ANTIBACTERIAL EFFECTS OF LICHEN SUBSTANCES. I. COMPARATIVE STUDIES OF VARIOUS LICHEN SUBSTANCES

Abstract
As described in our previous report, the antibacterial actions of lichen extracts were studied by some investigators.We also investigated on the relation between the antibacterial effects and chemical constitution of usnic acid, which is widely distributed in lichen.The purpose of this paper is to report the results of a systematic study of the antibacterial effect of various types of lichen substances. In this report, we present our studies on antibacterial activities of 23 substances belonging to various groups as classified by Asahina.

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