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[en] The reaction of dicyclohexyl-18-crown-6 and 18-crown-6 with primary radiolysis products of water was studied by the pulsed radiolysis and EPR spectroscopy methods. Crown ethers are highly reactive with respect to H atoms and OH and O- radicals and slightly reactive with respect to hydrated electrons. The H atoms and OH and O- radicals dehydrogenate crown ethers without rupturing the cyclic structure to form a short-lived radical (λ/sub max/ = 260 nm). The secondary reactions of radicals are accompanied by the decomposition of the cyclic structure. The radiation-chemical yield of the decomposition of the crown ether molecules in aqueous solutions is 0.6 for 18-crown-6 and 0.9 for dicyclohexyl-18-crown per 100 eV
Journal
[en] The formation of the disperse phase of AgCl in aqueous solutions containing organochlorine compounds as additives was studied by pulsed radiolysis. It was shown that attenuation of light is only due to scattering on colloidal particles of (AgCl)m. The Rayleigh law (D ∼ λ-n) is satisfied for the optical spectra. The values of n decrease from 4 to 3 with an increase in D, which indicates an increase in the average particle size from ≤50 to ∼140 nm. The composition of the solution (its ionic strength in particular) significantly affects the formation and stability of the disperse phase. 11 refs., 3 figs., 3 tabs
Journal
[en] The work is aimed at more detailed theoretical analysis of the structure of radicals in cellulose gamma-irradiated at 77 K, specification of the mechanism of their formation, as well as studying reactions of transformation of radicals in the case of temperature increase. It is established that in the case of cellulose gamma-irradiation radicals appear with the localization of an unpaired electron in 1 and 4 positions of the pyranose cycle the formation of which is accompanied by the disruption of the glycoside bound. Thermal transformations of these radicals are conditioned by their dehydration and occur with the formation of radicals of the allelow type
Journal
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya; ISSN 0002-3353; 
; (no.6); p. 1276-1280
; (no.6); p. 1276-1280
No abstract available
Source
Rossijskaya Akademiya Nauk, Moscow (Russian Federation); RAN, Institut Fizicheskoj Khimii i Ehlektrokhimii im. A.N. Frumkina, Moscow (Russian Federation); 272 p; ISBN 5-94691-148-1; ; 2005; p. 41; Physical-chemical foundations of new technologies of XXI century. International conference dedicated to 60th anniversary of the Institute of Physical Chemistry, Russian Academy of Sciences; Fiziko-khimicheskie osnovy novejshikh tekhnologij XXI veka. Mezhdunarodnaya konferentsiya, posvyashchennaya 60-letiyu sozdaniya Instituta Fizicheskoj Khimii Rossijskoj Akademii Nauk; Moscow (Russian Federation); 30 May - 4 Jun 2005
; 2005; p. 41; Physical-chemical foundations of new technologies of XXI century. International conference dedicated to 60th anniversary of the Institute of Physical Chemistry, Russian Academy of Sciences; Fiziko-khimicheskie osnovy novejshikh tekhnologij XXI veka. Mezhdunarodnaya konferentsiya, posvyashchennaya 60-letiyu sozdaniya Instituta Fizicheskoj Khimii Rossijskoj Akademii Nauk; Moscow (Russian Federation); 30 May - 4 Jun 2005
[en] The change of reducing substances content in recalculation for glucose and content of compounds with multiple bonds in recalculation for furfurol under various condition of γ-radiolysis of hydrolysis substrates is studied. Irradiation has been carried out at 300 K, dose rate has constituted 220 rad/c. It is established that during irradiation the concentration of unsaturated compounds decreases and the concentration of reducing substances increases. Shown is the improving effect of radiation treatment on nutrient media, which manifests itself in the considerable increase of the output of total protein
Journal
Zhurnal Prikladnoj Khimii; ISSN 0044-4618; ; v. 53(7); p. 1608-1611
; v. 53(7); p. 1608-1611
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