Lichenine
Structural formula | |||||||
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General | |||||||
Surname | Lichenine | ||||||
CAS number | 1402-10-4 | ||||||
Monomers / partial structures | glucose | ||||||
properties | |||||||
Physical state |
firmly |
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safety instructions | |||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Lichenin , also known as lichen starch or moss starch, is a colorless and tasteless polysaccharide , more precisely a glucan , which occurs as a storage carbohydrate in various lichens and mosses and in smaller quantities in vascular plants . It is found in high concentrations in Icelandic moss ( Cetraria islandica ) and in beard lichens ( Usnea ) , for example . In oats and barley, lichenine can make up 6 to 8 percent of the dry matter, in wheat and rye a maximum of around 2 percent.
Chemical properties
Chemically, lichenine is an unbranched polysaccharide of glucose , similar to cellulose , but besides β-1 → 4-glycosidic linkages it contains about 30% 1 → 3-glycosidic branches. In contrast to cellulose, it is water soluble and gives in boiling water in a colloidal solution, which is why it to the nutrition science to the mucilage is counted. Because the β-1 → 4 linkages make the lichenine indigestible, lichenine is also a fiber .
literature
- Robert Ebermann, Ibrahim Elmadfa: Textbook food chemistry and nutrition . Springer, Heidelberg 2007, ISBN 978-3-211-48649-8 .
- R. Hegnauer: Chemotaxonomy of Plants: VOL 1: Thallophyten, Bryophyten, Pteridophyten und Gymnospermen . Birkhäuser, 1962, ISBN 978-3-7643-0164-4 .
Individual evidence
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.