Biosurfactants
Mostrando 13-24 de 91 artigos, teses e dissertações.
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13. Production and characterization of surface-active compounds from Gordonia amicalis
Two methods were used to make crude preparations of surface-active compounds (SACs) produced by Gordonia amicalis grown on the medium containing 1% diesel oil. Using a 2:1 (v/v) solution of chloroform:methanol for extraction, Type I SACs were isolated and shown to produce oil in water (O/W) emulsions. Type II SACs were isolated by precipitation with ammonium
Braz. arch. biol. technol.. Publicado em: 2014-02
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14. Antimicrobial activity of a biosurfactant produced by Bacillus licheniformis strain M104 grown on whey
The aim of the present study was to investigate the antimicrobial effect of the lipopeptide biosurfactants produced by Bacillus licheniformis strain M104 grown on whey. The biosurfactant was investigated for potential antimicrobial activity by using the disc-diffusion method against different Gram-positive bacteria {B subtilis, B. thuringiensis (two strains)
Braz. arch. biol. technol.. Publicado em: 2013-04
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15. Properties of a biosurfactant produced by Bacillus pumilus using vinasse and waste frying oil as alternative carbon sources
Biosurfactants are chemical molecules produced by the microorganisms with potential for application in various industrial and environmental sectors. The production parameters and the physicochemical properties of a biosurfactant synthesized by Bacillus pumilus using different concentrations of vinasse and waste frying oil as alternative carbon sources were a
Braz. arch. biol. technol.. Publicado em: 2013-02
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16. Biossurfactantes: propriedades anticorrosivas, antibiofilmes e antimicrobianas
Due to the importance of biofilms in the food industry, new products are being developed to enhance the efficiency of cleaning food-contact surfaces. Biosurfactants could be an alternative to synthetic products. The major advantages of biosurfactants over synthetic detergents are their low toxicity and highly biodegradable nature. Biosurfactants may also exh
Quím. Nova. Publicado em: 2013
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17. Produção de biossurfactantes por microrganismos isolados de solo contaminado com óleo diesel
The aim of this work was to produce biosurfactants through submerged fermentation using microorganisms isolated from soil contaminated with diesel. Microorganisms were isolated, characterized by the production of biosurfactants, and used to study the influence of type, induction and concentration of ammonium sulfate as a nitrogen source in the culture medium
Quím. Nova. Publicado em: 2013
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18. In situ biosurfactant production and hydrocarbon removal by Pseudomonas putida CB-100 in bioaugmented and biostimulated oil-contaminated soil
In situ biosurfactant (rhamnolipid) production by Pseudomonas putida CB-100 was achieved during a bioaugmented and biostimulated treatment to remove hydrocarbons from aged contaminated soil from oil well drilling operations. Rhamnolipid production and contaminant removal were determined for several treatments of irradiated and non-irradiated soils: nutrient
Braz. J. Microbiol.. Publicado em: 2013
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19. Produção de lipases e biossurfactantes por bactérias isoladas de um solo contaminado com óleo vegetal. / Production of lipases and biosurfactants by bacteria isolated from soil contaminated with residual vegetal oil.
As lipases e os biossurfactantes produzidos por microrganismos estão envolvidos no metabolismo de substratos oleosos e despertam grande interesse biotecnológico. Neste trabalho foi analisada a produção de lipases e biossurfactantes por bactérias isoladas de um solo utilizado para descarte do óleo vegetal residual. As 66 linhagens isoladas demonstraram
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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20. 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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21. 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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22. Biosurfactants production by yeasts using soybean oil and glycerol as low cost substrate
Biosurfactants are bioactive agents that can be produced by many different microorganisms. Among those, special attention is given to yeasts, since they can produce many types of biosurfactants in large scale, using several kinds of substrates, justifying its use for industrial production of those products. For this production to be economically viable, the
Brazilian Journal of Microbiology. Publicado em: 2012-03
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23. ESTUDO DA PRODUÇÃO DE BIOSSURFACTANTE UTILIZANDO RESÍDUOS AGROINDUSTRIAIS. / STUDY USING BIOSURFACTANT PRODUCTION AGROINDUSTRIAL RESIDUES.
Biossurfactantes são moléculas anfifílicas produzidas por microrganismos através da biodegradação de matérias-primas renováveis. Essas moléculas são capazes de reduzir a tensão superficial e interfacial em soluções aquosas e misturas de hidrocarbonetos. Os biossurfactantes possuem baixa toxicidade, biodegradabilidade, biodigestibilidade e divers
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2011
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24. 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