A Study of Drop Size Distribution in Multistage Bubble Extractor

Results obtained in determining experimentally the mean volume-surface drop diameter of the dispersed phase in a multistage bubble extractor are presented.     

Structures of decorine and delcoridine

In order to confirm the structures of the alkaloids delcorine and delcoridine (O-demethyldelcorine) suggested previously, a direct passage has been performed from delcoridine to delcorine and from delcorine to delphatine. It has been shown that the configuration of C₁ - OCH₃ previously suggested for delcorine and delcoridine is incorrect — it should be .Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 621–623, September–October, 1981.     

Structure of dictysine

The results are given of an investigation of the structure of the new diterpene alkaloid dictysine C₂₁H₃₃NO₃ isolated from the epigeal part ofDelphinium dictyocarpum DC. On the basis of the results of a study of chemical and spectral characteristics, dictysine has been shown to have the sengorine skeleton, with hydroxy groups at C₁₅, C₁₆, and C₂₀.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 812–817, November–December, 1979.     

New asymptotic representation for singular integral with Hilbert kernel near a point of weak continuity of density

We obtain an asymptotic representation of singular integral with the Hilbert kernel near a point, where modulus of continuity of its density behaves itself as inverse value of double logarithm of distance from this point.     

On the Equicontinuity of One Family of Inverse Mappings in Terms of Prime Ends

Ukrainian Mathematical Journal - For a class of mappings satisfying upper modular estimates with respect to the families of curves, we study the local behavior of the corresponding inverse...     

On local properties of spatial generalized quasi-isometries

Mathematical Notes - An upper bound for the measure of the image of a ball under mappings of a certain class generalizing the class of branched spatial quasi-isometries is determined. As a...     

Extraction of a powerful electron beam into the atmosphere through two parallel titanium foils

This paper described the system used in ELV-6 and ELV-12 industrial accelerators for electron beam extraction into the atmosphere through two parallel titanium foils.     

Spectrophotometric determination of association equilibrium constants of certain phenol substitution derivatives with triethylamine

A spectrophotometric technique was used to determine the association equilibrium constants of phenol, o-isopropylphenol, p-tert-butylphenol, 3,4-, 2,5-, 2, 6-dimethylphenols, and thymol with triethylamine (in an n-heptane medium). The ultraviolet spectra recorded serve as proof of the formation of a hydrogen bond between the hydrogen atoms of the hydroxyl group and the nitrogen atom of triethylamine in these systems (phenol-triethylamine-n-heptane).In conclusion we express out sincere thanks to Prof. V. M. Tatevskii for his interest and valuable advice.