Congo red is a synthetic azo-dye dye with many industrial applications. The effluents containing azo dyes are causing several environmental hazards and thus should be treated prior to their discharge. The present work investigates the possible use of a novel microbial consortium from sheep compost for the decolorization of Congo red dye. The effect of different parameters including contact time...

Introduction Azo dyes – a fatal threat or a new generation of drugs? In 1858 Griss developed the azo coupling reaction and obtained first azo dye – Aniline Yellow. Nowadays, around 10 thousands of these compounds are described and more than 2 thousands are applied to color various materials. Azo dyes are characterized by the presence of the azo moiety (–N=N–) in their structure, conjugated with...

SUMMARY One intraperitoneal injection of 1 mg of 3-methylchol anthrene into immature male and female rats results in an increase in azo dye demethylase activity. This is followed by an increase in wet and dry liver weight and in total protein, which reaches a peak of about 30†" 40% above control levels within 3 or 4 days. Cell proliferation contributes to the in crease in liver weight and pro...

the early stages of liver carcinoma development in Sprague-Dawley rats. Bile acids were analyzed in urine and feces of azo dye-fed and control rats with the use of gas chromatography during the first 66 days of treatment. Seven bile acids were identified in the feces, with deoxycholic acid being the primary excretion product. During the first 36 days of 3'-methyl-4-dimethylaminoazobenzene feedi...

Responsive systems sensitive to near-infrared (NIR) light are promising for triggered release due to efficient deep tissue penetration of NIR irradiation relative to higher energy sources (e.g., UV), allowing for spatiotemporal control over triggering events with minimal potential for tissue damage. Herein, we report star polymers containing thermally-labile azo linkages that dissociate during ...

considered the possibility of the transformation of the oval cells into hepatocytes (5, 16, 21, 31), but many others were not in agreement as to the existence of such transformation and rather considered the cells to disappear by cell death and removal (9, 22, 23, 25, 26). Inaoka (1 1), in our laboratory, examining the early stage of azo dye hepatocarcinogenesis in rats, concluded that the oval...

Reactivity and mass loss are considered mutually exclusive in conventional zero-valent metal (ZVM) technology to treat environmental contaminants. Here, we report the outstanding performance of Co-based metallic glass (MG) in degrading an aqueous solution of azo dye, thus eliminating this trade-off. Ball-milled Co-based MG powders completely degrade Acid Orange II at an ultrafast rate. The surf...

Lasing in induced cholesteric liquid crystal (CLC) containing highly photosensitive azo chiral dopant (ChD) and pyrromethene laser dye was investigated. Due to the absence of excitation energy transfer from the dye molecules to the molecules of ChD in such a system, a low lasing threshold was achieved. When using violet and green light-emitting diodes, reversible frequency tuning was obtained i...

The study was designed for isolation and characterization of azo dye decolourizing bacteria which is a prerequisite for developing a microorganism-facilitated treatment of polluting dyes. In this study nine types of bacteria which were able to decolourize three types of azo dyes (Blue H/C, Red 3B and Yellow 3R dye) were isolated from textile effluents collected from Gazipur industrial area in B...

We study azimuthal gliding of the easy axis that occurs in nematic liquid crystals brought in contact with the photoaligned substrate (initially irradiated azo-dye film) under the action of reorienting UV light combined with in-plane electric field. For irradiation with the linearly polarized light, dynamics of easy axis reorientation is found to be faster as compared to the case of nonpolarize...