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A new biosurfactant produced by Candida glabrata UCP 1002: characteristics of stability and application in oil recovery BABT
Luna,Juliana Moura de; Sarubbo,Leonie; Campos-Takaki,Galba Maria de.
The production of a new biosurfactant by Candida glabrata UCP1002 was studied to evaluate the influence of the concentration of the cotton seed oil, glucose and yeast extract. The dynamics of the growth and surfactant production were showed for all the cultivation conditions studied. The best emulsification of the n-hexadecane, quantified by the emulsifying index was observed in the medium containing 7.5% cotton seed oil, 5% glucose and 0.3% yeast extract. The isolated biosurfactant showed a CMC of 2.5% and the surface tension at that point showed to be 31mN/m. The potential application of the biosurfactant in oil recovery from the sand, in acid and alkaline environments and over exposure to high salinity and different temperatures was demonstrated by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Candida glabrata; Surface tension; Stability; Cotton seed oil; Oil removal.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400001
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Antimicrobial activity of a biosurfactant produced by Bacillus licheniformis strain M104 grown on whey BABT
Gomaa,Eman Zakaria.
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), B. cereus, Staphylococcus aureus (two strains) and Listeria monocytogenes)}, Gram-negative bacteria {(Pseudomonas aeruginosa, Escherichia coli (two strains), Salmonella typhimurium, Proteous vulgaris and Klebsiella pneumoniae) and a yeast (Candida albicans)}. The biosurfactant showed profoundly distinct antibacterial activity toward tested bacteria and displayed an antifungal activity against the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Bacillus licheniformis; Cheese whey; Antimicrobial activity; Staphylococcus aureus.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200011
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Antimicrobial activity of surfactants produced by Bacillus subtilis R14 against multidrug-resistant bacteria BJM
Fernandes,Paulo André Vicente; Arruda,Isabel Renata de; Santos,Antônio Fernando Amatto Botelho dos; Araújo,Ana Albertina de; Maior,Ana Maria Souto; Ximenes,Eulália Azevedo.
Lipopeptides represent a class of microbial surfactants with increasing scientific, therapeutic and biotechnological interests. The genus Bacillus is a producer of these active compounds, and among them B. subtilis produces surfactin, the most potent biosurfactant known. These compounds can act as antibiotics, antivirals, antitumorals, immunomodulators and enzyme inhibitors. In this work, the antimicrobial activity of biosurfactants obtained by cultivation of B. subtilis R14 was investigated against multidrug-resistant bacteria. During cultivation in defined medium, the surface tension of the medium was reduced from 54 mN/m in the beginning of the microbial growth to 30 mN/m after 20 hours. A crude surfactant concentration of 2.0 g/L was obtained after 40...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Bacillus subtilis; Lipopeptides; Antimicrobial activity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400022
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Assessment of toxicity of a biosurfactant from Candida sphaerica UCP 0995 cultivated with industrial residues in a bioreactor Electron. J. Biotechnol.
Bezerra de Souza Sobrinho,Humberto; de Luna,Juliana Moura; Rufino,Raquel Diniz; Figueiredo Porto,Ana Lúcia; Sarubbo,Leonie Asfora.
Background: The aim of the present study was to propose a low-cost method for the production of a biosurfactant by the yeast Candida sphaerica and assess its toxicity and phytotoxicity. The medium was formulated with distilled water supplemented with residue from a soy oil refinery (5%) and corn steep liquor (2.5%) as substrates. These two products were the sources of carbon and nitrogen as well as mineral elements to encourage the growth of the microorganism and production of a biosurfactant. Results: The isolated biosurfactant yield was 6.364 g/l. The biosurfactant exhibited an excellent ability to reduce surface tension (26 mN/m) and demonstrated no toxicity against seeds of Brassica oleracea, Chicoria intybus and Solanum gilo or the micro crustacean...
Tipo: Journal article Palavras-chave: Biosurfactant; Bioreactor; Candida sphaerica; Industrial residues; Toxicity.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400004
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Biosurfactant production by Pseudomonas aeruginosain kefir and fish meal BJM
Kaskatepe,Banu; Yildiz,Sulhiye; Gumustas,Mehmet; Ozkan,Sibel A..
The 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 and fish oil factories. Additionally, P. aeruginosa ATCC 9027 strain, which is known as rhamnolipid producer, was included in the study. Initially, rhamnolipid production by the strains was determined in Mineral Salt Medium (MSM) and then in media prepared by using kefir and fish meal. The obtained rhamnolipids were purified and quantified according to Dubois et al. (1956). The quantity of rhamnolipids of ATCC, H1 and SY1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Pseudomonas aeruginosa; Rhamnolipid; Kefir; Fish meal.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300855
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Characterization and properties of the biosurfactant produced by Candida lipolytica UCP 0988 Electron. J. Biotechnol.
Diniz Rufino,Raquel; Moura de Luna,Juliana; de Campos Takaki,Galba Maria; Asfora Sarubbo,Leonie.
Background: Biotechnological processes are costly, especially for the production of biosurfactants. The successful production of a biosurfactant is dependent on the development of processes using low cost raw materials. Considering the importance of the characteristics of a biosurfactant to facilitate its industrial application, the properties of the biosurfactant produced by Candida lipolytica through previously optimized medium have been established. Results: The yeast was grown for 72 h to determine the kinetics of growth and production. The surface tension of the cell-free broth was reduced from 55 to 25 mN/m. The yield of biosurfactant was 8.0 g/l with a CMC of 0.03%. The biosurfactant was characterized as an anionic lipopeptide composed of 50%...
Tipo: Journal article Palavras-chave: Biosurfactant; Candida lipolytica; Lipopeptide; Surface tension; Toxicity.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000100006
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Characterization of dioxygenases and biosurfactants produced by crude oil degrading soil bacteria BJM
Muthukamalam,Santhakumar; Sivagangavathi,Sivalingam; Dhrishya,Dharmapal; Sudha Rani,Sadras.
ABSTRACT Role of microbes in bioremediation of oil spills has become inevitable owing to their eco friendly nature. This study focused on the isolation and characterization of bacterial strains with superior oil degrading potential from crude-oil contaminated soil. Three such bacterial strains were selected and subsequently identified by 16S rRNA gene sequence analysis as Corynebacterium aurimucosum, Acinetobacter baumannii and Microbacterium hydrocarbonoxydans respectively. The specific activity of catechol 1,2 dioxygenase (C12O) and catechol 2,3 dioxygenase (C23O) was determined in these three strains wherein the activity of C12O was more than that of C23O. Among the three strains, Microbacterium hydrocarbonoxydans exhibited superior crude oil degrading...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crude oil; Biodegradation; Bacteria; Catechol dioxygenase; Biosurfactant.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400637
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Crude glycerol from biodiesel industry as substrate for biosurfactant production by Bacillus subtilis ATCC 6633 BABT
Sousa,Marylane de; Dantas,Iuri Torquato; Felix,Anne Kamilly Nogueira; Sant'Ana,Hosiberto Batista de; Melo,Vânia Maria Maciel; Gonçalves,Luciana Rocha Barros.
Glycerol, a co-product of the biodiesel industry, may be a suitable raw material for the production of high added-value compounds by the microorganisms. This study aimed to use the glycerol obtained from the biodiesel production process as the main carbon source for biosurfactant production by Bacillus subtilis ATCC 6633. Results indicated that the strain lowered the surface tension of the cell-free fermented broth to 31.5 ± 1.6 mN/m, indicating the production of biosurfactant. The critical micelle concentration (CMC = 33.6 mN/m) obtained was similar to the previously reported for biossurfactants isolated from other Bacillus. The produced biosurfactant was able to emulsify n-hexadecane and soybean oil.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Biodiesel; Glycerol and Surfactin.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200019
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Evaluation of a lipopeptide biosurfactant from Bacillus natto TK-1 as a potential source of anti-adhesive, antimicrobial and antitumor activities BJM
Cao,Xiao-Hong; Liao,Zhen-Yu; Wang,Chun-Ling; Yang,Wen-Yan; Lu,Mei-Fang.
A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose- dependent manner.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Anti-adhesive; Antimicrobial activity; Antitumor.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200030
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Evaluation of emulsifier stability of biosurfactant produced by Saccharomyces lipolytica CCT-0913 BABT
Lima,Álvaro Silva; Alegre,Ranulfo Monte.
Surface-active compounds of biological origin are widely used for many industries (cosmetic, food, petrochemical). The Saccharomyces lipolytica CCT-0913 was able to grow and produce a biosurfactant on 5% (v/v) diesel-oil at pH 5.0 and 32ºC. The cell-free broth emulsified and stabilized the oil-in-water emulsion through a first order kinetics. The results showed that the initial pH value and temperature influenced the emulsifier stability (ES), which was the time when oil was separated. The biosurfactant presented different stabilization properties for vegetable and mineral oil in water solution, despite the highest values of the ES occurring with vegetable oil. The biosurfactant presented smallest ES when compared to commercial surfactants; however, this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Emulsifier stability; Fermentation; Vegetable oil; Diesel oil.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200004
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Lactobacillus acidophilus-derived biosurfactant effect on gtfB and gtfC expression level in Streptococcus mutans biofilm cells BJM
Tahmourespour,Arezoo; Salehi,Rasoul; Kermanshahi,Rooha Kasra.
Streptococcus mutans (S. mutans), harboring biofilm formation, considered as a main aetiological factor of dental caries. Gtf genes play an important role in S. mutans biofilm formation. The purpose of this study was to investigate the effect of Lactobacillus acidophilus-derived biosurfactant on S. mutans biofilm formation and gtfB/C expression level (S. mutans standard strain ATCC35668 and isolated S. mutans strain (22) from dental plaque). The Lactobacillus acidophilus (L. acidophilus) DSM 20079 was selected as a probiotic strain to produce biosurfactant. The FTIR analysis of its biosurfactant showed that it appears to have a protein-like component. Due to the release of such biosurfactants, L. acidophilus was able to interfere in the adhesion and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biofilm formation; Biosurfactant; GtfB/C; Lactobacillus acidophilus; Real-time RT PCR; Streptococcus mutans.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100042
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Lipopeptide production by Bacillus subtilis R1 and its possible applications BJM
Jha,Sujata S.; Joshi,Sanket J.; S.J.,Geetha.
Abstract The possible application of a bacterial strain - Bacillus subtilis R1, isolated from an oil contaminated desert site in India, as biocontrol agent and its biosurfactant in microbial enhanced oil recovery are discussed. The biosurfactant production in minimal medium was carried out at different temperatures and salt concentrations, where it produced an efficient biosurfactant at 30-45 °C and in presence of up to 7% salt. It significantly reduced the surface tension from 66 ± 1.25 mN/m to 29 ± 0.85 mN/m within 24 h. In order to enhance the biosurfactant production, random mutagenesis of B. subtilis R1 was performed using chemical mutagen - ethyl methanesulfonate. Majority of the isolated 42 mutants showed biosurfactant production, but the difference...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacillus subtilis; Biosurfactant; Ethyl methanesulfonate; Microbial enhanced oil recovery; Antifungal activity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400955
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Mass spectrometry analysis of surface tension reducing substances produced by a pah-degrading Pseudomonas citronellolis strain BJM
Jacques,Rodrigo J. S.; Santos,Eder C.; Haddad,Renato; Catharino,Rodrigo R.; Eberlin,Marcos N.; Bento,Fátima M.; Camargo,Flávio A. de Oliveira.
In this work we investigated the structure of the iron-stimulated surface tension reducing substances produced by P. citronellolis 222A isolated from a 17-years old landfarming used for sludge treatment in petrochemical industries and oil refinery. Its mass spectrum differs from P. aeruginosa spectrum, indicating that the surface tension reducing substances produced by P. citronellolis can be a new kind of biosurfactant.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudomonas aeruginosa; Rhamnolipid mixture; ESI mass spectrum; Biosurfactant.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000200028
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Production and characterization of a biosurfactant produced by Streptomyces sp. DPUA 1559 isolated from lichens of the Amazon region BJMBR
Santos,A.P.P.; Silva,M.D.S.; Costa,E.V.L.; Rufino,R.D.; Santos,V.A.; Ramos,C.S.; Sarubbo,L.A.; Porto,A.L.F..
Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of the Amazon region. The microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. The kinetics of biosurfactant production was accompanied by reducing the surface tension of the culture medium from 60 to values around 27.14 mN/m, and by the emulsification index, which showed the efficiency of the biosurfactant as an emulsifier of hydrophobic compounds....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Surface tension; Emulsification; Streptomyces; Soybean frying oil.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000200606
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Production and characterization of surface-active compounds from Gordonia amicalis BABT
Jackisch-Matsuura,Ani Beatriz; Santos,Leonardo Silva; Eberlin,Marcos Nogueira; Faria,Andréia Fonseca de; Matsuura,Takeshi; Grossman,Matthew James; Durrant,Lucia Regina.
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 sulfate and produced predominantly water in oil emulsions (W/O). The crude Type I and II preparations were able to produce a significant reduction in the surface tension of water; however, the crude Type II preparation had 10-25 fold higher emulsification activity than the Type I preparation. Both SAC preparations were analyzed by the TLC and each produced two distinct bands with Rf 0.44 and 0.62 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioemulsifier; Bioremediation; Biosurfactant; Gordonia amicalis; Industrial chemicals; Microbial surfactant production.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100019
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Production and stability studies of the bioemulsifier obtained from a new strain of Candida glabrata UCP 1002 Electron. J. Biotechnol.
Asfora Sarubbo,Leonie; Moura de Luna,Juliana; de Campos-Takaki,Galba Maria.
Evaluation of both tenso-active and emulsifying activities indicated that a biosurfactant was produced by the newly isolated and promising strain Candida glabrata isolated from mangrove sediments. The extracellular water-soluble emulsifying agent was isolated and identified as a heteropolymer. The maximum of bioemulsifier production was observed when the strain was grown on soluble and insoluble substrates cotton seed oil plus glucose, reaching values of 10.0 g/l after 144 hrs at 200 rpm. The cell-free culture broth containing the examined agent lowered the surface tension of the medium to 31 mN/m. Stable and compact emulsions with emulsifying activity of 75% of cotton seed oil were detected. The emulsification capacity remained practically unaltered...
Tipo: Journal article Palavras-chave: Biosurfactant; Candida; Emulsifier; Fermentation; Glucose; Vegetal oil.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400008
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Production of biosurfactant by hydrocarbon degrading Rhodococcus ruber and Rhodococcus erythropolis Rev. Microbiol.
Bicca,Flávio Correa; Fleck,Leonardo Colombo; Ayub,Marco Antônio Záchia.
There is world wide concern about the liberation of hydrocarbons in the environment, both from industrial activities and from accidental spills of oil and oilrelated compounds. Biosurfactants, which are natural emulsifiers of hydrocarbons, are produced by some bacteria, fungi and yeast. They are polymers, totally or partially extracellular, with an amphipathyc structure, which allows them to form micelles that accumulate at the interface between liquids of different polarities such as water and oil. This process is based upon the ability of biosurfactants to reduce surface tension, blocking the formation of hydrogen bridges and certain hydrophilic and hydrophobic interactions. The ability of biosurfactant production by five strains of Rhodococcus isolated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Hydrocarbon degradation; Rhodococcus sp.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300008
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Rhamnolipid Biosurfactants Produced by Pseudomonas Species BABT
Kaskatepe,Banu; Yildiz,Sulhiye.
ABSTRACT: Surfactants are chemical products widely used in our daily life in toothpaste and other personal hygiene and cosmetic products, and in several industries. Biosurfactants are surfactants of biological origin that can be produced by microorganisms and have many advantages, such as low toxicity and high biodegradability, compared to synthetic counterparts. Unfortunately, high production costs limit the use of biosurfactants. Low-cost production is the most important factor for biosurfactants to be able to compete in the global market place. This review presents general information on rhamnolipid biosurfactant produced by Pseudomonas species, as well as on their production and applications. In addition, industrial products and their wastes used for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Application of rhamnolipid; Biosurfactant; Pseudomonas spp.; Rhamnolipid.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100420
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Selection of microorganisms for biosurfactant production using agroindustrial wastes BJM
Nitschke,Marcia; Ferraz,Cristina; Pastore,Gláucia M..
Biosurfactant production by some bacterial isolates using molasses, milk whey and cassava flour wastewater (manipueira) as substrates was evaluated and compared with the production in conventional medium. Isolates growing in manipueira medium decreased the surface tension around 42%, the highest reduction among all the substrates tested. From the eleven isolates tested, eight were able to decrease the surface tension to levels below 30 mN/m using manipueira as substrate. The isolates LB5a, LB2a, LB262, LBB and LB1a that gave surface tension about 26 mN/m were identified as Bacillus sp. Natural manipueira (high solids content) and decanted manipueira (no solids) were investigated as culture media for biosurfactant production by selected microorganisms....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Bacillus; Cassava wastewater; Agroindustrial wastes.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000100013
Registros recuperados: 19
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