نتایج جستجو برای: dust

تعداد نتایج: 41809  

Journal: :acta medica iranica 0
omid aminian department of occupational medicine, occupational medicine research center, tehran university of medical sciences, tehran, iran. maryam aslani department of occupational medicine, occupational medicine research center, tehran university of medical sciences, tehran, iran. khosro sadeghniiat haghighi department of occupational medicine, occupational medicine research center, tehran university of medical sciences, tehran, iran.

cement dust exposure is associated with increased respiratory impairment. as the major occupational hazard in the cement production industry is cement particles, our aim was to more thoroughly examine the acute effects of occupational exposure to cement dust on the respiratory system. a cross-shift study was conducted in a cement factory in iran. 100 high exposed workers from production and pac...

1936
L. Everard Napier Dharmendra

Cooke (1922) first drew attention to house dust as an etiological factor of asthma. Since then there have been reports of many cases of asthma which were dependent on sensitivity to house dust and occupation dusts, such as wheat dust (miller's asthma) and wood dust {e.g.. teak). In the case of occupational dusts the nature of the allergen is known, but nothing definite is so far known regarding...

Journal: :iranian journal of public health 0
f. golbabai ; a. tirgari ;m. mahmoudi

in order to compare sampling efficiencies of total and inhalable dust methods, three airborne dust sampling systems , 7-hole sampler , close and open face filter cassette were compared side-by-side , as stationary and for the personal samplers , in a wood working industry to evaluate their relative efficiency. a total of 162 samples were collected. the study of particle size distribution by cas...

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In arid and semiarid region, dust happened frequently. Including, result of adverse effects the occurrence of dust is on agricultural production, soil and water pollution, diseases of the respiratory and environmental issues, social challenges, a sharp reduction in horizontal visibility and traffic accidents resulting from its. In this research, changes in the number dust occurrence on the moon...

Ali Naghizadeh, Elham Derakhshani, Habibeh Shahabi, Motahareh Nazinejad,

  Background & Aims of the Study: Dust is one of the detrimental factors in workplace of tile industry. Exposure to excessive amount of dust can create various hazards to the workers. Therefore, the present study aimed to measure the concentration of environmental and respirable dust in air of Birjand Niloofar tile Industry. Materials & Methods: In the present study, using personal...

ژورنال: علوم آب و خاک 2017

Dust deposition phenomenon is an important climatic and environmental issue in arid and semi-arid regions. The objective of this study was to examine important characteristics of atmospheric dust in Kerman as one of the major cities in arid areas of our country with high potential of dust production. Dust samples were collected monthly using glass traps installed on the roof of 35 one-story bui...

Journal: :محیط شناسی 0
عباسعلی ولی استادیار بیابان زدایی، گروه علوم مهندسی بیابان، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران سجاد خاموشی کارشناسی ارشد بیابان زدایی، گروه علوم مهندسی بیابان، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه کاشان، سید حجت موسوی استادیار ژئومورفولوژی، گروه جغرافیا و اکوتوریسم، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران فاطمه پناهی استادیار بیابان زدایی، گروه علوم مهندسی بیابان، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران احسان تمسکی کارشناسی ارشد بیابان زدایی، دانشگاه هرمزگان، بندرعباس، ایران

introduction dust storms, one type of dust event, are in most cases the result of turbulent winds, including convective haboobs, which raise large quantities of dust from desert surfaces and reduce visibility to less than 1 km. this dust reaches concentrations in excess of 6000 mg m3 in severe events. the major dust source regions are areas of arid and hyper-arid, with mean annual rainfalls of ...

Extended Abstract Introduction: Dust storm is a major weather event that plays an important role in the Earth’s atmosphere and ocean surfaces. Dust storms affect marine phytoplankton, soil physical and chemical characteristics in entrainment and deposition areas, climate and radiative forcing, economic loss, and human health. They mostly originate from Introduction: Dust storm is a major weath...

Journal: :آب و خاک 0
رضا بیت لفته احمد لندی سعید حجتی غلامعباس صیاد

introduction: recently, air pollution due to the occurrence of dust storms is one of the worst environmental problems in western and southwestern iran, especially the khuzestan province (12, 13). according to the reports of the meteorological organization of iran the average number of dusty days in the cities of ahvaz and abadan in the khuzestan province reaches 68 and 76 days each year, respec...

This research was conducted to identify the dust storms in the Midwest of Iran from June 16 to 19, 2015. To investigate the synoptic conditions of the causes of this phenomenon, the ECMWF has an array of 0.125 degrees, including geopotential, omega, and sea level pressure, orbital and meridian components of the wind, specific humidity Soil moisture was applied to a depth of 10 cm. Similarly, fo...

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