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1. The occurrence of gold in Usnea auratiaco-atra [110-88_03]
In Usnea aurantiaco-atra (Jacq)- Bory, a lichen species collected in the Antarctica, the gold content was determined by the cupellation methods, 317 ppb and 1089 ppb dry weight were found in the lichen ...


2. Quantitative variations of phenolic compounds related to thallus age in Umbilicaria antarctica in Antarctica [110-88_02]
Densitometric analysis (HPTLC) was used to determine the concentrations of phenolic metabolites in thalli of different ages in Umbilicaria antarctica Frey et Lamb. Usnic acid and atranorin concentrations ...


3. Temporal variation in usnic acid concentration in Usnea aurantiaco-atra in Antarctica [110-88_01]
In Usnea aurantiaco-atra, growing in the Antarctica, a monthly variation in the usnic acid content, in individual thalli, was studied by means of scanning densitometry (HPTLC). The higher accumulation ...


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