biokk
Senior Member
Thuật ngữ “substituent” trong đoạn văn này được dịch như thế nào? Anh chị dịch giúp em. 
On the basis of the nature of the substituents, four main families can be considered in which the complexity raises from linear to highly substituted xylans. A broad distinction may therefore be made between the arabinoxylans having only side chains of single terminal units of a-L-arabinofuranosyl substituents, the true glucuronoxylans in which a-D-glucuronic acid or/and its 4-O-methyl ether derivative represent the only substituents and the more complex glucuronoarabinoxylan in which a-L-arabionose and a-D-glucuronic (and 4-O-methyl-a-D-glucuronic) acid are present at the same time.
On the basis of the nature of the substituents, four main families can be considered in which the complexity raises from linear to highly substituted xylans. A broad distinction may therefore be made between the arabinoxylans having only side chains of single terminal units of a-L-arabinofuranosyl substituents, the true glucuronoxylans in which a-D-glucuronic acid or/and its 4-O-methyl ether derivative represent the only substituents and the more complex glucuronoarabinoxylan in which a-L-arabionose and a-D-glucuronic (and 4-O-methyl-a-D-glucuronic) acid are present at the same time.
