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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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Occurance of urinary stones in the CR and simulation of conditions of their rise.
Zbořilová, Eliška ; Márová, Ivana (referee) ; Vránová, Dana (advisor)
The aim of this diploma thesis was identification of urinary concrements by the infrared spectroscopy and study of conditions of formation of the most frequent urinary stones (calcium oxalates) by the thermodynamic simulation. The theoretical part of this study includes basic information about problems with urolithiasis and technique of identification of urinary concrements. Important part has been devoted to the thermodynamic simulation of formation of calcium oxalate concrements and on this simulation were determinated the conditions for formation of urinary stones. The experimental part contains analysis of real urinary concrements by the infrared spectroscopy and statistical evaluation of the file of 50 149 samples, which were analysed in years 1994 - 2010.
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Application of infrared spectrometry in the activities of Fire Rescue Brigade
Racek, Stanislav ; Vávrová, Milada (referee) ; Čáslavský, Josef (advisor)
This diploma work is aimed at the use of infrared spectrometry by Fire Brigade Units of the Czech Republic. A new portable instrument True Defender FT produced by Ahura was used for this purpose. It was lent by the Institute of Citizens´Protection in Lázně Bohdaneč. The goal of this work is to get acquainted with this instrument and to evaluate its ability to identify unknown substances. Experimental part was aimed at the testing of this spectrometer with the help of model sample set, containing samples from real situations solved by members of Fire Brigade Units of the Czech Republic. Possibilities of mobile infrared spectometer True Defender FT and mobile Raman spectometer First Defender are finally compared.
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Creation of database of heterogenous systems FT – IR spectra
Hajzler, Jan ; Ptáček, Petr (referee) ; Opravil, Tomáš (advisor)
The aim of this thesis was to create a FT – IR database of heterogenous inorganic samples. The contents of the theoretical part include an introduction to infrared radiation and display the theoretical basis for measurement in a concise form. The experimental part consists of two areas. The first area focuses on the measurement of IR spectra of chosen samples. The measured samples are mostly based on silicon dioxide. The second area of the experimental part studies the influence of the selected method of measurement on the results of the measurement. The experiment examines two methods of measurement of the IR spectra, one being carried out with the use of KBr tablets and the other using the ATR accesory. Both of these methods were measured in the middle infrared and far infrared region.
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Determination of content of selected nonsteroidal antiphlogistic – Ibuprofen in drugs using UV/Vis and FTIR spectrometry
Lindovský, Jiří ; Sovová, Šárka (referee) ; Enev, Vojtěch (advisor)
The main aim of bachelor thesis was to validate the content of the nonsteroidal antiphlodstic in drugs using spectrometric methods and subsequent comparison of results. Specifically, the thesis is focused on Ibuprofen, which is used mainly as analgesic and antipyretic. This substance was chosen for its significant ability of absorbing electromagnetic radiation in ultraviolet and infrared regions of spectra. For this purpose, various generics were selected and analyzed by molecular absorption spectrometry (UV/Vis) and infrared spectrometry with Fourier transform (FTIR). Very important factor influencing chemometric properties of the obtained results was optimalization of the spectrometric methods. After designing the working procedure, sample solutions were prepared from Ibuprofen-containing dosage forms using suitable solvent and these samples were analyzed spectrometrically. The content of Ibuprofen in individual samples was calculated from the measured UV/Vis and FTIR spectra using method of standard addition. The results show that infrared spectrometry seems to be more suitable method for determining the Ibuprofen content. Nevertheless, it should be noted that the choice of a suitable extractant is very important step in the determination. The information obtained from this bachlor’s thesis could be used in future routine inspections and monitoring of drugs.
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Physicochemical characterization of soil humic substances isolated from modal brown soil
Churina, Iuliia ; Doskočil, Leoš (referee) ; Enev, Vojtěch (advisor)
This bachelor thesis deals with the physicochemical characterization of soil humic substances isolated from brown earth modal based on the international IHSS procedure. Humic substances are organic compounds occurring in soil and have a significant influence on soil processes and properties. The aim of this work is to obtain detailed information on the physical and chemical properties of humic substances such as mean molecular weight (Mr), spectral characteristics, elemental composition and thermal stability. Soil humic substances samples were characterized by thermal techniques such as thermogravimetric (TGA) and elemental analysis (EA). Different instrumental methods such as UV/Vis spectrometry, infrared spectrometry and fluorescence spectrometry were used to analyze the samples. The results of this work can contribute to a better understanding of soil processes and properties, which can lead to improved agricultural production and environmental protection.
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Determination of content of selected nonsteroidal antiphlogistic – Ibuprofen in drugs using UV/Vis and FTIR spectrometry
Lindovský, Jiří ; Sovová, Šárka (referee) ; Enev, Vojtěch (advisor)
The main aim of bachelor thesis was to validate the content of the nonsteroidal antiphlodstic in drugs using spectrometric methods and subsequent comparison of results. Specifically, the thesis is focused on Ibuprofen, which is used mainly as analgesic and antipyretic. This substance was chosen for its significant ability of absorbing electromagnetic radiation in ultraviolet and infrared regions of spectra. For this purpose, various generics were selected and analyzed by molecular absorption spectrometry (UV/Vis) and infrared spectrometry with Fourier transform (FTIR). Very important factor influencing chemometric properties of the obtained results was optimalization of the spectrometric methods. After designing the working procedure, sample solutions were prepared from Ibuprofen-containing dosage forms using suitable solvent and these samples were analyzed spectrometrically. The content of Ibuprofen in individual samples was calculated from the measured UV/Vis and FTIR spectra using method of standard addition. The results show that infrared spectrometry seems to be more suitable method for determining the Ibuprofen content. Nevertheless, it should be noted that the choice of a suitable extractant is very important step in the determination. The information obtained from this bachlor’s thesis could be used in future routine inspections and monitoring of drugs.
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Analýza vybraných potravin metodou NIR
Bočková, Tereza
BOČKOVÁ, T. Analysis of selected foods by NIR, Master thesis, MENDELU in Brno, 2015, 72p. The aim of the thesis was to examine samples of regionally grown cereals, oilseeds and legumes using NIR analyzer DA 7200 and compare the results to the tables and chemical analysis. A total of 26 samples were used. For the whole, crushed and milled grains and seeds, according to the type of the sample, analysis of water, crude protein, crude fiber, crude fat and starch were made. The content of crude protein was verified by the chemical laboratory. NIR measurements showed discrepancies in the case of evaluation of individual substances for the whole, crushed and milled grains or seeds, although the same material was used and the measured values should be similar. We have detected for example crude protein content in Apache (Litava) wheat sample by NIRS analysis 129,3 +- 1,78 g.kg-1 for the whole grains, 116,5 +- 0,72 g.kg-1 for the crushed grains and 100,9 +- 2,71 g.kg-1 for the milled grains. The chemical analysis for the same sample showed the value of 120,8 g.kg-1. According to the literature, the crude protein content in wheat should be between 118 and 132,1 g.kg-1. When evaluating the characteristics of the whole, crushed and milled samples crude protein content reached 135,6 +- 8,78 g.kg-1 for the whole, 132,3 +- 9,97 g.kg-1 for the crushed and 130,5 +- 11,55 g.kg-1 for the milled samples. Given that the crude protein measurement results were in accordance with the chemical analyses and the tabular values, it is apparent that the NIR analyzer is working properly. The results of this thesis, however, bring the presumption that the device setting is now not suitable for multiple analyses of different materials.
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Application of infrared spectrometry in the activities of Fire Rescue Brigade
Racek, Stanislav ; Vávrová, Milada (referee) ; Čáslavský, Josef (advisor)
This diploma work is aimed at the use of infrared spectrometry by Fire Brigade Units of the Czech Republic. A new portable instrument True Defender FT produced by Ahura was used for this purpose. It was lent by the Institute of Citizens´Protection in Lázně Bohdaneč. The goal of this work is to get acquainted with this instrument and to evaluate its ability to identify unknown substances. Experimental part was aimed at the testing of this spectrometer with the help of model sample set, containing samples from real situations solved by members of Fire Brigade Units of the Czech Republic. Possibilities of mobile infrared spectometer True Defender FT and mobile Raman spectometer First Defender are finally compared.
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Occurance of urinary stones in the CR and simulation of conditions of their rise.
Zbořilová, Eliška ; Márová, Ivana (referee) ; Vránová, Dana (advisor)
The aim of this diploma thesis was identification of urinary concrements by the infrared spectroscopy and study of conditions of formation of the most frequent urinary stones (calcium oxalates) by the thermodynamic simulation. The theoretical part of this study includes basic information about problems with urolithiasis and technique of identification of urinary concrements. Important part has been devoted to the thermodynamic simulation of formation of calcium oxalate concrements and on this simulation were determinated the conditions for formation of urinary stones. The experimental part contains analysis of real urinary concrements by the infrared spectroscopy and statistical evaluation of the file of 50 149 samples, which were analysed in years 1994 - 2010.
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