| Popis: |
The distribution of carotenoids in 10 species of diatoms was determined qualitatively and quantitatively. Monoacetylenic carotenoids (diatoxanthin and diadinoxanthin, 12–43% of total), allenic carotenoids (fucoxanthin and fucoxanthinol, 49–81% of total), monoepoxides (diadinoxanthin, fucoxanthin and fucoxanthinol, 79–91% of total) and β,β-carotene (3–8% of total) were identified and analysed by methods including TLC, HPLC, MS, VIS and cochromatography with authentic standards. Trace amounts of echinenone and canthaxanthin were obtained from Navicula pelliculosa. Chemosystematic considerations are made. |
