Kennedy and Barbaro (1953) presented data suggesting that crystal violet adsorption values correlated directly with the gram staining character of bacterial cells, and implied that such quantitative dye uptake studies might prove a basis for a much needed quantitative index of gram positivity. Their results are consistent with a popular theory of the mechanism of gram differentiation presented ...

Fluorescence correlation spectroscopy (FCS) is a standard tool for studying diffusion of molecules in solution, but is limited to low analyte concentrations, in the range between 10 pM and 1 nM. Such concentration limitations can be overcome by using a plasmonic nanoantenna which confines the electric field of excitation light into a tiny volume near its surface and thereby reduces the effectiv...

Bioaccumulation of synthetic dyes viz. Acid Blue 93, Direct Red 28 and Basic Violet 3 by the environmental yeast isolate, Candida tropicalis growing in aqueous extract of sugarcane bagasse medium was studied in a batch system as a function of initial pH and dye concentrations. The optimum pH value for bioaccumulation was found to be 3.0 for Acid Blue 93 and Direct Red 28 and 5.0 for Basic Viole...

In the search for functional organic biomaterials, leather constituted by collagen fibers was coated with a conducting polymer, polypyrrole. The coating carried out during oxidation of pyrrole in an aqueous solution poly(N-vinylpyrrolidone) presence five dyes: crystal violet, neutral red, methyl orange, acriflavine, and methylene blue. This technique ensures uniform polypyrrole incorporation dy...

This paper analyzes the adsorption of two potential toxic dyes, i.e. methylene blue (MB) and crystal violet (CV) onto Bauhinia forficata residual fruit powder (BFRFP) as a new promising adsorbent. The experiments aimed at retrievement data are carried out T = 298–328 K coupled with an adsorbent characterization to better highlight MB CV dyes mechanism. capacity saturation (ACS) varies from 181....

In a previous communication 1 a selective bactericidal p roper ty possessed by gentian violet was described, and observations were reported to indicate the nature of this chemical affinity as exhibited in a study of a large number of representative bacteria. It was shown that bacteria could be sharply divided into two groups by their behavior toward gentian violet, either by staining the organi...

Bio-absorbent palm fiber was applied for removal of cationic violet methyl dye from water solution. For this purpose, a solid phase extraction method combined with the artificial neural network (ANN) was used for preconcentration and determination of removal level of violet methyl dye. This method is influenced by factors such as pH, the contact time, the rotation speed, and the adsorbent dosag...

In the present work, the simultaneous determination of Brilliant green (BG) and Crystal violet (CV) dyes with overlapped absorption spectra in binary mixture solution, was carreid out using the partial least squares (PLS) and direct ortogonal signal correction-partial least squares (DOSC-PLS) methods. The results obtained indicate that by applying DOSC on the calibration and prediction data for...

In this research, the adsorption capacity of diatomaceous earth in removal crystal violet dye (CV) aqueous solution was evaluated. The experimental methodology began with determination texture properties by adsorption-desorption isotherms N2 a 77 K, identification functional groups Fourier transform infrared spectrophotometry (FTIR), morphology scanning electron microscopy (SEM) and, pH isoelec...