holocellulose

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组分的木质素、全纤维素、聚戊分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较经纬地区的白桦，可以降低灰分、抽出物、木素含，综纤维素和聚戊糖含。