Stimulation of rhamnolipid biosurfactants production in Pseudomonas aeruginosa AK6U by organosulfur compounds provided as sulfur sources

Ismail, Wael; Shammary, Sultanah Al.; El‐Sayed, Wael S.; Obuekwe, C. O.; Nayal, Ashraf M. El; Raheem, Abdul Salam Abdul; Al-Humam, Abdulmohsen A.

doi:10.1016/j.btre.2015.03.001

Cited by 29 publications

(40 citation statements)

References 45 publications

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“…Comparison of the 16S rRNA gene sequences of isolates G2 and G3 with the GenBank database allowed their assignment to P. aeruginosa strain GIM 32 and P. aeruginosa strain NV2, respectively. These findings are in agreement with previous studies that reported the presence of the strains of P. aeruginosa in hydrocarbon-polluted sites (Widada et al, 2002;Ismail et al, 2015;Das et al, 2014;Coutinho et al, 2013;Sharma et al, 2014) and in stored fuels (Gaylarde et al, 1999;Hamed et al, 2013).…”

Section: Discussionsupporting

confidence: 93%

Isolation and characterization of petroleum product emulsifying Pseudomonas strains from a generating set fuel tank

Lebonguy¹,

Goma-Tchimbakala²,

Miambi³

et al. 2017

Afr. J. Microbiol. Res.

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This study characterized microbial strains isolated from diesel fuel samples collected from the tank of a generating set at the Institute of Research for Development in Pointe-Noire (Congo). Two bacterial isolates (G2 and G3) were distinguished by their color on agar plates and were characterized by their API 20E biochemical profiles and by 16S rRNA gene sequencing. The phenotypic properties of these isolates were consistent with their assignment to the genus Pseudomonas. Comparative 16S rRNA gene sequence analysis demonstrated that the G2 and G3 isolates were close relatives of P. aeruginosa strain GIM 32 and P. aeruginosa strain NV2, respectively, with 97% sequence identity. These two P. aeruginosa strains were able to grow in a mineral salt medium supplemented with 2% diesel fuel or SAE 90 gear oil as the only source of carbon. P. aeruginosa G3 showed faster growth and was able to emulsify diesel fuel (53%), gasoline (90%) and hexane (95%) more strongly than P. aeruginosa G2.

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Section: Discussionsupporting

confidence: 93%

Isolation and characterization of petroleum product emulsifying Pseudomonas strains from a generating set fuel tank

Lebonguy¹,

Goma-Tchimbakala²,

Miambi³

et al. 2017

Afr. J. Microbiol. Res.

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“…Iron has also been shown to affect Bs production since it plays important roles in oxidative phosphorylation [1]. Furthermore, monovalent and bivalent ions such as K + , Na + , Mg 2+ , Ca 2+ , and trace element salts increase Bs yield [4,7].…”

Section: The Effect Of Trace Elements On Bs Productionmentioning

confidence: 99%

“…The use of adequate nutrients (carbon and nitrogen sources) directly influences the Bs metabolism, and thus, production [1,7]. Apart from directly participating in cell growth and reproduction, the carbon and nitrogen sources are used as building blocks for Bs biosynthesis.…”

Section: Effect Of Carbon and Nitrogen Sourcesmentioning

confidence: 99%

“…Although they present similar properties to synthetic surfactants they are generally less toxic (with the exception of those presenting antibiotic activity), stable under extreme conditions, they are also biodegradable, and thus, are environmentally friendly [6,7]. Bs are classified into peptides, glycolipids, lipopeptides, fatty acids, phospholipids, and high molecular weight biosurfactants like polymeric biosurfactants [1,8].…”

Section: Introductionmentioning

confidence: 99%

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Statistical Design, a Powerful Tool for Optimizing Biosurfactant Production: A Review

Bertrand

Martínez‐Morales

Rosas-Galván

et al. 2018

Colloids and Interfaces

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Biosurfactants (Bs) have been studied for decades and applied in different industrial sectors because of their competitive biochemical characteristics, and the fact that they are environmentally friendly. Current scientific investigations mainly involve the search for novel Bs producing organisms with attractive characteristics. Bs are expected to replace synthetic surfactants in the near future, but low production yields and inefficient downstream processes have prevented their widespread use. Although there are numerous reports on Bs optimization, to date there has been no critical compilation or revision of the statistical designs and strategies employed for improved production. The purpose of this mini review is to briefly discuss the factors that affect Bs production and the importance of statistical design as an essential tool for increasing production.

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“…Sulphur, thus, was found to play a major role in the number and types of rhamnolipid congeners formed (Ismail et al . ). Strains like this would have the added potential to be used in a coproduction set up wherein biosurfactant production is coupled with another bioprocess desulphurization in case of this strain, thereby reducing the overall process economics.…”

Section: Media Formulation For Biosurfactant Productionmentioning

confidence: 97%

Biosurfactant production: emerging trends and promising strategies

2018

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Biosurfactants are economically most sought after biotechnological compounds of the 21st century. However, inefficient bioprocessing has mitigated the economical commercial production of these compounds. Although much work is being done on the use of low-cost substrates for their production, a paucity of literature exists on the upcoming bioprocess optimization strategies and their successes and potential for economical biosurfactant production. This review discusses some of the latest developments and most promising strategies to enhance and economize the biosurfactant production process. Recent market analysis, developments in the field of optimally formulated cost credit substrates for enhanced product formation and subsequent process economization are few of the critical aspects highlighted here. Use of nanoparticles and coproduction of biosurfactant along with other commercially important compounds like enzymes, are other upcoming bioprocess intensification strategies. The recent developments discussed here would not only give an overview of pertinent parameters for economic biosurfactant production but would also bring to fore multiple strategies that would open up new avenues of research on biosurfactant production. This would go a long way in making biosurfactants a commercially successful compound of the current century.

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Stimulation of rhamnolipid biosurfactants production in Pseudomonas aeruginosa AK6U by organosulfur compounds provided as sulfur sources

Abstract: HighlightsOrganosulfur compounds promote biosurfactants production when provided as sulfur sources.Quantitative and qualitative changes in biosurfactants production depending on the sulfur source.Simultaneous production of biosurfactants and biodesulfurization.

Cited by 29 publications

References 45 publications

Isolation and characterization of petroleum product emulsifying Pseudomonas strains from a generating set fuel tank

Isolation and characterization of petroleum product emulsifying Pseudomonas strains from a generating set fuel tank

Statistical Design, a Powerful Tool for Optimizing Biosurfactant Production: A Review

Biosurfactant production: emerging trends and promising strategies

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