Quorum System
Mostrando 1-12 de 143 artigos, teses e dissertações.
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1. Anti-Quorum Sensing Potential of Antioxidant Quercetin and Resveratrol
ABSTRACT Quorum sensing system plays an active role in the regulation of pathogenicity of many microorganisms. Inhibition of pathogenicity or virulence factors will increase the success of treatment by preventing the development of antibiotic resistance. In this study, anti-quorum sensing activities of quercetin and resveratrol compounds, which have antioxid
Braz. arch. biol. technol.. Publicado em: 25/06/2018
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2. Microbial interactions: ecology in a molecular perspective
ABSTRACT The microorganism-microorganism or microorganism-host interactions are the key strategy to colonize and establish in a variety of different environments. These interactions involve all ecological aspects, including physiochemical changes, metabolite exchange, metabolite conversion, signaling, chemotaxis and genetic exchange resulting in genotype sel
Braz. J. Microbiol.. Publicado em: 2016-12
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3. 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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4. Composition, anti-quorum sensing and antimicrobial activity of essential oils from Lippia alba
Many Gram-negative pathogens have the ability to produce N-acylhomoserine lactones (AHLs) as signal molecules for quorum sensing (QS). This cell-cell communication system allows them to coordinate gene expression and regulate virulence. Strategies to inhibit QS are promising for the control of infectious diseases or antibiotic resistant bacterial pathogens.
Braz. J. Microbiol.. Publicado em: 2014-09
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5. Iron-depletion prevents biofilm formation in Pseudomonas aeruginosa through twitching motility and quorum sensing
Influence of iron-depletion on twitching motility and quorum sensing (QS) system in P. aeruginosa was evaluated. The results demonstrated iron-depletion can retard biofilm formation and increase the twitching motility and expression of QS-related genes, suggesting a potential interaction between twitching motility and QS system in P. aeruginosa biofilm forma
Brazilian Journal of Microbiology. Publicado em: 2010-03
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6. Análise da associação dos protocolos de roteamento AODV e DSR com o algoritmo Gossip, sistema de Quorum e com um novo algoritmo de economia de energia, PWSave. / Association analisys of the routing protocols AODV and DSR with Gossip, Quorum system and a new algorithm, PWSave.
This work studies the implementation of the Quorum system associated with the Gossip algorithm, the implementation of a new power saving algorithm - the PWSave - and the routing protocol AODV in a scenario with and without failures of an ad hoc network with mobility. It has been chosen to implement this work in an environment of simulation, because the mathe
Publicado em: 2009
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7. 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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8. O Acordo de Voto em Bloco introduzido pela Lei 10.303/01
The objective of this work is to demonstrate the introduction into the Brazilian legal system of the shareholders agreement to vote as a pool, through the coming into force of Law 10.303/01, which amended and included provisions in the Corporation Law, Law 6.404/76, and an explanation on its characteristics. The identification of this type of agreement was d
Publicado em: 2007
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9. THE DECISION-MAKING PROCESS IN THE MUNICIPAL HEALTH COUNCIL OF ITAJAÍ/SC / O PROCESSO DECISÓRIO NO CONSELHO MUNICIPAL DE SAÚDE DE ITAJAÍ/SC
The last two decades have been marked by transformations in the Brazilian health system, related to changes in the political and institutional spheres. The New Constitution of Brazil, in 1988, incorporated the main proposals of the 8th National Health Conference in 1986, creating the Sistema Único de Saúde (SUS) the Brazilian national health system which w
Publicado em: 2006
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10. Identification, Timing, and Signal Specificity of Pseudomonas aeruginosa Quorum-Controlled Genes: a Transcriptome Analysis†
There are two interrelated acyl-homoserine lactone quorum-sensing-signaling systems in Pseudomonas aeruginosa. These systems, the LasR-LasI system and the RhlR-RhlI system, are global regulators of gene expression. We performed a transcriptome analysis to identify quorum-sensing-controlled genes and to better understand quorum-sensing control of P. aeruginos
American Society for Microbiology.
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11. The LuxR Homolog ExpR, in Combination with the Sin Quorum Sensing System, Plays a Central Role in Sinorhizobium meliloti Gene Expression†
Quorum sensing, a population density-dependent mechanism for bacterial communication and gene regulation, plays a crucial role in the symbiosis between alfalfa and its symbiont Sinorhizobium meliloti. The Sin system, one of three quorum sensing systems present in S. meliloti, controls the production of the symbiotically active exopolysaccharide EPS II. Based
American Society for Microbiology.
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12. Quorum Sensing Regulates Type III Secretion in Vibrio harveyi and Vibrio parahaemolyticus
In a process known as quorum sensing, bacteria communicate with one another by producing, releasing, detecting, and responding to signal molecules called autoinducers. Vibrio harveyi, a marine pathogen, uses two parallel quorum-sensing circuits, each consisting of an autoinducer-sensor pair, to control the expression of genes required for bioluminescence and
American Society for Microbiology.