Screening, stability and antibacterial potential of rhamnolipids from Pseudomonas sp., isolated from hydrocarbon contaminated soil

Velmurugan, M.; Baskaran, A.; Kumar, Subbaraj Dinesh; Sureka, Indrajith; E, Emelda; Sathiyamurthy, K.

doi:10.7324/japs.2015.50805

Cited by 12 publications

(7 citation statements)

References 48 publications

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“…Importantly, it has been proven that several kinds of biosurfactants possess antibacterial property against planktonic cells and biofilm. For example, conventional rhamnolipids and sophorolipids have been reported to show strong antibacterial activity against Bacillus subtilis and Staphylococcus aureus [27] , [28] . All these characteristics allow biosurfactants to be used as additives and versatile ingredients for the processing of foods.…”

Section: Discussionmentioning

confidence: 99%

Synergistic antibacterial and antibiofilm effects of ultrasound and MEL-A against methicillin-resistant Staphylococcus aureus

Lou

Wei

Zhang

et al. 2021

Ultrasonics Sonochemistry

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Section: Discussionmentioning

confidence: 99%

Synergistic antibacterial and antibiofilm effects of ultrasound and MEL-A against methicillin-resistant Staphylococcus aureus

Lou

Wei

Zhang

et al. 2021

Ultrasonics Sonochemistry

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“…Different environmental factors such as pH, salinity and temperature affect biosurfactants activity and stability. Therefore, it is important to study the influence of these parameters when considering specific applications for these compounds (Velmurugan et al, 2015). These results obtained suggest the feasibility of application in industries which works under extreme conditions of salinity, temperature and pH, as it was informed for other biosurfactants from Candida species (Gusmão et al, 2010; In this regard, the absence of toxicity is also fundamental for possible application of biosurfactant in the environment.…”

Section: Discussionmentioning

confidence: 92%

Promising biosurfactant produced by a new Candida tropicalis UCP 1613 strain using substrates from renewable-resources

Ribeaux¹,

Andrade²,

Silva³

et al. 2017

Afr. J. Microbiol. Res.

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The current work aimed to use agro-industrial wastes as a strategy to obtain biosurfactant from a new Candida tropicalis UCP 1613 isolated from mangrove sediments of Rio Formoso, Pernambuco State, Brazil. The yeast was identified based on 18S rRNA sequencing method and blast homology search. The promising strain showed the ability to use an optimal composition of a cheap medium containing whey (3%), cassava wastewater (7%) and soybean post frying oil (10%) during 96h which reduced significantly the surface tension from 70 to 28.8 mN/m. The yield of the biosurfactant obtained was 4.9 g/L and the minimum value of critical micelle concentration was 1.5%. In addition, this was isolated and characterized as an anionic polymeric molecule, composed of proteins (51%), lipids (37%) and carbohydrates (11%), and confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. Also, biosurfactant was capable in forming stable emulsions at different ranges of temperature, pH and salinity. Alternatively, the biosurfactant displayed no toxicity against the different vegetable evaluated seeds Brassica oleracea, Lactuca sativa L. and Solanum lycopersicum. The antimicrobial activity of this biosurfactant was verified showing the main efficacy against Gram-positive bacteria besides inhibiting the antifungal activity against the yeast tested. The results obtained suggest its potential application to pharmaceutical, as well as environmental area.

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“…Igualmente, los ramnolípidos caracterizados por Techaoei et al (2011) fueron estables sólo en el rango de pH de 6 a 10. Kalimuthu et al (2013) Kaya et al 2014, Velmurugan et al 2015. A partir de este valor se observa la protonación de los grupos carboxilato, provocando la precipitación del ramnolípido.…”

Section: Discussionunclassified

EXTRACCIÓN DE PETRÓLEO EN SUELO CONTAMINADO EMPLEANDO RAMNOLÍPIDOS PRODUCIDOS POR Pseudomonas aeruginosa ORA9

Vilasó-Cadre

Gámez

Rodríguez

2017

Rev. Int. Contam. Ambie.

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Palabras clave: remediación, hidrocarburos, diseño Box-Behnken RESUMEN La remoción de hidrocarburos empleando ramnolípidos ha mostrado potencialidades para su aplicación en tecnologías de remediación de ecosistemas impactados, así como en el aumento de la eficiencia de extracción de petróleo en pozos. En esta investigación se evaluó la remoción de hidrocarburos totales de petróleo de un suelo contaminado empleando los ramnolípidos producidos por Pseudomonas aeruginosa ORA9. Se realizó un estudio de estabilidad de los ramnolípidos considerando los factores temperatura, pH y fuerza iónica. Los ramnolípidos fueron estables en las condiciones ensayadas. Se utilizó un diseño Box-Behnken para evaluar la influencia de la temperatura, pH y tiempo de contacto, en la remoción de petróleo de suelo contaminado. Los tres factores influyeron significativamente, incrementándose la extracción al aumentar la temperatura y el tiempo de contacto y disminuir el pH. La máxima extracción alcanzada fue de un 75 %.Key words: remediation, hydrocarbons, Box-Behnken design ABSTRACT Hydrocarbon removal using rhamnolipids has shown potential for use in remediation technologies of impacted ecosystems as well as increasing the efficiency of oil extraction wells. In this research, the removal of total petroleum hydrocarbons in contaminated soil was evaluated using rhamnolipids produced by Pseudomonas aeruginosa ORA9. A stability study of rhamnolipids considering temperature, pH and ionic strength factors was performed. The rhamnolipids were stable in the tested conditions. A Box-Behnken design was employed to evaluate the influence of temperature, pH and contact time on the removal of petroleum from contaminated soil. All factors have a significative influence on the extraction of total petroleum hydrocarbons, increasing with temperature and contact time, and decreasing with pH. The maximum extraction was 75 %.

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Screening, stability and antibacterial potential of rhamnolipids from Pseudomonas sp., isolated from hydrocarbon contaminated soil

Cited by 12 publications

References 48 publications

Synergistic antibacterial and antibiofilm effects of ultrasound and MEL-A against methicillin-resistant Staphylococcus aureus

Synergistic antibacterial and antibiofilm effects of ultrasound and MEL-A against methicillin-resistant Staphylococcus aureus

Promising biosurfactant produced by a new Candida tropicalis UCP 1613 strain using substrates from renewable-resources

EXTRACCIÓN DE PETRÓLEO EN SUELO CONTAMINADO EMPLEANDO RAMNOLÍPIDOS PRODUCIDOS POR Pseudomonas aeruginosa ORA9

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