,YIn a previous study (Sevag and Gots, 1948) on the effects of various drugs on the pneumococcal dehydrogenase systems it was found that, whereas acriflavine, atabrine, propamidine, and optochin could inhibit these systems, high concentrations of sulfonamides had no effect. Other investigators (Mellon aind Bambas, 1937; Brazda and Rice, 1942; Fox, 1942; Clifton and Loewinger, 1943) have reporte...

Quantification of viable cells is a critical step in almost all biological experiments. Despite its importance, the methods developed so far to differentiate between viable and non-viable cells suffer from major limitations such as being time intensive, inaccurate and expensive. Here, we present a method to quantify viable cells based on reduction of methylene blue dye in cell cultures. Althoug...

The fecal lactoferrin assay was more sensitive (75%) than methylene blue microscopy (40%) for the detection of leukocytes in Clostridium difficile toxin-positive fecal samples. Although limited sensitivity and specificity precludes its use as a laboratory screening test, it may be a more useful initial test in an algorithm for clinically suspected C. difficile-associated disease.

background and objective: there is a concern on safety of human fresh frozen plasma (ffp) as it is a source of some medicinal products. the possibility of transmission of blood-borne are reported often due to emerging viruses. there are some pathogen reduction technologies (prt) to inactivate viruses. methylene blue (mb) based method is one of them. the aim of this study was to examine new desi...

a new simple arid rapid catalytic kinetic method for determination of trace amounts of chromium (110 isdescribed. the method is based on the catalytic effect of chromium (iii) on the reduction of methylene blue byascorbic acid in acidic media. the reaction monitored smectrophotomenically by measuring the decrease ofabsorbance at 664 nm at 25 c. the fixed-time method was used for the first 300 s...

in this study, removal of methylene blue by electro-coagulation method using aluminum and iron electrodes was investigated. the influence of the operating parameters such as contact time, current density, anode type, inter-electrodes distance, initial and final ph and energy consumption rate was determined. dye removal was increased with increases in solution ph, current density and contact tim...

The glass surface modification with 3-(mercaptopropyl) trimethoxysilane (MPTS), gold nano-particles (GN) and guanine rich single strand DNA (ss-DNA) was utilized as a novel and efficient platform for sensing trace concentration of methylene blue (MB) by an inexpensive spectrophotometric method. Methylene Blue (MB) can interact with the guanine base of single strand DNA and absorbed onto glass s...

Derivatives of the standard cationic photosensitiser, methylene blue, were synthesised, having extra amino (basic) functionality in the auxochromic side-chain. The resulting analogues were profiled for photodynamic activity in vitro, and screened against standard Gram-positive and Gram-negative bacteria for photobactericidal activity. The substitution pattern of the derivatives was such that io...

Vasoplegic syndrome is a recognized complication following cardiac surgery using cardiopulmonary bypass and is associated with increased morbidity and mortality. In several patients profound post-operative vasodilatation does not respond to conventional vasoconstrictor therapy. Methylene blue has been advocated as an adjunct to conventional vasoconstrictors in such situations. There is limited ...

A novel polyaniline/Bi(2)SnTiO(7 )composite polymer was synthesized by chemical oxidation in-situ polymerization method and sol-gel method for the first time. The structural properties of novel polyaniline/Bi(2)SnTiO(7) have been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray spectrometry. The lattice parameter of Bi(2)SnTiO(7) was f...