PROPERTIES AND USES OF CELL WALLS 



99 



ketones; phenols and methoxyl benzenes; paraffin and olefinic 

 hydrocarbons; benzene, polycyclic compounds and furanes; 

 ammonia, amines and pyridines. 



Table 2. Effects of Orientation on Mechanical Properties 



(in kg/mm 2 ) 



Studies comparing whole wood and cell wall components 

 have aided in identifying the sources of some distillation products. 

 Thus, methanol and acetic acid are derived principally from 

 components other than cellulose or lignin; acetic acid from acetyl 

 sources (hemicelluloses or pentosans); methanol from aromatic 

 and nonaromatic methoxyl groups. Furane derivatives also 

 originate in the pentosans. The phenols, methoxybenzenes, and 

 other benzenoid compounds are derived from lignins. Cellulose 

 contributes large amounts of water soluble glucosans, and a moder- 

 ate amount of charcoal. 



