نتایج جستجو برای: air borne disease
تعداد نتایج: 1702659 فیلتر نتایج به سال:
background : health professionals face the adverse health effects of climate change and air pollution in their practices. this review underscores the effects of these environmental factors on maternal and children’s health, as the most vulnerable groups to climate change and air pollution. methods : we reviewed electronic databases for a search of the literature to find relevant studies publish...
PURPOSE OF REVIEW To present the latest data that demonstrate how climate change affects children's health and to identify the principal ways in which climate change puts children's health at risk. RECENT FINDINGS Data continue to emerge that further implicate climate change as contributing to health burdens in children. Climate models have become even more sophisticated and consistently fore...
The common house spider, Achaearanea tepidariorum, has a sensitive vibration receptor in each of its eight legs. The receptor has been shown to respond to air-borne sound as well as to direct vibration (Walcott & Van der Kloot, 1959). But for a spider on its web a more usual source of information about the outside world comes from vibrations of the web strands themselves. What is the response o...
Laser Range Finder (LRF) is a most commonly used sensor for non-contact distance measurement and its applications cover wide areas of civil and defense. This paper discusses the design of Time of Flight (TOF) based single channel pulsed LRF, in which single optical channel has been used for transmitting and receiving of laser pulse with the day sighting capability. It offers considerable size r...
1. Pulmonary tuberculosis in unselected rabbits, induced by primary quantitative air-borne infection with human type tubercle bacilli, may retrogress or progress. Some animals whose disease was in a stationary condition might have fallen into one of the above groups had the experiments been prolonged. 2. Within the limits of the observations natural resistance or susceptibility appears to be th...
In the study of the bactericidal action of ultraviolet radiation on air-borne organisms, it is difficult to determine the number of bacteria per unit volume floating in the air and to measure the lethal radiation to which the organisms were exposed. In studying this action, Fair and Wells (1935) atomized a water suspension of Escherichia coli into a room and measured the normal rate at which th...
In the course of investigations on the effect of chemical vapors on air-borne bacteria, a better understanding of the state of the air-borne organism was sought through studies on the nature and composition of certain experimental bacterial aerosols. It was felt that an appreciation of the physical characteristics of the air-borne particle would add to our understanding of the factors which det...
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...
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