The increasing use of synthetic dyes is alarming and their discharge as textile waste may cause substantial ecological damage. Biological decolorization of dye using microorganisms is an environmentally friendly and costcompetitive alternative to chemical methods. This study involves the application of laccase obtained from Pleurotus ostreatus, a common fungus, in decolorization and degradation...

The interaction between methyl red (azo dye) and cetylpyridinium chloride (cationic surfactant) in the methanol-water system were studied using a spectrophotometric technique. Variable parameters like constant dye concentration its structure, surfactant concentration, pH, absorbance, solvent composition studied. Using UV-Vis technique, critical micelle concentrations (CMCs) of measured with red...

Variations in the composition of the diet influence the rate of appearance of liver tumors in rats fed certain azo dyes. The effective dietary factors and possible mechanisms involved have been reviewed by Rusch, Baumann, Miller, and Kline (14); as yet no generally accepted explanation has been advanced either for the mode of carcinogenic action or for the means by which diet affects it. It has...

Variations in the composition of the diet influence the rate of appearance of liver tumors in rats fed certain azo dyes. The effective dietary factors and possible mechanisms involved have been reviewed by Rusch, Baumann, Miller, and Kline (14); as yet no generally accepted explanation has been advanced either for the mode of carcinogenic action or for the means by which diet affects it. It has...

Recovered papers contain several chromophores, such as wood lignin and dyes. These have to be eliminated during paper recycling in order to produce white paper. Hydrogen peroxide under alkaline conditions is generally used to decolorize lignin, but its effect on dyes is limited. Copper(II)-phenanthroline (Cu-Phen) complexes can activate the oxidation of lignin by hydrogen peroxide. Hydrogen per...

During carcinogenesis in rat liver by 3'-methyl-4-dimethylaminoazobenzene, the two moieties of the principal liver carcinogen-protein complex have considerably different turnover rates. With continued ingestion of the azocarcinogen by rats, the bound azo dye in the complex has a half-life of 2.5 +/- 0.25 (SD) days, while the protein moiety has a half-life of 8.7 +/- 1.6 days (probability of ide...

By 1935, various investigators (9) principally Kinosita and his co-workers had established the hepato-carcinogenic activity of o-aminoazotoluene and N,N-dimethyl-p-aminoazobenzene. These azo dyes, administered in the diet or by subcutaneous injection, elicit changes--including neoplasms--in the livers of rats and mice and perhaps in the livers of other species. Subsequently it was established t...

Variations in the composition of the diet influence the rate of appearance of liver tumors in rats fed certain azo dyes. The effective dietary factors and possible mechanisms involved have been reviewed by Rusch, Baumann, Miller, and Kline (14); as yet no generally accepted explanation has been advanced either for the mode of carcinogenic action or for the means by which diet affects it. It has...

Decolorization of synthetic azo dye solution of Congo red dye, as an anionic dye was studied in a batch reactor using Advanced Oxidation Process (AOP). Congo red has been selected amongst azo dyes due to its high solubility in aquatic environment. AOP is effectively removing color in azo dye wastewater due to its strong oxidizing property by breaking down the functional group that impacting col...