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The stress dependence of the electrical permittivity offers a convenient way of measuring pressure. This effect is suitable for static and quasi-static stress applications, where the conventional method based on the piezoelectric effect becomes inadequate. Although the principle of applying this effect for pressure sensing has been known for almost …

Thin film nanocomposites consisting of inorganic matter embedded within a soft polymeric matrix on the nanometer scale have attracted much interest lately due to their unique properties with potential application in optoelectronics and photonics. Polyelectrolyte multilayers formed by the layer-by-layer electrostatic assembly of oppositively charged polyions can be utilized as …

This PhD thesis presents experimental results from the synthesis, crystal structure and microwave dielectric characterization of BaO-rich phases within the BaO-Nb2O5 and BaONb2O5- WO3 system. I was primarily interested in two compounds with unknown crystal structure, i.e., the binary Ba4Nb2O9 and the ternary Ba6Nb2WO14, which lie on a common virtual …

The sterilization efficiency of oxygen plasma was studied. Plasma was created in pure oxygen with an inductively coupled radiofrequency discharge. The discharge power was estimated to about 180 W. Plasma parameters were measured with a double Langmuir probe and a catalytic probe. Plasma parameters depended on pressure in the discharge …

The possible mechanisms for destruction of two types of bacteria with oxygen radicals were studied. Samples consisting of standard ATCC strains of Gram – positive bacteria Staphylococcus aureus and Gram – negative bacteria Escherichia coli were obtained. Bacteria were cultivated according to the standard procedures and fixed on substrates of …

X-rays are diffracted on electron clouds and thereby provide a mean to observe 3-dimensional structure of molecules at atomic level. Using medium resolution diffraction data (2Å and lower) we have shown that averaging of electron density maps generated from sets of randomly distributed atoms and can reduce noise and model …

The study presents the influence of increasing the amount of β-spodumene (LiAlSi2O6) as Li2O-content flux on phase composition, microstructural evolution and physical properties of high alumina porcelain material containing ~61% of Al2O3. New porcelain compositions based on clays and high amount of calcined alumina were developed with the introduction of …

Unexpected production breakdowns and unpredictable defects in product quality remain critical problems in modern manufacturing systems. Usually occuring by no obvious exterior cause and often during periods of smooth production, they lead to production losses and reduced process availability, which results in lower profit rates. Conventional statistical methods of process …

Programmed cell death is a highly organized process by which multicellular organisms eliminate damaged, superfluous and potentially harmful cells. Apoptosis is the most studied form of programmed cell death. It is characterized by typical morphological and biochemical changes which are a consequence of activation of cysteine proteases, caspases. Apoptosis is …

The problem of structure determination of membrane proteins is addressed with a new combination of site-directed spin labelling (SDSL) electron paramagnetic resonance (EPR) spectroscopy and structure modelling of a protein and its conformational spaces. This new approach is aimed at structural characterization of membrane proteins and intrinsically disordered proteins. In …