Performance of a novel fluorogenic chimeric analog for the detection of third-generation cephalosporin resistant bacteria.

Resistance to third generation cephalosporins is widely disseminated in Enterobacteriaceae mainly due to extended-spectrum-β-lactamases, plasmid AmpC β-lactamases, and hyperproduction of chromosomal AmpC β-lactamases. Here we evaluated the performance of a novel fluorogenic probe rapid test and compared the results with the phenol red assay using a total of 77 characterized organisms (44 extended-spectrum-β-lactamases, 33 chromosomal or plasmid AmpC β-lactamases) and 46 susceptible organisms. The fluorescent assay showed higher sensitivity than the phenol red assay in cefotaximase type extended-spectrum-β-lactamases, non- cefotaximase type extended-spectrum-β-lactamases, chromosomal AmpC β-lactamases, and plasmid AmpC β-lactamases (96.

Enhanced Near-IR Cutting Performance in the Mixture of Cs(x)WO3 and Sb:SnO2 Nanoparticles.

The Cs(x)WO3 nanoparticles were synthesized at 800 degrees C under a reducing ambient, and then milled up to nanoscale by a high-energy ball planetary miller. They showed a single phase, and a mean particle size of 80 nm. The Cs contents (x) in Cs(x)WO3 nanoparticles were optimized to be x = 0.