Results 201 to 210 of about 47,888 (260)
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Degradation of azo dyes by algae
Environmental Pollution, 1992The degradation of azo dyes by algae was evaluated and it was found that certain algae can degrade a number of azo dyes to some extent. The reduction rate appears to be related to the molecular structure of the dyes and the species of algae used. The azo reductase of algae is responsible for degrading azo dyes into aromatic amine by breaking the azo ...
L, Jinqi, L, Houtian
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Bioreactors for Azo-Dye Conversion
2010This chapter embodies two sections. In the first section a survey of the state of the art of azo-dye conversion by means of bacteria is presented, with a focus on reactor design and operational issues. The relevance of thorough characterization of reaction kinetics and yields is discussed.
OLIVIERI, GIUSEPPE +3 more
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Dyes and Pigments, 2016
Abstract Any liquid azo dyes, in which auxochrome such as dialkylamino, alkoxy, and amino group is attached in a molecule, were produced. In a series of 2-alkyl-4’-(dimethylamino)azobenzenes, the butyl, hexyl, octyl, and dodecyl derivatives were liquid at room temperature, whereas the propyl, 1-methylethyl, 1-methylpropyl, 1,1-dimethylethyl, and ...
Siddanagouda Biradar +7 more
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Abstract Any liquid azo dyes, in which auxochrome such as dialkylamino, alkoxy, and amino group is attached in a molecule, were produced. In a series of 2-alkyl-4’-(dimethylamino)azobenzenes, the butyl, hexyl, octyl, and dodecyl derivatives were liquid at room temperature, whereas the propyl, 1-methylethyl, 1-methylpropyl, 1,1-dimethylethyl, and ...
Siddanagouda Biradar +7 more
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Journal of the Society of Dyers and Colourists, 1956
Twenty‐one water‐soluble azo dyes– mono‐, bis‐, tris‐, and tetrakis‐azo, selected from the acid, basic, mordant, and direct dyeing classes–have been examined by polarographic methods. The object was to determine how far these methods could be used for the identification and estimation of azo dyes in general.
J. DE O. CABRAL, H. A. TURNER
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Twenty‐one water‐soluble azo dyes– mono‐, bis‐, tris‐, and tetrakis‐azo, selected from the acid, basic, mordant, and direct dyeing classes–have been examined by polarographic methods. The object was to determine how far these methods could be used for the identification and estimation of azo dyes in general.
J. DE O. CABRAL, H. A. TURNER
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Decolorization of Azo Dyes in Bioelectrochemical Systems
Environmental Science & Technology, 2009Azo dyes are ubiquitously used in the textile industry. These dyes need to be removed from the effluent prior to discharge to sewage due to their intense color and toxicity. In this study we investigated the use of a bioelectrochemical system (BES) to abioticlly cathodic decolorization of a model azo dye, Acid Orange 7 (AO7), where the process was ...
Mu, Yang +4 more
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2010
Biodegradation is a cost-effective method to remove the residues of azo dyes prior to their discharge in wastewater streams from dye product industries. The efficacy of this treatment method is highly dependent on establishing an effective degrader community and maintaining environmental conditions that support the growth and activity of the degrader ...
Azeem Khalid +2 more
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Biodegradation is a cost-effective method to remove the residues of azo dyes prior to their discharge in wastewater streams from dye product industries. The efficacy of this treatment method is highly dependent on establishing an effective degrader community and maintaining environmental conditions that support the growth and activity of the degrader ...
Azeem Khalid +2 more
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Heterocyclic azo dyes. IV. Azo Dyes Containing the Quinoline Nucleus
Journal für Praktische Chemie, 1973AbstractThe synthesis, some dyeing and fastness properties of several new monoazo dyes derived from 6‐amino‐ and 6‐hydroxy‐quinolines when applied as dispersed dyes on nylon 6 are described. Preliminary correlations between light fastness and chemical structure are attempted.
M. Kamel +2 more
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The significance of azo-reduction in the mutagenesis and carcinogenesis of azo dyes
Mutation Research/Reviews in Genetic Toxicology, 1983Azo dyes are widely used in textile, printing, cosmetic, drug and food-processing industries. They are also used extensively in laboratories as either biological stains or pH indicators. The extent of such use is related to the degree of industrialization.
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Acta Polymerica, 1987
AbstractA series of new polymerizable azo dyes containing the methacryloyloxy group were prepared. Their melting points, yield, colour, solubility and absorption in the UV‐visible range were characterized, and the relationship between their properties and structure was evaluated. The characteristics of radical homopolymerization of one of the azo dyes,
F. Hrabák +5 more
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AbstractA series of new polymerizable azo dyes containing the methacryloyloxy group were prepared. Their melting points, yield, colour, solubility and absorption in the UV‐visible range were characterized, and the relationship between their properties and structure was evaluated. The characteristics of radical homopolymerization of one of the azo dyes,
F. Hrabák +5 more
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Spectroscopic ellipsometry investigation of azo dye and azo dye doped polymer
The European Physical Journal Applied Physics, 2006The optical constants of azo dye (Methyl Red (MR)) and azo dye doped polymer (ADP) (Polymethylmethacrylate (PMMA)) MR/PMMA have been investigated using Variable Angle Spectroscopic Ellipsometry (VASE). Pure MR was modeled using Lorentz formula with three oscillators. A Bruggmann effective medium approximation layer was employed with three constituents (
O. Taqatqa, H. Al Attar
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