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Elektronová struktura slitin india a cínu
Všianská, Monika ; Legut, Dominik ; Šob, Mojmír
The In-Sn system is interesting due to the existence of the simple hexagonal (sh) structure for compositions from 75 to 87 at% Sn at 25 ºC and from 73 to 85 at% Sn at -150 ºC. These alloys are usually referred to as gamma-Sn. Here we study the electronic structure and total energy of gamma-Sn with the help of virtual crystal approximation and demonstrate that sh structure has the lowest energy in the interval of existence of gamma-tin.
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Studium magnetismu hranic zrn z prvních principů
Čák, Miroslav ; Šob, Mojmír ; Hafner, J.
Grain boundaries (GBs) represent an important class of two-dimensional extended defects in materials. Segregation of impurity atoms is responsible for a degradation of mechanical properties. Recently, it was found that application of magnetic annealing leads to decreasing concentration of impurities at GBs in Fe-0.8%Sn alloy and improves its ductility To understand the mechanism of this process it is necessary to study magnetism of clean GBs as well as of GBs with segregants at the microscopic (ab initio) level. In the present work, we investigate the Sigma5(310) GB in iron.
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Si-obsahující Lavesovy fáze
Houserová, Jana
We performed electronic structure calculations to study the thermodynamic and structural properties of the C14 Laves phases in several systems with various compositions. In the frame of a thermodynamic study, we have evaluated the total energies of formation of Laves phase structure with different occupations of sublattices (Si2Si, Si2X, X2Si, X2X, where X stands for Cr, Fe, Mo and W) with respect to the Standard Element Reference (SER) states.
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Phase Equilibria in Systems for Lead-Free Solders
Vřešťál, J. ; Kroupa, Aleš ; Zemanová, Adéla ; Houserová, J. ; Pinkas, J.
In the year 2006,the optimization of parameters of systems Bi-Pd and Ag-In-Pd were completed by publications in articles and by addud of parameters to database COST 531. The optimisation of parameters for calculation of phase diagram of system Bi-Sb-Sn and In-Sb-Sn was performed and the results were publiced in Journal of Alloys and Compounds and parameters were added to database COST 531 and the optimisation of parameters in the system Cu-In-Sn was developing.
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Electrochemical study of the effect of long-term creatine supplementation creatine on human metabolism
Šenholdová, Z. ; Navrátil, Tomáš ; Heyrovský, Michael ; Pelclová, D.
The volunteers were supplemented in time interval of one month by creatine. Body parameters (mass, height, intra- and extracellular water content etc.), levels of vitamins and a few other compounds in urine and in blood (vitamine B12, homocysteine, thiodiglycolic acid, creatine, creatinine etc.) were followed. The corresponding metabolic processes are studied.
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The voltammetric analysis based on electrolyte signal
Holík, M. ; Halámek, Josef ; Mikelová, R. ; Trnková, L.
The voltammetric measurements of Hetero-oligodeoxynucleotides ODNs: 5´-CCC AAA CCC- 3´, 5´-CAC CACCAC- 3´, and 5´-ACC CAC CCA- 3´ on AUTOLAB 20 (EcoChemie, The Netherlands) were analyzed with different baseline correction - linear, exponential, polynomial and with shape defined by signal of electrolyte. The best results were achieved with correction based on electrolyte and exponential shape.
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