A method for calculating above-threshold multiphoton processes in atoms: Polarizability of alkali-metal and noble gas atoms

A technique for calculating above-threshold bound-bound transitions of an atomic optical electron, based on the use of generalized Sturm expansion of the Green’s function for a potential with a Coulomb asymptotics has been developed within the model-potential method. The dynamic polarizabilities of alkali-metal and noble gas atoms are calculated in the frequency range above the ionization threshold.     

Dynamics of Josephson Junction under “Green” Noise

The stochastic dynamics of the Josephson junction is studied when external noise is nonwhite and high-pass filtered (green noise). In this case the diffusion coefficient of the Fokker-Planck equation is zero. Therefore the phase locking between the wave functions of the Cooper pairs is described and interpreted by the Krylov-Bogoljubov averaging method. The maximum (critical) Josephson current is redefined. Nonlinear diffusion and the lifetime of the phase locking of wave functions are considered. Background illumination, zero-point fluctuations and filtered white noise are used as examples of green noise. It is shown that the effect of green noise on the superconducting state of the junction is much less destructive than that of white one.     

Mass spectrometry of glycosides of oleanolic acid

Conclusions The mass spectra of oligosides of oleanolic acid were studied. The site of addition of the carbohydrate component to the oleanolic acid residue, the nature of the substituting sugars, and the position of the glycoside bonds between them can be determined according to their nature.For communication 1, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 113–121, January, 1974.     

New derivatives of 3,3,3-trinitro-1-aminopropane and their nitrolysis

Conclusions We developed some new directions for the condensation of dinitromethane with formaldehyde and 3,3,3-trinitro-1-aminopropane as a function of the reaction conditions.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1366–1369, June, 1973.The authors wish to thank G. V. Lagodzinskii for assistance in identifying the compounds by the NMR method.     

Structure Formation in Carbon Fibers in the Course of Flash High-Temperature Treatment

The size of coherent scattering regions formed in carbon fibers was studied as influenced by the preparation conditions of the initial polyacrylonitrile thread and conditions of preliminary (200°C) and flash high-temperature (2400 and 3200°C) thermomechanical treatments.     

Synthesis of macrolide antibiotics. Communication 8. Synthesis of acyclic forms of C9-C13 fragment of erythronolide B

Conclusions A synthesis of three acyclic forms of the C⁹-C¹³ fragment of erythronolide B has been carried out.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1166–1172, May, 1985.     

Synthesis of macrolide antibiotics Communication 4. Synthesis of the C11-C13 fragment of narbomycin

Conclusions The synthesis has been effected from 1,6-anhydro--D-glucopyranose (10 steps, overall yield 28.9%) of the C¹¹-C¹³ fragment of narbomycin, a polychiral 14-membered macrolide antiobiotic.For communication 3, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2572–2575, November, 1982.