نتایج جستجو برای: airborne

تعداد نتایج: 22242  

Journal: :international journal of occupational hygiene 0
milad derakhshan jazari msc of occupational health engineering, tehran university of medical sciences, tehran, iran mahdyeh boubehrejh national center of air and climate change, department of the environment, tehran, iran maryam avishan national center of air and climate change, department of the environment, tehran, iran jamshid gholampour [email protected] mohammad reza monazzam esmail pour professor of occupational health engineering, tehran university of medical sciences, tehran, iran mohsen meshkani [email protected]

original article   introduction: wind-turbine noise emission and its environmental impact are considerable issues nowadays. considering the importance of the issue, the purpose of this study was to prepare noise map and wind turbines sound characteristics on the largest wind farm of iran. method: this study was carried out in two phases:1) in order to prepare the daytime sound level (ld) noise ...

Journal: :international journal of environmental research 0

air pollutants from iron and steel making operations have historically been an environmental concern. the factory located at ahwaz, iran, has two production lines namely, 630 and 650, which produce iron parallel edge. the objective of the study is to determine indoor respiratory particulate matter (rpm) and feo concentrations and their comparison with niosh standards. this is a cross–sectiona...

Journal: :international journal of environmental research 2013
a.a. espinosa j. miranda

soil samples were collected from seven sites in and around the metropolitan area of mexicocity. the locations were chosen as possible sources of fugitive dusts which contribute to suspended particulate matter in the atmosphere of mexico city. x-ray fluorescence (xrf) was used to determine the concentrations of several major elements (si, k, ca, ti, mn, and fe), as well as of other trace element...

Journal: :international journal of occupational hygiene 0
shahnaz bakand department of occupational health, school of public health, iran university of medical sciences. amanda hayes chemical safety and applied toxicology (csat) laboratories, school of risk and safety sciences, the chris winder chemical safety and applied toxicology (csat) laboratories, school of risk and safety sciences, the university of new south wales, unsw sydney, 2052

while the oecd test guidelines and mostly animal assays have been used to study the toxic effects of chemicals for many years, very little is known about the potential toxicity of vast majority of inhaled chemicals. considering large number of chemicals and complex mixtures present in indoor and outdoor air, heavy reliance on animal test methods appear to be not adequate. continuing scientific ...

Seyed Morteza Talebi

Polycyclic aromatic hydrocarbons (PAHS) have been determined in the atmosphere of Isfahan, Iran. Airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). Extraction of PAHS from airborne particulate matter has been performed using SFE system and the relationship between the extraction temperature and the recovery of PAHS</su...

ژورنال: سلامت و محیط زیست 2009
جباری, حسین, رضایی, سهیلا, نبی زاده, رامین, ندافی, کاظم, یونسیان, مسعود,

Background and Objectives: Atmospheric transport is a key mode of microbial dispersal and the transmission of airborne microbe can have significant impacts on human health. The main objective of this study was to determine the concentrations of airborne bacteria in a children.s hospital.Materials and methods: Three sampling points were selected. Airborne bacteria were collected with 6 days inte...

ژورنال: سلامت کار ایران 2017

Background and aims: The current conventional effective elements on transporting or reducing of airborne aerosols and building indoor air quality are natural ventilation systems. Natural ventilation is supplying fresh air and cooling down by replacing ambient air which is one of the effective parameter on social hygiene and health aspect through controlling airborne pathogens and their relate...

A. Vaghefikia B. Sabayan G. Shekarkhar Keyvan Pakshir, S. Mostagnie

Hospitalized patients have a potential risk for nosocomial infections. Airborne fungi are one of the main causes of fungal infections in this group. The objective of this study was to investigate the concentrations and species of airborne fungi in two general hospitals in Shiraz, southern Iran. Air samples were collected from high-risk wards, using settle plate method. Fungal colonies were iden...

Journal: :international journal of environmental research 0
a.a. espinosa instituto de fisica, universidad nacional autonoma de mexico, apartado postal 20-364, 01000 mexico, d.f., mexico j. miranda instituto de fisica, universidad nacional autonoma de mexico, apartado postal 20-364, 01000 mexico, d.f., mexico

soil samples were collected from seven sites in and around the metropolitan area of mexicocity. the locations were chosen as possible sources of fugitive dusts which contribute to suspended particulate matter in the atmosphere of mexico city. x-ray fluorescence (xrf) was used to determine the concentrations of several major elements (si, k, ca, ti, mn, and fe), as well as of other trace element...

Journal: :iranian journal of science and technology (sciences) 2013
f. rezanejad

the study aimed to investigate the microsporogenesis, tapetum and pollen development in petunia hybrida juss.under control and air pollution condition. the connective shows a well-developed placentoid, giving thesporogenous tissue a crescent-shape. the sporogenous tissue of each of the four anther locules is surrounded bydimorphic tapetum. the outer (towards the epidermis) and inner (towards th...

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