Use of biosurfactants as a green stabilizer for the biological synthesis of gold nanoparticles (AuNPs) is now emerging as nontoxic and environmentally acceptable "green chemistry" procedures. Stability of AuNPs at different pHs is very important because our body has different pHs. This paper addresses this issue. In this work, first P. aeruginosa PTCC 13401 was used to produce rhamnolipid biosu...

Correspondence: Danka Galabova Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 26, 1113 Sofia, Bulgaria e-mail: [email protected]; ABSTRACT The resistance of bacteria to antibiotics is a serious public problem with increasing significance. The development of novel pharmaceuticals with wide spectrum...

Biosurfactants have been shown to a variety of other agricultural applications. Antimicrobial activity is desirable property in biosurfactants. Several biosurfactants produced from bacteria antibacterial against plant diseases, making them promising biocontrol molecule for ensuring sustainability the long run. The purpose this research was characterize biosurfactant at different carbon source b...

The rhamnolipid biosurfactant produced by Pseudomonas aeruginosa influences various processes related to hydrocarbon degradation. However, degradation can only be enhanced by the surfactant when it stimulates a process that is rate limiting under the applied conditions. Therefore we determined how rhamnolipid influences hexadecane degradation by P. aeruginosa UG2 under conditions differing in h...

The rhamnolipid biosurfactant produced by Pseudomonas aeruginosa influences various processes related to hydrocarbon degradation. However, degradation can only be enhanced by the surfactant when it stimulates a process that is rate limiting under the applied conditions. Therefore we determined how rhamnolipid influences hexadecane degradation by P. aeruginosa UG2 under conditions differing in h...

Quorum sensing (QS) has received significant attention in the past few decades. QS describes population density dependent cell to cell communication in bacteria using diffusible signal molecules. These signal molecules produced by bacterial cells, regulate various physiological processes important for social behavior and pathogenesis. One such process regulated by quorum sensing molecules is th...

Biosurfactants are microbial substances which influence interfacial tension. The kinetic study was carried out for Pseudomonas aeruginosa MR01 during biosurfactant production in a two-phase liquid-liquid batch fermentation system. The maximum rhamnolipid concentration (P ) and the yield of biosurfactant per max biomass (Y ) in a 5-L bioreactor containing soybean oil medium were found to be appr...

conclusions application of rhamnolipid biosurfactant produced by pseudomonas aeruginosa significantly improved pyrene removal in contaminated soils. results the pyrene removal efficiency in samples containing biosurfactant, without biosurfactant and controls, were 86.4%, 59.8% and 14%, respectively, after 63 days. the difference of pyrene removal efficiency between the biosurfactant-containing ...

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 limi...