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31.
D.S. Viktorov U.I. Safronova 《Journal of Quantitative Spectroscopy & Radiative Transfer》1985,33(1):39-49
Transition energies and probabilities are presented for ions of the Be(Z = 4?100) and O(Z = 8?100) isoelectronic sequences. Dipole transitions are considered between all low-lying states constructed from 2s2, 2s2p, and 2p2 configuration in the case of Be-like ions, and between all low lying states from 2s22p4, 2s2p5, and 2p6 configurations in the case of O-like ions. The calculations are based on the expansion technique and are carried out in the intermediate coupling scheme. Relativistic effects are incorporated using the Breit operator. For Z > 40, it is shown that jj-coupling is applicable. Results of the present calculations are compared with those of other authors over a broad range of nuclear charges. 相似文献
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Shellie RA Welthagen W Zrostliková J Spranger J Ristow M Fiehn O Zimmermann R 《Journal of chromatography. A》2005,1086(1-2):83-90
The potential for the utilization of GC x GC-time-of-flight (TOF) MS for high-resolution metabolomics studies is discussed, with the implementation of some statistical comparisons for biomarker detection. Metabolite profiles from NZO obese mice versus BL/6 control mice are compared and contrasted using a number of chromatogram comparison routines, including direct chromatogram comparisons, chromatogram subtraction and averaging routines, as well as a method for generating relative weighted peak surface difference chromatograms, and a more conventional Student's t-test statistical approach. 相似文献
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A method for the simultaneous determination of 4(5)-methylimidazole (4MeI) and 2-acetyl-4(5)-(1,2,3,4-tetrahydroxybutyl)-imidazole (THI) was developed using SPE and HPLC/MS. Solid-phase extraction using SCX Disc cartridges was used for isolation of the analytes from liquid samples. The lower LOQwas 0.1 ng/mL for 4MeI and 0.2 ng/ mL for THI. The linearity of the calibration curves was satisfactory as indicated by correlation coefficients >0.999. The CV for the intra- and inter-day precision was <5% (n = 6); the accuracy was in the range 98-103%. The recovery was > or = 97 and > or = 98% for THI and 4MeI, respectively. The method was used to determine THI and 4MeI in beverages, coffee, caramel colours and other samples. 相似文献
38.
Jitka Kuldov Peter Koovan Zuzana Limpouchov Karel Prochzka 《Macromolecular theory and simulations》2013,22(1):61-70
We present a computer study of the association behavior of copolymer chains with a gradient part and soluble tail of variable length. As a simulation method we use dynamic Monte Carlo simulation on a simple cubic lattice with pair interaction parameters. The solvent quality and selectivity is modeled by the variation of pair interaction parameters between nearest neighbors on the lattice. The role of the length of soluble part in the self‐assembly and its effect on the structure of aggregates was the main goal of this work. The size and structure of aggregates were analyzed using an improved topological classification method which has been developed and tested in the present study. The structure and association numbers of aggregates were compared with those of linear diblock copolymers.
39.
S. D. Viktorov A. N. Kochanov 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(3):298-300
A procedure for and the results from experimental studies of the microstuctural changes in rock samples under the action of high pulse pressure during the passage of shock waves are presented. Images of fragments of the sample surfaces at different scales before and after the action are obtained by electron microscopy. The distribution of microparticles in the size range of 0.3?10 μm, formed as a result of explosive disintegration, is established. 相似文献
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Viktorov E. A. Pastor A. A. Serdobintsev P. Yu. Bezuglov N. N. 《Optics and Spectroscopy》2021,129(12):1311-1313
Optics and Spectroscopy - Ionization of coherently two-photon-excited superposition of 4f states of Xe in a supersonic atomic beam is studied by means of femtosecond pump–probe spectroscopy.... 相似文献