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- W2019418902 abstract "A 294 cm long sediment core is divided into 1 cm disks at intervals of 7 cm. The disks are pollen-stratigraphically dated. At the same time, the pigment content is determined by two-dimensional thin-layer chromatography. The pigments were determined spectrophotometrically between 200 and 800 nm, six pigments having been identified, whereas in the chromatograms 13… 36 spots are found. Chlorophyll conversion products as well as epiphasic and hypophasic carotenoids were determined by liquid adsorption. The greatest variety was found with the pigments in the Atlantic period, the minimum of diversity lies in the Subboreal period. The concentration of the chlorophyll derivatives decreases with the age of sediments, whereas the carotenoids have maxima in the Atlantic and Subatlantic periods. On the basis of the ratio of chlorophyll derivatives to carotenoids and of the ratio of epiphasic carotenoids to hypophasic ones, the trophic state of the lake between oligotrophic and eutrophic as well as the relative share of autochthonous and allochthonous feed of matter to the sediment can be represented well." @default.
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- W2019418902 date "1985-01-01" @default.
- W2019418902 modified "2023-09-27" @default.
- W2019418902 title "Stratigraphy of Fossil Pigments as a Guide to the Environmental Changes of the Kortowskie Lake, Poland" @default.
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- W2019418902 doi "https://doi.org/10.1002/aheh.19850130304" @default.
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