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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Problém negramotnosti ve světě
 Grosmanová, Anna ; Kuna, Zbyněk (advisor)
Práce uvádí do problematiky světové negramotnosti s teoretickou základnou. Práce je rozdělena na 2 části: na teoretickou a empirickou. Cílem teoretické je vymezení pojmu negramotnost a termínů, užívaných v souvislosti s tímto tématem. Cílem empirické části je zjistit aktuální úroveň analfabetizmu a jeho vývoj v průběhu historie na základě získaných dat. Za dílčí cíl je považována komparace negramotnosti ve vyspělých a rozvojových zemích světa.
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The application of plant-derived biologically active substances for shelf-life improvement of elderflower syrup
 Grosmanová, Anna ; Klouček, Pavel (advisor) ; Fraňková, Adéla (referee)
The aim of this thesis was to find biologically active substances that would be suitable as natural conservatives for herbal sirups, in our case elderflower sirup. Because esential oils are among biologically active substances well known for their antimicrobial aktivity we chose thyme, lemongrass and clove bud essencial oils to be tested on the eldeerflower sirup. Potencial use in a private small scale production was one of the reasons for this particular topic and therefore its technological inovation. The emulgated essential oil was mixed with the sirup and observed for 14 days for the colonies forming units (CFU) which was determined by the drop plate technique. Cultivation was done at a room temperature 22° C as its expected by the consumer that sirups may be stored this way. After the cultivation the numbers of colony forming units were counted and turned into a logaritmic value. Clove essential oil proved a significant difference between control specimen and the essential oil preserved specimen. Statistically remarkable corelation was found also between different concentrations. As well as clove, lemongrass essencial oils proved certain antimicrobiologial activity also with statistical significance. Thyme essential oil proved antimicrobiological activity as well only with no significant difference between concentrations. Essential oils are suitable as natural conservatives for not only their proven antimicrobiological activity but also low price and easy application.
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