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An Alkali-soluble Polysaccharide from the oak lichen Cetraria islandica (L.) Ach.
Authors:Mirjana Hranisavljević-Jakovljević  Jelena Miljković-Stojanović  Radmila Dimitrijević  Vukić M. Mićović
Affiliation:

Department of Chemistry, Faculty of Science, University of Belgrade and Institute of Chemistry, Technology and Metallurgy, Belgrade Yugoslavia

Abstract:An alkali-soluble polysaccharide, [α]
/></figure> +<strong>43</strong>° (M sodium hydroxide), containing d-glucose and d-glucuronic acid has been isolated from the oak lichen <em>Cetraria islandica</em> (L.) Ach. On the basis of methylation, periodate oxidation, and partial hydrolysis studies, the polysaccharide has been shown to contain (1→3)-linked glucopyranose and glucuronic acid residues and (1→4)- and/or (1→6)-linked gluco-pyranose residues as the main structural features of the basic chain. A preponderance of β linkages, indicated by the low optical rotation and the i.r. spectrum, was corro-borated by the formation of laminaribiose, cellobiose, and gentiobiose on partial hydrolysis.</td>
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Keywords:
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