The paper presents spectral studies of some unsymmetrical A(3)B tetrapyrrolic, porphyrin-type complexes with Cu(II) and Zn(II) in different solvents and micellar media aimed at estimating their properties in connection with the living cell. The results indicate that the position of the absorption and emission peaks is mostly influenced by the central metal ion and less by the environmental pola...

The coupling of structural fluctuation and the dynamics of associated water molecules of biological macromolecules is vital for various biological activities. Although a number of molecular dynamics (MD) studies on proteins/DNA predicted the importance of such coupling, experimental evidence of variation of hydration dynamics with controlled structural fluctuation even in model macromolecule is...

Amphiphilic compounds dissolved in nonpolar organic solvents form inverted micelles whose aqueous centers can solubilize relatively large amounts of enzymes. The solutions are homogeneous and optically transparent and have low viscosity and freezing points; they provide unique and favorable systems to perform the main cryoenzymologic studies previously carried out in mixed solvents. The prepara...

Glycerol-fatty acid esterification has been conducted with lipase from R. delemar in water/AOT/isooctane reverse micellar media, with the major product being l-monoglyceride, a useful food-emulsifier. 1,3-Diglyceride was also synthesized, but to a much lesser extent. For a given set of initial conditions, the reaction productivity, measured in terms of the initial product formation rate, Vo, an...

The oxygen scavenging of C-centered radicals in microheterogeneous media was studied by investigation of the photolysis of several ketones (dibenzyl ketone (DBK), oand p-methyldibenzyl ketone (o-MeDBK andp-MeDBK) and d,l-2,4-diphenyipentan-3-one (d,~-DPP)) in oxygen-saturated sodium dodecylsulfate (SDS) micellar solution. The acyland benzyl-type radicals initially formed during the photolysis o...

Reverse micellar systems are nanofluids with unique properties that make them attractive in high selectivity separation processes, especially for biological compounds. Understanding the phase behavior and thermodynamic properties of these nanosystems is the first step in process design. Separation of components by these nanosystems is performed upon contact of aqueous and reverse micellar phase...

The simple hydrodynamic description of bimolecular collision rate constants afforded by the Stokes-EinsteinSmoluchowski (SES) equation is tested in a bulk liquid as well as in sodium dodecyl sulfate micelles. Fluorescence quenching of pyrene by three different quenchers is used as a model to study collision rate constants. One quencher is itself a cationic surfactant, one an uncharged long alky...

Reserpine a well known phytochemical molecule found in the dried roots of plants such as Rauwolfia Serpentina and Rauwolfia Vomitoria. It is a hypertension drug molecule used in drug formulation. Reserpine ranks as one of the most complex natural product of its size and contains 21 skeletal atoms compactly arranged in five rings. The stereo chemical complexity and biological significance of Res...

The synthesis of polyol-fatty acid esters has strong implications in such industries as foods, cosmetics, and polymers. We have investigated these esterification reactions employing the polyols ethylene glycol, 2-monoglyceride, and sugars and their derivatives with the biocatalyst lipase in water/AOT/isooctane reverse micellar media. For the first reaction, 50-60% conversion was achieved and pr...