for the carcinogenic activity of the azo dyes re lated to 4-dimethylaminoazobenzene (DAB) has been well established (13, 15, 80, 31). Further more, the N-dimethyl and N-monomethyl dyes studied have essentially the same carcinogenic ac tivities, while the primary aminoazo dyes are much less active (5, 16) and apparently owe their carcinogenicity to a small amount of N-methyla tion in t@ivo(16). ...

The industrial waste water containing the various dyes is responsible for water pollution, due to their carcinogenic behaviour. Lots of investigations reported that 10-12% of dyes are used every year in textile industries such as Rose Bengal, Victoria blue, Thymol blue, Caramine, Indigo Red, Red 120, Rhodamine B, Methylene Blue, Eriochrome Black-T (EBT) [1-4] of which are major portion (20%) lo...

United States regulators are taking a closer look at the dyes that create those eye-catching colours in Froot Loops, Skittles and orange Fanta to determine if the artificial colorings contribute to hyperactive behavior in some children. Further study is needed on whether consuming artificial dyes can negatively affect children's behavior, a federal advisory panel indicated after two days of hea...

IKM Batik Nirmala is one of the IKMs located in Masaran center, was founded 2010 with a total 8 workers who produce an average 500 pieces batik each month, both printing, stamping and hand-drawn batik. The problem related to development green industry at how substitute environmentally friendly raw auxiliary materials, which by developing natural dyes so that it expected be able reduce potential...

Accurate mass measurements are used to both confirm the presence of a compound and help identify unknowns. Furthermore, high-mass accuracy enables the user to generate very narrow extracted ion chromatograms, enabling excellent quantitation. This application note describes the use of the Agilent liquid chromatograph/ mass selective detector time-of-flight (LC/MSD TOF) instrument to identify and...

Surfactant-dye interactions are very important in chemical and dyeing processes. The dyes interact strongly with surfactant and show new spectrophotometric properties, so the UV-vis absorption spectrophotometric method has been used to study this process and extract some thermodynamic parameters. In this work, the association equilibrium between ionic dyes and ionic surfactant were studied by a...

textile effluents contain different kinds of chemical dyes and many mutagenic and carcinogenic substances. discharge of these effluents into terrestrial and aquatic ecosystems causes harmful effects. in this research, decolorization of a textile effluent by nineteen different strains of fungi was investigated. removal activity of dyes was in order of   aspergillus > rhizopus > fuzarium > penici...

Fluorescent dyes emitting red light are frequently used in conventional and super-resolution microscopy of biological samples, although the variety of the useful dyes is limited. We describe the synthesis of rhodamine-based fluorescent dyes with absorption and emission maxima in the range of 621-637 and 644-660 nm, respectively and demonstrate their high performance in confocal and stimulated e...

background and objectives: synthetic dyes are recalcitrant to degradation and toxic to different organisms. decolorization of textile wastewaters is one of the major concerns since last decades. physical-chemical treatments are very expensive and frequently producing large amounts of toxic wastes. biological treatments can be more convenient. in the present study, an attempt has been made for d...