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The paper presents an ontological model for planning urban areas with a given level of economic efficiency, the use of which can provide optimal configurations of future neighbourhoods for all participants in their construction and operation. The implementation of intelligent systems based on the algorithms of the proposed model can provide optimal configurations of future neighborhoods for all parties involved in their construction and operation

A general approach for mapping local p[K.sub.a] values of protein side chains with spin labeling EPR is described. The results showed that the high accuracy of p[K.sub.a] determination for pH-sensitive nitroxides is achieved irrespective of the frequency of measurements or the regime of spin exchange.

Mechanistic studies are performed on the reaction of PBN with the physiologically relevant glutathiyl radical formed upon oxidation of the intracellular antioxidant, glutathione (GSH). Reverse decomposition of the paramagnetic PBN-glutathiyl radical adduct to the nitrone and thiyl radical is seen for the first time.

The effect of the spin-labeled arene is analyzed by synthesizing a series of compounds with the general structure 'stable 3-imidazoline radical-two-carbon bridge-naphthalene' as well as their diamagnetic analogues. The studies have shown that the energy released upon recombination is spent in radiationless processes of chemical transformations both at the stage of the radical ion and at the stage of the electronically excited molecule.

Time-resolved chemically induced dynamic nuclear polarization (TR-CIDNP) and laser flash photolysis (LFP) methods are used to measure rate constants for coupling between acrylate-type radicals and a series of newly synthesized stable imidazolidine N-oxyl radicals. The carbon-centered radicals are generated in the presence of the stable nitroxides by laser flash photolysis of the corresponding ketone precursors RC(O)R.

The reactions of the reversible additions of thiols and thiyl radicals to the nitrone spin traps DMPO (5,5-dimethyl 1- pyrroline N-oxide) and DEPMPO (5-diethoxyphosphoryl -5- methyl -1- pyrroline N-oxide) are described.

A general method of measuring local pK values of peptides with high-field EPR using methane-thiosulphonate derivatives of imidazolidine nitroxides is described. Differentiating polarity and proton exchange effects using A(sub iso) versus g(sub iso) relationship plots generated from high-field EPR are reported.

An investigation was conducted to examine the synthesis of a spin-labeled stacking polymer from Ni(II) and Pd(II) complexes and to analyze the magnetic properties of these complexes. These metal complexes carried a stable nitroxide 2,2,5,5-tetramethyl-l-oxylpyrrolidine-3,4-dione dioxime. The investigation revealed a layered polymeric structure of the solids which could be attributed to the formation of exchange cluster which contained a diamagnetic metal ion property.

Tert-butyl diphenylmethyl nitroxide (compound L) is the first new metal-complex forming member of the alpha-H containing nitroxide group of chemicals. Its coordination properties are in line with other fully alpha-substituted analogs, but it is very stable and the coordination center is more accessible than the other analogs. When compound L is reacted with with bis (1,1,1,5,5,5,-hexafluoro-2,4-pentanedionato) copper(II) hydrate, or Cu(hfac)2H2O, a stable mixed-ligand complex of Cu(hfac)2L is produced. The complex forms needle-like crystals and is diamagnetic at room temperature.