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Properties of novel magnetoelectric and multiferroic ceramic materials
Osička, Luděk ; Kachlík, Martin (referee) ; Maca, Karel (advisor)
Literature search about properties of magnetoelectric and multiferroic ceramic materials was made. Ferromagnetism and ferroelectricity and requirements for materials in which both of these properties can exist in the same phase were discussed. Further, multiferroics were classified by mechanism of ferroelectricity and by their crystal structure. Finally, multiferroic and magnetoelectric composites and some examples of strong magnetoelectric effect in multiferroics were described. In experimental part of this bachelor thesis preparation of specimens of magnetoelectric perovskite EuTiO3 was described. Prepared specimens had higher density than specimens described in literature and were phase-pure and they are suitable for research of magnetoelectric properties of EuTiO3 by infrared spectroscopy.
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Exploitation of Infrared Spectroscopy for Determination of Polymer Admixtures in Cement Composites
Novotný, David ; Hodná, Jana (referee) ; Petránek, Vít (advisor)
In the thesis deals with the possibilities of determining the amount of polymer additives FTIR. Are described in detail various polymeric ingredients which are used in concrete mixtures. Then thoroughly discuss the use of recyclable polymer additives polyvinylbutyral (PVB), its production, the primary use, recycling and subsequent use. Next, I will discuss methods for determining the amount of polymer in the substance. In the experimental part were blended with several samples with different percentage for each polymer. Where we conducted appropriate tests and assessments, and individual samples are briefly described, evaluated and compared.
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The relationship between kidney stone formation and the composition of food.
Zbořilová, Eliška ; Márová, Ivana (referee) ; Vránová, Dana (advisor)
This bachelor’s thesis deals with causes of formation and identification of urinary concrements. The theoretical part of this study includes basic definition of problems with urolithiasis, points to risk factors of formation of urinary concrements and deals with their classification in accordance to their chemical composition. Important part of this study has been devoted to dietary habits, because composition of ingested food and daily intake of liquids is very important for formation of concrement in urinary tract. Analysis of urinal concrement and following identification of its composition is absolutely unavoidable for definition of subsequent therapeutic method of treatment of urolithiasis. In the experimental part, infrared spectroscopy has been used for analysis of urinal concrements. The calibration lines of the most frequent two-component mixtures of urinary concrements have been scaled by this method
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Portable devices for infrared and Raman spectroscopy: methodology of their use within non-invasive survey of paintings in situ
Čermáková, Zdeňka ; Košařová, Veronika
Aim of the methodology is to determine the limits of use of currently available portable IR and Raman spectrometers for the analysis of painted artworks, describe the complicating factors during the measurement and especially within the subsequent interpretation of spectra, which is critical for the overall process. As a result, a practical guidance for the inclusion of non-invasive spectroscopic methods to standard survey of paintings is provided. The methodology is focused on easily portable spectrometers which can be introduce for the analysis of cultural heritage objects directly on-site, and which thereby achieve high flexibility of use.
Fulltext:  PDF; PDF
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Effect of spruce swamp forest drainage and restoration on soil organic matter quality
MASTNÝ, Jiří
The aim of the study was to determine the effect of spruce swamp forest drainage and water regime restoration on soil organic matter (SOM) quality. Six localities of spruce swamp forests in Šumava Mountains were studied (2 drained, 2 restored and 2 pristine). SOM quality was affected by long-term drainage. Spruce swamp forest restoration (3-7 years) did not have significant effect on SOM quality although other parameters (pH, bulk density, water level, plant coverage) changed.
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Limitations of spectroscopic methods in the study of earthy pigments
Košařová, V. ; Hradil, David ; Kanický, V.
Nowadays, the spectroscopic methods, above all Infrared Spectroscopy (IR), are the most frequently used analytical methods in the research of cultural heritage, which is mainly caused by easy use and non-invasiveness of these methods and a broad range of their application, which comprises both organic and inorganic substances. Nevertheless, each analytical technique has its detection limits, and the fact that a particular method is suitable for one type of a sample does not automatically mean that it will be appropriate for the identification of another sample. Therefore, the aim of the study is to demonstrate the limitations of both Raman Spectroscopy (RS) and infrared spectroscopy in the study of earthy materials.
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Limitations of spectroscopic methods in the study of earthy pigments
Košařová, V. ; Hradil, David ; Kanický, V.
Nowadays, the spectroscopic methods, above all infrared spectroscopy (IR), are the most frequently used analytical methods in the research of cultural beritage, whitch is mainly cause by easy use and noninvasiveness of these metods and a broad range of thein application, which comprises both organic and inorganic substances. Therefore, the aim of the study is to demonstrate the limitations of both Raman Spectroscopy (RS) and infrared spectroscopy in the study of earthy materials.
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How vibrate atoms in molecules
Trchová, Miroslava
Basis of vibration spectroscopy. Principles of FTIR spectrometry. Basis of the interpretation of the spectra. Experimental techniques used in the FTIR spectroscopy. Measurements of the spectra of thin films, membranes, surfaces, polymers, gels, viscous materials, rubbers, clays, powders and porous materials. Principles of reflection techniques (ATR, SR and DRIFTS).
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