Kinetics in microemulsion medium 2. Hydrolysis of p-nitrophenyl phosphate with alkaline phosphatase in w/o microemulsion medium using the surfactant AOT

Energetics of Micellization of Aerosol-OT in Binary Mixtures of Eucalyptus Oil with Butanol and Cinnamic Alcohol

“…In ternary mixtures, with water and oil, it may exhibit formation of microemulsion and lameller and liquid crystalline phases under specific environmental conditions. − The surfactant is nontoxic and, therefore, can be used in pharmaceutical and medicinal preparations. The formation, stability, and characterization of “biological microemulsions” using AOT and edible oils have been limitedly studied in the recent past. , In miceller enzymology, employment of reverse micelles of AOT has been found to be of great significance, and a number of studies in this area have appeared in the literature. − Although the basic understanding of the surface chemical properties of AOT in aqueous medium is fairly advanced, the knowledge of the thermodynamics of its micellization in nonaqueous media (both polar and apolar) is limited. In continuation of our studies on the energetics of micellization of AOT in both polar and apolar media as well as their binary mixtures, we have herein used eucalyptus oil (EO) in binary combinations with butanol (Bu) as well as cinnamic alcohol (CA).…”

Vertical Variation in Dissolved Alkaline Phosphatase Activity in a Shallow Eutrophic Lake Determined in Reverse Micelles

“…For enzymes derived from different organisms, the optiinuln pH is markedly different in reverse micelles. For example, alkaline phosphatase from E. coli showed maximum activity around pH 10 (Gupta et al 1994), but for the enzyme from Halobacterium salinarum, the optimum value was at pH 9 (Frutos et al 2000b). The difference in optimal pH which we observed further pointed to probable similarities or dissimilarities of origin of these enzymes in the different water strata.…”

Study of association thermodynamics between crystal violet and sodium bis(2‐ethylhexyl)sulfosuccinate and kinetics of basic fading of crystal violet in microemulsions

“…Reaction kinetics of basic hydrolysis of CV in microemulsions of water/AOT/n-decane and water/AOT/isooctane with constant AOT concentration being 0.4 mol L −1 was studied by kinetics mode of the spectrophotometer at ω = (5), 8,10,13,15,18,20,23, and 25. The absorbance measurements of CV in the microemulsion reaction media were carried out at λ max = 600 nm and automatically with an interval of about 30 s in a period of time of about 20 min after the reaction was started.…”

“…A microemulsion droplet of water in oil can be considered as a microreactor that provides special medium and enhances or retards reaction rates [10][11][12][13][14][15][16][17][18]. Since the parameters such as the water pool size, the nature and the concentration of surfactants, and the pH of the water pool can be easily adjusted, the interior water pool of reverse microemulsion is a desirable microreactor where chemical reactions take place.…”