Investigation of unsaturated lactones

Transesterification with subsequent cyclization to 4-carbethoxy-5,6,6-trialkyl-3-hydro-2-pyrones occurs during condensation of -keto alcohols with diethyl succinate. 4-Carbethoxy-5,6,6-trimethyl-3-hydro-2-pyrone was obtained by reaction of dimethylethynylcarbinol with the ethyl ester of succinic acid monochloride and subsequent hydration of the acetylenic ester and cyclization.See [1] for communication XXIII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1604–1607, December, 1973.     

Energy losses of a charged particle in a plasma in the presence of a strong electric field as a function of the sign of the charge

Institute of Radiophysics and Electronics, Academy of Sciences of the Armenian SSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 34, No. 4, pp. 347–351, April, 1991.     

Spectral investigation of a mixed isonitrile-carbonyl extracomplex of meso-tetraphenylporphyrinatoiron(II) at low temperatures

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 53, No. 3, pp. 421–426, September, 1990.     

On the Nature of Stimulated Emission in ZnO in a Wide Temperature Range

Physics of the Solid State - We studied the near-edge emission of MBE ZnO films in wide ranges of excitation intensity (up to 1000 kW/cm2) and temperatures (5–300 K). The manifestations of...     

Synthesis and catalytic properties of niobium indenyl peroxo complexes

Synthesis of four niobium sandwich peroxo complexes containing fragments of substituted indenes was performed and their structure was proved by NMR spectroscopy and ESI-MS mass spectrometry. Catalytic activity of the complexes in the oxidation of sulfides with hydrogen peroxide was studied, and a high selectivity in the oxidation of sulfides to sulfoxides and sulfones of the sandwich peroxo complexes was found.     

Two-mode squeezed vacuum states in tomographic-probability representation

The two-mode quantum electromagnetic field in the vacuum squeezed state is considered in the tomographic-probability representation. The symplectic, center-of-mass, and photon-number tomograms for the two-mode vacuum squeezed state are obtained explicitly. The expressions for photon statistics of the squeezed light are reconsidered using the state tomograms, and some new integral relations are found for one and multimode orthogonal polynomials.     

Optimization of the Normal Mode Spectrum of Linear Ion Crystals in Paul Traps for EIT Cooling Using an Optical Lattice

JETP Letters - Ions in radio-frequency traps are widely used in various fields of applied and fundamental physics, such as metrology and quantum computing. One of the important tasks required for...