Chemical purity is not required for food use because cellulosic cell-wall materials are components of all fruits and vegetables and many of their products.
食品应用中不需要化学净化，因为纤维素细胞壁材料是所有果蔬和其它产品的成分。
2
This initial layer formed of both cellulosic and non cellulosicmaterials is called the primary wall.
这个原始的管状结构，由纤维素和非纤维物质构成，称作初生层。
3
Preparation and application of novel cellulosic functional materials, (4) Industrializationof biotechnique in cellulose chemistry.