Such dyes are really artificial amino acids. A large number of polyanionic dyes have been isolated and synthesised in vitro by interactions of simple anionic dyes. These complex dyes are, in effect, artificial peptides or simple synthetic proteins. Structural examples show their molecules to contain...
2.2.2Anionic Surfactants Surfactants with a negative charge on the head group are called “anionic.” Common examples are sodium salts of fatty acids and fatty sulfates, includingsodium lauryl sulfate. Typically, sodium, potassium, or ammonium salts of fattysulfonateswith C8–C14 acyl chains tend t...
Majority of industries dumped untreated water directly into water bodies, thus contaminating it with toxic metals, dyes, pesticides and insecticides1,2,3. The severity of water pollution is scaling up steadily thus making it one of the major issues to be solved by the urban world. Water polluti...
Synthetic dyes are used in numerous manufacturing processes as pesticides, varnish, petrochemical, electroplating, and food industries. Their discharge without any treatment leads to a series of environmental problems and growing global concerns5,6. These dyes are non-biodegradable in the aquatic systems...
has led to the spread of toxic and carcinogenic compounds in aquatic bodies. This continuous discharging of effluents would affect human health and environmental equilibrium1,2. Hazardous organic and inorganic wastes such as dyes and heavy metals, have toxic effects and may even cause cancer. So,...
In a batch mode reactor, crystal violet (CV) and reactive yellow 145 (RY) were chosen as examples of cationic and anionic dyes, respectively, to study the adsorption properties of the prepared samples. The experiments for CV or RY adsorption were conducted by adding the adsorbent to dye solut...
The spectral changes of organic solutions of N,N,N′,N′-tetramethylenediaminoacetylacetonatocopper(II) perchlorate and a merocyanine dye in the presence of NaI or LiClO4 provide examples of anionic and cationic halochromism, respectively. The observed changes are interpreted as arising from all po...
A process for dyeing wool-containing fibre materials with anionic dyes, which comprises dyeing said materials in the presence of a wool protective agent which is a reaction product of an epihalohydrin
The composition of the present invention may also include in addition to the foam profile regulating compounds and conventional anionic detergent compositions builders, brighteners, hydrotropes, germicides, soil suspending agents, anti-redeposition agents, antioxidants, bleaches, coloring materials (dyes an...
Examples of the low-molecular weight compounds referred to herein include the compounds represented by the following formulae: ##STR3## In this case, the amount of the bonding agent to be used is preferably 30 to 90 parts by weight per 100 parts by weight of the total of the low-molecul...