聚羟基乙酸的经典制备方法主要有两种:直接缩合聚合法和乙交酯开环聚合法.There are two means available for the preparation of PGA - synthesis polymerization and ring - opening polymerization....
They were comparing notes on each other's progress towards solving that most taxing of all puzzles: the riddle of the human genome.他们就解决人类所面临的最大难题，即人类基因组之谜的进展情况交换了意见。Genome - based Celera Genomics, the private compa...