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Characterization catanionic vesicular system by HRUS
Kopřivová, Hana ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
This bachelor thesis is about catanionic vesicular systems, which could serve as carriers of drugs or genes in the future. These systems are prepared from the cationic surfactants CTAB and DDAC, the anionic surfactant SDS and cholesterol, which serves as a stabilizer. In the experimental part, these vesicles were characterized by high-resolution ultrasonic spectroscopy. The behavior of systems with different percentages of cholesterol was monitored. As next, the temperature properties of the vesicles were studied using temperature scans between 10 °C and 65 °C. The density of the samples was examined by densitometry at temperatures of 25 °C and at a human body temperature of 37 °C.
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Ozone gas-fading of photographs
Védlová, Petra ; Kozáková, Zdenka (referee) ; Veselý, Michal (advisor)
This bachelor thesis deals with principels of inkjet printing, ink composition and print media. The paper also focuses on stability of inkjet prints, degradation of inks by ambient impacts, mechanisms of such degradations and protection against degradation. The experimental section examines the impact of ozone on gas-fading of injekt prints, which is one of the most important factors by degradation of dyes for both clasic prints and prints with protective varnish. In conclusion two methods for assessing dye degradation – colorimetric (by calculating the volume of the color gamut) and densitometric (by calculating optical densities) – are investigated and compared.
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Characterization of carrageenan by densitometry
Poledňáková, Halina ; Krouská, Jitka (referee) ; Hurčíková, Andrea (advisor)
The density of the carrageenan solution was investigated by densitometry depending on temperature and concentration. Subsequently, ultrasonic velocity was examined using densitometry and high-resolution ultrasonic spectroscopy. The measurements were executed using aqueous and sodium chloride solutions of carrageenan in a broad range of concentrations. It was found that the carrageenan samples are not liable to irreversible changes of density and ultrasonic velocity in dependence on temperature and concentration . Furthermore, it was proved that carrageenan in both mediums is stable, the samples do not exhibit degradation or changes in the properties of the ionic strength effect.
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The intrecations of dextran with surfactant SDS
Marčanová, Milada ; Kalina, Michal (referee) ; Hurčíková, Andrea (advisor)
Before the itself of characterization interactions of dextran with surfactant SDS, there were investigated properties of dextran solution in water and in sodium chloride. At first it was measured by densitometer, where their density and ultrasonic velocity was investigated, depending on concentration and temperature. The ultrasonic velocity was further measured by high resolution ultrasonic spectroscopy. Subsequently the interactions of dextran with surfactant SDS was examined to determine the critical aggregation and critical micelle concentration.
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Characterization of pectin by ultrasonic spectroscopy
Trtek, Jan ; Kalina, Michal (referee) ; Hurčíková, Andrea (advisor)
Pectin solutions of various concentration in water has been investigated using high resolution ultrasonic spectroscopy. Furhermore, the influence of solvent on the properties of solutions by dissolving pectin in 0.15 M aqueous solution of sodium chloride and buffer PBS at pH 7.4. For comparison the properties of the pectin solutions were compared with solutions of pectate. It was found that pectine changes characteristics in differenet solutions. These changes have been observed due to changes in the parameters of ultrasonic waves.
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Radiologist assistant´s work in bone densitometry department
MIKŠOVSKÁ, Kateřina
In the bachelor´s thesis is explains and throughly describes bone density scan. Densitometry measures bone mineral density (BMD) and bone density. The test is used primarily to detect an osteoporosis diagnosis. The examinatio is most often performed on the lumbar spine, vertebras (L1-L4) and a left hip joint. During the examination the right positioning a patient is important. It is also necessary to use suitabla positioning supports and correctly asses and anylyze the picture. Osteoporosis is a bone disease that cause a loss of bone density. It is also called the silent killer, because it ogten develops without ay symptoms or pain. The most common cause a fit is lack vitami D, menopause and some other illnesses. Osteoporosis causes the thinning of bones which can lead to fracture of vertebras, proximal end of a femur, distal section of forearm, fractures of ribs, pelvis and tibia. Losing height up to several centimetres is typice for this disease.
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Characterization catanionic vesicular system by HRUS
Kopřivová, Hana ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
This bachelor thesis is about catanionic vesicular systems, which could serve as carriers of drugs or genes in the future. These systems are prepared from the cationic surfactants CTAB and DDAC, the anionic surfactant SDS and cholesterol, which serves as a stabilizer. In the experimental part, these vesicles were characterized by high-resolution ultrasonic spectroscopy. The behavior of systems with different percentages of cholesterol was monitored. As next, the temperature properties of the vesicles were studied using temperature scans between 10 °C and 65 °C. The density of the samples was examined by densitometry at temperatures of 25 °C and at a human body temperature of 37 °C.
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The intrecations of dextran with surfactant SDS
Marčanová, Milada ; Kalina, Michal (referee) ; Hurčíková, Andrea (advisor)
Before the itself of characterization interactions of dextran with surfactant SDS, there were investigated properties of dextran solution in water and in sodium chloride. At first it was measured by densitometer, where their density and ultrasonic velocity was investigated, depending on concentration and temperature. The ultrasonic velocity was further measured by high resolution ultrasonic spectroscopy. Subsequently the interactions of dextran with surfactant SDS was examined to determine the critical aggregation and critical micelle concentration.
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