The hemicellulose fraction which is rich in D-glucose and mannose residues was further subdivided by treatment with barium hydroxide, then four distinct polysaccharide fractions were obtained.

• 用气相色谱法分析其糖基组成,并将其中葡萄糖和甘露糖基含量较高的组分用氢氧化钡溶液进一步分级,得四个不同的多糖组分。