Oxidation of hexadec-11Z-en-1-ol by Cr(VI) reagents on polymeric supports

A method is proposed for the oxidation of hexadec-11Z-en-1-ol to hexadec-11Z-enal by Cr(VI) reagents on polymeric supports.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek Academy of Sciences, Tashkent. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 252–255, March–April, 1990.     

Effect of solvent on the adsorption of benzene vapors by dicyclohexane-18-crown-6 thin films

The solvent effect on the stability of the zero signal of resonators with a dicyclohexane-18-crown-6 film was studied. The adsorption capacity and sensitivity of the film coatings to benzene vapors was estimated. The performance characteristics of the microweighing of benzene vapors were calculated. A model was proposed for benzene adsorption from the gas phase on thin films of crown ether.     

Atomic and electronic structures of lutetium oxide Lu2O3

The chemical composition, electronic structure, structure, and physical properties a lutetium oxide Lu₂O₃ film are studied by X-ray photoelectron spectroscopy, ellipsometry, and X-ray absorption spectroscopy. The short-range order in Lu₂O₃ is found to correspond to its cubic modification. The binding energies of the 1s and 2p levels of oxygen and the 4d _5/2 and 4f _7/2 levels of lutetium are 529.2, 5.0 and 7.4, 195.9 eV, respectively. The energy gap determined from the electron energy loss spectrum of the film is 5.9 eV. The electron energy loss spectra have two peaks at 17.4 and 22.0 eV, which can be attributed to the excitation of bulk plasma oscillations. The dispersion of the refractive index is measured by spectral ellipsometry. The refractive index is shown to increase from 1.82 at 1.5 eV to 2.18 at 5.0 eV, and the high-frequency permittivity of Lu₂O₃ is 3.31.     

On a bounded almost periodic solution of a semilinear parabolic equation

We obtain sufficient conditions for the existence and uniqueness of a bounded almost periodic solution of a semilinear parabolic equation. Institute of Theoretical and Applied Mathematics, Ministry of Science and Academy of Sciences of Kazakhstan, Alma-Ata, Kazakhstan. Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 52, No. 6, pp. 828–830, June, 2000.     

Mechanical Properties of Polymeric Emboli for Occlusion of Blood Vessels

Investigations of the formation of solid emboli in an aqueous medium of biocompatible solutions of polymers were carried out. Approaches to the production of solid samples for tensile and compression tests were developed and their mechanical properties were studied. It is shown that the ultimate compressive and tensile strength of emboli formed in an aqueous medium slightly decreases with increasing time of aging in water and increases markedly with increasing polymer concentration in the embolizing solution. All the tested compounds exhibit strength sufficient to not be destroyed by the action of blood flow.     

Analysis of the products of synthesis of the pheromone of the bollworm by gas-liquid chromatography

The possibility has been shown of the effective separation and identification of the main component of the pheromone of the bollworm, hexadec-cis-ll-enal, and accompanying impurities by gas-liquid chromatography on the nonpolar stationary liquid phase E-301 deposited on Chromaton N-AW-HMDS.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 576–579, July–August, 1989.