Dipole moments and spatial structure of some trisarylselenomethanes

Conclusions Trisarylselenomethanes exist in a conformation with a gauche orientation of the three Ar-Se groups relative to the C-H bond of the central atom.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 436–438, February, 1977.     

Coherent production of particles by 67 GeV/c protons on emulsion nuclei

Coherent reactions were observed among one-, three- and may be five-prong interactions of 37 GeV/c protons in nuclear emulsion. Their cross sections were estimated and compared with other data on coherent production in emulsion.     

Investigation of inelastic interactions of 400 GeV protons with emulsion nuclei

The basic experimental characteristics of incoherent interactions of 400 GeV protons on emulsion nuclei, such as the multiplicity of charged secondaries, one-particle distributions and two-particle correlations, are reported and discussed in details. They are compared with the results of other experiments on hadron-nucleus interactions at lower energies. We have shown from both the quantitative and qualitative comparison of the data presented with predictions of various model approaches to nuclear production, that most of them cannot explain the complete set of experimental observations.An analysis of the experimental data presented gives strong support to the idea that the production mechanism in high-energy hadron-nucleus interactions has two or multi-component character.     

Synthesis of N1-methyldesthiobiotin

Conclusions N₁-Methyldesthiobiotin was synthesized by starting with the ethyl ester of-ketodehydrodesthiobiotin.We express our gratitude to prof. V. V. Filippov for testing (III) for biotin activity.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1416–1418, June, 1973.