Liquid crystal photo-alignment using azo-dyes for display and photonics applications is discussed. Various types of the glass and plastic substrates are used. Special types of 3D LC alignment, LC alignment inside thin micro tubes, and LC cladding layers in Si based waveguides and grating surface are concerned. The azo-dye photoalignment of polymerized LC films used as optical elements, such as ...

Magnetic g-Fe2O3@SiO2 core-shell nanocomposite was prepared using Stöber method and functionalized firstly by isopropenyloxytrimethylsilane as a coupling agent to enter active acetylacetone on the surface of nanoparticles, after that synthesized azo dye ligand, 2-(2-benzothiazolyl azo)-4-methoxyaniline. In such way, g-Fe2O3@SiO2-azo hybrid formed. The structure evidenced physical chemical analy...

INTRODUCTION Miller and Miller (3) showed that the carcino genic dye, 4-dimethylaminoazobenzene, is firmly bound to protein constituents of the rat liver. Such protein-binding reaches a maximum after 4-6 weeks on the azo diet, whereas the neoplasm arises several weeks later. Moreover, the neoplastic tis sue contains essentially no protein-bound dye. Hence, Miller and Miller (3) have postulated ...

a convenient, one-pot method for the synthesis of diazonium salt has been developed by the sequential diazotization of aromatic amines with nano2, polymer- supported periodic acid (ppia) and 2-naphthole under solvent-free conditions at room temperature. by using this method, several types of aromatic amine, containing electron-withdrawing and electron-donating groups, were rapidly converted to ...

BACKGROUND Many dyes can be considered emerging contaminants. The most widely used dyes belong to the class of azo compounds, some of which are known to have toxic and genotoxic properties. They are used in great quantities in textile activities and are of environmental concern because of their potential discharge in water. Planarians have been successfully used as test organisms in hazard eval...

Major part of the aesthetics and beauty idols, textiles, paper, paintings industries, etc. finds its roots in use colours (azo compound). These synthetic dyes can not degrade easily by physical chemical means are toxic for environment animals including humans. Even if they get degraded, it becomes difficult to rid secondary products. Microbes especially bacteria be used which results cheap, eco...

In present study the photocatalytic degradation of commercial azo dye Direct Red 5B (DR5B dye) has been carried out in presence of recently developed photocatalyst: methylene Blue immobilized resin Dowex-11, under visible light. The effect of process parameters such as variation of the dye concentration, pH, light intensity and amount of catalyst loading on the reaction rate has been studied .T...

Bobb, Dolores (Palo Alto Medical Research Foundation, Palo Alto, Calif.), Dorothy Liebes, and David A. Salzberg. Effect of azo dyes on growth and metabolism of Neurospora crassa. I. Relative resistance of Neurospora strains to azo dye inhibition. J. Bacteriol. 84:242-249. 1962.-Under conditions where growth factors were not limiting, 3'-methyl-4-monoaminoazobenzene, a rat hepatocarcinogen, inhi...

Background & Aims of the Study: Azo Dyes are the most hazardous materials in different industries. Dyes and pigments used in industries for applications such as textiles, leathers, papers, foodstuffs, additives, etc. Application amounts of azo dyes in industries which can cause severe health problems in human and environmental pollutant problems. So, color wastewaters decomposition plan are...