This bachelor thesis deals with preparation of odd-numbered hyaluronan oligosaccharides with N-acetylglucosamine at both ends of the chain using enzymatic catalysis by -Glucuronidase. The theoretical part focuses on present knowledge of hyaluronic acid and it fragments. It focuses on properties, enzymatic hydrolysis, application in different branches of science, but also analysis of oligosaccharides. One chapter is devoted to properties of enzyme -Glucuronidase. The experimental part deals with preparation of oligosaccharides type HANN. The reaction conditions for preparation of HA oligosacharides were optimized (pH, temperature) and the progress of enzymatic hydrolysis and the mixture composition after digestion were monitored by method UHPLC.. After optimization the mixture of oligosaccharides HANN was prepared and consenquently it was analysed by methods UHPLC and LC-MS. All the data were acquired in company Contipro Pharma, a.s., Dolní Dobrouč, Czech republic
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