Hydrolysis of 4-hydroxybenzoic acid esters (parabens) and their aerobic transformation into phenol by the resistant Enterobacter cloacae strain EM

Article Abstract:

Researchers report the isolation of a strain of Enterobacter cloacae that can degrade parabens and is therefore resistant to them. Methylparaben and propylparaben are used in many foods, drugs, and cosmetics to preserve them, since they have antimicrobial activity against many bacteria.

Microbial metabolism, Enterobacter, Enterobacteriaceae

---

Transformation of phenol into phenylalanine by a methanogenic consortium

Article Abstract:

A study was conducted on the transformations of benzoic acid into 3-phenylpropionic acid (PPA) and phenylalanine. The consortium was found to be highly dependent on amino acids or proteose peptone as a nutrient for phenol cometabolism. A low incorporation of deuterium in phenylalanine with (5,6,7,8,92H)PPA was observed and attributed to the low speed at which the compound is used by the bacteria. Benzoic acid transformation into PPA could be an alternative to bacteria for phenylalanine synthesis when the medium becomes depleted with accessible sources of phenylalanine.

Biodegradation, Phenols, Phenols (Class of compounds)

---

Biosurfactant production by a soil Pseudomonas strain growing on polycyclic aromatic hydrocarbons

Article Abstract:

Ten out of the twenty-three polycyclic aromatic hydrocarbon (PAH)-utilizing bacterial strains isolated from soils contaminated with petroleum wastes produce biosurfactants. The production of biosurfactants is analyzed by surface tension lowering and emulsifying properties of bacteria. Biosurfactants are produced by bacteria grown on soluble substrates such as mannitol and dextrose and PAHs such as naphthalene and phenanthrene. A study of a Pseudomonas aeruginosa strain indicates that cultures with mannitol rather than naphthalene promote faster production of biosurfactants.

Analysis, Usage, Pseudomonas aeruginosa, Polycyclic aromatic hydrocarbons, Surface active agents, Glucose, Mannitol, Dextrose

Similar abstracts:

• Abstracts: Conjugated linoleic acid accumulation via 10-hydroxy-12-octadecaenoic acid during microaerobic transformation of linoleic acid by Lactobacillus acidophilus
• Abstracts: Transport of acetic acid in Zygosaccharomyces bailii: effects of ethanol and their implications on the resistance of the yeast to acidic environments
• Abstracts: Structure of the cell envelope of corynebacteria: importance of the noncovalently bound lipids in the formation of the cell wall permeability barrier and fracture plane
• Abstracts: Repeated ruminal dosing of Ruminococcus spp. does not result in persistence, but changes in other microbial populations occur that can be measured with quantitative 16S-rRna-based probes
• Abstracts: Characterization of an autostimulatory substance produced by Escherichia coli. Individual-based modelling of biofilms

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