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911.
Quantitative data for some of the radionuclides, most important because of their intensity and radiotoxicity, present in the biosphere after the Chernobyl accident are given for a selected number among numerous plant and food samples analyzed before and after the accident. 相似文献
912.
Dragomir Ž. Ðoković 《Geometriae Dedicata》1988,27(1):101-111
Let G be a connected reductive complex Lie group. Let E
G
be the image of the exponential map of G and E'
G
its complement in G. We give a purely algebraic characterization of the set E
G
and also describe an algorithm for finding all conjugacy classes of G in E'
G
. We are mainly interested in the case when the Lie algebra of G is simple and exceptional. Full details are provided for groups G of type G
2, F
4, and E
6. If G is of type G
2 then there are only two such conjugacy classes.This work was supported by NSERC Grant A-5285. 相似文献
913.
The thermochemical behaviour of nitrate inclusion complexes of zeolites of type A was investigated and DTA curves recorded. An attempt was made to identify thermal effects. Supplementary information was obtained from the IR spectra of the solid phase before and after heating as well as from the process of denitration of inclusion complexes. 相似文献
914.
A set of accurate measurements of the low temperature magnetoresistivity of dilute AlMn alloys is presented. By using an AlV alloys as a baseline, the resulting negative magnetoresistivity is obtained and compared with theoretical calculations. 相似文献
915.
916.
917.
Several bis(ligand) octahedral complexes of iron(III) with salicylaldehyde semi-, thiosemi-, and S-methylthiosemi- carbazones have been synthesized and characterized by elemental analysis, conductivity and magnetic measurements, electronic and IR spectra, as well as by linear sweep and cyclic voltammetry. General procedures for the syntheses of all types of complexes have been established, giving better defined reaction conditions. Physicochemical properties of the novel complexes have been related to those of the already known compounds of the same type. 相似文献
918.
We show that in large period modulated alloys the tricritical points curve begins at αc = 1/(1 + δ, where δ is the modulation amplitude. In the domain of the 2nd order transition, which appears smaller than in the homogeneous case, Hc21(T) and Hc31(T) are calculated. 相似文献
919.
V. Vukanović D. Vukanović M. Simić 《Spectrochimica Acta Part B: Atomic Spectroscopy》1978,33(8):481-487
The process of plasma formation and rotation in a graphite tube in a magnetic field was observed by means of a high speed camera. Phenomena occurring in a transient period, before a state of steady rotation is reached, were recorded. Further, the mutual influence of two plasmas burning in the graphite tube under various conditions was studied. 相似文献
920.