Hydroxyl values of straw alkali lignin and modified ligninresin were determined by potentiometric titration in suitable composite acylation system.
选用合适的复合酰化体系，通过电位滴定，测定了工业碱木质素及其改性树脂的羟值。
2
Dietary fiber is generally not be digested food nutrients, mainly comes from the plant cell, including hemicellulose, cellulose and lignin pectin and resin, etc.