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Showing 1 to 20 of 38 for “"Malachite green"”.
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The kinetics of hydrolysis and the electronic absorption spectra of some sterically hindered basic dyes
A comprehensive series of derivatives of Malachite Green substituted in the phenyl ring with silicon, phosphorus, sulphur, nitrdgen or oxygen containing groups have been synthesised. Their absorption spectra have been measured in 98% acetic acid solution and compared with that of Malachite Green. …
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The chemistry of some polysubstituted derivatives of di - and triphenylmethane dyes
Several series of disubstituted derivatives of Malachite Green containing chloro, fluoro, methoxy and methyl groups in the phenyl ring have been synthesised and their respective visible absorption spectra compared with that of Malachite Green. In most cases where steric effects are unimportant an …
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Fungal Control Methods, Diets and Water Temperatures Used to Culture Paddlefish, Polydon spathula
… at 1667 mg/1 and later at 833 mg/l; and with malachite green, for 2 min daily at 65 mg/1, to control fungus. Hatching success, determined by estimating numbers of fry at swim-up, was 16.6% for the eggs treated with formalin and 21.8% for the eggs treated with malachite green. Hatching success …
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The chemistry of some heterocyclic analogues of triphenylmethane dyes
… has been synthesised in which the phenyl ring of Malachite Green has been replaced by a 5- or 6- membered heterocycle containing nitrogen, oxygen or sulphur as hetetâacoins. The visible absorption spectra of the dyes have been correlated with the electronic and structural features of the …
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Alkyl, alkenyl and cycloalkyl substituted triphenylmethane dyes
A series of Malachite Green derivatives containing alkyl an alkenyl substituents in the 2-, 3-. and 4- positions has been synthesised. Their respective visible absorption spectra have been correlated with the electronic and steric effects of the methyl, ethyl, propyl, butyl and vinyl substituents …
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The chemistry of some basic triphenylmethane dyes
… with two identical terminal groups, analogues of Malachite Green, and those with three terminal groups, the Crystal Violet series. N,N-dimethylamino--, N,N-diethylamino-, pyrrolidino-,piperidino and morpholino- grou'ps have been slected as terminal groups in order to give a wide variation in both …
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A kinetic and photochemical study of some basic dyes
… range of substituted oxygenbridged analogues of Malachite Green. The dye perchiorates have been prepared from the corresponding carbinols or leuco bases. The influence of the terminal group and the bridging unit together with the effects of substituents on the electronic absorption spectra of the …
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The electronic absorption spectra of di- and tri-arylmethane dyes containing fluorine
… comprehensive series of derivatives of Malaohite Green, Crystal Violet and Michler's Hydrol Blue has been synthesised containing meta-trifluoromethyl groups. Such dyes have not been previously prepared because of earlier difficulties encountered in synthesising N.N-dimethyl-2-tri …
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Electronic absorption spectra of basic dyes containing terminal diethylamino and morpholino groups
… and triuluoromethyl derivatives of Brilliant Green and Morpholine Green have been synthesised and their visible absorption spectra have been correlated with structural features. The spectral data for the parent dyes have been compared with those for Malachite Green and the differences have …
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The Chemistry of some Di- and Tri-Phenylmethane dyes
… a comprehensive series of novel, unsymmetrical Malachite Green type dyes containing different amino substituents in the 4-positions of the phenyl rings and a series of symmetrical Michier's Hydrol Blue type dyes. Both series of dyes have been synthesised from the relevant carbinols or hydrols. …
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Studies on the host range and chemical control of fungi associated with diseased tropical fish
… tested would permit sustained fish culturing. Malachite green was the most effective fungicide tested, being functional in concentrations as low as 2 ppm.
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New photosensitisers for photodynamic therapy
… previously unknown benzopyranyl derivatives of Malachite Green has also been achieved and that of known and new 2,3-dimethyl analogues of Malachite Green and Crystal Violet has been improved. The UV-visible absorption spectra of these dyes have been recorded in acetic acid-water mixtures and …
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Activated Carbon from North Dakota Lignite
… 4 percent of the color from a stock solution of malachite green indicator while many of the products of this investigation removed 75 to 85 percent.</p><p>The analysis of variance of the results of the two designs used indicate that the effects of residence time between 6 minutes to 24 minutes is …
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Surface Enhanced Raman Spectroscopy as a Tool for Waterborne Pathogen Testing
… rhodamine B isothiocyanate (RBITC) and malachite green isothiocyanate (MGITC) were surface enhanced by the gold nanoparticles resulting in unique fingerprint SERS spectra. The SERS label method was successful in detecting G. lamblia and C. parvum simultaneously. The method was …
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Triphenylmethylium-Based Multitopic Two-Photon Absorbers: Synthesis and Characterization
… NonLinear Optics, Biphotonic absorption, Malachite Green, Violet Crystal, Organoiron, Organoruthenium, ferrocene, redox commutation
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Triphenylmethylium-Based Multitopic Two-Photon Absorbers: Synthesis and Characterization
… NonLinear Optics, Biphotonic absorption, Malachite Green, Violet Crystal, Organoiron, Organoruthenium, ferrocene, redox commutation
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Understanding PilB, The Type IV Pilus (T4P) Assembly ATPase
… expressed and purified as a hexamer. Malachite green phosphate assay was used to examine CtPilB ATPase activity. The examination indicated that CtPilB is a robust ATPase with a complex kinetics profile. The profile has a stepwise incline in ATPase activity as a function of [ATP] that …
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Novel integrated paired emitter-detector diode flow analysis system
… concentration levels of phosphate employing the malachite green spectrophotometric method. The novel flow detector employed within this manifold is a highly sensitive, low cost, miniaturized light emitting diode (LED) based flow detector, which achieved an improved LOD in comparison to a …
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Formation Mechanisms and Photocatalytic Properties of ZnO-Based Nanomaterials
… use as photocatalysts for the degradation of malachite green dye in water. Photocatalytic activity is studied as a function of morphology; and, the ZnO nanorods show enhanced photocatalytic activity for the degradation of the dye compared to hexagonal ZnO nanopyramids. After demonstrating the …
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