|
Influence of storage conditions on content of biologically active substances in apple fruits.
Ferdová, Jitka ; Čarnecká, Martina (referee) ; Márová, Ivana (advisor)
This study deals with antioxidants in diet and their effects on human organism. Further, it summarizes the agents affect the quality of apples in the course of long-term storage and it outlines the possibility of defence against them. In the experimental part methods of determination of antioxidant enzymes superoxid dismutase (SOD), catalase and polyphenol oxidace (PPO) in apples were introduced. The enzymes were measured in apples tissues in liquid nitrogen after 158 days in normal or modified atmosphere. In Apple the quantitative and qualitative analysis of proteins was realized. Further, some low molecular antioxidants (total phenolics, total flavonoids and vitamin C) as well as total antioxidant status were measured in frozen raw juice. This values were compared with values from apples analyzed immediately after the harvesting. Artificial inoculation with fungi was made in the last part and the fruitfulness was observed.
|
| |
| |
| |
|
The Mobility and bioavailability of thallium from natural and antropogenic origin.
MILLER, Zbyněk
The aims of this study were to precisely describe information about Tl behaviour in soils especially mobility and bioavailability and at given locality to provide analyses of fungi samples to prove found information. This research continues in early findings concerning Tl geochemical position at the locality of Kluky, Czech Republic where an anomaly in Tl concentration in soil is. From the results in can be concluded that Tl is at given locality distributed unevenly and the Tl concentration in almost all the fungi samples was below the detection limit of analytical method used (inductively coupled plasma mass spectrometry, ICP-MS) with the only exception of Macrolepiota procera, Russula claroflava Grove, Hygrophoropsis aurantiaca, Lycoperdon perlatum. In these fungi samples the found bioconcentration factor, BCF (ratio of Tl concentration in fungi and soil) was relatively higher compared to other plant samples at the locality. Therefore the consumption of the fungi from studied locality can not be recommended.
|
| |
| |
| |
| |
| |