نتایج جستجو برای: dust accumulation

تعداد نتایج: 190742  

2009
Saleh Matar

The purpose of this study was to identify and assess dust exposure in Electrical Arc Furnaces for steel manufacturing. The major concern of steel making processes is dust generation and accumulation. The scope of this research paper focuses on different ways to improve current controls and make recommendations. In order to achieve the purpose, various goals were developed to identify the extent...

2004
A. D. Clarke Y. Shinozuka V. N. Kapustin S. Howell B. Huebert S. Doherty T. Anderson D. Covert J. Anderson X. Hua K. G. Moore C. McNaughton G. Carmichael R. Weber

[1] During Transport and Chemical Evolution over the Pacific (TRACE-P) and Asian Aerosol Characterization Experiment (ACE-Asia) we measured the dry size distribution of Asian aerosols, their state of mixing, and the optical properties of dust, black carbon (BC) and other aerosol constituents in combustion and/or dust plumes. Optical particle sizing in association with thermal heating extracted ...

2015
M. G. Babechuk M. Widdowson M. Murphy

a r t i c l e i n f o chemostratigraphy of two contrasting Deccan Traps weathering profiles – an ancient, deeply weathered laterite, and a younger (Quaternary), more moderately weathered saprolite – are used to reconstruct different aspects of basalt weathering. Precision of the HFSE analyses is demonstrated through a report of the long-term concentrations and ratios determined in United States...

2010
Richard L. Reynolds Marith C. Reheis Jason C. Neff Harland Goldstein James Yount

In a semi-arid, upland setting on the Colorado Plateau that is underlain by nutrient-poor Paleozoic eolian sandstone, alternating episodes of dune activity and soil formation during the late Pleistocene and Holocene have produced dominantly sandy deposits that support grass and shrub communities. These deposits also contain eolian dust, especially in paleosols. Eolian dust in these deposits is ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2001
R Reynolds J Belnap M Reheis P Lamothe F Luiszer

Aeolian dust (windblown silt and clay) is an important component in arid-land ecosystems because it may contribute to soil formation and furnish essential nutrients. Few geologic surfaces, however, have been characterized with respect to dust-accumulation history and resultant nutrient enrichment. We have developed a combination of methods to identify the presence of aeolian dust in arid region...

Journal: :International journal of clinical and experimental medicine 2015
Xiaodong Zhan Chaopin Li Haifeng Xu Pengfei Xu Haibin Zhu Jidong Diao Na Li Beibei Zhao

We detected the concentration of dust mites allergen (Der f1 & Der p1) in the air of different places before and after the starting of air-conditioners in Wuhu City, Anhui, China, and to discuss the relation between the dust mites allergen in air-conditioner filters and the asthma attack. The dust samples were collected from the air-conditioner filters in dining rooms, shopping malls, hotels an...

Journal: :International Journal of Computation and Applied Sciences 2016

Journal: :American journal of physical anthropology 1995
P S Ungar M F Teaford K E Glander R F Pastor

Dental microwear researchers consider exogenous grit or dust to be an important cause of microscopic wear on primate teeth. No study to date has examined the accumulation of such abrasives on foods eaten by primates in the forest. This investigation introduces a method to collect dust at various heights in the canopy. Results from dust collection studies conducted at the primate research statio...

Journal: :Journal of the Japan Society for Precision Engineering 2001

2016
Bekir Sami. Yilbas Haider Ali Naseer Al-Aqeeli Mazen M. Khaled Syed Said Numan Abu-Dheir Necar Merah Kamal Youcef-Toumi Kripa K. Varanasi

Owing to recent climate changes, dust storms are increasingly common, particularly in the Middle East region. Dust accumulation and subsequent mud formation on solid surfaces in humid environments typically have adverse effects on surface properties such as optical transmittance, surface texture, and microhardness. This is usually because the mud, which contains alkaline and ionic species, adhe...

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