نتایج جستجو برای: pm10 5000 170 00466 20 00041 000264 site personnel co 0023 2360 06470 277 281

تعداد نتایج: 1305325  

2017
Seyed Ali Sajjadi Ghasem Zolfaghari Hamed Adab Ahmad Allahabadi Mehri Delsouz

This paper presented the levels of PM2.5 and PM10 in different stations at the city of Sabzevar, Iran. Furthermore, this study was an attempt to evaluate spatial interpolation methods for determining the PM2.5 and PM10 concentrations in the city of Sabzevar. Particulate matters were measured by Haz-Dust EPAM at 48 stations. Then, four interpolating models, including Radial Basis Functions (RBF)...

2004
Yele Sun Guoshun Zhuang Ying Wang Lihui Han Jinghua Guo Mo Dan Wenjie Zhang Zifa Wang Zhengping Hao

Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aero...

2002

Under 5 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283 8.1 5 to 9 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 7.9 10 to 14 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 8.3 15 to 19 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283 8.1 20 to 24 years . . . . . . . . . . . . . . . . . . . . ....

Journal: :Epidemiology 2000
B Ritz F Yu G Chapa S Fruin

We evaluated the effect of air pollution exposure during pregnancy on the occurrence of preterm birth in a cohort of 97,518 neonates born in Southern California. We used measurements of carbon monoxide (CO), nitrogen dioxide, ozone, and particulate matter less than 10 microm (PM10) collected at 17 air-quality-monitoring stations to create average exposure estimates for periods of pregnancy. We ...

Journal: :Journal of environmental sciences 2007
Ren-Jian Zhang Jun-Ji Cao Shun-Cheng Lee Zhen-Xing Shen Kin-Fai Ho

An intensive observation of organic carbon (OC) and elemental carbon (EC) in PM10 and gaseous materials (SO2, CO, and O3) was conducted continuously to assess the characteristics of wintertime carbonaceous aerosols in an urban area of Beijing, China. Results showed that the averaged total carbon (TC) and PM10 concentrations in observation period are 30.2 +/- 120.4 and 172.6 +/- 198.3 microg/m3,...

2006
Jennifer B. McClure Gary E. Swan

Nicotine replacement therapy (NRT) is an effective treatment for smoking Abstract cessation, but as with all such pharmacotherapies, the majority of smokers who use NRT products do not stop smoking or remain abstinent long term. Treatment outcome is affected by a range of individual-specific factors, as well as the pharmacokinetic profile of each NRT formulation. This has led to speculation tha...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی 1392

این تحقیق به منظور تخمین شرایط حاد آلودگی هوای شهر تهران ناشی از غلظت ازن و وذرات معلق کمتراز10میکرون (pm10) و ارتباط آن با پارامترهای هوا شناسی با استفاده از شبکه عصبی مصنوعی و داده‎ های مربوط به سال 1389 و 1390 انجام شد. موثر ترین متغیرهای هواشناسی با استفاده از رگرسیون گام به گام انتخاب شدند. سپس شرایط حاد آلودگی هوا با استفاده از شبکه عصبی مصنوعی، تابع انتقال سیگموئید و تانژانت هیپربولیک تخ...

Journal: :Remote Sensing 2010
Adelaide Dinoi Maria Rita Perrone Pasquale Burlizzi

Aerosol optical thicknesses (AOTs) by the MODerate Resolution Imaging Spetroradiometer (MODIS) on-board Aqua and Terra satellites, and ground-based measurements of PM10 mass concentrations, collected over three years (2006–2008) at two suburban sites which are 20 km apart, are correlated to assess the use of satellite data for regional air quality studies over Southeastern Italy, in the central...

2012
Ashwin Sabapathy Santhosh Ragavan Sumeet Saksena

This study investigated 2-wheeler exposures to CO and PM10 along six standardized arterial main road stretches in Bangalore city in India during morning peak (9:00-11:00) and afternoon non-peak hours (13:00-15:00) using personal samplers. Background levels on a local street carrying no traffic and away from main roads were also monitored to determine the actual contributions of vehicular traffi...

Introduction: The aim of this study was to spatial analysis of PM10 concentrations in the ambient air of Yazd in two seasons, and the zoning by using Kriging interpolation method. Finally, different factors affecting the concentrations of PM10 are marked and standards have been investigated Material and methods: The measurement of PM10 particulates was performed by the monitoring device HAZ-...

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