目的探讨急性脑梗死患者血清基质金属蛋白酶- 9 (MMP - 9)及外周白细胞(WBC)计数的变化。

Objective To study the changes of serum MMP-9 concentration and WBC count in acute cerebral infarction patients.

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目的：观察一氧化氮合酶(NOS)在雏鸡外周前庭系统中的分布。

Objective: To locate nitric oxide synthase (NOS) in the chicken vestibular system.

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由于大量反应是由反应中心位于外周胞质空间的膜结合脱氢酶催化的，所以反应底物不需要转运入细胞内。

As most reactions are catalyzed by the membrane-bound dehydrogenases whose reaction centers locate in the peripheral cytoplasm space, transfer of the substrates into the cell is unnecessary.

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