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121.
Enthalpies of crystallization of NH4Al(SO4)2·12H2O from aqueous solutions at 25°C, measured using a calorimetric method and determined from previously published data on the concentration dependence of the enthalpy of solution, are reported. The results are compared with the values obtained from the temperature dependence of solubility and from vapor pressure data by using the Williamson equation. The integral and partial molar enthalpies of solution in concentrated and diluted solutions are given. 相似文献
122.
Our aim is to extend existing results about differentiable rigidity of higher rank abelian actions by automorphisms of a torus.
Previous proofs have required an assumption of semisimplicity, that is, that the action is by commuting diagonalizable matrices. Here we introduce a technique that utilizes the unipotent
part of a non-semisimple action, which allows us to discard the semisimplicity assumption. In its place we will make a technical
assumption that the spectrum of the action restricted to leaves of the coarse Lyapunov decomposition is sufficiently narrow. 相似文献
123.
124.
In this paper we prove some new fixed point theorems for multivalued mappings on orbitally complete uniform spaces. 相似文献
125.
S. E. Savel’ev L. M. Fisher V. A. Yampol’skii 《Journal of Experimental and Theoretical Physics》1998,87(5):978-984
Penetration by Abrikosov flux lines of an isotropic hard superconductor in the critical state induced by changes in the orientation
of external magnetic field has been theoretically investigated. The analysis has been based on the microscopic nonlocal model
taking into account forces of bulk and surface pinning, alongside magnetic forces of interaction of the row of penetrating
vortices with existing flux lines, Meissner currents, and vortex images. New vortices penetrate a superconductor only when
the angle through which the field is rotated is larger than a certain critical value. It has been determined that the alignment
of entering vortices is essentially different from that of the applied magnetic field. The feasibility of detecting noncollinearity
effects is discussed.
Zh. éksp. Teor. Fiz. 114, 1804–1816 (November 1998) 相似文献
126.
D. S. Ruzanov A. I. Fisher A. V. Eremin V. G. Antonov O. S. Fedorova M. A. Stepanova A. N. Belyaev S. A. Simanova 《Russian Journal of Applied Chemistry》2008,81(5):904-905
Catalytic activity of oligonuclear cobalt(III) and cobalt(II, III) oxoacetate complexes in homogeneous oxidation of glutathione with hydrogen peroxide was studied. 相似文献
127.
Abstract— Evidence is presented for the formation of a thymine hydrate upon ultraviolet (UV) or gamma irradiation of aqueous solutions. The UV quantum efficiency exhibits a dependence on pH similar to that shown for uracil hydration, but the yield is three orders of magnitude smaller than for uracil. Hydration is not affected by wavelength, oxygen, or concentration of thymine. The reversal rate of the photohydrate to thymine is similar to the reversal rates of both isomers of the thymine hydrate formed by γ radiolysis, and depends on pH in the same way as the rate for the uracil photohydrate. The photohydrate of thymine is chromatographically identical to the cis isomer of 6-hydroxy-5, 6-dihydrothymine. 相似文献
128.
129.
130.
By heating a sample of neodymium-doped ED-2 glass, we have achieved a thermal population of the level sufficient to observe the excited-state absorption spectrum. Features were seen at 1.06 μm and at 6000 Å. 相似文献