Solution of some problems of particle motion in a gas stream

The problem of designing the contour of an optimum nozzle for particle acceleration is considered in the one-dimensional formulation. In [1] a similar problem was solved in the general formulation using a numerical method. Here, in contrast to [1], the solution is obtained in analytic form for the particular case of low particle concentration. The problem of the motion of a particle in a uniform stream is solved in the same form. Moscow. Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 86–90, September–October, 1988.     

1,3,5-triphenylbenzene as unexpected by-product in the synthesis of 2,5-diphenylpyrrole from acetophenone oxime and phenylacetylene

Russian Journal of Organic Chemistry -     

Synthesis of 19,B-Bisnoranalogs of Steroid Androgens with cis-Fused B and C Rings

Reduction by Birch procedure of 3-methoxy-B-nor-8-isoestra-1,3,5(10)-trienes followed by hydrolysis of reaction products furnished 19,B-bisnor-8,10-isoanalogs of steroid androgens. With the use of the correlation NMR spectroscopy a complete assignment of signals in the ¹H and ¹³C NMR spectra was performed for two representatives of this steroid group, and their prevailing conformations in solution were established.     

Beryllium as a Material for Thermally Stable X-Ray Mirrors

Technical Physics - Thermophysical and mechanical characteristics of beryllium are compared with the corresponding characteristics of promising materials that are used for fabrication of precision...