Ditches
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Evaluation of filtration ditches as method of post treatment of effluent anaerobic : removal natural of pathogens and nutrients in application of high hydrauli rates / Avaliação das valas de filtração como metodo de pos-tratamento de efluente anaerobico : remoção natural de patogenos e nutrientes na aplicação de altas taxas hidraulicas
The aim of this work was to study filtration ditches as a method of low cost applicable the isolated homes and the small Brazilian municipalities for the posttreatment of anaerobic effluent from a system septic tank with anaerobic unit in the removal of natural nutrients and pathogenic microorganisms. For the research were analyzed three filtration ditches o
Publicado em: 2006
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14. Padrão quali-quantitativo do descarte de águas residuárias em áreas carentes: um estudo no Alto do Bom Viver em Salvador.
In most informal settlements (slums) found in Salvador, Bahia, Brazil, the inhabitants of these areas are surrounded by environmental degradation and their wastewater is thrown into steep rainwater ditches as there is little or no formal sewerage nor drainage system. This research attempts to analyse the wastewater disposed of by the population of the area A
Publicado em: 2005
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15. Hidrogeoquimica e a contaminação por nitrato em agua subterranea no bairro Piranema, Seropedica - RJ / Geochemistry and the nitrate contamination of groundwater in Piranema neighborhood, Seropedica-RJ, Brazil
Nitrate is found in waters, vegetable and animal tissues. Due to man activities, the concentration of nitrate in waters has increased in the last decades and a maximum allowed value for drinkable water was established by regulatory agencies. A common source of aquifers contamination by the nitrate is the use of in situ sanitation systems, like as cesspits an
Publicado em: 2005
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16. Activity of Euphorbia splendens var. hislopii N.E.B. (Euphorbiaceae) latex against Lymnaea columella (Say, 1817) (Pulmonata: Lymnaeidae), intermediate host of Fasciola hepatica, Linnaeus, 1758 (Trematoda: Fasciolidae). 2: limited field-testing
The molluscicidal evaluation of Euphorbia splendens var. hislopii (Crown of thorns) against Lymnaea columella snails, intermediate host of Fasciola hepatica, in irrigation ditches of the Pisciculture Station at Universidade Federal Rural do Rio de Janeiro, was studied under limited field conditions. An aqueous solution of the latex at 5 mg/l was tested in tw
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-10
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17. Molluscicidal action of the latex of Euphorbia splendens var. hislopii N.E.B. ("Christ's Crown") (Euphorbiaceae) against Lymnaea columella (Say, 1817) (Pulmonata: Lymnaeidae), intermediate host of Fasciola hepatica Linnaeus, 1758 (Trematode: Fasciolidae): 1- test in laboratory
The latex action of Euphorbia splendens var. hislopii (Christ's Crown) against snails Lymnaea columella, intermediate host of Fasciola hepatica, derived from irrigation ditches of the Station of Pisciculture at Universidade Federal Rural do Rio de Janeiro, was studied in the laboratory. Lab bioassays, using aqueous solutions of the latex, varying between 0.1
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-06
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18. Palaeoparasitology in Japan: discovery of toilet features
The development of palaeoparasitology in Japan has occurred in recent decades. Despite the fact that archaeology in Japan has been slow to develop techniques for excavating ancient toilets, important information about the development of sanitation has been derived from the analysis of a few sites. This shows that the earliest people had very simple methods o
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-01
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19. Isolation of non-O1 Vibrio cholerae serovars from surface waters in western Colorado.
Non-O1 Vibrio cholerae was isolated from rivers, creeks, washes, irrigation canals, and ditches in western Colorado during the summer of 1985. The organism occurred in fresh water (less than or equal to 5 mmol of Na+ per liter) as well as in water of higher salinity (approximately equal to 17 mmol per liter). Sixteen serovars of non-O1 V. cholerae were Sixte
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20. Microthrix parvicella, a filamentous bacterium isolated from activated sludge: cultivation in a chemically defined medium.
A large number of media have been tested for cultivating Microthris parvicella, a filamentous microorganism often present in the activated sludge of oxidation ditches. The bacterium was found to utilize oleic acid (preferably as Tween 80) as the sole source of carbon and energy. Sulfur is required in the reduced form. The tested media vary from a complex to
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21. Childhood Mortality Due to Drowning in Rural Matlab of Bangladesh: Magnitude of the Problem and Proposed Solutions
Drowning is an important cause of mortality among children in rural Bangladesh. Children aged 1–4 year(s) are at a high risk of death from drowning. Although deaths of children due to drowning in Bangladesh are acknowledged as an important cause of death, little effort has been made to address the issue of preventing deaths from this cause. This study has
International Centre for Diarrhoeal Disease Research.
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22. Floating plant dominance as a stable state
Invasion by mats of free-floating plants is among the most important threats to the functioning and biodiversity of freshwater ecosystems ranging from temperate ponds and ditches to tropical lakes. Dark, anoxic conditions under thick floating-plant cover leave little opportunity for animal or plant life, and they can have large negative impacts on fisheries
The National Academy of Sciences.
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23. Submersion injuries in children younger than 5 years in urban Utah.
Submersion injuries of children younger than 5 years in 4 urban Utah counties from 1984 through 1988 were studied retrospectively to identify associated risk factors. Infants younger than 1 year had the highest rates of both submersion injuries and deaths. The incidence of bathtub drownings was 2 to 3 times higher than reported national rates. All bathtub dr
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24. Anaerobic Mineralization of Quaternary Carbon Atoms: Isolation of Denitrifying Bacteria on Dimethylmalonate
The microbial capacity to degrade simple organic compounds with quaternary carbon atoms was demonstrated by enrichment and isolation of five denitrifying strains on dimethylmalonate as the sole electron donor and carbon source. Quantitative growth experiments showed a complete mineralization of dimethylmalonate. According to phylogenetic analysis of the comp
American Society for Microbiology.