872 resultados para Sewage epidemiology
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"December 2006"
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"Project no. 20./32."
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"Preliminary print."
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"ILENR/AE-92/02."
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Vols. 76 include Reference and data section for 1929 (1929- called Water works and sewerage data section)
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"Material is based on surveys made for the Medical department of the United States army ... The surveys ... represent the work of a large number of individuals associated ... with the Medical intelligence division of the Office of the # general of the United States army."--Pref.
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Mode of access: Internet.
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No numbers were issued from May to Sept. 1911
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Bibliography at end of each chapter.
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Thesis (Ph.D.)--University of Washington, 2016-06
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A combination of physical and chemical measurements and biological indicators identified nutrient impacts throughout an Australian subtropical river estuary. This was a balance of sewage inputs in the lower river and agricultural inputs in the mid-upper river, the combined influence being greater in the wet season due to greater agricultural surface runoff. Field sampling in the region was conducted at 6 sites within the river, over 5 surveys to encapsulate both wet and dry seasonal effects. Parameters assessed were tissue nitrogen (N) contents and delta(15)N signatures of mangroves and macroalgae, phytoplankton nutrient addition bioassays, and standard physical and chemical variables. Strong spatial (within river) and temporal (seasonal) variability was observed in all parameters. Poorest water quality was detected in the middle (agricultural) region of the river in the wet season, attributable to large diffuse inputs in this region. Water quality towards the river mouth remained constant irrespective of season due to strong oceanic flushing. Mangrove and macroalgal tissue delta(15)N and %N proved a successful combination for discerning sewage and agricultural inputs. Elevated delta(15)N and %N represented sewage inputs, whereas low delta(15)N and elevated %N was indicative of agricultural inputs. Phytoplankton bioassays found the system to be primarily responsive to nutrient additions in the warmer wet season, with negligible responses observed in the cooler dry season. These results indicate that the Tweed River is sensitive to the different anthropogenic activities in its catchment and that each activity has a unique influence on receiving water quality.
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Opisthorchis viverrini is a food home trematode, important because of the sheer numbers of people infected and its serious morbidities such as hepatobiliary diseases and cholangiocarcinoma (CHCA). Although infections are identified throughout Southeast Asia, the epi-center is northeast Thailand, where high prevalence coexists with a high incidence of CHCA. In this review, we present the basic population features and the factors influencing transmission between the different hosts. (C) 2003 Elsevier B.V. All rights reserved.