1. Imidazol-4-yl 2-Imidazoline Nitroxide Radicals, a New Class of Promising Contrast Agents for Magnetic Resonance Imaging

   • V. I. Ovcharenko
   • E. Yu. Fursova
   • A. A. Savelov

   Chemistry Pages: 171 - 173

2. Synthesis and Unusual [2 + 2] Cycloaddition Reactions of 1-Trifluoroacetyl-2-haloacetylenes

   • N. P. Tsvetkov
   • A. B. Koldobskii
   • V. N. Kalinin

   Chemistry Pages: 174 - 177

3. The Use of Ultrashort Monolithic Porous Columns and an Eluent Flow Gradient for Chromatographic Separation of Polyaromatic Hydrocarbons

   • P. N. Nesterenko
   • M. A. Rybalko

   Chemistry Pages: 178 - 181

4. Colloidal Structures in Soils

   • G. N. Fedotov
   • Yu. D. Tret'yakov
   • E. I. Pakhomov

   Chemistry Pages: 182 - 184

5. Effect of cis-trans Configuration of Phosphoryl Groups on the Extraction Ability of Bis(diisopropoxyphosphoryl)dibenzo-18-crown-6

   • V. V. Yakshin
   • O. M. Vilkova
   • B. F. Myasoedov

   Chemistry Pages: 185 - 188