منابع مشابه
Ultrafast energy transfer in water-AOT reverse micelles.
A spectroscopic investigation of the vibrational dynamics of water in a geometrically confined environment is presented. Reverse micelles of the ternary microemulsion H2O/AOT/n-octane (AOT = bis-2-ethylhexyl sulfosuccinate or aerosol-OT) with diameters ranging from 1 to 10 nm are used as a model system for nanoscopic water droplets surrounded by a soft-matter boundary. Femtosecond nonlinear inf...
متن کاملProton transfer in ionic and neutral reverse micelles.
Proton-transfer kinetics in both ionic and neutral reverse micelles were studied by time-correlated single-photon counting investigations of the fluorescent photoacid 8-hydroxypyrene-1,3,6-trisulfonate (HPTS). Orientational dynamics of dissolved probe molecules in the water pools of the reverse micelles were also investigated by time-dependent fluorescence anisotropy measurements of MPTS, the m...
متن کاملEnzyme reactions in reverse micelles
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...
متن کاملPhotophysical Processes of Ethidium Bromide in Micelles and Reverse Micelles
Photophysical processes of ethidium bromide (EB) in homogeneous solutions, micelles, and reverse micelles have been investigated. In acetonitrile, the fluorescence intensity and lifetime of EB are 6.3 ( 0.3 times those in water and 1.25 ( 0.1 times those in acetone. This is attributed to the weaker hydrogen-bond acceptor property of acetonitrile, compared to water and acetone. Addition of water...
متن کاملOverview of Reverse Osmosis for Chemical Engineers Part 1, Fundamentals of Membrane Mass Transfer
Reverse osmosis (RO). has become a standard unit operation in Chemical Engineering. This separation process can be used for a wide variety of applications including: desalination of sea water, treatment of industrial wastes, concentration of food products, and recovery of value materials from solution mixtures. In order to best utilize RO it is necessary to have a fundamental understanding of t...
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ژورنال
عنوان ژورنال: membrane
سال: 2000
ISSN: 0385-1036,1884-6440
DOI: 10.5360/membrane.25.11