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Remittances: the service provider perspective
Zika, Jan ; Cahlík, Tomáš (advisor) ; Pečená, Magda (referee)
The thesis examines international remittances (i.e. cross-border pavments sent by migrant workers) front the perspective of existing or potential Service providers. It explains their economic significance and irnpact, characterizes the consumers involved with remittances and their behavior, describes the remittance process. and classifies and compares remittance transfer mechanisms. It also analyzes globál remittance flows and the consumers' cost. Fuithermore. it summarizes the results of remittance provision rnarket research, reviews representative examples of existing Services, and identifies categories of providers. The thesis then evaluates the strategie positions of existing types of Services, and identifies factors that shoukl distinguish successful providers. Finally. it assesses the business opportunity for new technology providers.
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Development of HPLC method for analysis of food supplements based on berberine extract
Zíka, Jan ; Šatínský, Dalibor (advisor) ; Khalikova, Maria (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistry Candidate: Jan Zíka Supervisor: prof. RNDr. Dalibor Šatínský, Ph.D. Title of the diploma thesis: Development of HPLC method for analysis of food supplements based on berberine extract In this diploma thesis, an HPLC method for the determination of berberine and its related isoquinoline alkaloids aromoline, berbamine, magnoflorine, tetrahydropalmatine, jatrorrhizine, palmatine, tetrahydroberberine and oxyberberine was developed and validated. The method was subsequently applied to the determination of the relevant analytes in the food supplements Allnature Berberin 98% extract, Ostrovit Berberin, Swanson Berberin and GreenFood Berberine. An Ascentis® Express AQ-C18 (150 x 4.6 mm, particle size 2.7 µm) analytical column was used for chromatography analysis, using an acetonitrile/0.085% aqueous solution of phosphoric acid mobile phase. The flow rate of mobile phase was 1 ml/min with a sample injection volume of 5 µl and a column temperature of 30 řC. The gradient elution was used for analysis and detection was performed with a DAD detector at wavelengths of 225 and 345 nm. Key words: HPLC, berberine, aromoline, magnoflorine, berbamine, palmatine, tetrahydropalmatine, jatrorrhizine, tetrahydroberberine,...
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