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13.
Čaj : izločanje kofeina in čreslovin iz čaja, glede na čas kuhanja : [raziskovalna naloga]
Pavšar, Helena ; Majcen, Urban
V prvem delu naloge je na kratko predstavljen čajevec, njegova zgodovina, načini predelave in drugi podatki, ki so pomembni za poznavanje čaja. Drugi del naloge pa je predvsem raziskovalen. Avtorici ...je zanimalo, kako se kofein in čreslovina izločajo iz čaja glede na čas kuhanja. Količino izločenega kofeina sta določali s pomočjo tekočinske kromotografije (HPLC), čreslovine pa z metodo kožnega praška.
Type of material - research report
Publication and manufacture - Celje : Srednja tehniška šola Celje, Gimnazija Lava
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