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  • 1
    Electronic Resource
    Electronic Resource
    Study of the catalytic and adsorption properties of ruthenium catalysts in the hydrogenation of cyclohexene (1966)
    Springer
    Russian chemical bulletin 15 (1966), S. 1459-1464 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Ruthenium blacks are comparatively active catalysts of the liquid-phase hydrogenation of cyclohexene. 2. In the presence of catalysts containing ruthenium oxide, the hydrogenation of cyclohexene proceeds with an induction period, which is accompanied by a sharp shift of the potential in the anodic direction, to 400 mV. 3. Charging curves of ruthenium black were obtained. A measurement of the surface according to the double-layer capacitance of ruthenium black is impossible, since together with charging of the surface there is an adsorption of oxygen. More reliable values are obtained when the surface is determined according to the hydrogen region. 4. The bond energies of the surface ruthenium atoms to hydrogen and to carbon at the double bond in the cyclohexene molecule were calculated, and it was demonstrated that the presence of oxides in the catalyst decreases the bond energy of the catalyst to hydrogen and increase the bond energy to carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00848896
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  • 2
    Electronic Resource
    Electronic Resource
    Possible hole center structures in irradiated magnesium oxide (1976)
    Springer
    Russian chemical bulletin 25 (1976), S. 1175-1179 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The authors suggest a model to explain the axial symmetry of the hole center V− in magnesium oxide. 2. Using the model they consider the possible alternatives for localization of the hydroxyl groups of the hole center. 3. In analytic form, they express the values of the g factors for the V− center in terms of the parameters of the method of molecular orbits. The experimental values of the g factors can be explained if we assume localization of one or two hydroxyl groups in the first or second layer from the O− radical ion in the MgO lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00928045
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  • 3
    Electronic Resource
    Electronic Resource
    Atomic hydrogen in γ-irradiated hydroxides of alkaline-earth elements (1982)
    Springer
    Russian chemical bulletin 31 (1982), S. 672-677 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. We have detected for the first time stabilization of atomic hydrogen inγ-irradiated polycrystalline alkaline-earth element hydroxides. 2. Depending on the degree of dehydroxylation, several types of hydrogen atoms may be stabilized in the hydroxides, these hydrogen atoms having different radiospectroscopic parameters. 3. In the magnesium-calcium-strontium-barium hydroxide series, a regular decrease has been found in the hfi constants for H atoms with the cations in the immediate surroundings. A direct proportionality has been found between the parameters ΔA/A0 and the polarizability of the cation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00949995
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  • 4
    Electronic Resource
    Electronic Resource
    Calculation of frequencies of O-H vibrations of hydroxyl-containing radiation centers in single crystals of some oxides (1983)
    Springer
    Russian chemical bulletin 32 (1983), S. 1924-1926 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions A method was proposed for calculating the vibration frequencies of the OH group in hydroxyl-containing centers with a cationic vacancy in the immediate vicinity. The calculated vibration frequencies were compared with the experimental values of the absorption bands of the OH groups in the single crystals of MgO, CaO,α-Al2O3, and TiO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00954674
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  • 5
    Electronic Resource
    Electronic Resource
    Radiation processes in hydroxyl-containing single crystals of magnesium oxide (1983)
    Springer
    Russian chemical bulletin 32 (1983), S. 1768-1774 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Thermal and radiational processes in single crystals of magnesium oxide with varying concentrations of OH− ion impurities and cationic impurities were studied by IR and EPR spectroscopy. 2. The protons of the Mg(OH)2 microphase were thermally the most mobile in hydroxyl-containing single crystals of MgO. The reciprocal redistribution of protons between the microphase and interstices began at 400°K. The region of migration of cationic vacancies (700–900°K) was another region of proton mobility. 3. Radiational processes in hydroxyl-containing single crystals of MgO can be divided into three successive stages: A VOH center is formed with small absorbed doses, and diffusion of a proton from the VOH center with formation of a V(OH)2 center and interstitial protons is observed on further irradiation. With doses above 100 Mrad, the Mg(OH)2 microphase is formed due to the V(OH)2 center and Hi +. The direction and rate of the processes of hydrogen redistribution are a function of the concentration of cationic impurities, the concentration of OH− ions, the dose absorbed, and the irradiation temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00954642
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  • 6
    Electronic Resource
    Electronic Resource
    Radiational centers in barium hydroxide and its crystal hydrates (1989)
    Springer
    Russian chemical bulletin 38 (1989), S. 1996-2001 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The formation and stabilization of hole and electron centers at 77 K in γ-irradiated polycrystalline samples of Ba(OH)2·H2O, where x=7.4, 1, and O are studied. Several types of O− radical ions with different short-range order, electronic centers of the FA-center type, and hydrogen atoms are shown to be stabilized upon radiolysis of barium hydroxide crystal hydrates. The radiation-chemical yields of 0” radical ions increase and the yields of FA-centers decrease with increasing content of water of crystallization. Narrow singlets with g=2.019 and ΔH1/2=0.45 mT in the EPR spectrum of all samples appear with small radiation doses. These are thermally unstable (τ1/2=60 sec at 77 K). The annealing curves are linear in semilogarithmic coordinates. They are suggested to belong to clusters of the type Ba n 2n-x . A possible mechanism of radiolysis of barium hydroxide crystal hydrates is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00962093
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  • 7
    Electronic Resource
    Electronic Resource
    Formation of foreign paramagnetic centers in radioactive specimens of barium sulfate (1970)
    Springer
    Russian chemical bulletin 19 (1970), S. 1359-1361 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions In radioactive specimens of barium sulfate containing nitrate or formate ions, foreign paramagnetic centers (NO 2 . and CO 2 − ) accumulate at room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00852701
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  • 8
    Electronic Resource
    Electronic Resource
    Paramagnetic centers in gamma-irradiated magnesium oxide (1976)
    Springer
    Russian chemical bulletin 25 (1976), S. 940-947 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The authors have studied the formation of electron and hole paramagnetic centers in gamma-irradiated magnesium hydroxide and oxide with various degrees of dehydration. 2. Rise in the temperature of preliminary heat treatment of the magnesium oxide causes an increase in the radiation-chemical yield of FS + centers and a decrease in that of V su − centers. 3. The thermal stability of paramagnetic centers in magnesium oxide increases as the hydroxyl group content decreases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00921969
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  • 9
    Electronic Resource
    Electronic Resource
    Formation and kinetics of the accumulation of No 2 . radicals in γ-irradiated barium sulfate, containing an admixture of the nitriteion (1970)
    Springer
    Russian chemical bulletin 19 (1970), S. 1597-1602 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. In the case of irradiation of polycrystalline samples of BaSO4 with occluded nitrite ions, NO 2 . radicals are formed together with SO 4 − and SO 4 − . 2. The kinetics of the accumulation of NO 2 . radicals as a function of the nitrite ion concentration was discussed. 3. A mechanism was proposed for the formation of paramagnetic centers, taking into consideration the transfer of energy of radiation in the barium sulfate crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00996488
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  • 10
    Electronic Resource
    Electronic Resource
    Study of the redistribution of absorbed energy in γ-irradiated salts with the formation of impurity paramagnetic centers as an example (1974)
    Springer
    Russian chemical bulletin 23 (1974), S. 510-514 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The principles of formation of impurity paramagnetic centers (PC) inγ-irradiated salts with oxygen-containing anions were established. The probability of formation of hole PC inγ-irradiated salts is determined by the ratio of the ionization potentials of the anions of the matrix and impurity: PC arise only in the case when the ionization potential of the impurity anion is lower than the corresponding value for the anion of the matrix. The probability of formation of electronic PC is related to the electron affinity of the corresponding oxyanions. 2. The appearance of impurity PC inγ-irradiated salts containing impurity anions is associated with the transfer of free electrons and holes from the matrix to the impurity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00921134
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