|
|
Determination of cyanide content in different parts of elderberry plant
Růžičková, Kristýna ; Štursa,, Václav (referee) ; Diviš, Pavel (advisor)
Elderberry is an abundant shrub or a small tree widely spread in the northern hemisphere. Its fruit and flowers have attracted increasing interest from consumers, pharmaceutical and food industry thanks to their high content of minerals and bioactive compounds. However, elderberry also contain potentially harmful cyanogenic glycosides which can release toxic hydrogen cyanide. The aim of this experiment was to analyse and compare total cyanide content in different plant parts of numerous interspecific hybrids, which were created at University of Maribor. Investigated plants comprised 4 subspecies of Sambucus nigra and 18 interspecific hybrids giving in total 46 elderberry genotypes. Cyanide content was determined by picrate paper method which is based on reaction of picric acid with hydrogen cyanide. The colour change of the picrate paper resulting from the reaction was further analysed using spectrophotometry. The highest cyanide levels were found in leaves reaching up to 1155.9 ± 44.8 CN- mg/kg, followed by inflorescences with maximum of 53.9 ± 3.8 CN- mg/kg, shoots and berries with highest levels of 20.3 ± 1.3 CN- mg/kg and 6.4 ± 0.0 CN- mg/kg, respectively.
|
|
|
Hydrogels based on microemulsions and polyelectrolytes
Růžičková, Kristýna ; Kalina, Michal (referee) ; Mravec, Filip (advisor)
This bachelor thesis deals with preparation and characterization of microemulsion based phase separated hydrogels while using low molecular weight and high molecular weight hyaluronan. Microemulsions were prepared from canola oil, sunflower oil, lemon oil and tea tree oil. As a dye for studies of behaviour of hydrogels was used Oil red O which simulates hydrophobic drug. The main part of this thesis studies the release of this dye from hydrogels by using UV-VIS spectroscopy. The content of the dye in hydrogels was monitored after 24, 48 and 72 hours. Based on measured data we can state that hydrogel prepared from low molecular weight hyaluronan release bigger amount of the dye than hydrogel from high molecular weight hyaluronan. Based on measured data after 72 hours we can say that hydrogel from microemulsion with tea tree oil and hydrogel from microemulsion with lemon oil released bigger amount of the dye than hydrogel without microemulsion. Another advantage of these two hydrogels is increased thougness. Content of sunflower and canola oil indicated rather negative influence on behaviour of hydrogels.
|
|
|
Consociationalism in the Northern Ireland: theory a practice
Růžičková, Kristýna ; Říchová, Blanka (advisor) ; Guasti, Petra (referee)
This diploma thesis deals with the consociational political system in Northern Ireland. This topic appears to be still relevant in the light of recent events, especially Brexit and the non- functional Northern Ireland Assembly. The political system of Northern Ireland is the "flagship" case for both supporters and opponents of the consociational democracy theory. There are many publications about the consociational model in Northern Ireland; however, the publications primarily deal with the early stage of implementing and functioning of the system. It has been 25 years since signing of the Good Friday Agreement and this time frame allows us to evaluate the functioning of the system. That is why this thesis deals with not only the consociational model itself but also with its theoretical reflection and the development of the system since 1998 to this day. The main theoretical frame of the diploma thesis is the consociational democracy theory as defined by Arend Lijphart. The main aim of this thesis is to evaluate the functionig of the political system in Northern Ireland, its positives and negatives and propose possible modifications with respect to the development of the system since signing the Good Friday Agreement to this day, its scholarly theoretical reflection and the development of Northern...
|
|
|
Možnosti fyzioterapeutické intervence u kojenců ve věku 1-3 měsíců s predilekcí
RŮŽIČKOVÁ, Kristýna
My bachelor thesis is focused on possibilities of physiotherapeutical intervention for 1-3 months old infants with predilection. Head predilection is one of the most common diagnosis which currently has been bringing mothers with their newborns to the office of physiotherapists. Correct psychomotor development is important for future health and, therefore, it is very important to discover abnormalities and start a therapy as soon as possible. The goal of my thesis is to generically describe the possibilities of physiotherapy for 1-3 months old infants, and also describe the physiotherapeutical options in case studies of infants aged 1-3 months with predilection. The thesis is split into two parts - theoretical and practical. In the theoretical part, I elaborate on the ideal psychomotor development, its abnormalities and stimulations. Furthermore, the predilection is described along with its differential diagnosis, etiology and risk factors. An important part is also a diagnosis of movement dysfunctions. Options for physiotherapy are described at the end of the theoretical part. The practical part is composed from 3 case studies of probands who were sent to physiotherapy by their pediatrician due to the case of predilection. The case studies contain anamnesis, examination of postural activity, reactiveness and primitive reflexes and subsequently a therapy description. At the end of the thesis, I evaluate the process and results of the therapy. Improvement was observed in all probands after relatively short period of time. This bachelor thesis can be used by physiotherapists as an inspiration of therapeutic procedures for infants with predilection.
|
|
|
Effect of menstrual cycle on performance of women in sport
Růžičková, Kristýna ; Vojtíková, Lenka (advisor) ; Panská, Šárka (referee)
The diploma thesis discusses the possibilities of negative and positive influences on women's menstrual cycle concerning women's performance in sports. The aim of the thesis is to help spread awareness about the mentioned issue and also inspire coaches to be more cautious about this topic while training women. The theoretical part describes the physiological processes of a women's menstrual cycle, hormonal system, and the impact of the menstrual cycle's phases on women's performance in sports. The thesis further analyses the difference between the two menstrual cycle phases in particular endurance performance. The results were completed by adding a poll that focused on personal feelings during testing and in general, the impact of the menstrual cycle regarding sports activities.
|
|
|
Determination of cyanide content in different parts of elderberry plant
Růžičková, Kristýna ; Štursa,, Václav (referee) ; Diviš, Pavel (advisor)
Elderberry is an abundant shrub or a small tree widely spread in the northern hemisphere. Its fruit and flowers have attracted increasing interest from consumers, pharmaceutical and food industry thanks to their high content of minerals and bioactive compounds. However, elderberry also contain potentially harmful cyanogenic glycosides which can release toxic hydrogen cyanide. The aim of this experiment was to analyse and compare total cyanide content in different plant parts of numerous interspecific hybrids, which were created at University of Maribor. Investigated plants comprised 4 subspecies of Sambucus nigra and 18 interspecific hybrids giving in total 46 elderberry genotypes. Cyanide content was determined by picrate paper method which is based on reaction of picric acid with hydrogen cyanide. The colour change of the picrate paper resulting from the reaction was further analysed using spectrophotometry. The highest cyanide levels were found in leaves reaching up to 1155.9 ± 44.8 CN- mg/kg, followed by inflorescences with maximum of 53.9 ± 3.8 CN- mg/kg, shoots and berries with highest levels of 20.3 ± 1.3 CN- mg/kg and 6.4 ± 0.0 CN- mg/kg, respectively.
|
|
| |
|
| |
|
|
Hydrogels based on microemulsions and polyelectrolytes
Růžičková, Kristýna ; Kalina, Michal (referee) ; Mravec, Filip (advisor)
This bachelor thesis deals with preparation and characterization of microemulsion based phase separated hydrogels while using low molecular weight and high molecular weight hyaluronan. Microemulsions were prepared from canola oil, sunflower oil, lemon oil and tea tree oil. As a dye for studies of behaviour of hydrogels was used Oil red O which simulates hydrophobic drug. The main part of this thesis studies the release of this dye from hydrogels by using UV-VIS spectroscopy. The content of the dye in hydrogels was monitored after 24, 48 and 72 hours. Based on measured data we can state that hydrogel prepared from low molecular weight hyaluronan release bigger amount of the dye than hydrogel from high molecular weight hyaluronan. Based on measured data after 72 hours we can say that hydrogel from microemulsion with tea tree oil and hydrogel from microemulsion with lemon oil released bigger amount of the dye than hydrogel without microemulsion. Another advantage of these two hydrogels is increased thougness. Content of sunflower and canola oil indicated rather negative influence on behaviour of hydrogels.
|
|
| |
guest ::
RSS feed.