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Rhamnolipid Biosurfactants Produced by Pseudomonas …

Synthesis of bolaform biosurfactants by an engineered Starmerella bombicola yeast.

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Synthesis of biosurfactants in extreme conditions, …

The microbial biosurfactants synthesis and their application have an important practical significance for a range of petroleum pollutants bioremediation. It may be concluded that microbial degradation can be considered as a key component in the cleanup strategy for petroleum hydrocarbon remediation due to their biodegradability and low toxicity.

 Keywords: biodegradation, biosurfactants, hydrocarbons, petroleum products

The interest in industrial biotechnology and its importance opens up challenging possibilities of research in this area. Surfactants have long been among the most versatile of process chemicals. Their market is extremely competitive and manufacturers will have to expand their arsenal to develop products for the year 2000 and beyond. Biosurfactants are one of the most promising compounds in this regard. A review of the literature reveals that studies on oil-degrading and biosurfactant-producing microorganisms deal almost exclusively with their synthesis in moderate environments. Biosurfactants and the microbes that produce them have numerous industrial, medical and environmental applications, which frequently involve exposure to extremes of temperatures, pressure, ionic strength, pH and organic solvents. Hence, there is a continuing need to isolate microbes that are able to function under extreme conditions. There is an urgent need to explore these extremophiles for their ability to produce biosurfactants that can function suitably under the conditions prevailing when they are applied.

CAREER: Scalable Synthesis of Designed Biosurfactants …

“Synthesis of Bolaform Biosurfactants by an Engineered Starmerella Bombicola Yeast.”  113.12 (2016): 2644–2651.

The physiological role of biosurfactants in microorganisms is to facilitate the contact of bacterial cells with hydrophobic substrates. Surfaces of most bacteria are hydrophilic, this allows them to effectively interact with the water-soluble compounds and ensure the normal operation of membrane-bound enzyme systems. However, it is difficult to contact with hydrophobic substrates such as petroleum products. Nevertheless, the group of microorganisms capable of assimilating oil hydrocarbons as a source of carbon and energy is very extensive. As the hydrocarbon-enzyme systems are localized in the cytoplasm of the bacteria, the ability of a strain to assimilate hydrocarbons depends primarily on the ability to absorb hydrophobic substrate. The absorption process may limit the oxidation process. Thus microbial hydrocarbons degradation may stop after the emulsifying activity loss [], although it is possible at surfactant adding to the medium. The responsible for bioSAS synthesis genes expression activates bacterial uptake hydrocarbons [].

B) lipopeptides - low molecular weight compounds consisting of a peptide (protein) and lipid parts, synthesized by some pseudomonades and yeasts, the most famous producers are members of the genus, synthesizing a wide range of lipopeptide biosurfactants.

Synthesis of biosurfactants in extreme conditions. - open

This review on rhamnolipids showed that these biosurfactants have the potential to apply in a range of theatrical chemical surfactants due to their broad application area and significance.

Different hydrocarbons interaction pathways and the corresponding bioSAS types are characteristic to different taxonomic groups of organisms, reflecting the different environmental strategies and are important for their use in biotechnological applications. Intracellular bioSAS not appear to play a physiological role in the absorption of compounds from the environment as well as evolved only after bacteria death. The most widely studied biosurfactant type is extracellular bioSAS that synthesized by broad range of microorganisms: , , , genera bacteria [, ], some strains of the , genera, yeast []. Cell-associated biosurfactants are less common and characteristic mostly for actinobacteria representatives.

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  • “Synthesis of biosurfactants in extreme conditions.” Appl ..

    Synthesis of rhamnolipid biosurfactant and mode of hexadecane uptake by Pseudomonas species

  • Biosurfactants: Production and Applications | …

    Increasing awareness among consumers for bio-based products will give rise to new markets for the biosurfactants

  • Biosurfactants: Production and Applications ..

    Microbial Biosurfactants Role in Oil Products …

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"Microbial Biosurfactants Role in Oil Products ..

Chapters present research findings on specific biosurfactants, such as high surface activity rhamnolipids, yeast-derived sophorolipids, lipopeptides, and trehalose lipids that have potential for environmental, industrial, and medical uses.

RHAMNOLIPIDS biosurfactants - SlideShare

The book also describes sources and characteristics of marine microbial biosurfactants, biosurfactants made from food processing by-products and biosurfactants used in the food industry, and biosurfactants for green synthesis of nanoparticles.

and biosurfactants for green synthesis of nanoparticles.

From the above studies it can be concluded that, waste frying oils can be profitably used to synthesize biosurfactants, which are required in bulk quantities for various medicinal, industrial and environmental applications.

Items in Shodhganga are protected by copyright, with all rights reserved, unless otherwise indicated.

Rhamnolipids as biosurfactants from renewable …

In the vast majority of studies the biosurfactant production by submerged microorganisms cultivation in a liquid medium was investigated [, ]. However, bacterial biosurfactants synthesis occurs also at the surface growth on solid media, both hydrocarbons supplied and limited []. This phenomenon is interesting especially because soil bacteria occur not primarily in suspension but attached to the particles surfaces.

26/08/2014 · Synthesis of Biosurfactants

From the above studies it can be concluded that, waste frying oils can be profitably used to synthesize biosurfactants, which are required in bulk quantities for various medicinal, industrial and environmental applications.

Items in Shodhganga are protected by copyright, with all rights reserved, unless otherwise indicated.

with concomitant production of biosurfactants

Indian scientists Aparna A., Srinikethan G., Smitha H. [] have shown that addition of 50 mg of biosurfactant per 100 ml of the basal salt medium containing 1% crude oil significantly enhanced the crude oil degradation indicating that the organism utilized crude oil as carbon source. Earlier Zhang Y. and Miller R.M. [] described how dirhamnolipids enhanced hexadecane degradation by seven different strains.

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