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Now showing items 1181-1190 of 1441
The effect of an intense laser field on magneto donors in semiconductors
(ELSEVIER SCIENCE BV, 2003)
The laser-field dependence of the binding energy of shallow-donor impurities in graded, and square quantum wells under the external magnetic field is calculated by a variational method and in the effective mass approximation. ...
On Strongly Precontinuous Functions
(SPRINGER, 2008)
In this paper, we give some characterizations of strongly precontinuous functions. Also we investigate some special properties of these function.
Shallow impurity binding energy in lateral parabolic confinement under an external magnetic field
(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2008)
We have described the calculation of hydrogenic impurity binding energies in cylindrical GaAs-Ga(1-x)Al(x)As quantum well wires (QWWs) with lateral parabolic confinement in the presence of an axial magnetic field. The ...
Comparative effects of levosimendan and dobutamine on right ventricular function in patients with biventricular heart failure
(SPRINGER, 2009)
Severe heart failure represents a major source of morbidity and mortality. Poor right ventricular function is an independent prognostic marker for mortality in patients with chronic heart failure. In this study, levosimendan ...
Characteristics of Fe-exchanged natural zeolites for the decomposition of N2O and its selective. catalytic reduction with NH3
(ELSEVIER SCIENCE BV, 2007)
Natural zeolites obtained from various regions of Turkey and their iron-exchanged forms were characterised by XRD, BET, H-2-TPR and NH3-TPD methods. Transient experiments with N2O showed that the iron introduced into natural ...
Mineralogical and geochemical characteristics of late Cretaceous bentonite deposits of the Kelkit Valley Region, northern Turkey
(MINERALOGICAL SOC, 2000)
Late Cretaceous bentonitic clays in the Kelkit Valley region of Turkey are composed of an alternation of limestone lenses and silicified tuff nodule-bearing pyroclastic rocks and their alteration products. Quartz, feldspar, ...
Fourier transform technique in variational treatment of two-electron parabolic quantum dot
(IOP PUBLISHING LTD, 2009)
In this work, we propose an efficient method of reducing the computational effort of variational calculation with a Hylleraas-like trial wavefunction. The method consists of introducing integra transforms for the terms as ...
Transfer hydrogenation of ketones catalyzed by 1-alkylbenzimidazole ruthenium(II) complexes
(SPRINGER WIEN, 2007)
Six [RuCl2(1-alkylbenzimidazole)(p-cymene)] complexes have been prepared and the new compounds characterized by C, H, N analyses, H-1 NMR, and C-13 NMR. The reduction of ketones to alcohols via transfer hydrogenation was ...
Investigation of the effect of agglomeration time, pH and various salts on the cleaning of Zonguldak bituminous coal by oil agglomeration
(ELSEVIER SCI LTD, 2002)
In this study, the effects of bridging liquid concentration, agglomeration time, pH and various salts on the combustible recovery and ash contents of the agglomerated products have been investigated. Kerosene was used as ...
Sternum Fractures and Effects of Associated Injuries
(GEORG THIEME VERLAG KG, 2009)
Background: Aim of this study was to determine the clinical characteristics, morbidity and mortality in patients with a sternum fracture (SF). Methods: From October 1998 to December 2008, 80 patients with sternal fractures ...