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171.
Babankova D Civis S Juha L Bittner M Cihelka J Pfeifer M Skala J Bartnik A Fiedorowicz H Mikolajczyk J Ryć L Sedivcova T 《The journal of physical chemistry. A》2006,110(44):12113-12120
Large-scale plasma was created in molecular gases (CO, CO2, N2, H2O) and their mixtures by high-power laser-induced dielectric breakdown (LIDB). Compositions of the mixtures used are those suggested for the early earth's atmosphere of neutral and/or mildly reducing character. Time-integrated optical spectra emitted from the laser spark have been measured and analyzed. The spectra of the plasma generated in the CO-containing mixtures are dominated by emission of both C2 and CN radicals. A vibrational temperature of approximately 10(4) K was determined according to an intensity distribution in a vibronic structure of the CN (B2Sigma(+)u-X2Sigma(+)g) violet band. For comparison, the NH3-CH4-H2-H2O mixture has been irradiated as a model of the strongly reducing version of the early earth's atmosphere. In this mixture, excited CN seems to be significantly less abundant than C2. The LIDB experiments were in the molecular gases carried out not only in the static cell but also using a large, double stream pulse jet (gas puff target) placed in the vacuum interaction chamber. The obtained soft X-ray emission spectra indicate the presence of highly charged atomic ions in the hot core of high-power laser sparks. 相似文献
172.
Nowicka Beata Burgess John Parsons Simon A. Samotus Alina Szklarzewicz Janusz 《Transition Metal Chemistry》1998,23(3):317-319
Solvatochromism of the [Mo(CN)3O(phen)]− ion has been studied. Solvent effects on pressure dependence (up to 1.25 kbar) of wavelengths of maximum absorption for charge-transfer
bands of several molybdenum(IV) and tungsten(IV) complexes, [M(CN)3O(diimine)]− (M = Mo or W), are described. The effects of applied pressure are larger for less polar unstructured solvents than for highly
polar hydrogen-bonded solvents.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
173.
Janusz Brzdȩk 《manuscripta mathematica》2006,121(2):265-276
It is well known that a microperiodic function that maps the set of reals into itself and is continuous at a point (Lebesgue measurable, respectively) must be constant (constant almost everywhere, resp.). We generalize those results in several directions. As a consequence we obtain conclusions concerning some systems of functional inequalities. 相似文献
174.
175.
Wojciech Kroszczyski Ewa Olszewska Piotr Saaski Janusz Jurczak 《Helvetica chimica acta》2004,87(6):1488-1492
A simple and effective method to deprotect of sterically hindered steroid esters is described. Deprotection was carried out in MeOH in the presence of a catalytic amount of Et3N under high‐pressure conditions. Enzymatic, anionite, and high‐pressure methods are compared. 相似文献
176.
Janusz Garecki 《International Journal of Theoretical Physics》1995,34(11):2307-2319
It is shown that in isotropic, homogeneous cosmological models in the framework of a gauge theory of gravity, the material and gravitational parts of the energy-momentum, orbital angular momentum, and spin cancel each other out locally, resulting in the global quantities being trivially zero. 相似文献
177.
Janusz Garecki 《General Relativity and Gravitation》1995,27(1):55-64
It is shown by using covariant expressions that in the framework of the isotropic and homogeneous cosmology the gravitational energy and matter energy, the gravitational and matter linear and angular momentum, cancel each other out locally, resulting in the corresponding global quantities being zero. 相似文献
178.
Janusz Walorski 《Integral Equations and Operator Theory》2008,60(4):597-600
The problem of the existence of continuous and smooth solutions of the Schr?der equation defined on normed spaces is examined.
This research was supported by the Silesian University Mathematics Department (Linear functional equations program). 相似文献
179.
Janusz Dabrowski Krystyna Kamieska-Trela Lech Kozerski 《Magnetic resonance in chemistry : MRC》1974,6(9):499-502
Carbon-13 magnetic resonance spectra of the s-cis and s-trans rotamers of enamino ketones and thiones of the general formula \documentclass{article}\pagestyle{empty}\begin{document}${\rm X =}\mathop {\rm C}\limits^{\rm 1} {\rm (}\mathop {\rm R}\limits^{\rm 1} {\rm)}\mathop {\rm C}\limits^{\rm 2} {\rm H =}\mathop {\rm C}\limits^{\rm 3} {\rm HN}\mathop {{\rm R}_{\rm 2}}\limits^{\rm 4}$\end{document} (where × = O or S and R-1, R-4 = alkyl) have been obtained. With dimethylaminoacrolein and its thione analogue, restricted rotation could only be observed in the latter. The chemical shift differences between rotamers and homologues are attributed to changes in conjugation and to induced bond polarisation, both these factors resulting from steric strain. In particular, nonplanar deformations of the s-trans rotamers are deduced from their C-2 chemical shift values. 相似文献
180.
Janusz Traple 《Rendiconti del Circolo Matematico di Palermo》1985,34(1):46-55
In this paper we state some theorems on homogeneization of the equationx′=f (t, x), wheref is a weak almost periodic function int and we give a definition ofG-equivalence for ordinary differential equations. 相似文献