نتایج جستجو برای: Ambient air

تعداد نتایج: 245692  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

ژورنال: سلامت و محیط زیست 2013
جباری, حسین, جمشیدی, ارسلان, رایگان شیرازی نژاد, علیرضا, رضایی, سهیلا, سادات, عبدالمحمد, ندافی, کاظم, یونسیان, مسعود,

Background and Objectives: In recent years exposure to fine airborne particles has been identified as an important factor affecting human health. Epidemiological studies have showed that the aerosol laden air can be an agent for microorganisms’ dispersion. Ignoring internal sources, ambient air quality significantly affects indoor air quality. Since people spend most of their times in the indoo...

Journal: :international journal of environmental research 0

the main objective of a research program, whose output is presented here, has been to estimate “ventilation coefficients”, a critical parameter in determining air pollution concentration near the surface ground which signifies the ability for natural ventilation of an air shed in an urban or rural area. relevant measured data from the city of tehran has been used to calibrate and further de...

Journal: :journal of research in health sciences 0
abdorahman bahrami hosein mahjub mohammad javad assari

background: the incomplete burning of fuel in engine of vehicles, evaporation of petrol from gas stations, and also car carburetor cause unburned hydrocarbons to be emitted in ambient air of cities and gas station locations. from unburned hydrocarbons; monocyclic aromatic hydrocarbon influence to citizen's health and benzene is known as carcinogenic compounds. the objectives of this study are t...

Journal: :journal of research in medical sciences 0
mohsen janghorbani elaheh piraei

background: although several studies have investigated the association between maternal exposure to air pollution and preterm birth, the results are inconsistent. the aim of this study was to further investigate the relation between maternal exposure to ambient air pollution during pregnancy and the risk of preterm birth and low birth weight (lbw) in an iranian pregnant population. materials an...

Journal: :Journal of the Air Pollution Control Association 1962

Background: When workplace air monitoring is not sufficient to determine the exposure levels, the determination of compounds and some metabolites in exhaled air and personal exposure levels is considered a practical method for biological monitoring. The aim of this study was to determine the relationship between the concentration of tetrachlorethylene in exhaled air and personal exposure levels...

2015
Eduardo Olaguer David Sterling Jonathan Ward

Supplement Aims and Scope or limited or prevented to help protect human health and our environment. In a field where the literature is ever-expanding, practitioners and researchers increasingly need to have ready access to up-to-date, high-quality scholarly articles on areas of ongoing interest in environmental health. This supplement aims to address this need by presenting contemporary article...

Journal: :Environmental Health Insights 2015

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