Standard enthalpies of formation of some N-spiranes

The heats of combustion of three compounds, members of a new series of N-spiranes were measured by combustion calorimetry. The molecules of the title compounds comprise condensed and N-spirofused heterocycles as well as nitroxy groups that are both NO-donors and explosophores. The enthalpies of formation and the heats of explosive transformation of these compounds are calculated. Two compounds belong to explosives with low heat of explosive transformation, whereas the third compound is inert.     

Energetic properties and impact sensitivity of crystalline explosives

The impact sensitivity of some groups of nitrates and cubane derivatives has been correlated with their heat of explosion and chemical structure. These correlations show the ways of reducing explosion hazard in handling these compounds. It is currently impossible to construct a reference series of compounds that would allow explosives with preset sensitivity to be synthesized on the basis of a preliminary energetic prediction. New opportunities to enhance safety in handling explosives can be provided by investigating their detonation ability.     

Problem of describing all L-operators for the R-matrices of the XXX and XXZ models

An analogy between the theory of group representations and the quantum inverse scattering method is discussed. The problem of describing all L-operators generating an arbitrary monodromy matrix is formulated. This problem is solved for the R-matrix of the XXX model.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 131, pp. 80–87, 1983.In conclusion we express out gratitude to E. K. Sklyanin for our discussions.     

Completely Integrable Equation for the Quantum Correlation Function of Nonlinear Schrödinger Equation

Correlation functions of exactly solvable models can be described by differential equations [1]. In this paper we show that for the non-free fermionic case, differential equations should be replaced by integro-differential equations. We derive an integro-differential equation, which describes a time and temperature dependent correlation function of the penetrable Bose gas. The integro-differential equation turns out to be the continuum generalization of the classical nonlinear Schr?dinger equation. Received: 15 January 1997 / Accepted: 21 March 1997     

Correlation function of fields in one-dimensional Bose-gas

Correlation function of fields is presented as a Fredholm minor, at finite coupling constant in one-dimensional Bose gas.     

Lattice versions of quantum field theory models in two dimensions

The quantum inverse scattering method allows one to put quantum field theory models on a lattice in a way which preserves the dynamical structure. The trace identifies are discussed for these models.     

Synthesis and structural study of 4,6-diazido-2-(2,2,2-trinitroethylamino)-1,3,5-triazine

Russian Chemical Bulletin - A method for synthesis of 2-(2,2,2-trinitroethylamino)-4,6-diazido-1,3,5-triazine from 2-amino-4,6-diazido-1,3,5-triazine was elaborated. The molecular and crystal...     

Cytostatic action of triazole and oxazolidinone derivatives

We synthesized a number of derivatives of 1,2,3-benzotriazole, 1,2,4-triazole, and oxazolidine-2-one derivatives, among which compounds suppressing the growth of the tumor cells HeLa and H1299 were revealed. The studies of the effect of these compounds on the cell cycle and activity of caspase dependent degradation of poly(ADP-ribose) polymerase showed that these compounds at the IC₅₀ doses exhibit cytostatic effect on tumor cells. In the MCF7 cells, these compounds induce an increase in expression of the tumor suppressor p53.