zno and tio2 nanoparticles wereimpregnated with merbromin dye and used as modified photocatalysts for degradation of phenol. dye-modified zno and tio2 showed significantly higher photocatalytic activity than neat zno and tio2 under visible light illumination. moreover, the prepared dye-modified zno showed superior photocatalytic efficiency in degradation of phenol compared to the dye-modified t...

The walnut green hull is an agro-waste, a source of natural dye and volatile compounds with various biological activities, but the main challenge conventional extraction method quality quantity compound (dye) from waste. objective this research work to use microwave-assisted (MAE) as emerging technology. Further, MAE process was optimized using Box–Behnken Design (BBD) response surface methodol...

A simple and fast Cloud Point Extraction (CPE) preconcentration of Acid Blue 29 (AB 29) dye was developed prior to its spectrophotometric determination. The suggested procedure successfully applied for the determination AB in different water samples with high recoveries. Optimization experimental conditions such as surfactant type volume, pH, stirring, centrifugation were studied. effect interf...

Natural dyes are emerging globally as eco-friendly synthetic colorant. dyeing is process of applying coloring matter directly on fiber, yarn or fabric without any additives. Butea monosperma (Lam.)Taub. one most important ornamental plants mainly grow in forest and rich orange pigments. In the present study, pigments naturally drop flowers (Lam.) Taub. Extraction by using four different Mordant...

The results 1 from measurements made with the glass electrode and spectrophotometer show that brilliant cresyl blue penetrates as free base into the vacuoles of living cells of Nitella. The present paper describes similar experiments with azure B, methylene blue, and crystal violet. Since the methods for the condition of cells, extraction of the sap, penetration experiments, extraction of free ...

The existing rapid method for the determination of anionic surfactants in aqueous solutions relies on the association of the cationic methylene blue dye with the anionic surfactant to form an electroneutral complex that is subsequently extracted into chloroform and determined spectrophotometrically. This methylene blue active substance (MBAS) assay suffers from salt interference in estuarine an...

The study of zinc metabolism in experimental animals and humans is dependent upon a reliable analytical method. Numerous methods, gravimetric, turbidimetric, and calorimetric (l), have been tried and found wanting. Fischer (2) first introduced diphenylthiocarbazone (dithizone) for the analysis of metals with relation to industrial processes. This organic dye combines with a number of the heavy ...