Table 4. Number of Functional Groups (−) in the Wheat Straw Model and Its Components.

	types of functional groups
components	ether groups	hydroxyl groups	aldehyde groups	ester groups	carboxyl groups	carbonyl groups
cellulose	1194	1806
hemicellulose	1308	1274		34	26
lignin	638	275	44	11		44
total	3140	3355	44	45	26	44