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Registros recuperados: 7
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Biosurfactants production by yeasts using soybean oil and glycerol as low cost substrate BJM
Accorsini,Fábio Raphael; Mutton,Márcia Justino Rossini; Lemos,Eliana Gertrudes Macedo; Benincasa,Maria.
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 use of residual carbon sources is recommended. The present study isolated yeasts from soil contaminated with petroleum oil hydrocarbons and assessed their capacity for producing biosurfactants in low cost substrates. From a microbial consortium enriched, seven yeasts were isolated, all showing potential for producing biosurfactants in soybean oil. The isolate LBPF 3, characterized as Candida antarctica,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Yeast; Biosurfactants; Glycerol; Soybean oil.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100013
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Ecology and biotechnological potential of bacterial community from three marine sponges of the coast of Rio de Janeiro, Brazil Anais da ABC (AABC)
ARAÚJO,FÁBIO V. DE; NETTO,MARCELLE C.M.; AZEVEDO,GUSTAVO P.; JAYME,MARCELLY M.A.; NUNES-CARVALHO,MONICA C.; SILVA,MARIANA M.; CARMO,FLÁVIA L. DO.
ABSTRACT Marine sponges has been a large reservoir of microbial diversity, with the presence of many species specific populations as well as producing biologically active compounds, which has attracted great biotechnological interest. In order to verify the influence of the environment in the composition of the bacterial community present in marine sponges and biotechnological potential of bacteria isolated from these organisms, three species of sponges and the waters surrounding them were collected in different beaches of Rio de Janeiro, Brazil. The profile of the bacterial community present in sponges and water was obtained by PCR-DGGE technique and the biotechnological potential of the strains isolated by producing amylase, cellulase, protease and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial diversity; Biosurfactants; Enzymes; Marine sponges; PCR-DGGE..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602785
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Reducing COD level on oily effluent by utilizing biosurfactant-producing bacteria BABT
Jacobucci,Daniela Franco Carvalho; Oriani,Maria Raquel de Godoy; Durrant,Lucia Regina.
Two bacteria isolated from crude oil contaminated soil, Pantoea agglomerans and Planococcus citreus, produced biosurfactants utilizing 1.5% of kerosene and olive oil as the sole carbon sources, respectively. The bacteria and the biosurfactants produced were introduced to oily effluent, arising from margarine and soap industry. Emulsification activities were determined by increases in the absorbance of the oil-in-water emulsions at 610 nm, whereas the water-in-oil emulsions were expressed as the height (cm) of the emulsion layers formed. The 72 h incubation experiment resulted in a COD (Chemical Oxygen Demand) reduction of 76% with Planococcus citreus strain and 70% with Pantoea agglomerans.The COD reduction with bacterial biosurfactants was over 50% in 24...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactants; Bacteria; COD; Oily effluent; Bioremediation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400029
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Bacteria with capacities of production of biosurfactants isolated from native plants of Baja California, México Phyton
Méndez-Trujillo,V; Carrillo-Beltrán,M; Valdez-Salas,B; Gonzalez-Mendoza,D.
The aim of the present study was to isolate autochthonous microorganisms with biosurfactants capacities from the rhizospere of the cotton (Gossypium spp.), cachanilla (Pluchea sericea) and salicornia (Salicornia bigelovii) in the Mexicali valley. The biosurfactant activity and biosurfactant productions by the strains isolated from the rhizosphere of the cotton (Bs-Alg), cachanilla (Bs-Cach) and salicornia (Bs-Cach01) were determined using oil spreading technique and emulsifcation activity with corn, olive, soybean and diesel oils, respectively. The analysis of the 16S rRNA showed that strains Bs-Alg, Bs-Cach and Bs-Cach01 are closely related among them and with respect to all Bacillus subtilis with more than 99% similarity values. Results showed that all...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mexicali valley; Biosurfactants; Bacillus subtilis; Native plants.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200008
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Properties of a biosurfactant produced by Bacillus pumilus using vinasse and waste frying oil as alternative carbon sources BABT
Oliveira,Juliana Guerra de; Garcia-Cruz,Crispin Humberto.
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 analyzed. The microorganism was able to grow and produce a biosurfactant using both the residues. The surface tension was reduced up to 45 mN/m and the maximum production of crude biosurfactant was 27.7 and 5.7 g/l for vinasse and waste frying oil, respectively, in concentration of 5%. The critical micelle concentration (CMC) results of 1.5 and 0.2 g/l showed the efficiency of the biosurfactant produced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactants; Vinasse; Waste frying oil; Bacillus pumilus.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000100020
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Molecular analysis of the bacterial diversity in a specialized consortium for diesel oil degradation Rev. Bras. Ciênc. Solo
Paixão,Douglas Antonio Alvaredo; Dimitrov,Mauricio Rocha; Pereira,Rodrigo Matheus; Accorsini,Fábio Raphael; Vidotti,Maria Benincasa; Lemos,Eliana Gertrudes de Macedo.
Diesel oil is a compound derived from petroleum, consisting primarily of hydrocarbons. Poor conditions in transportation and storage of this product can contribute significantly to accidental spills causing serious ecological problems in soil and water and affecting the diversity of the microbial environment. The cloning and sequencing of the 16S rRNA gene is one of the molecular techniques that allows estimation and comparison of the microbial diversity in different environmental samples. The aim of this work was to estimate the diversity of microorganisms from the Bacteria domain in a consortium specialized in diesel oil degradation through partial sequencing of the 16S rRNA gene. After the extraction of DNA metagenomics, the material was amplified by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: PCR; Cloning; 16S rRNA; Metagenomics; Soil; Biosurfactants.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300019
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Selection of biosurfactan/bioemulsifier-producing bacteria from hydrocarbon-contaminated soil BJM
Viramontes-Ramos,Sabina; Portillo-Ruiz,Martha Cristina; Ballinas-Casarrubias,María de Lourdes; Torres-Muñoz,José Vinicio; Rivera-Chavira,Blanca Estela; Nevárez-Moorillón,Guadalupe Virginia.
Petroleum-derived hydrocarbons are among the most persistent soil contaminants, and some hydrocarbon-degrading microorganisms can produce biosurfactants to increase bioavailability and degradation. The aim of this work was to identify biosurfactant-producing bacterial strains isolated from hydrocarbon-contaminated sites, and to evaluate their biosurfactant properties. The drop-collapse method and minimal agar added with a layer of combustoleo were used for screening, and positive strains were grown in liquid medium, and surface tension and emulsification index were determined in cell-free supernantant and cell suspension. A total of 324 bacterial strains were tested, and 17 were positive for the drop-collapse and hydrocarbon-layer agar methods. Most of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactants; Bioemulsifiers; Soil microbiota; Hydrocarbon contamination.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300017
Registros recuperados: 7
Primeira ... 1 ... Última
 

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