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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Enzyme hydrolysis of potato proteins and possibilities of fractionation of obtained peptide fragments
 MIKOVÁ, Klára
The diploma thesis is focused on enzyme hydrolysis of potato protein concentrates and fractionation of obtained peptide fragments. Were used protein concentrate from tubers variety Ornella and protein concentrate obtained by swedish company Lyckeby Starch AB. The enzyme hydrolysis lasted 24 hours and were used the proteolytic enzyme alkalasa and trypsin. In this work were prove possitive effect of enzyme hydrolysis on solubility and antioxidative properties of potato protein isolates. The fractionation of obtained peptide hydrolysated was based on systém FPLC (Fast protein liquid chromatography). The fractions contained of peptide fragments about 1, 350 kDa or fragments of smaller moleculary weight. The antixodative activity of subfractions were determIne by method called DPPH. The highest values (2,2 and 2,6 TEAC g/kg) were accured at the subfractions which were separations from Ornella hydrolyzates digeste by enzyme alkalasa.
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Midgut proteinases in diapausing and post-diapausing adult of the spruce bark beetke \kur{(Ips typographus)}
 ŠTEFKOVÁ, Kristýna
My work concentrates on feeding behavior of overwintering diapausing and post {--} diapausing bark beetles and developmental treshold. This is done either biochemically by measuring the enzymatic activity in the midgut and by assessing the feeding status from the size and consistence of the food bolus in the gut. Detailed knowledge of feeding behaviour and development treshold may help to predict the overwintering success of local populations with all the consequencies for spring dispersal and reproduction.
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Midgut proteinases in diapausing and post-diapausing adult of the spruce bark beetke \kur{(Ips typographus)}
 ŠTEFKOVÁ, Kristýna
My work concentrates on feeding behavior of overwintering diapausing and post {--} diapausing bark beetles and developmental treshold. This is done either biochemically by measuring the enzymatic activity in the midgut and by assessing the feeding status from the size and consistence of the food bolus in the gut. Detailed knowledge of feeding behaviour and development treshold may help to predict the overwintering success of local populations with all the consequencies for spring dispersal and reproduction.
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