Heterotrophic Bacteria
Mostrando 13-24 de 345 artigos, teses e dissertações.
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13. Protozoans bacterivory in a subtropical environment during a dry/cold and a rainy/warm season
In aquatic ecosystems, bacteria are controlled by several organisms in the food chain, such as protozoa, that use them as food source. This study aimed to quantify the ingestion and clearance rates of bacteria by ciliates and heterotrophic nanoflagellates (HNF) in a subtropical freshwater reservoir (Monjolinho reservoir -São Carlos -Brazil) during one year
Braz. J. Microbiol.. Publicado em: 2014
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14. Tank bromeliad water: similar or distinct environments for research of bacterial bioactives?
The Atlantic Rainforest does not have a uniform physiognomy, its relief determines different environmental conditions that define the composition of its flora and fauna. Within this ecosystem, bromeliads that form tanks with their leaves hold water reservoirs throughout the year, maintaining complex food chains, based mainly on autotrophic and heterotrophic
Braz. J. Microbiol.. Publicado em: 2014
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15. Hexavalent chromium reduction by aerobic heterotrophic bacteria indigenous to chromite mine overburden
Microbiological analysis of overburden samples collected from chromite mining areas of Orissa, India revealed that they are rich in microbial density as well as diversity and dominated by Gramnegative (58%) bacteria. The phenotypically distinguishable bacterial isolates (130) showed wide degree of tolerance to chromium (2-8 mM) when tested in peptone yeast e
Braz. J. Microbiol.. Publicado em: 2013
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16. Water quality and diversity of yeasts from tropical lakes and rivers from the Rio Doce basin in Southeastern Brazil
Yeast communities were assessed in 14 rivers and four lakes from the Doce River basin in Brazil, during the rainy and dry seasons of the years 2000 and 2001. Water samples were collected at the subsurface in all sites. The following physical and chemical parameters were measured: temperature, dissolved oxygen, pH, electrical conductivity, total phosphorus, o
Braz. J. Microbiol.. Publicado em: 2012-12
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17. Microcystin-XR degradation by bacteria isolated from public water supply system / Degradação da microcistina-XR por bactérias isoladas de sistema de abastecimento público de água
Microcystins are potent hepatotoxins and tumor promoters found in freshwaters that cause public health risks and thus represent a serious problem for water treatment plants. The cyanobacterium genus Microcystis is the most known toxin-producer and the most common bloom-forming in water reservoirs used for public supply. However, some bacteria are able to use
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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18. Perfil de resistência a antimicrobianos de bactérias isoladas de amostras de águas das escolas estaduais de Boa Vista - RR
Atualmente, uma das maiores preocupações da humanidade é com a disponibilidade e qualidade da água. A exploração inadequada das fontes acarreta a contaminação das águas superficiais e subterrâneas que se tornam um risco para a saúde pública. Dentre as fontes biológicas de contaminação da água, incluem-se as bactérias, que são responsáveis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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19. Cultivation of juvenile fat snook (Centropomus parallelus Poey, 1860) fed probiotic in laboratory conditions
The objective of this study was to investigate the growth of juvenile fat snook (Centropomus parallelus) in laboratory conditions when fed a diet supplemented with the probiotic Lactobacillus plantarum. Changes in the intestinal flora, haematological parameters and growth performance were assessed using 180 fishes (54.2 ± 13.4 g each). The fishes were subje
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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20. Removal of high-molecular weight polycyclic aromatic hydrocarbons
Alternatives for the removal of high-molecular weight polycyclic aromatic hydrocarbons (HWM-PAH) from soil were tested by adding fertilizer or glycerol, as well as the combination of both. Experiments were carried out for 60 days in reactors containing a HWM-PAH-contaminated soil (8030 μg kg-1), accompanied by pH monitoring, humidity control and quantificat
Química Nova. Publicado em: 2011
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21. Taxonomia de pracriontes isolados de cnidários de São Sebastião, SP, Brasil / Taxonomy of prokaryontes isolated from cnidarians of São Sebastião, SP, Brasil
Microorganisms have a key role in the health of cnidarians establishing ecologic relationships, of parasitism to mutualism. The knowledge on the diversity of prokaryotes associated with corals in Brazil is very limited. This is the first study on the taxonomic characterization of heterotrophic bacteria, including putative N2-fixing and specially vibrios isol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/04/2010
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22. Papel da alça microbiana na dinâmica trófica de um lago de várzea na Amazônia Central
During the hydrologic year of 2007-2008, the lago Catalão, a floodplain lake which is influenced by two of the worlds largest rivers (Solimões and Negro), was studied in terms of the dynamic of water column and the trophic dynamic of the microbial food web. At the beginning of the flood the lago Catalão is influenced by the rio Negro and at the end of thi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2010
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23. Bacterial community analysis of the water surface layer from a rice-planted and an unplanted flooded field
The bacterial communities in floodwater, from a rice-planted and an unplanted field were characterized at the beginning (flooding stage) and at the end (harvest stage) of the rice cropping cycle. Most probable number estimations and plate counts of aerobic and anaerobic heterotrophic bacteria and of several metabolic bacterial groups (methanogens, sulfate-re
Brazilian Journal of Microbiology. Publicado em: 2010-06
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24. Enumeration of heterotrophic bacteria in water for dialysis: comparison of the efficiency of Reasoner'2 agar and plate count agar
Due to the fact the incubation conditions may influence the microbiological evaluation of water for dialysis, the objective of the present study was the comparison of the efficiency of R2A and PCA media in the enumeration of heterotrophic bacteria in 193 samples of water collected in dialysis clinics from 12 cities in São Paulo, between October and December
Brazilian Journal of Microbiology. Publicado em: 2010-03