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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Study of natural compounds of elderberry flowers
 Pončíková, Alžbeta ; Skoumalová, Petra (oponent) ; Veselá, Mária (vedoucí práce)
The aim of this bachelor thesis was to determine the concentration of bioactive substances such as polyphenols and flavonoids and also the total antioxidant capacity in extracts from flowers of elder. The second part was the subject of an experiment to determine the antimicrobial activity. The theoretical part deals with the description of individual bioactive substances, the description of the elder and the bacteria used. In the experimental part, aqueous extracts were prepared, in which total polyphenols, flavonoids and oxidizing activity were determined. The results of the determination of polyphenols and flavonoids show that in order to achieve a higher content of flavonoids and polyphenols, it is more appropriate to use the highest possible initial temperature for leaching the base flower. No significant differences were found when comparing the antioxidant activity of solutions from the average values. The extracts did not show significant antimicrobial activity.
Úplný záznam
Study of natural compounds of elderberry flowers
 Pončíková, Alžbeta ; Skoumalová, Petra (oponent) ; Veselá, Mária (vedoucí práce)
The aim of this bachelor thesis was to determine the concentration of bioactive substances such as polyphenols and flavonoids and also the total antioxidant capacity in extracts from flowers of elder. The second part was the subject of an experiment to determine the antimicrobial activity. The theoretical part deals with the description of individual bioactive substances, the description of the elder and the bacteria used. In the experimental part, aqueous extracts were prepared, in which total polyphenols, flavonoids and oxidizing activity were determined. The results of the determination of polyphenols and flavonoids show that in order to achieve a higher content of flavonoids and polyphenols, it is more appropriate to use the highest possible initial temperature for leaching the base flower. No significant differences were found when comparing the antioxidant activity of solutions from the average values. The extracts did not show significant antimicrobial activity.
Úplný záznam

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