The traditional measurement methods of 3 kinds of aluminum species and the total aluminum content in polyaluminum solutions are Al-Ferron timed complex spectrophotometry and EDTA chelatometry respectively. But eachof these methods has different deficiencies. In this paper, microwave digesting technical had be coupled with the radiate Ferron spectrophotometry to rapid mensurate the concentration...

In a preliminary study, known staphylococcus (n = 86) and other microbial (n = 12) isolates were plated on three chromogenic media, SaSelect (Bio-Rad, Hercules, CA, USA), CHROMagar Staph. aureus (CHROMagar Microbiology, Paris, France), and S. aureus ID (bioMérieux, Marcy l'Etoile, France). The sensitivities of all the media to detect Staphylococcus aureus after 24 h of incubation were high (100...

Recently, systems have been developed to create total laboratory automation for clinical microbiology. These systems allow for the automation of specimen processing, specimen incubation, and imaging of bacterial growth. In this study, we used the WASPLab to validate software that discriminates and segregates positive and negative chromogenic methicillin-resistant Staphylococcus aureus (MRSA) pl...

BACKGROUND We evaluated the performance of three chromogenic media (Brilliance agar I [Oxoid, UK], Brilliance agar II [Oxoid], and ChromID MRSA [Biomérieux, France]) combined with broth enrichment and the Xpert MRSA assay for screening of methicillin-resistant Staphylococcus aureus (MRSA). METHODS We obtained 401 pairs of duplicate nasal swabs from 321 patients. One swab was suspended overnig...

A number of Escherichia coli clones were isolated from a Lactobacillus delbrueckii subsp. lactis gene library capable of hydrolysing the chromogenic substrate Gly-Ala-beta-naphthylamide (Gly-Ala-beta NA). Some of the recombinant plasmids carried by these clones have been shown to encode the cysteine aminopeptidase gene pepC. Nucleotide sequence analyses of the plasmid inserts of the remaining c...

Rapid detection of vancomycin-resistant enterococci (VRE) infection is very important for control and prevention of nosocomial spread of these bacteria. A multiplex PCR method for rapid screening of VRE has recently been developed. We performed a prospective study of VRE screening tests to compare the performance of PCR to that of a chromogenic agar-based culture method. From January to Decembe...

A new dual-ion-switched molecular brake was synthesized and operated by chemical reagents (H+/OH- and Zn2+/EDTA), and its rotation could be read out by chromogenic, fluorogenic and electrochemical signals.

The chromogenic Limulus amoebocyte lysate test effectively detected 66 (100%) culture-proven gram-negative peritonitis cases among 185 continuous ambulatory peritoneal dialysis patients with clinical evidence of infectious peritonitis.

The different optical responses in chromogenic sensor stimulated by addition of Cu(2+) (red to blue) and Ni(2+) (red to green) allow simultaneous estimation of Cu(2+) and Ni(2+).

A new naked-eye chromogenic chemosensor based on 2-thiohydantoin shows high selectivity for fluoride ions and is used to develop a test paper for detection of fluoride ions in the solid state.