Atranorin 1, Usnic acid 2, and D-Arabinitol 3 were isolated from Usnea aciculifera by extensive column chromatography. The structures elucidated based on the comprehensive spectral analysis including FT IR, GC MS, ESI 13C NMR, 1H NMR. compounds evaluated for their cytotoxic activity against LN-229 glioblastoma cancer cell line performing Sulforhodamine B assay (SRB). 2 showed strong with an IC5...

Fungal secondary compounds and total extracts are known to affect growth of bacteria, fungi, and plants. This study tested the effects of purified compounds and total extracts from three lichens on the growth of two plant pathogens, Ophiostoma novo-ulmi ssp. americana and Sclerotinia sclerotiorum. Usnic acid showed no reduction in relative growth rates (RGR), whereas vulpinic acid reduced RGR f...

The crude extract contains many compounds along with the various lichen metabolites and it is very difficult to say which compound(s) has the antioxidant potential unless and until it is purified. In the previous Chapter 3 & 4 the biological activities of Usnea ghattensis attributed to the crude extract containing usnic acid and norstictic acid have been presented. In order to know the antioxid...

In this study, antioxidant and antimicrobial potentials of Usnea intermedia, U. filipendula, and U. fulvoreagens and their stictic and usnic acid contents were investigated. Antioxidant activity and total phenolic contents were evaluated in acetone, ethanol, and methanol extracts of these three species. Antioxidant activity was measured by ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic...