of hierarchically-structured variants of these zeolites. Hererin, we provide an overview of these contributions, highlighting the main advancement...
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