Table 1. Yield and sugar composition of each polysaccharide fraction obtained by stepwise extraction of rice endosperm cell wall.
| Fraction | Yield (%) | Sugar composition (mol%) | ||||||
|---|---|---|---|---|---|---|---|---|
| Fuc | Rham | Ara | Gal | Glc | Xyl | Man | ||
| Hot water extract | 11.3 | 0.4 | 3.7 | 21.8 | 8.3 | 51.3 | 14.4 | 0 |
| Hot ammonium oxalate extract | 9.3 | 0.4 | 2.6 | 15.0 | 5.2 | 62.8 | 14.0 | 0 |
| 4 M NaOH extract | 43.1 | 0.1 | 0.4 | 16.0 | 2.1 | 38.5 | 23.9 | 19.0 |
| α-Cellulose | 24.3 | 0 | 0 | 2.0 | 0.3 | 85.8 | 3.3 | 8.7 |
| Glucomannan (crude)* | 3.7 | 0 | 0.4 | 7.6 | 1.7 | 8.6 | 11.0 | 70.8 |
| Glucomannan (purified)* | 1.1 | 0 | 0 | 0.7 | 1.2 | 8.0 | 1.1 | 89.1 |
A typical result from repeated fractionation experiments is shown here. *Glucomannan preparations were purified from the α-cellulose fraction and their yields were shown as the percentage of the original endosperm cell wall preparation.