Polysaccharides in green coffee beans

Polysaccharides in green coffee beans

The polysaccharide fraction in green coffee beans is shown to consist principally of three polymers: an arabinogalactan, a mannan and cellulose. The arabinogalactan has a beta 1-3 linked galactan main chain with frequent arabinose and galactose containing side chains, whereas the mannan resembles cellulose in that it has a linear beta 1-4 linked structure. The mannan has few side-chains, with only about 1 in 100 mannose residues having single galactose residues attached. Comparison of Arabica and Robusta beans indicates that polysaccharide contents and profiles are similar for both types. Of significance is the higher content, on average, 3 per cent, of arabinogalactan in the latter type

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Bibliographic Details
Main Authors: 50655 Bradbury, A.G.W., 75737 Halliday, J., 3180 Association Scientifique Internationale du Café, París (Francia), 32077 12. International Scientific Colloquium on Coffee Montreal (Canadá) 29 Jun - 3 Jul 1987
Format: biblioteca
Published: París (Francia) 1988
Subjects:COFFEA ARABICA, COFFEA CANEPHORA, CAFE VERDE, POLISACARIDOS, ANALISIS QUIMICO, COMPOSICION,
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