Prof. Vitaly I. Volkov PROFESSIONAL ACHIEVEMENTS The concept of polymeric ion-exchange and porous membrane function on a microscopic level was developed and applied to interpreting membrane electrochemistry, catalysis, selective liquid and gas separation, and some other membrane phenomena. Magnetic resonance techniques based on electron spin resonance, electron-nuclear double resonance, high-resolution NMR, and pulsed NMR were developed for polymeric and biological membrane investigations. The nature of free radicals in ion-exchangers was studied using electron spin-resonance techniques. The structure and mobilities of paramagnetic ion complexes in polyampholites were investigated by electron spin and electron-nuclear double resonances. Magnetic resonance techniques were applied for adsorption, catalysis, diffusion and other physical chemistry membrane processes. The interconnection between membrane structure, the interaction of a diffusate-polymeric matrix and the translational diffusion stages in different spatial scales was established, and the nature of ionic and molecular selectivity on the microlevel in ion-exchange membranes was assessed. The self-diffusion of water, alcohols, water-ethanol mixtures Li+, Na+, Cs+ cations and F- anions in membranes containing sulfo-, carboxyl-, amide- and amino-groups was investigated using the pulsed-field gradient NMR (PFG NMR) technique. The pore structure of track-etched membranes (nuclear filters) was investigated via PFG NMR.