نتایج جستجو برای: nitrogen dioxide and carbon monoxide p

تعداد نتایج: 17081086  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
vahidah homaunmir sayed hossein tohidi garnik grigoryan,

one distinct concentration of copper ions was embedded into the silica matrix to xerogel form using copper source cu(no3)2∙3h2o. the xerogel samples were prepared with using hydrolysis and condensation reactions of tetraethyl ortho-silicate (teos) by the sol-gel method. in this investigation, new molar ratio of h2o/teos was determined to be 11.7. also, the necessary amount of tri-hydrated coppe...

Journal: :international journal of occupational hygiene 0
farideh golbabaei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. hamid hassani department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. asghar ghahri department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. seyedsomeah mirghani department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. safora arefian department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. monireh khadem department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran.

exposure to welding gases can cause health adverse effects. risk assessment is a useful tool for good assessment of exposed workers. the purpose of this study was to determine the risk levels for exposed welders to welding gases. welders (n=239) were selected from iranian natural gas transmission pipelines industry from four regions in iran including assaluyeh, omidieh, loshan, and borujen. ozo...

2016
Marko Förstel Pavlo Maksyutenko Alexander M. Mebel Ralf I. Kaiser

Carbon monoxide is the second most abundant molecule on icy grains in the interstellar medium. These grains are under the influence of ionizing radiation, which induces the chemical reaction within the ice. Here we report the first observation of subliming pentacarbon dioxide (C5O2) after irradiation of pure carbon monoxide ice with energetic electrons. Our results show that pentacarbon dioxide...

2011
S. Straus

Fortisan, cellulose triacetate, and NOroxidized cellulose were pyrolyzed in a vacuum in the temperature range 1800 to 465 0 C. Cotton cellulose and cellulose t ri acetate were also pyrolyzed in nitrogen at atmospheric pressure. The tar yields were in the decreasing order from: Cotton, Fortisan, cellulose triacetate, and oxidized cellulose. The other volatiles consisted mainly of acetic acid, ca...

Garnik Grigoryan, Sayed Hossein Tohidi, Vahidah Homaunmir

One distinct concentration of copper ions was embedded into the silica matrix to xerogel form using copper source Cu(NO3)2∙3H2O. The xerogel samples were prepared with using hydrolysis and condensation reactions of TetraEthyl Ortho-Silicate (TEOS) by the sol-gel method. In this investigation, new molar ratio of H2</su...

2017
Dario Zappa Angela Bertuna Elisabetta Comini Navpreet Kaur Nicola Poli Veronica Sberveglieri Giorgio Sberveglieri

Preparation and characterization of different metal oxide (NiO, WO3, ZnO, SnO2 and Nb2O5) nanostructures for chemical sensing are presented. p-Type (NiO) and n-type (WO3, SnO2, ZnO and Nb2O5) metal oxide nanostructures were grown on alumina substrates using evaporation-condensation, thermal oxidation and hydrothermal techniques. Surface morphologies and crystal structures were investigated thro...

Journal: :Environmental Health Perspectives 1999
Y L Guo Y C Lin F C Sung S L Huang Y C Ko J S Lai H J Su C K Shaw R S Lin D W Dockery

This study compared the prevalence of asthma with climate and air pollutant data to determine the relationship between asthma prevalence and these factors. We conducted a nationwide survey of respiratory illness and symptoms in middle-school students in Taiwan. Lifetime prevalences of physician-diagnosed asthma and of typical symptoms of asthma were compared to air monitoring station data for t...

ژورنال: طلوع بهداشت یزد 2012
عتابی, فریده, پاشایی فر, محمد رضا , کرمی, محمدامین, کریمایی, مصطفی,

Background: Health hazards resulting from contact with air pollutants in indoor environment is relatively far more than those of the outdoor. This indicates the importance of indoor air pollution and its impressive role on people health. Method: For determination of indoor air quality, different types of pollutants and their interactions, the type of fuel used, ventilation condition and amou...

اسماعیل نسب, نادر, روشنایی, قدرت اله, شریفی, سارا, فرسان, حسین, کرمی, منوچهر,

Background and Objectives: Cardiac diseases are a major cause of death in Iran. The number of deaths from cardiac diseases can be reduced through controlling air pollution. The aim of this study was to determine the relationship between increased air pollution and mortality from respiratory and cardiac diseases in Tehran. Methods: The average daily concentrations of five pollutants, includin...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید