Low molecular weight compounds of coal is generally defined as those organic compounds with MW below 500 destributing in skeleton structure of coal macromolecular material.
煤中的低分子化合物一般是指分散于煤的高分子主体结构中的分子量小于500的有机化合物。
2
Starch and cellulose are natural macromolecularcompounds, the most widely distributed in nature, but also the most important polysaccharide.
淀粉和纤维素属于天然高分子化合物,在自然界中分布最广,也是最重要的多糖。
3
Polysaccharide was a kind of macromolecularcompounds with complicated structure.