Crystal violet lactone (CVL) is a classic halochromic dye which has been widely used as chromogenic reagent in thermochromic and piezochromic systems. In this work, a very first example of CVL-based reversible photochromic compound was developed, which showed distinct color change upon UV-visible light irradiation both in solution and in solid matrix. Moreover, metal complex of CVL salicylaldeh...

This paper presents the adsorption of crystal violet (CV+) from aqueous solution on surfactant-modified dolomite. Liquid phase batch operations were carried out to observe the effect of various experimental parameters such as initial dye concentration, adsorbent dosage, pH and NaCl concentration. The optimum conditions for these parameters were calculated by Taguchi method. Equilibrium isotherm...

Preparation of single crystals of LaCuOS, that is a transparent p-type semiconductor exhibiting violet-light emission, was demonstrated by flux method using NaCl+KCl(1:1) as flux. The crystals were grown in an alumina tube inserted in an evacuated silica glass tube using the starting materials of La2O2S and Cu2S, as well as the flux and a small amount of K2S that reduces the coloration of cryst...

Potassium hydrogen phthalate single crystals have been grown by conventional and Sankaranarayanan– Ramasamy method. Dye inclusion crystals have attracted researchers in the context of crystal growth for applications in solid state lasers. The effect of crystal violet as dopant on the characteristic properties of KAP crystal was studied. Thermal stability of the crystals is tested using TG-DTA. ...

In this paper, the results of studies of the sorption activity of Salvadora Persica fine particles that were provided from internal natural resources at Iran, with respect to Crystal Violet, Basic Violet-16 and Basic Blue-41 dyes were presented. Thus, Salvadora Persica particles were modified and prepared via particle size decreasing and characterized by CHNS, XRD, SEM and FT-IR analysis. In th...

The aim of the study was to characterise the free coagulase-negative Staphylococcus sp. strains isolated from normal (9.4%) and inflamed quarter milk samples of dairy cows in one herd localised in southern Poland. The isolates were examined phenotypically by cultural features, tube coagulase test, clumping factor (CF), and commercial agglutination test. Total number of 427 strains were cultivat...

Vibrio parahaemolyticus was subjected to cold shock treatment at 20 or 15 degrees C for 2 or 4 h. The effect of cold shock on the survival of V. parahaemolyticus subjected to subsequent low temperature (5 and -18 degrees C) and other adverse conditions (47 degrees C, 6 ppm crystal violet, 1000 ppm H(2)O(2), 25 mM acetic acid and 25 mM lactic acid) was investigated. Regardless of the cold shock ...

Detergent-disinfecting agents (dD) are used daily for cleaning reused medical devices. We have devised a simple method to test dD detergent activity (DA) using an E. coli 54127 biofilm prepared in haemolysis glass tubes, which are cleaned with test dD, according to supplier's recommendations. Crystal violet 0.05% is used to colour the residual biofilm after dD (or tap water control) application...

Evanescent-wave cavity ring-down spectroscopy has been applied to a planar fused-silica surface covered with crystal violet (CV+) cations to characterize the silanol groups indirectly. A radiation-polarization dependence of the adsorption isotherm of CV+ at the CH3CN/silica interface is measured and fit to a two-site Langmuir equation to determine the relative populations of two different types...

BACKGROUND AND OBJECTIVES Biomaterials are widely used in medical devices such as urinary catheters. One of the main problems associated with long term using of the urinary catheters is biofilm formation on their surfaces. Many techniques have been presented to reduce the biofilm formation. One of the most revolutionary techniques allowing such surface fictionalization is plasma surface modific...