Rhamnolipids
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Electrolytic treatment and biosurfactants applied to the conservation of Eugenia uniflora fruit
Abstract Microorganisms are the primary responsible for food poisoning and food spoilage. The purpose of this study was to evaluate different fruit washing methods with tap water, electrolyzed water and rhamnolipids solution produced by Pseudomonas aeruginosa LBI, in order to inhibit microbial growth. The tested organism was Eugenia uniflora. The fruits were
Food Sci. Technol. Publicado em: 14/06/2016
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2. Biosurfactant production by
Pseudomonas aeruginosa in kefir and fish mealThe aim of this study was to increase rhamnolipid production by formulating media using kefir and fish meal for
Pseudomonas aeruginosa strains isolated from different environmental resources. The strains, named as H1, SY1, and ST1, capable of rhamnolipid production were isolated from soil contaminated with wastes originating from olive anBraz. J. Microbiol.. Publicado em: 2015-09
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3. Best conditions for biodegradation of diesel oil by chemometric tools
Diesel oil biodegradation by different bacteria-yeast-rhamnolipids consortia was tested. Chromatographic analysis of post-biodegradation residue was completed with chemometric tools (ANOVA, and a novel ranking procedure based on the sum of ranking differences). These tools were used in the selection of the most effective systems. The best results of aliphati
Braz. J. Microbiol.. Publicado em: 11/04/2014
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4. Biodegradação bacteriana de compostos organoclorados
Due to their recalcitrant nature, organochlorides are already found in environment and the search for alternatives to eliminate these compounds such as biodegradation using native microorganisms is of great interest. A screening trial to select environmental bacteria able to degrade DDD, PCP and dieldrin was conducted. Among 14 isolates, the soil bacteria Ps
Quím. Nova. Publicado em: 2014
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5. Avaliação da atividade antimicrobiana de ramnolipídeos sobre Listeria monocytogenes / Antimicrobial activity of rhamnolipids against Listeria monocytogenes
The rhamnolipids (RL) are biodegradable biosurfactants which have low toxicity and surface activity properties that can be useful for food processing industries. The objective of this study was to evaluate the susceptibility of Listeria monocytogenes with two rhamnolipids products: the rhamnolipid from P. aeruginosa LBI that was produced and purified in the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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6. Produção de ramnolipídios por isolados de Pseudomonas: avaliação do efeito das fontes de carbono e nitrogênio na composição do ramnolipídio. / Rhamnolipids production by Pseudomonas isolates: assessment of carbon and nitrogen sources effects on the rhamnolipids composition.
Ramnolipídios (RHLs) são biossurfactantes produzidos por Pseudomonas. O objetivo deste trabalho foi avaliar o potencial de produção de ramnolipídios por isolados de Pseudomonas considerando os efeitos das fontes de carbono ou nitrogênio tanto na concentração de ramnolipídios produzida como na composição deste. De 47 isolados bacterianos, cinco for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/02/2012
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7. Utilização de biosurfatantes no controle da adesão bacteriana e na remoção de biofilmes de patógenos alimentares em superfície de poliestireno / The use of biosurfactants to control bacterial dhesion and to remove biofilms of food -borne pathogens in polystyrene surface
Na natureza, os microorganismos podem apresentar forma de vida planctônica ou podem estar aderidos a superfícies formando comunidades conhecidas como biofilmes. A formação de biofilmes na indústria alimentícia é uma constante preocupação visto que os microorganismos aderidos podem causar contaminações persistentes, levando a deterioração do alim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2011
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8. Bioprospecção de microorganismos do gênero Pseudomonas produtores de biossurfactantes. / Bioprospection of biosurfactant producing microorganisms from the genera Pseudomonas.
Surfactantes de origem química e biológica são substâncias anfipáticas que se localizam em interfaces e diminuem a tensão intererficial. Este trabalho objetivou isolar microrganismos do gênero Pseudomonas, a partir de amostras ambientais; selecionar, dentre os isolados, aqueles que são capazes de produzir biossurfactante e caracterizar os biossurfact
Publicado em: 2008
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9. Hydrocarbon assimilation and biosurfactant production in Pseudomonas aeruginosa mutants.
We isolated transposon Tn5-GM-induced mutants of Pseudomonas aeruginosa PG201 that were unable to grow in minimal media containing hexadecane as a carbon source. Some of these mutants lacked extracellular rhamnolipids, as shown by measuring the surface and interfacial tensions of the cell culture supernatants. Furthermore, the concentrated culture media of t
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10. Simultaneous production of rhamnolipids, 2-alkyl-4-hydroxyquinolines, and phenazines by clinical isolates of Pseudomonas aeruginosa.
Of 72 clinical isolates of Pseudomonas aeruginosa examined for simultaneous production of secondary metabolites, 86% produced 2-alkyl-4-hydroxyquinolines, 75% produced rhamnolipids, and 58% produced phenazines, including pyocyanin. Whereas isolates producing two or one constituted smaller groups, 39% released all three metabolites. Metabolite production did
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11. Resident Parking Only: Rhamnolipids Maintain Fluid Channels in Biofilms†
American Society for Microbiology.
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12. Pseudomonas aeruginosa biosurfactant production in continuous culture with glucose as carbon source.
Rsan-ver, a strain of Pseudomonas aeruginosa isolated at this department, was used for the development of a continuous process for biosurfactant production. The active compounds were identified as rhamnolipids. A final medium for production was designed in continuous culture by means of medium shifts, since the formation of surface-active compounds was decis