本文对比了在离体条件下美洲大蠊消化道组织匀浆羧酸酯酶与胆碱酯酶对敌百虫的亲和力，前者比后者大23倍。
Enzyme kinetics investigation revealed that the affinity of gut carboxylesterase of Periplaneta americana (L. ) for dipterex was 23 times greater than that with the cholinesterase.
因为纳米砖比药物分子大很多，我们相信前者是后者的好几百倍，药物的分子被分流，而且必须经过一条更长的途径。 这样就延长的药物的药效。
Because the nanobricks are so much bigger than the drug molecules - we believe a few hundred times bigger - the molecules get diverted and must travel a longer path.
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