The influence of Streptococcus mitis BMS biosurfactants on the adhesion of eight pioneer and four cariogenic oral bacterial strains was, for a first screening, examined in a microtiter plate assay. The adhesion to pellicle-coated wells of three cariogenic strains was inhibited >70% by the biosurfactants, while only one pioneer strain showed >70% reduction. The reduction for the other strains di...

Biosurfactants are the surfactants of microbial origin. They offer so many advantages over their synthetic counterparts due to their biodegradable and environmental friendly nature, that’s why gaining much more attention in creating the era of green technology. Their applications range from cosmetic, pharmaceutical and food processes as emulsifiers, humectants, preservatives, detergents etc. Th...

Many microorganisms, especially bacteria, produce biosurfactants when grown on water-immiscible substrates. Biosurfactants are more effective, selective, environmentally friendly, and stable than many synthetic surfactants. Most common biosurfactants are glycolipids in which carbohydrates are attached to a long-chain aliphatic acid, while others, like lipopeptides, lipoproteins, and heteropolys...

A Pseudomonas aeruginosa mutant derived by random mutagenesis with N-methyl-N¢-nitro-N-nitrosoguanidine, producing high levels of the rhamnolipid biosurfactants was selected on Siegmund-Wagner (SW) plates. The mutant designated P. aeruginosa PTCC1637 produces rhamnolipids at concentrations 10 time more than parent strain. NMR analysis and surface tension measurement showed that the biosurfactan...

Rhamnolipid biosurfactants produced mainly by Pseudomonas sp. had been reported to possess a wide range of potential industrial application. These biosurfactants are produced as monorhamnolipid (MRL) and di-rhamnolipid (DRL) congeners. The present study deals with rhamnolipid biosurfactants produced by three bacterial isolates from crude oil. Biosurfactants produced by one of the strains (named...

Biosurfactants are one of the numerous adaptations of microorganisms metabolizing hydrocarbons and broadly represent a physiological response to specific requirements encountered by the cells depending on their environment. Some bacteria have developed the ‘‘pseudosolubilization’’ strategy to gain access to poorly soluble substrates and therefore produce highly dynamic low-molecular mass biosur...

Biosurfactants (Microbial Surface Active Agents) have become recently an important product of biotechnology for industrial and medical applications. Thereason for their popularity, as high value microbial products, is primarily in their specific action, low toxicity, relative ease of preparation and widespread applicaility. They can be used as emulsifiers, de-emulsifiers, wetting agents, spread...

Chemical surfactants are highly toxic to the environment so the Biosurfactants have paying attention by many scientists because of their low toxicity, biodegradability and ecological acceptability. The aim of this present study is to produce the Biosurfactants from Saccharomyces cerevisiae and Pseudomonas aeruginosa and to check its antimicrobial activity against several bacterial (Such as Esch...

This editorial is an annotation on the exciting research topic " Microbiotechnology based surfactants and their applications " that covers a compilation of original research articles, reviews and mini-reviews submitted by researchers enthusiastically working in the field of biosurfactants. Biosurfactants, which for a long time have been confused with bioemulsifiers, derived their name from biol...

Maneerat, S. Production of biosurfactants using substrates from renewable-resources Songklanakarin J. Sci. Technol., 2005, 27(3) : 675-683 Surface-active compounds commonly used in industries are chemically synthesized. However, biosurfactants have been paid increasing attention to replace the synthetic surfactants owing to their advantages such as biodegradability and low toxicity. Nowadays, t...