Swarming
Mostrando 1-12 de 156 artigos, teses e dissertações.
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1. Metapolybia araujoi, a new species of swarming social wasp from the Brazilian Amazon rainforest (Vespidae: Polistinae)
Abstract A new species of Metapolybia, collected in Pará State, Brazil, by Adolph Ducke, in 1902, is described and comparative remarks are given.
Rev. Bras. entomol.. Publicado em: 2018-06
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2. Anti-quorum sensing activity of phenolic extract from Eugenia brasiliensis (Brazilian cherry)
Abstract The aim of this study was to assess the anti-quorum sensing activity of phenolic extracts from grumixama (Eugenia brasiliensis), also known as Brazilian cherry, in concentrations that did not interfere with bacterial growth. The pulp phenolic compounds were extracted by using solid phage extraction in a mini-collumn C18 and quantified by spectrophot
Food Sci. Technol. Publicado em: 29/04/2016
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3. Antibacterial, anti-swarming and anti-biofilm formation activities of Chamaemelum nobile against Pseudomonas aeruginosa
AbstractINTRODUCTION:Chamomile ( Chamaemelum nobile ) is widely used throughout the world, and has anti-inflammatory, deodorant, bacteriostatic, antimicrobial, carminative, sedative, antiseptic, anti-catarrhal, and spasmolytic properties. Because of the increasing incidence of drug-resistant bacteria, the development of natural antibacterial sources such as
Rev. Soc. Bras. Med. Trop.. Publicado em: 2015-08
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4. Lack of AHL-based quorum sensing in Pseudomonas fluorescens isolated from milk
Numerous bacteria coordinate gene expression in response to small signalling molecules in many cases known as acylhomoserine lactones (AHLs), which accumulate as a function of cell density in a process known as quorum sensing. This work aimed to determine if phenotypes that are important to define microbial activity in foods such as biofilm formation, swarmi
Braz. J. Microbiol.. Publicado em: 2014-09
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5. Fish swarm optimization algorithm applied to engineering system design
Nowadays, optimization techniques based on the analogy with swarming principles and collective activities of social species in nature have been used in the development of methodologies for solving a variety of real-world optimization problems. In this context, the social behavior of fish colonies has been recently explored to develop a novel algorithm, the s
Lat. Am. j. solids struct.. Publicado em: 2014-01
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6. Relationship among Apis mellifera L. stings, swarming and climate conditions in the city of Rio Claro, SP, Brazil
The presence of bees (Apis mellifera L.) in urban areas has increased in recent years due to environmental disturbances caused by humans. Bee migration to cities may provoke serious accidents, since some people present allergic reactions to their venoms. In Rio Claro city, São Paulo state, Brazil, the number of calls to the fire brigade for removal of bee s
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2010
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7. Role of the polar and a lateral flagella in Aeromonas caviae strains in the biofilm formation and cellular adherence / Papel dos flagelos polar e lateral em cepas de Aeromonas caviae na formação de biofilme e aderência celular
Aeromonas spp. são bactérias Gram negativas capazes de causar doenças intestinais e extra-intestinais. A virulência de algumas espécies do gênero já foi associada a diversos fatores, como a expressão de flagelos e conseqüente mobilidade bacteriana. Aeromonas caviae apresenta dois distintos sistemas flagelares, um deles responsável pela natação em
Publicado em: 2009
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8. Abordagem biotecnológica em Proteus mirabilis
O gênero Proteus é caracterizado pela rápida mobilidade, fenômeno denominado swarming. Quanto à homologia de seu DNA, apresenta apenas uma discreta relação com o da Escherichia coli. Freqüentemente relacionado com infecções urinárias, facilitadas pela sua capacidade em degradar uréia, tem sido encontrado colonizando cateteres e sondas vesicais, p
Publicado em: 2008
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9. Effect of PvrR and RcsB response regulators in motility, biofilm formation and their connection with Pseudomonas aeruginosa PA14 CupD fimbria / Efeito dos reguladores de resposta PvrR e RcsB na motilidade, formação de biofilme e sua relação com a fímbria CupD de Pseudomonas aeruginosa PA14
Pseudomonas aeruginosa is a γ-proteobacteria that can behave as an opportunistic pathogen. The strain PA14 carries two pathogenicity islands, the largest of them, PAPI-1, contains two gene clusters between two direct repeat sequences that are transcribed in opposite directions and are involved in virulence. The first group consists of four genes arrange
Publicado em: 2008
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10. The organization and rhythm in the foraging and swarming of Plebeia remota (Holmberg, 1903) (Hymenoptera, Apidae, Meliponini) / A organização e a ritmicidade no forrageamento e na enxameação de Plebeia remota (Holmberg, 1903) (Hymenoptera, Apidae, Meliponini)
The meliponine are bees that occur in the tropical and subtropical regions of the Earth. In this moment that the global changes attract so much scientific interest, we consider opportune the detailed study of the social organization of Plebeia remota, a bee species that present reproductive diapause in autumn and winter. Although other researches had been ma
Publicado em: 2007
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11. Características fenotípicas de Enterobacter cloacae controladas pelo sistema quorum sensing / Phenotypics characteristics by Enterobacter cloacae controlled for the system quorum sensing
Many bacteria present an elaborate system of communication dependent of cell density known as quorum sensing, and the knowledge of the phenotypes controlled by this mechanism may contribute for the elucidation of important processes in food microbiology. The objective of this study was to determine phenotypes regulated by quorum sensing in Enterobacter cloac
Publicado em: 2007
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12. A behavioral account on the social organization and swarming of Parachartergus fraternus (Hymenopetra: Polistinae, Epiponini). / Análise dos comportamentos envolvidos na organização social e no processo de enxameio de Parachartergus fraternus (Hymenoptera, Polistinae, Epiponini).
A fundação por enxameamento e poliginia (múltiplas rainhas funcionais) são características marcantes nas vespas da tribo Epiponini, dominantes na região Neotropical. A diversidade na diferenciação entre castas no grupo é interessante. É evidente a distinção entre rainhas e operárias nos gêneros basais, contrastando com a presença de intermedi�
Publicado em: 2005