一些多糖物质目前广泛用做血浆代用品,它是抢救和治疗休克的重要药剂。用放射性碳标记的多糖可进行多方面的生物学研究和结构研究;可进行示踪代谢实验的研究,并是一种特别有效而简便的方法。迄今为止,用生物学方法和植物合成法,以~(14)C-CO_2标记多糖,较为复杂,不宜采用;而利用~(14)-氰化物与多糖起缩合反应,制 Some polysaccharides are currently widely used as plasma substitutes, which are important agents for rescuing and treating shock. Radioactive carbon-labeled polysaccharides can be used for a variety of biological and structural studies; trace metabolic experiments can be performed and are a particularly effective and simple method. So far, the use of biological methods and plant synthesis methods to label polysaccharides with ~(14)C-CO2 is more complex and unsuitable to use; however, the use of ~(14)-cyanide and polysaccha-