Planktonic Environment
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Composition, abundance, and diversity of limnetic cladocerans (Crustacea: Anomopoda and Ctenopoda) in a black-water lake in the Negro River basin, Amazonas State, Brazil
Abstract For the past 10 years, studies have contributed greatly to knowledge regarding the composition and distribution of the planktonic cladocerans of Tupé Lake in Amazonas State, Brazil, but comparisons between these studies have not been made, and this would increase the comprehension of the ecology of these organisms and their environment. Periodicall
Nauplius. Publicado em: 13/09/2018
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2. Evaluation antibacterial and antibiofilm activity of the antimicrobial peptide P34 against Staphylococcus aureus and Enterococcus faecalis
ABSTRACT The adhesion ability of bacteria to abiotic surfaces has important implications in food industries, because these organisms can survive for long periods through the biofilm formation. They can be transferred from one place to another in the industry causing contamination of the food processing environment. In this study, the antibacterial and antibi
An. Acad. Bras. Ciênc.. Publicado em: 01/02/2018
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3. Farnesol in combination with N-acetylcysteine against Staphylococcus epidermidis planktonic and biofilm cells
Staphylococcus epidermidis is the most frequent cause of nosocomial sepsis and catheter-related infections, in which biofilm formation is considered to be the main virulence mechanism. In biofilm environment, microbes exhibit enhanced resistance to antimicrobial agents. This fact boosted the search of possible alternatives to antibiotics. Farnesol and N-acet
Brazilian Journal of Microbiology. Publicado em: 2012-03
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4. Planktonic diatoms in lotic and lentic environments in the Lago dos Tigres hydrologic system (Britânia, Goiás, Brazil): Coscinodiscophyceae and Fragilariophyceae
A floristic study of Coscinodiscophyceae and Fragilariophyceae in the Lago dos Tigres hydrologic system is presented. Phytoplankton samples were collected with a plankton net (25 µm mesh) at 11 sampling stations, three in lotic areas and eight in lacustrine zones. Eleven species of Coscinodiscophyceae and eight of Fragilariophyceae were identified; descript
Braz. J. Bot.. Publicado em: 2012
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5. Comunidades de hidrozoários (Cnidaria) estuarinos do sudeste e sul do Brasil / Communities of stuarine hydrozoans (Cnidaria) from south and southeast of Brazil
The majority of the hydrozoans is marine, but they are also often recorded in estuaries. This environment is considered one of the most important in number of biological invasions. The Brazilian brackish hydrozoan fauna is practically unknown, except for some scattered records. The goals of this study are (1) to survey the planktonic and benthic hydrozoans f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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6. Transposição e fragmentação do Rio Piumhi (Bacia do Rio São Francisco, MG): variáveis limnológicas e microcrustáceos zooplanctônicos da Lagoa dos Tropeiros
The aim of this study was to analyse the physical and chemical characteristics of Tropeiros Lake (Capitólio, MG), located in Piumhi river sub‐basin, a river diverted from the Rio Grande basin to the são Francisco River basin, and to analize the taxonomic composition, abundance, diversity and the size structure of the planktonic microcrustaceans. Phys
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2011
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7. Streptococcus mutans e cárie dentária: estudos sobre a perspectiva de identificação de pacientes de risco à cárie e potencial da clorexidina como agente antimicrobiano bucal
Streptococcus mutans é o principal agente etiológico da cárie dentária, especialmente devido à sua habilidade de adesão à superfície dentária. Esta bactéria produz glicosiltransferases, que sintetizam polímeros de glicano solúveis e insolúveis a partir da sacarose, que aumentam a colonização de bactérias cariogênicas e promovem a formação
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/12/2010
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8. Ecology of zooplanktonic communities associated with palm swamp ponds in Uberlândia, MG / Ecologia de comunidades zooplanctônicas em lagoas associadas a veredas no município de Uberlândia, MG
Ponds of veredas, a palm swamp environment associated with headwaters, appears among the most important continental aquatic habitats on the planet. In these ponds, banks of macrophytes occurs with frequency, maintaining the aquatic productivity and the increase of habitat heterogeneity, thereby generating great biological diversity in their environment. One
Publicado em: 2008
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9. Contributions to South Atlantic paleoceanography in the last 25,000 years: evidence from calcareous nannofossils from northeastern brazilian slope / Nanofósseis calcários da margem continental nordeste do Brasil: uma contribuição à paleoceanografia do Atlântico Sul nos últimos 25.000 anos
This study focuses on changes in calcareous nannofossil assemblages as an evidence of paleoceanographic variability during the last 25,000 years in two deep sea piston cores from the northeastern Brazilian continental margin. To support reconstructing ancient marine environment others proxies have been applied along with the calcareous nannofossil analysis:
Publicado em: 2007
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10. Estudo da comunidade fitoplanctônica como bioindicador de poluição em três reservatórios em série do Parque Estadual das Fontes do Ipiranga (PEFI), São Paulo, SP / Phytoplankton communitys study as bioindicator of pollution in three cascading reservoir system in Parque Estadual das Fontes do Ipiranga (PEFI), São Paulo, SP
The three shallow cascading reservoir system are located in Parque Estadual das Fontes do Ipiranga (PEFI) Biological Reserve in the southern of São Paulo city where located headwater Ipiranga Stream. The first reservoir is linked to Lago das Garças, a shallow and eutrophic environment, where have become frequent blooms of Cyanobacteria that produce aggress
Publicado em: 2007
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11. VariaÃÃo espacial e temporal da comunidade microfitoplÃnctÃnica em ecossistemas costeiros localizados no litoral sul de Pernambuco, Nordeste do Brasil
The coastal marine environment shows a strong ocean- continent-atmosphere interaction and for that reason is considered extremely complex from the biological point of view due to the influence of many systems, so it can be characterized as one of the most fertile and dynamic of the hydrosphere. The estuarine complex (Ilhetas and Mamucaba rivers) and the Tama
Publicado em: 2005
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12. Oceanographical Geoquinica of sedimentary carbonates of the continental platform of the state of the Cearà and implications / Geoquimica de carbonatos sedimentares da plataforma continental do estado do Cearà e implicaÃÃes oceanogrÃficas
Eight foraminÃfera-rich sediment samples of the continental margin of Brazil, between the states of Cearà and Pernambuco and single foraminifera specimens (Amphistegina radiata, Peneropolis planatus and Globigenrinoides rubbe) of fifty sediment samples collected in the continental margin of the Ceara State were analysed for C and O- isotope. The objective
Publicado em: 2004