نتایج جستجو برای: air contaminates
تعداد نتایج: 206109 فیلتر نتایج به سال:
the importance of the use of activated charcoal tubes for sampling gases and vapors is very well-known. for producing these tubes in the country, their production started in the laboratory of the department of occupation al health using activated charcoal, polyurethane foam and glass wool and consequently two types of foamed and foamless tubes were produced. to investigate the quality of the ra...
Environmental tobacco smoke (ETS) contaminates indoor air in homes and workplaces. Although the adverse effects of active cigarette smoking on the respiratory tract have been extensively characterized, the effects of ETS exposure on adult asthma have not yet been investigated extensively and the available data are limited. This article examines the evidence for ETS exposure as a cause of asthma...
Utilization of metalworking fluids in the technological process of metalworking brings its advantages and disadvantages, mainly associated with the contamination of the working air through cutting fluid mist. The primary aim of this article is to approximate the mechanism of aerosols generation which contaminates the working air and to draw the attention to the problem of quantification of gene...
the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...
In today's time, our nature is fighting against many life-threatening problems which can even threaten the existence of life on Earth. Pollution one deadliest among them. It caused primarily by means air, water and land but air pollution most severe dreadful introduction toxic substances like oxides Sulphur, nitrogen carbon into atmosphere making it unfit for living beings. Along with humans, p...
Indirect evidence suggests that the contents of visual working memory may be maintained within sensory areas early in the visual hierarchy. We tested this possibility using a well-studied motion repulsion phenomenon in which perception of one direction of motion is distorted when another direction of motion is viewed simultaneously. We found that observers misperceived the actual direction of m...
Oil is the most widely distributed source of energy in the world and the largest-scaled environmental pollutant. Oil, oil products, and oil-containing industrial wastes pollution is ranked second place after radioactive pollution on account of their harmful action to ecosystems (Chernyakhovsky et al., 2004). Oil deposits in Russia are mainly located in the northern regions of the European part ...
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