Enzyme reactions are important not only in life processes but also for the commercial production of various chemicals and foods. Many enzyme reactions of practical interest involve water-insoluble substrates and/or products. To improve the efficiencies of such reactions, one can exploit the system of reverse micelles to immobilize the enzymes and serve as a microheterogeneous reaction medium. E...

Diphenylcarbazone has been used for the simultaneous and individual determination of zinc(II) and cadmium(II) at trace levels. The carbazone complexes of zinc(II) and cadmium(II) at pH 7–10 are pink in color, and are soluble in TX-100 micellar media. Under optimum conditions, calibration graphs for individual and simultaneous determination by first, second, third and fourth derivative spectroph...

2014 The effect of molecular translational diffusion on the NMR linewidth and relaxation in lyotropic systems with finite aggregates has been studied. Here the molecular rotation induced by the translational motion of the molecule along a curved surface strongly modulates the intramolecular dipolar coupling. The corresponding autocorrelation functions are evaluated for rigid spherical, cylindri...

A stability-indicating micellar liquid chromatographic (MLC) method was developed and validated for the quantitative determination of timolol maleate (TM) in the presence of its degradation products resulting from accelerated degradation in a run time not more than 8 min. TM was subjected to stress conditions of hydrolysis (including alkaline, acidic and thermal hydrolysis) and oxidation. An is...

The lipophilic protein moieties of human low density lipoprotein, Semliii Forest virus envelope, and human erythrocyte stroma were obtained lipid-free with the use of sodium deoxycholate treatment and gel filtration in deoxycholatecontaining media. Detergent binding was determined by subjecting the proteins to gel filtration in the presence of micellar concentrations of radioactive deoxycholate...

A new experimental method for in vitro release studies of poorly soluble drugs from polymeric micelle systems was developed using a hydrotropic agent, sodium salicylate. It is difficult to maintain a good sink condition for poorly water-soluble drugs, such as paclitaxel (PTX), because of their low aqueous solubility. In this study, a good sink condition for PTX was achieved by using aqueous sod...

Among many ferromagnetic materials, CoPt alloy nanoparticles with high coercivity and small grain size are one of the potential candidates having its application in high-density storage media manufacturing. CoPt alloy nanoparticles of different compositions have been prepared in TX-100 micellar medium and capped with sodium oleate to prevent the agglomeration during annealing at high temperatur...

The thermoreversible fcc-bcc transition in concentrated block copolymer micellar solutions is shown to be driven by decreases in the aggregation number as the solvent penetrates the core, leading to a softer intermicelle potential. Small-angle neutron scattering measurements in a dilute solution are used to quantify the temperature-dependent micellar characteristics. The observed phase boundary...

The carbohydrate derived nonionic gemini surfactants have been emerged as a result of our present day interest in environmentally compatible chemicals. Reverse micelles formed by surfactants can be used for selective solubilization and reactions which exploit their nanometer size, micro-environments and mimics the membranous biological system. Novel carbohydrate based non-ionic gemini surfactan...

separation of some biogenic amines via rp-hplc using mixed micellar mobile phase was investigated. the compounds were derivatized before hand by dansyl chloride as a chromophoric reagent. appropriate conditions for separation, were determined by studying factors such as temperature, type and percentage of organic modifier, concentration of surfactants (sds and brij-35) and the ph of the mobile ...