Key words: supercritical fluid extraction, carbon dioxide, acid-base hydrolysis, epigean lichen, Peltigera aphthosa, chitin-containing complex
This research was funded with the financial support of the Ministry of Economic
Development, Industry and Science of the Arkhangelsk Region within the framework of the
project «Obtaining a new chitin-containing material (product) for veterinary and biological
purposes from promising plant sources of the Arkhangelsk Region» (agreement No. 2 dated
September 22, 2021), the Ministry of Science and Higher formation of the Russian Federation
in terms of supercritical fluid extraction (project No. FSRU-2021-0009. Instrumentation of
the Core Facility Center «Arktika» of Northern (Arctic) Federal University and «Critical
technologies of the Russian Federation in the field of environmental safety of the Arctic»
(N. Laverov Federal Center for Integrated Arctic Research) was used in this work.