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1. 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 ...


2. 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 ...


3. Preliminary data on the accumulation of usnic acid related to ozono depletion in two lichens [003-94_01]
The absorbing properties of UV radiation of lichen phenols agree with their photoprotector capacity determined by in vivo and in vitro methods. The photostability that characterizes these compounds ...


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