نتایج جستجو برای: usnic acid
تعداد نتایج: 747448 فیلتر نتایج به سال:
A chromatographic method is described for the purification and characterization of secondary lichen substances with biological activity. A simple reversed-phase high-performance liquid chromatography method with gradient elution has been developed that allows the determination and isolation of salazinic, usnic and stictic acids from lichen samples in a single run and the quantification of every...
AIM The identification and evaluation of lichen metabolite production by the epiphytic lichenized ascomycete Ramalina lacera collected from different substrates: Crataegus sinaicus, Pinus halepensis, and Quercus calliprinos. METHODS Chemical constituents were characterized by GC MS, HPLC, HR TLC, and other chemical methods. RESULTS The most abundant fatty acids were alpha-linolenic acid, ol...
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