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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 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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Bone densitometry
ŠÍRKOVÁ, Eliška
According to the World Health Organization (WHO) osteoporosis is defined as: "Increasing of systemic disease of skeleton. The characteristic feature is the lack of bone substance and disorders of microarchitecture of bone tissue. The result of the disorder is disposition to fractures. Earlier the disease was not diagnosed until it got to the stage of occurrence of osteoporotic fracture. Nowadays it is anticipated by means of BMD. Especially women at the age of postmenopause and older men are invited for the medical check-up. However, younger people and even children are invited too. The main indications for the BMD measurement are women who stopped a hormonal curing by using estrogen or they are at the age of postmenopause. It is also recommended for patients with increased occurence of fractures caused by small force and for patients who had a big weight loss. Last, but not least, it is good for men in their seventies, patients who are considering the pharmacological treatment and of course patients with visible effects of the treatment. The densitometry medical check-up itself, known as DEXA, is painless and non-invasive method, using which we can find comprehensive information about the amount of bone mineral in examined section of bone. The parts, where the density is measured, are the parts that are the most abraded. These are vertebrae L1 L4, distal antebrachium, proximal femur, ribs and proximal humerus. It is necessary to check BMD patients with the same apparatus and software during the each medical check-up. For the checking measurement the patients comes every year. Nevertheless, not later than after the two years after the first medical check-up. The purpose of the thesis is research including two main points: analysis of the data acquired from densitometric station of 'Nemocnice České Budějovice a.s. and omparison of the data of patients with a regard to age, sex and the kind of disease. Based on the research it was found out, that division of the patients into groups according to the diagnosis is not conforming. 95% of patients are suffering from various stages of osteoporosis. Only 5% of patients have different diagnosis. Based on the data from the research it was found out that there are ten-times more women who undertook the medical check-up. It is clear, why mainly women undertake the osteoporosis medical check-up. The sudden change of metabolism of bones, mostly related to climacteric, the end of treatment using estrogen, or lactation, is difficult situation and it is very stressful for the whole organism.
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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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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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