In the present study, Chryseobacterium geocarposphaerae DD3 isolated from textile industry dye effluent in West Bengal, India, displayed significant tolerance to sulfonated di-azo Congo red (CR), up 500 ppm. The optimum decolourisation revealed that C. was capable of 96.52% 0.2 g L−1 CR within 12 h treatment presence 5 glucose as supplementary carbon source. Biodegradation analysis decolourised...

This paper reports on the presence of a strong binding site for the dye Biebrich Scarlet, (6-[Z-hydroxy-l-naphthyl]azo)3,4’-azodibenzene sulfonic acid, on cr-chymotrypsin. The 1: 1 protein-dye complex is characterized by a Kdiss of 8.8 f 0.1 X 10U5 M in 0.1 M phosphate buffer at pH 7.6 and W’. Complex formation is associated with a red shift in the visible spectrum of the dye, and a characteris...

Industrial dyeing processes produce a large amount of wastewater that contains many organic compounds such as different type of dyes and pigments, dispersing agents, surfactants which are difficult to treat. Considering that little studies have been done on biodegradation of oil-soluble azo dyes, the lake of this issue is completely felt. In this study, biotrea...

We report a holographically fabricated, optically switchable grating using azo-dye-doped, polymer-dispersed liquid crystals (LCs). Our experiments show that upon photoirradiation, the diffraction of the grating was decreased significantly. We believe that this switching behavior is due to two factors--nematic-isotropic phase transition of LCs and thermal expansion of the grating structure.

More durable (with high impact force), lighter, and more compact flexible azo dye micropolarizers are attractive candidates for low-cost, simple polarization imaging systems. The liquid crystal polymer (LCP), as an emerging material developed by photo-alignment technology, is a potential organizing the long-range ordered structure of dyes. However, little research has been done on LCP aligned T...

Biodegradation of Navy N5RL1, a widely used acidic azo dye in carpet industry, was studied by bacterial strain isolated from the dye-contaminated soil collected from a carpet industry premises located in Bhadohi, Sant Ravidas Nagar and Uttar Pradesh, India. The isolated strain was identified as Staphylococcus saprophyticus BHUSS X3 on the basis of morphological, biochemical and 16S rRNA gene se...

This paper reports on the presence of a strong binding site for the dye Biebrich Scarlet, (6-[Z-hydroxy-l-naphthyl]azo)3,4’-azodibenzene sulfonic acid, on cr-chymotrypsin. The 1: 1 protein-dye complex is characterized by a Kdiss of 8.8 f 0.1 X 10U5 M in 0.1 M phosphate buffer at pH 7.6 and W’. Complex formation is associated with a red shift in the visible spectrum of the dye, and a characteris...

Sudan-1 has been used for coloring food. However, recent alarms worldwide about the carcinogenic and mutagenic properties of azo-compounds have led to concerns over their human consumption. In the U.K. in 2005, over 570 products were found to be contaminated with the azo dye Sudan-1 and this and the health risks associated with this dye resulted in the subsequent international ban of this addit...

The functionalised metal-organic framework MIL-101(Cr)-NH(2), containing 2-aminobenzene-1,4-dicarboxylate as the linker, has been synthesised. A new tandem post-synthetic modification strategy involving diazotisation as the first step has been developed and used to introduce halo- and azo dye-functional groups into the pores.

Azo-dye was liberated from azocoll not only by proteolytic enzymes but also by albumin (serum or egg), a culture medium (papain digest of meat) or polyvinylpyrrolidone (PVP). Pretreatment of azocoll with papain and PVP increased the reactivity of azocoll to ƒÈ-toxin of Clostridium perfringens. A rapid and reliable assay method of ƒÈ-toxin and ƒÈ-antitoxin using the pretreated azocoll is described.