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We characterized a newly isolated bacterium, designated as IR1, with respect to its ability to degrade polycyclic aromatic hydrocarbons (PAHs) and to produce biosurfactants. Isolated IR1 was identified as Pseudomonas putida by analysis of 16S rRNA sequences (99.6% homology). It was capable of utilizing two-, three- and four-ring PAHs but not hexadecane and(More)
The increasing world demand for fuels makes it necessary to exploit the largest reserve of extra-heavy crude oil (EHCO) of the Orinoco Oil Belt from Venezuela. We propose the use of extracellular oxidative enzymes, in particular, lignin-degrading enzyme systems (LDS) of fungi, for enzymatic improvement of EHCO. Autochthonous non-white rot fungal strains(More)
Transforming growth factor-beta 1 (TGF-beta 1) is a multifunctional polypeptide that regulates a number of cellular processes including cell growth and deposition of extracellular matrix protein. Despite the fact that the signal transduction by TGF-beta has been intensively studied, the molecular mechanisms of that pathway are not clear. We have studied the(More)
The diffusive water permeability (P d ) of the plasma membrane of proximal kidney tubule cells was measured using a1H-NMR technique. The values obtained for the exchange time (T ex) across the membrane were independent of the cytocrit and of the Mn2+ concentration (in the range 2.5 to 5mm). At 25°C the calculatedP d value was (per cm2 of outer surface area(More)
BACKGROUND AND PURPOSE High-sensitivity C-reactive protein (hsCRP) and lipoprotein-associated phospholipase A2 (Lp-PLA2) are hypothesized to be biomarkers of systemic inflammation and risk of myocardial infarction (MI) and stroke. Little is known, however, about the stability of these markers over time, and in particular, about the effects of acute vascular(More)
In this study the biodegradation of oil by hydrocarbon degrading Pseudomonas putida in the presence of a biosurfactant-producing bacterium was investigated. The co-culture of test organisms exhibited improved degradation capacities, in a reproducible fashion, in aqueous and soil matrix in comparison to the individual bacterium culture. Results indicate that(More)
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