نتایج جستجو برای: pm25 concentrations

تعداد نتایج: 306827  

Journal: :Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 2000

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه پلیمر و پتروشیمی ایران - پژوهشکده پتروشیمی 1389

this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

شهر تهران به‌عنوان بزرگ‌ترین شهر ایران در زمره آلوده‌ترین شهرهای جهان به‌حساب می‌آید بنابراین ضرورت شناخت دقیق آلاینده‌ها و مشخص ساختن پهنه‌های آلوده به‌منظور کاستن از شدت آن‌ها آشکار است. هدف این پژوهش تهیه نقشه آلودگی هوای تهران و مشخص کردن مناطقی دارای بیش‌ترین آلودگی است. برای بررسی وضعیت آلودگی هوای شهر تهران پس از جمع‌آوری غلظت 5 آلاینده جوی (CO، NOx، SOx، O3، PM25) از 20 ایستگاه ثبت‌کنند...

Journal: :Gastroenterology 1980

Journal: :Papers in Regional Science 2008

Journal: :international journal of environmental research 0
j. grzechulska – damszel institute of chemical and environment engineering, west pomeranian university of technology, puaskiego 10, 70-322 szczecin, poland m. grześkowiak institute of chemical and environment engineering, west pomeranian university of technology, puaskiego 10, 70-322 szczecin, poland j. przepiórski institute of chemical and environment engineering, west pomeranian university of technology, puaskiego 10, 70-322 szczecin, poland a.w. morawski institute of chemical and environment engineering, west pomeranian university of technology, puaskiego 10, 70-322 szczecin, poland

the photocatalytic decomposition of trichloroethylene (tce) and tetrachloroethylene (pce)in water was studied. tce and pce were present in water at very low concentrations of about 15 μg/dm3. thisconcentration level corresponds to the one occasionally occurring in groundwater. results of this researchconfirmed usefulness of the photocatalytic process for successful removal of low-concentrated t...

Journal: :international journal of environmental research 2012
e.m.m. zahran

the aim of this research paper is the introduction of a novel mathematical approach to improvethe accuracy of the results of air pollution dispersion models based on the calibration of input backgroundconcentrations. using the dunkirk area of the city of nottingham in the uk as a case study, an air pollutionmodel in adms-roads was created for developing the mathematical approach. the iterative ...

Journal: :international journal of environmental research 0
e.m.m. zahran department of public works, faculty of engineering, ain shams university, cairo, egypt

the aim of this research paper is the introduction of a novel mathematical approach to improvethe accuracy of the results of air pollution dispersion models based on the calibration of input backgroundconcentrations. using the dunkirk area of the city of nottingham in the uk as a case study, an air pollutionmodel in adms-roads was created for developing the mathematical approach. the iterative ...

Journal: :basic and clinical neuroscience 0
solomon umukoro department of pharmacology and therapeutics, university of ibadan, oyo state, nigeria. adaeze ugbomah department of pharmacology and therapeutics, university of ibadan, oyo state, nigeria. adegbuyi o. aderibigbe department of pharmacology and therapeutics, university of ibadan, oyo state, nigeria. anothony t. eduviere department of pharmacology and therapeutics, university of ibadan, oyo state, nigeria. adrian i. omogbiya department of pharmacology and therapeutics, university of ibadan, oyo state, nigeria.

introduction: amnesia or loss of memory is the cardinal hallmark of alzheimer’s disease (ad), a progressive neurodegenerative disorder associated with ageing process. although, ad had been discovered over a century ago, drugs which could cure or halt the progression of the disease are yet to see the light of the day. however, there has been a growing interest in the use of phytomedicines with m...

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