Polysaccharide constituents of coffee-bean mucilage
Alcohol-insoluble residues (AIRs) were isolated from hand-dissected and commercial mucilages of depulped coffee beans. Both AIRs had similar polysaccharide composition: pectic substances (about 30%), cellulose (about 8%), and neutral noncellulosic polysaccharides (about 18%). Crude pectins were extracted from AIRs (dry-matter yield: about 23% to 35%) with dilute nitric acid (pH 1.5, 90°C). Both pectins contained about 60% uronic acids with high degree of methyl esterification (about 62%) and moderate degree of acetylation (about 5%). Their molecular weights were low (about12 to 29 kDa). They did not gel in the presence of sucrose at acidic pH.
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| Main Authors: | , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | Q02 - Traitement et conservation des produits alimentaires, |
| Online Access: | http://agritrop.cirad.fr/523161/ http://agritrop.cirad.fr/523161/1/523161.pdf |
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