Path integral evaluation of the Eta function

In a three-dimensional model in which the gauge group does not commute with the Lorentz group, we demonstrate how the phase associated with the one-loop effective action (the function) can be computed by considering a quantum mechanical path integral.     

A study of the (Δ, C)-equivalence of certain numerical matrices

We study the properties of (,C)-transforms of numerical matrices. It is proved that the set of invertible -matrices for a fixed (x) forms a group. On the basis of the properties obtained it is proved that semiscalar equivalence of two nonsingular equivalent polynomial matrices with the same invariant factor is equivalent to the (, C)-equivalence of the matrices of values of the last rows of the left generators of these matrices in Smith form.Translated fromMatematicheskie Metody i Fiziko-Mekhanicheskie Polya, Issue 34, 1991, pp. 25–29.     

Use of synchronization methods for measurement of fluctuations in ultralow-noise solid-state microwave oscillators

The amplitude and frequency fluctuations of a synchronized oscillator and the fluctuations of the phase difference between input and output are examined. Synchronization methods are demonstrated for measurement of the frequency fluctuations of ultralow-noise low-power microwave oscillators, for which conventional methods are unsuitable. The methods are verified.Presented at All-Union Coordinating Conference Low-Frequency Noise in Semiconductor Devices (Chernogolovka, Moscow Region, June, 1991).St. Petersburg State Technical University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 36, No. 12, pp. 1153–1162, December, 1993.     

Unusual coordination of the in(3+) atom in the decahydrated complex Na3{In[N(CH2COO)3]2}·9H2O

All-Union Scientific-Research Institute of Chemical Reagents and Ultrapure Chemical Substances. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 2, pp. 163–166, March–April, 1991.     

Mössbauer spectroscopic investigations on the pressure (shock wave) dependence of phase generation and carbide precipitation in C80W2 steel

Results of phase generation and carbide formation after a shock wave treatment of the C80W2 steel are reported. It is shown that the reactions follow the energy supply to the steel by shock wave treatment.     

Solid-state thermal polymerization of the heterocyclic HC7N7 acid

The preparation of a new type of thermally stable (up to 385°C) heterocyclic polymer, containing a five-membered fused ring system, is described. The ultraviolet, visible, and infrared spectra indicate that this solid-state polymerization probably proceeds via formation of an azomethine-type intermolecular crosslink, rather than via opening of the C₄N₄ ring system. The reaction is facilitated by the presence of reactive protons, which act as an efficient catalyst for this nucleophilic addition to the nitrile group. It is suggested that this type of solid-state polymerization may possibly be carried out on a single HC₇N₇ crystal resulting in a fully ordered macroscopic polymer single crystal.     

Polysaccharides from the wastes of vegetable and melon-type crops

The water-soluble polysaccharides and pectin substances from the wastes of vegetable and melon-type crops have been studied and their monosaccharide compositions have been determined. High- and low-methoxyl pectins have been isolated, and the physicochemical characteristics are given. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 597–600, September–October, 1994.     

Cycloalkene budding: mass spectrometric studies of competitive and dual cycloalkene extrusion reactions from doubly unsaturated aldehyde N,N-dimethylhydrazones

Mass spectral fragmentation pathways of four doubly unsaturated aldehyde N,N-dimethylhydrazones were investigated using EI-MS and tandem mass spectrometry (MS/MS) under electron ionization and collisionally activated decomposition (CAD) conditions. Cyclopentene extrusion was found to be slightly favored over cyclohexene loss in a hydrazone capable of losing either cycloalkene. Evidence for the regeneration of a chain-shortened iminium radical cation as a result of cycloalkene extrusion was provided by studying substrates capable of undergoing successive cycloalkene budding sequences. EI-MS of these compounds shows sequential loss of both cyclopentene and cyclohexene, in accord with expectations for a cascade mechanism. Although these MS/MS experimental results are also compatible with alternative mechanisms which would entail the simultaneous loss of both neutral cycloalkenes or of a macrocyclic diene, a rapid cascade of cycloalkene budding accounts best for the experimental observations.