Academic literature on the topic 'Atmospheric deposits'

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Journal articles on the topic "Atmospheric deposits"

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Skarżyńska, K., Ż. Polkowska, and J. Namieśnik. "Sampling of Atmospheric Precipitation and Deposits for Analysis of Atmospheric Pollution." Journal of Automated Methods and Management in Chemistry 2006 (2006): 1–19. http://dx.doi.org/10.1155/jammc/2006/26908.

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This paper reviews techniques and equipment for collecting precipitation samples from the atmosphere (fog and cloud water) and from atmospheric deposits (dew, hoarfrost, and rime) that are suitable for the evaluation of atmospheric pollution. It discusses the storage and preparation of samples for analysis and also presents bibliographic information on the concentration ranges of inorganic and organic compounds in the precipitation and atmospheric deposit samples.
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Kim, Jiyoung, Chan Hee Lee, Ran Hee Kim, and Eun Jeong Shin. "Characterization of White and Black Deposits on the Surface of Korean Stone Cultural Heritages." Microscopy and Microanalysis 19, S5 (2013): 167–71. http://dx.doi.org/10.1017/s1431927613012580.

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AbstractWhite and black deposits have been frequently observed on the surface of Korean stone cultural heritages, and they are considered as damage factors in both conservation and esthetic points of view. In order to set up the appropriate conservation remedy, it is important to know their origins, characteristics, and compositions. In this study, optical and scanning electron microscopes (SEMs) equipped with an energy-dispersive spectrometer (EDS) and X-ray diffractometer were employed to determine the white and black deposits. It was found that both deposits consisted mainly of calcium carb
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Dong, Ke, Cheolwoon Woo, and Naomichi Yamamoto. "Plant assemblages in atmospheric deposition." Atmospheric Chemistry and Physics 19, no. 18 (2019): 11969–83. http://dx.doi.org/10.5194/acp-19-11969-2019.

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Abstract. Plants disperse spores, pollen, and fragments into the atmosphere. The emitted plant particles return to the pedosphere by sedimentation (dry deposition) and/or by precipitation (wet deposition) and constitute part of the global cycle of substances. However, little is known regarding the taxonomic diversities and flux densities of plant particles deposited from the atmosphere. Here, plant assemblages were examined in atmospheric deposits collected in Seoul in South Korea. A custom-made automatic sampler was used to collect dry and wet deposition samples for which plant assemblages an
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Mohamed, Benahmed, Dellal Abdelkader, and Hellal Benchaben. "Mobilite Du Plomb Et Du Zinc Issus De Retombees Atmospheriques Dans Le Sol : Cas De La Zone Industrielle De Tiaret, Algerie." European Scientific Journal, ESJ 12, no. 18 (2016): 131. http://dx.doi.org/10.19044/esj.2016.v12n18p131.

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Study of heavy metals mobility in soil is a necessary step for making an accurate appraisal and quantitative evaluation of the extent of contamination, indeed, wet and dry atmospheric deposits, plays an important role in the cycle of semi-volatile contaminants (Vinogradova, 2000). Metallurgical industries release heavy metals into the atmosphere, these last, clump together to form fines particles suspended in the air, these metals can be transported by wind via aerosol or aqueous pathway and deposited in the soil. The main aim of this work was to study the mobility and fate of lead and zinc fr
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Tripathi, B. D., Anamika Tripathi, and Kiran Misra. "Atmospheric dustfall deposits in Varanasi City." Atmospheric Environment. Part B. Urban Atmosphere 25, no. 1 (1991): 109–12. http://dx.doi.org/10.1016/0957-1272(91)90044-f.

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Liu, Mingyi, Bailin Wu, Xin Zheng, et al. "SIMS Dating of Granite-Hosted Uranium Deposits in the Xiazhuang Ore Field and Its Geological Significance." Minerals 15, no. 6 (2025): 622. https://doi.org/10.3390/min15060622.

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Using pitchblende uranium ore GBW04420 as the standard material and through the secondary ion mass spectrometry (SIMS) technical method, the in situ U-Pb isotopic chronology characteristics of the main granite-type uranium deposits in the Xiazhuang ore field in the Nanling area of southern China were studied. Firstly, the suitability of GBW04420 as the in situ U-Pb isotopic dating standard material for uranium minerals was verified. On this basis, the in situ U-Pb isotopic ages of the three main granite-type uranium deposits in the Xiazhuang ore field, namely the Xianshi, Zhaixia, and Xiwang d
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Mason, R. H., C. Chou, C. S. McCluskey, et al. "The micro-orifice uniform deposit impactor–droplet freezing technique (MOUDI-DFT) for measuring concentrations of ice nucleating particles as a function of size: improvements and initial validation." Atmospheric Measurement Techniques 8, no. 6 (2015): 2449–62. http://dx.doi.org/10.5194/amt-8-2449-2015.

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Abstract. The micro-orifice uniform deposit impactor–droplet freezing technique (MOUDI-DFT) combines particle collection by inertial impaction (via the MOUDI) and a microscope-based immersion freezing apparatus (the DFT) to measure atmospheric concentrations of ice nucleating particles (INPs) as a function of size and temperature. In the first part of this study we improved upon this recently introduced technique. Using optical microscopy, we investigated the non-uniformity of MOUDI aerosol deposits at spatial resolutions of 1, 0.25 mm, and for some stages when necessary 0.10 mm. The results f
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Mason, R. H., C. Chou, C. S. McCluskey, et al. "The micro-orifice uniform deposit impactor-droplet freezing technique (MOUDI-DFT) for measuring concentrations of ice nucleating particles as a function of size: improvements and initial validation." Atmospheric Measurement Techniques Discussions 8, no. 2 (2015): 2223–61. http://dx.doi.org/10.5194/amtd-8-2223-2015.

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Abstract. The micro-orifice uniform deposit impactor-droplet freezing technique (MOUDI-DFT) combines particle collection by inertial impaction (via the MOUDI) and a microscope-based immersion freezing apparatus (the DFT) to measure atmospheric concentrations of ice nucleating particles (INPs) as a function of size and temperature. In the first part of this study we improved upon this recently introduced technique. Using optical microscopy, we investigated the non-uniformity of MOUDI aerosol deposits at spatial resolutions of 1, 0.25 mm, and for some stages when necessary 0.10 mm. The results f
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Lamare, M. L., J. Lee-Taylor, and M. D. King. "The impact of atmospheric mineral aerosol deposition on the albedo of snow and sea ice: are snow and sea ice optical properties more important than mineral aerosol optical properties?" Atmospheric Chemistry and Physics Discussions 15, no. 16 (2015): 23131–72. http://dx.doi.org/10.5194/acpd-15-23131-2015.

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Abstract. Knowledge of the albedo of polar regions is crucial for understanding a range of climatic processes that have an impact on a global scale. Light absorbing impurities in atmospheric aerosols deposited on snow and sea ice by aeolian transport absorb solar radiation, reducing albedo. Here, the effects of five mineral aerosol deposits reducing the albedo of polar snow and sea ice are considered. Calculations employing a coupled atmospheric and snow/sea ice radiative-transfer model (TUV-snow) show that the effects of mineral aerosol deposits is strongly dependent on the snow or sea ice ty
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Xin, Shihong, Chuqi Peng, Junchao Qi, Baiwan Su, and Yan Xiao. "Effect of Deposits on Micron Particle Collision and Deposition in Cooling Duct of Turbine Blades." Crystals 15, no. 6 (2025): 510. https://doi.org/10.3390/cryst15060510.

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Aerospace engines ingest small particles when operating in a particulate-rich environment, such as sandstorms, atmospheric pollution, and volcanic ash clouds. These micron particles enter their cooling channels, leading to film-cooling hole blockage and thus thermal damage to turbine blades made of nickel-based single-crystal superalloy materials. This work studied the collision and deposition mechanisms between the micron particles and structure surface. A combined theoretical and numerical study was conducted to investigate the effect of deposits on particle collision and deposition. Finite
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Dissertations / Theses on the topic "Atmospheric deposits"

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Westbrook, Owen William. "Crater ice deposits near the south pole of Mars." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53113.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2009.<br>Includes bibliographical references (p. 55-60).<br>Layered deposits atop both Martian poles are thought to preserve a record of past climatic conditions in up to three km of water ice and dust. Just beyond the extent of these south polar layered deposits (SPLD), dozens of impact craters contain large mounds of fill material with distinct similarities to the main layered deposits. Previously identified as outliers of the main SPLD, these deposits could offer clues to the climatic
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Tong, Lege. "Material selection for a dry atmospheric mercury deposits sampler, an integrated chemical and statistical approach." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ35859.pdf.

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Lin, Zhi-Qing. "Trace metal contamination in forests of southern Quebec and pathway studies of airborne metal deposits." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40177.

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Trace metal contamination of the air-soil-tree system was examined in southern Quebec, where acid deposition and tree dieback have been recorded in high elevation forests. Mn pollution was emphasized due to its large emission from gasoline combustion in Canada. Airborne Cu, Mn, V, and Zn showed higher concentrations than those reported for other remote locations. Significant fluctuation in Mn concentrations during the winter-spring season was explored by air mass back trajectory analysis. The study suggested that high Mn concentrations resulted from the atmospheric long-range transport from Ca
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Craddock, Paul R. "Geochemical tracers of processes affecting the formation of seafloor hydrothermal fluids and deposits in the Manus back-arc basin." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/55328.

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Thesis (Ph. D.)--Joint Program in Chemical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2009.<br>Includes bibliographical references.<br>Systematic differences in trace element compositions (rare earth element (REE), heavy metal, metalloid concentrations) of seafloor vent fluids and related deposits from hydrothermal systems in the Manus back-arc basin (Eastern Manus Basin, EMB and Manus Spreading Center, MSC) are used to investigate processes that affect their formation. Processes respo
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Delaine, Maxence. "La composition des thèques d'amibes xénosomiques : utilisation potentielle comme bio-indicateur des dépôts de particules d’origine atmosphérique." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2017/document.

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Les amibes à thèque, également appelés thécamoebiens, sont des micro-organismes unicellulaires, qui construisent une enveloppe rigide, appelée thèque (Adl et al., 2012). Ces thèques ont des tailles, formes et natures très variées (Ogden &amp; Hedley, 1980). Les récentes études sur la composition des thèques ont conduit à émettre l’hypothèse que les amibes xénosomiques (constituées de particules exogènes), peuvent constituer des bio-indicateurs pertinents de la diversité particulaire de l’environnement minéral, organique et biologique dans lequel elles évoluent.L’objectif principal des recherch
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Danna, James G. "Experimental study of clast orientation in gravels deposited by unidirectional flow." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/57919.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.<br>Microfiche copy available in Archives and Science.<br>Bibliography: leaves 83-84.<br>by James G. Danna.<br>M.S.
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Dunlop, Luke Arthur. "Investigation and comparison of oxide thin films deposited via two low temperature atmospheric pressure routes." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609263.

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Durrieu, Gael. "Apports fluviaux et atmosphériques d'éléments traces métalliques et métalloïdes en zone côtière méditerranéenne : cas de la rade de Toulon." Electronic Thesis or Diss., Toulon, 2022. http://www.theses.fr/2022TOUL0015.

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Les zones côtières représentent un enjeu majeur en termes d’activités économiques et de préservation d’un bon état chimique et écologique du milieu naturel. Si à l’échelle globale (mer ou océan) les flux de contaminants notamment les éléments traces métalliques et métalloïdes (ETMM) sont relativement bien étudiés et décrits, ce n’est pas le cas des zones plus enclavées à une échelle plus locale. La rade de Toulon qui possède une morphologie semi-fermée est entourée d’une métropole importante (450 000 habitants) avec une forte activité anthropique (premier port militaire en France, ports civils
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Fahrni, Jason K. "Assessment of the Severity, Sources, and Meteorological Transport of Ambient and Wet Deposited Mercury in the Ohio River Valley Airshed." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125427320.

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Elwin, Gareth Steven. "Atmospheric pressure chemical vapour deposition of the nitrides and oxynitrides of vanadium, titanium and chromium." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322369.

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Books on the topic "Atmospheric deposits"

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G, Rault Didier F., and Langley Research Center, eds. Direct simulation Monte Carlo prediction of on-orbit contaminant deposit levels for HALOE. National Aeronautics and Space Administration, Langley Research Center, 1994.

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Court, D. G. The deposition and characterisation of atmospheric pressure chemical vapour deposited silicate glass films: A dissertation in partial fulfilment of the requirement for the degree of Master of Science of the Council for National Academic Awards. Middlesex Polytechnic, 1988.

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Canada. External Affairs and International Trade Canada. Environment : agreement establishing the Inter-American Institute for Global Change Research Montevideo, May 13, 1992 signed by Canada March 25, 1993, Canadian Notification deposited June 15, 1993 in force for Canada March 12, 1994 =: Environnement : accord relatif à la création d'un institut interaméricain de recherches sur les changements à l'échelle du globe, Montevideao, le 13 mai 1992 signé par le Canada le 25 mars 1993 notification du Canada déposée le 15 juin 1993 en vigueur pour le Canada le 12 mars 1994. Queen's Printer for Canada = Imprimeur de la Reine pour le Canada, 1995.

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Canfield, Donald Eugene. The Early History of Atmospheric Oxygen: Geological Evidence. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691145020.003.0007.

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This chapter explores geological and chemical evidence for the history of atmospheric oxygen on early Earth, with a focus on the Archean Eon. It starts by investigating some of the evidence in the gold mines of South Africa. Some of these mines, located in the Witwatersrand Basin near Johannesburg, have been dug to depths of over 3.9 km (2.4 miles). A closer look at the rocks shows that they represent an ancient river deposit dated to some 2.8 to 3.1 billion years ago. The gold in these deposits was transported by strong river currents and was occasionally trapped among the cobbles and sands f
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Barendregt, R. W., J. V. Matthews, V. Behan-Pelletier, et al., eds. Biostratigraphy, Age, and Paleoenvironment of the Pliocene Beaufort Formation on Meighen Island, Canadian Arctic Archipelago. Geological Society of America, 2021. http://dx.doi.org/10.1130/spe551.

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The Beaufort Formation records extraordinary details of Arctic environments and amplified temperatures at approximately modern levels of atmospheric CO2. It was deposited during the Neogene on the western side of what is now the Canadian Arctic Archipelago. Meighen Island is a key locality for studying this formation because marine sediments there are interbedded with terrestrial fossiliferous sands. The biostratigraphic succession, fossils from the marine beds, and paleomagnetic data from the Bjaere Bay region of the island suggest two potential ages for the studied exposures: either continuo
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Canfield, Donald Eugene. Phanerozoic Oxygen. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691145020.003.0011.

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This chapter discusses the modeling of the history of atmospheric oxygen. The most recently deposited sediments will also be the most prone to weathering through processes like sea-level change or uplift of the land. Thus, through rapid recycling, high rates of oxygen production through the burial of organic-rich sediments will quickly lead to high rates of oxygen consumption through the exposure of these organic-rich sediments to weathering. From a modeling perspective, rapid recycling helps to dampen oxygen changes. This is important because the fluxes of oxygen through the atmosphere during
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Kesler, Stephen E., and Hiroshi Ohmoto. Evolution of Early Earth's Atmosphere, Hydrosphere, and Biosphere - Constraints from Ore Deposits. Geological Society of America, 2006. http://dx.doi.org/10.1130/mem198.

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Memoir 198: Evolution of Early Earth's Atmosphere, Hydrosphere, and Biosphere - Constraints from Ore Deposits. Geological Society of America, 2006. http://dx.doi.org/10.1130/978-0-8137-1198-0.

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Vaughan, David. 4. Earth’s surface and the cycling of minerals. Oxford University Press, 2014. http://dx.doi.org/10.1093/actrade/9780199682843.003.0004.

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‘Earth’s surface and the cycling of minerals’ considers the rock cycle, which has two parts. The first is driven by the heat coming from the Earth’s interior and involves interactions between the mantle and crust. The second is driven primarily by heat from the Sun and involves interactions between exposed crust and the waters of the hydrosphere or gases of the atmosphere. Minerals in these exposed rocks may be dissolved during weathering, or be transported in the flowing water of streams and rivers, by glaciers, or as fine mineral dusts in the atmosphere, eventually being deposited elsewhere
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(Editor), Stephen E. Kesler, and Hiroshi Ohmoto (Editor), eds. Evolution of Early Earth's Atmosphere, Hydrosphere, And Biosphere: Constraints from Ore Deposits (Memoir (Geological Society of America)). Geological Society of America, 2006.

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Book chapters on the topic "Atmospheric deposits"

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Birks, N., G. H. Meier, and F. S. Pettit. "Degradation of coatings by high temperature atmospheric corrosion and molten salt deposits." In Metallurgical and Ceramic Protective Coatings. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1501-5_11.

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Sirocko, Frank, and Michael Sarnthein. "Wind-Borne Deposits in the Northwestern Indian Ocean: Record of Holocene Sediments Versus Modern Satellite Data." In Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0995-3_17.

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Rokosz, M. J., B. E. Artz, and R. K. Belitz. "An XRF Method for the Analysis of Atmospheric Aerosol and Vehicular Particulate Deposits on Filters." In Advances in X-Ray Analysis. Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2471-3_26.

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Conrad, Klaus. "Optimal Intertemporal Pricing of Resource Stocks: The Case of Fossil Fuel Extraction and Atmospheric CO2 Deposits." In ZEW Economic Studies. Physica-Verlag HD, 2003. http://dx.doi.org/10.1007/978-3-642-57415-3_13.

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Kawamura, Hidehisa, Nobuaki Matsuoka, Shinji Tawaki, and Noriyuki Momoshima. "Sulfur Isotope Variations in Atmospheric Sulfur Oxides, Particulate Matter and Deposits Collected at Kyushu Island, Japan." In Acid rain 2000. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-007-0810-5_143.

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Cernusak, Lucas A., and Nerea Ubierna. "Carbon Isotope Effects in Relation to CO2 Assimilation by Tree Canopies." In Stable Isotopes in Tree Rings. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_9.

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AbstractThe carbon atoms deposited in tree rings originate from the CO2 in the atmosphere to which the tree’s canopy is exposed. Thus, the first control on the stable carbon-isotope composition of tree rings is by δ13C of atmospheric CO2. There has been an inter-annual trend of decreasing δ13C of atmospheric CO2 over the past two centuries as a result of combustion of fossil fuels and land-use change. Atmospheric CO2 is, for the most part, well mixed, but the sub-canopy air space can become depleted in 13C due to inputs from soil and plant respiration when turbulent exchange with the troposphe
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Frimmel, Hartwig E. "The world’s largest gold province: Implications on Archaean atmospheric evolution." In Mineral Deposit Research: Meeting the Global Challenge. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_242.

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Burkhardt, Jürgen, Kerstin Koch, and Hartmut Kaiser. "Deliquescence of Deposited Atmospheric Particles on Leaf Surfaces." In Air-Surface Exchange of Gases and Particles (2000). Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-9026-1_31.

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Schmitt, J. M. "Weathering, Rainwater and Atmosphere Chemistry: Example and Modelling of Granite Weathering in Present Conditions in a CO2-Rich, and in an Anoxic Palaeoatmosphere." In Palaeoweathering, Palaeosurfaces and Related Continental Deposits. Blackwell Publishing Ltd., 2009. http://dx.doi.org/10.1002/9781444304190.ch1.

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Spiegel, M., and H. J. Grabke. "Corrosion of 2.25CR-1MO Steel Under Fly Ash Deposits in Simulated Waste Incineration Atmospheres." In The Impact of Ash Deposition on Coal Fired Plants. Routledge, 2022. http://dx.doi.org/10.1201/9780203736616-70.

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Conference papers on the topic "Atmospheric deposits"

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Kloesel, Michael, Nicholas Ury, Steven Maldonado, et al. "Deposit-Induced Corrosion of Ni-Cr Alloys in Calcium-Based Salt Mixtures." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-21212.

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Abstract Corrosion of gas turbine components at high temperatures under salt deposits is a critical issue that adversely affects their performance and longevity. Calcium-containing compounds have been detected in the analysis of failed components. These compounds may have different origins, e.g., sand particles, salts from marine atmospheres, atmospheric pollutants, etc. The consequences of the reactions between the salt deposits and the alloy substrate can result in enhanced solute depletion, and removal/destruction of the external protective scale. In this presentation, the focus will be on
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Khuraibut, Yousef. "Study on Elemental Sulfur Formation from Black Powder Deposits." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17678.

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Abstract The Black Powder in gas and associated processing equipment is a global phenomenon that many operating companies had and still suffering from. The composition of Black Powder has been found to vary significantly in chemical composition. However, the constituents mainly consist of iron sulfides (FeS) and iron oxides. Black Powder is known to cause serious problems to pipelines, such as flow inefficiency, product contamination, wear, plugging, and under deposit corrosion. Another major concern is the possible formation of elemental sulfur, which could be produced as a by-product of oxid
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Patel, Amit, Jesse Contreras, John Green, and John Wodarcyk. "Physical Fouling inside a Crude Unit Overhead from a Reaction Byproduct of Hexahydro-1,3,5-Tris(2-Hydroxyethyl)-S-triazine Hydrogen Sulfide Scavenger." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-06054.

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Abstract Monoethanolamine (MEA) hydrochloride salts, which are formed from the use of hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine (commonly referred to as MEA triazine), a hydrogen sulfide scavenger, can create major corrosion issues inside an atmospheric crude oil distillation unit. Recently, deposit formation has been observed in a crude unit processing significant quantities of tight oil; these deposits result from polymerization of dithiazines (a reaction byproduct of MEA triazine) in the presence of hydrogen sulfide. Such fouling has been reported in upstream applications. This paper
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Tawns, Alastair, and Robin Oakley. "Cathodic Protection at a Simulated Depth of 2500m." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00134.

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Abstract The hydrogen embrittlement and cathodic protection characteristics of several subsea pipeline and flexible riser / hose steels were investigated in simulated deepwater service conditions. Static four-point bending loads were combined with an impressed potential of −1.1 V Ag/AgCl, at a pressure of 250 bar in a synthetic seawater solution. The experiment applied a static load to welded pipeline steel specimens and un-welded flexible hose armour wire specimens by four point bending. Sacrificial cathodic protection from aluminium bracelet anodes was simulated by a multi-channel potentiost
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Höwing, Jonas, Josefin Eidhagen, and Karen Picker. "Corrosion Properties of UNS N08935 in Crude Distillation Unit Overhead Service Conditions." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16833.

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Abstract Overhead condensers (OHC) in refinery applications such as atmospheric and vacuum distillation units often experience very corrosive environments due to condensation of hydrochloric acid, HCl. The acid is often neutralized using water washing and addition of a caustic solution such as ammonia (NH3) or an organic amine such as monoethanolamine (MEA) or dimethylethanolamine (DMEA). While neutralizing the HCl, addition of these bases can lead to chloride salt deposits with following possible pitting corrosion, under deposit corrosion and stress corrosion cracking of the tubes in the OHC.
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Sethi, Vijay K., and William Partanen. "Corrosion and Wear Issues in a Wood-Fired Gas Turbine System." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94172.

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Abstract A wood-fired gas turbine system for specialized cogeneration applications is being developed. The System is based on a patented pressurized, suspension-type combustor. A demonstration of the technical and economic viability of the integrated wood-fired System is being funded by the U.S. Department of Energy through Morgantown Energy Technology Center and the National Renewable Energy Laboratory, and Power Generating Incorporated, and the plans are underway to build and operate an approximately 400 kW prototype system at the Western Research Institute’s facilities in Laramie, Wyoming.
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Wang, D. Y., and K. Natesan. "Corrosion Evaluation of Weldments Exposed in TVA and Rocketdyne Atmospheric Fluidized Bed Combustors." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90284.

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Abstract A number of experimental iron-, nickel-, and cobalt-base weldment materials were exposed in TVA 20MW and Rocketdyne atmospheric fluidized bed Combustors (AFBCs) at 849°C for 1261 h and 871°C for 1000 h, respectively. Postexposure analyses were conducted at Argonne National Laboratory. All specimens experienced different degree of internal oxidation/sulfidation. Among eight filler materials, Marathon 25/35R and Haynes 188 showed the least corrosion attack, i.e., less than 0.5 mm/yr. The high nickel content in the weldment turned out to be unfavorable for corrosion resistance in the AFB
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Alharthi, Razan, Matteo Leoni, Amani Alghamdi, and Xiangyang Zhu. "Evaluation of Microbial Corrosion Implications in Flooded Pipe Strings." In MECC 2023. AMPP, 2023. https://doi.org/10.5006/mecc2023-20068.

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Abstract Microbiologically-induced corrosion (MIC) accounts for 20-30% of all corrosion cases in the oil and gas industry [1,2]. The extended exposure of pipeline to various environmental conditions affect the integrity of pipeline leading to serious operational implications. Regular integrity assessment is required to understand and predict the pipeline’s susceptibility to microbial corrosion threat and provide proactive measures to control its impact. One case study investigated the microbiological and compositional properties of solid deposits collected from flooded pipe strings, which were
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Schindelholz, Eric J., Robert G. Kelly, and Bailey E. Risteen. "Effect of Relative Humidity on Corrosion of Steel under Acidified Artificial Seawater Particles." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05987.

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Abstract The aim of this work was to elucidate the relationship between the hygroscopic behavior of acidified artificial seawater (ASW) microparticles, as a proxy for sea salt aerosol (SSA), and the atmospheric corrosion of mild steel contaminated with them. The wetting and drying behavior of acidified ASW microparticles deposited on an inert interdigitated electrode sensor was characterized by impedance measurements. Carbon steel coupons loaded with the same contaminant were subjected to isohumidity exposures for up to 30 days. The resulting damage was quantified by optical profilometry. Sust
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Hindam, H., J. B. Gilmour, R. H. Packwood, D. C. Briggs, and A. Lui. "The Canadian Atmospheric Fluidized Bed Combustion Materials Program Part II. Metallographic Observations." In CORROSION 1987. NACE International, 1987. https://doi.org/10.5006/c1987-87016.

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Abstract The degradation behaviour of several ferritic/austenitic Fe-based alloys exposed in the Point Tupper Atmospheric Fluidized Bed Combustor (ABC) for up to 10,000 h is discussed, based primarily on electron-probe microanalysis (EPMA). The ferritic alloys (A1, T11, T22 and T91) exhibit thick Fe3O4 scales containing dissolved Cr in proportion to the alloy chromium content. Minor sulfidation occurs in the form of FeS in the inner scale region in Type Al steel or as CrxSy precipitated internally in the other alloys. A thin, partially protective Cr2O3 film developed in T91 at the alloy/scale
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Reports on the topic "Atmospheric deposits"

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Douglas, Thomas, and Joel Blum. Mercury isotopes reveal atmospheric gaseous mercury deposition directly to the Arctic coastal snowpack. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41046.

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Springtime atmospheric mercury depletion events (AMDEs) lead to snow with elevated mercury concentrations (&gt;200 ng Hg/L) in the Arctic and Antarctic. During AMDEs gaseous elemental mercury (GEM) is photochemically oxidized by halogens to reactive gaseous mercury which is deposited to the snowpack. This reactive mercury is either photochemically reduced back to GEM and reemitted to the atmosphere or remains in the snowpack until spring snowmelt. GEM is also deposited to the snowpack and tundra vegetation by reactive surface uptake (dry deposition) from the atmosphere. There is little consens
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Douglas, Thomas, Matthew Sturm, Joel Blum, et al. A pulse of mercury and major ions in snowmelt runoff from a small Arctic Alaska watershed. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41203.

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Atmospheric mercury (Hg) is deposited to Polar Regions during springtime atmospheric mercury depletion events (AMDEs) that require halogens and snow or ice surfaces. The fate of this Hg during and following snowmelt is largely unknown. We measured Hg, major ions, and stable water isotopes from the snowpack through the entire spring melt runoff period for two years. Our small (2.5 ha) watershed is near Barrow (now Utqiaġvik), Alaska. We measured discharge, made 10 000 snow depths, and collected over 100 samples of snow and meltwater for chemical analysis in 2008 and 2009 from the watershed snow
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Langlois, E., S. D. Murthy, I. Bhat, et al. Characteristics of indium oxide plasma filters deposited by atmospheric pressure CVD. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/350942.

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Branch, Brittany, Chad McCoy, and Andrew Vackel. Impact Response of Control Atmosphere Plasma Spray Deposited Materials. Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1868139.

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Vackel, Andrew. Residual stress of controlled atmosphere plasma spray blended metal deposits measured via in-situ substrate curvature method. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/2430332.

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Lin, Hongwei, Yanjun Gao, Kang Sun, and Faguang Jin. Association between PM2.5 pollution and outpatient visits for respiratory diseases in China: a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.5.0144.

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Review question / Objective: Previous epidemiological studies on the association between PM2.5 pollution and outpatient visits for respiratory diseases in China were mostly limited to one region, and the different papers have no coherent results. Our objective is to perform a systematic review and meta-analysis of the relevant literature in order to summarize the association between PM2.5 pollution and outpatient visits for respiratory diseases in multiple cities in China. Condition being studied: As an important component of air pollutants, particulate matter 2.5 (PM2.5) can float in the atmo
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EGR Cooler Fouling Reduction: A New Method for Assessment in Early Engine Development Phase. SAE International, 2022. http://dx.doi.org/10.4271/022-01-0589.

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High pressure EGR provides NOx emission reduction even at low exhaust temperatures. To maintain a safe EGR system operation over a required lifetime, the EGR cooler fouling must not exceed an allowable level, even if the engine is operated under worst-case conditions. A reliable fouling simulation model represents a valuable tool in the engine development process, which validates operating and calibration strategies regarding fouling tendency, helping to avoid fouling issues in a late development phase close to series production. Long-chained hydrocarbons in the exhaust gas essentially impact
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