Biodegradation of naphthalene in aqueous nonionic surfactant systems

Article Abstract:

Examination of the bioavailability of naphthalene, solubilized by two nonionic surfactants, Brij 30 and Triton X-100, to naphthalene-degrading microorganisms by radiotracer and spectrophotometric techniques reveals that the bacteria are able to degrade the micelle-solubilized naphthalene. Analysis of the influence of aqueous, micellized nonionic surfactants on the microbial mineralization of salicyclic acid and naphthalene by batch experiments indicates that surfactant levels higher than critical micellar concentrations are not toxic to naphthalene-degrading microorganisms. Naphthalene mineralization is not inhibited by these surfactant micelles.

Physiological aspects, Biodegradation, Microorganisms, Bioavailability

---

Characterization of new lipopeptide surfactant produced by thermotolerant and halotolerant subsurface Bacillus licheniformis BAS50

Article Abstract:

Bacillus licheniformis produces lichenysin A, a lipopeptide biosurfactant which has seven amino acids in each molecule of the protein moiety. The bacteria grows on salty substrates and produces lichenysin A both aerobically and anaerobically. Lichenysin A reduces the interfacial tension between oil and salts and can be used for enhanced oil recovery at oil sites where salinity and temperature is very high. Lichenysin A is more effective at low concentrations because its critical micelle concentration is less.

Surface active agents, Microbial enhanced oil recovery, Microbial enhanced petroleum recovery

---

Succession of phenotypic, genotypic, and metabolic community characteristics during in vitro bioslurry treatment of polycyclic aromatic hydrocarbon-contaminated sediments

Article Abstract:

Analysis of ester-linked phospholipid fatty acids, multiplex PCR of microbial genes, and radiorespiratory techniques can be used to determine whether sediments containing polyaromatic hydrocarbons also contain the that can degrade PAHs. The sediments can then be bioremediated and used again.

Bioremediation, Soil microbiology, Polycyclic aromatic hydrocarbons

Similar abstracts:

• Abstracts: Anaerobic degradation of phthalate isomers by methanogenic consortia. The role of benzoate in anaerobic degradation of terephthalate
• Abstracts: Microbial degradation of paintings. Metal toxicity reduction in naphthalene biodegradation by use of metal-chelating adsorbents
• Abstracts: Production of rhamnolipids by Pseudomonas chlororaphis, a nonpathogenic bacterium. Hydrogen peroxide sensitivity of catechol-2,3-dioxygenase: a cautionary note on use of xylE reporter fusions under aerobic conditions
• Abstracts: Detection and characterization of broad-host-range plasmids in environmental bacteria by PCR. Resuscitation by ferrioxamine E of stressed Salmonella enterica serovar Typhimurium from soil and water microcosms
• Abstracts: Candidate gene analysis of thyroid hormone receptors in metamorphosing vs. nonmetamorphosing salamanders. Variation in cytochrome-c oxidase activity is not maternally inherited in the copepod Tigriopus californicus

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.