Indicator Organisms
Mostrando 13-24 de 139 artigos, teses e dissertações.
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13. Adaptação de equipamento de geração de gases oxidantes para aplicação na desinfecção de água / Adaptation of generator oxidant gases equipament to aplication in water disinfection
Human consumption of water outside of the microbiological standards for drinking constitutes a health and disease risk factor. Through the process of infiltration in the soil, groundwater may be contaminated by the waste generated by human activity and deposited in the soil, waterways or air. The consumption of water in natura, captured in a spring, may lead
Publicado em: 2009
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14. Reúso de água e polimento de efluentes de lagoas de estabilização por meio de cultivo consorciado de plantas da família Lemnaceae e tilápias
Recently, the interests towards duckweed-based-ponds utilization are due to the fact that these systems present high nutrient and algae removal efficiencies, producing high protein biomass. The present work was developed at The Wastewater Treatment Plant from Florianópolis (Casan) and divided into three trials. The first and second trials were conducted at
Publicado em: 2008
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15. UV radiation application for sewer disinfection of the UASB reactor association with aerated submerged biofilter (ASB) / Aplicação de radiação UV para desinfecção de efluente da associação de reator UASB e biofiltro aerado submerso
This research has investigated and interpreted relevant aspects of disinfection by ultraviolet radiation (UVR) in the inativation of indicator microorganismsinactivation. The sanitary effluent was provided by anaerobic treatment (UASB reactor), followed by aerated submerged biofilter (ASB), on a real scale. This research was divided into two stages, whereas
Publicado em: 2007
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16. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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17. Kinetics of helminth eggs inactivation in water and digested sludges by saturated steam produced with methane from anaerobic digestors. / Inativação térmica de ovos de helmintos em água e em biossólidos digeridos: cinética em reator batelada e modelagem matemática em reator tubular.
Biological sludge can be a valuable resource for agricultural soil conditioning. However, an important obstacle for its use is the usual presence of pathogenic organisms, capable of disease dissemination. The main occurring pathogens are virus, bacteria, protozoa and helminth. Helminth eggs are very resistant to thermal inactivation. The Ascaris lumbricoids
Publicado em: 2006
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18. Impacto genotÃxico de poluentes quÃmicos presentes na Ãgua e sedimento do Rio Japaratuba (Sergipe)
In situ investigations of the effects of mutagenic pollutants (environmental monitoring) have increasingly used bioindicators, and fish often have been used in these studies as sentinel organisms. In the present study, we have used the piscine micronucleus test (MNT) as an in situ biological indicator of chemical contamination in two fresh water fish species
Publicado em: 2006
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19. Resistencia a antimicrobianos em cepas de Salmonella spp, Escherichia coli e Enterococcus spp isoladas de carcaças de frango
Chicken carcasses can act as a vehicle for pathogenic bacteria to human being, particularly for salmonellas. Food poisoning in humans from this source has become more frequent, the seriousness being directly related to the drug resistance profile of the organisms. The indiscriminate use of antibiotics in poultry therapeutics and in poultry feed as growth pro
Publicado em: 2004
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20. Alterações histológicas em placas ósseas do peixe cascudo Rineloricaria strigilata (Hensel) (Teleostei, Loricariidae) e sua freqüência no lago Guaíba, Rio Grande do Sul, Brasil
Little information is available about natural populations of fishes exposed to polluted waters in Brazil. Contaminants may be lethal or predispose fishes to sickness, being the analysis of aquatic organisms a good indicator of environmental quality. The violinha, Rineloricaria strigilata (Hensel, 1868), is a common loricariid catfish in the Guaíba lake basi
Revista Brasileira de Zoologia. Publicado em: 2001-09
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21. Distribution and Significance of Fecal Indicator Organisms in the Upper Chesapeake Bay
Total viable aerobic, heterotrophic bacteria, total coliforms, fecal coliforms, and fecal streptococci were enumerated in samples collected at five stations located in the Upper Chesapeake Bay, December 1973 through December 1974. Significant levels of pollution indicator organisms were detected at all of the stations sampled. Highest counts were observed in
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22. Effect of organotins on fecal pollution indicator organisms.
Pure cultures of Escherichia coli and Streptococcus faecalis and environmental water samples were examined for the possibility that pollution involving organotin compounds could decrease the values for indicator organisms when standard methods were applied to the analysis of water samples. (CH3)2SnCl2 and (CH3)3SnCl decreased viable counts at about 10 to 100
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23. Bacteriocin Typing of Vibrio cholerae
Bacteriocins of Vibrio cholerae have been demonstrated against enterobacterial and vibrio indicator organisms by conventional techniques. Abundant bacteriocin production took place on casein hydrolysate-yeast extract, tryptic soy, digest broth, proteose-peptone, and neopeptone agars. Essential factors were a citrate-phosphate buffer concentration of 0.5 to 0
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24. Magnitude of pollution indicator organisms in rural potable water.
A total of 460 water samples were randomly drawn from the potable water supply sources of rural communities in three counties of South Carolina. About 10% of the population, not incorporated in municipalities, was sampled. The samples were tested for total coliforms, Escherichia coli, and fecal streptococci. Significant levels of these pollution indicator or