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The Electrochemistry of Natural Pigments
Sokolová, Romana ; Degano, I. ; Hromadová, Magdaléna ; Pospíšil, Lubomír
The electrochemical properties of flavonoid compounds (hemotoxylin, quercetin) were studied in buffered aqueous and non-aqueous solutions. The role of the preceding protonation/deprotonation on the electron transfer was estimated. The absorption spectra of these compounds, which contain a chromophore, were recorded during their oxidation. The electrochemical techniques were combined with GC-MS analysis in order to identify the degradation products. The mechanism of the formation of degradation products will be discussed.
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Přenos kadmia přes biologické membrány
Šestáková, Ivana ; Navrátil, Tomáš
From complexing ligands, low molecular weight organic acids are important as plant exudates in soil solution, whereas sulfur containing - ligands phytochelatins - sequester Cd2+ inside the cell vacuole. Voltammetrically determined fytochelatins concentration could be correlated with total Cd concentration found in different parts of plant.
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