The duration of PAE was determined by the optical density method.

应用光密度法测定抗生素后效应.

Result: XST injection could reduced nerve cell apoptosis, and the intergral optical density of the apoptotic.

结果: 血塞通能明显降低神经细胞凋亡百分率, 降低凋亡神经细胞积分光密度,减轻病理损害.

Result:XST injection could reduced nerve cell apoptosis, and the intergral optical density of the apoptotic.

结果：血塞通能明显降低神经细胞凋亡百分率，降低凋亡神经细胞积分光密度，减轻病理损害。

Keeping other factors constant, the humus formed under submerged conditions generally had a higher HA/FA ratio and a lower optical density (E_4) of HA than that formed under upland conditions.

在其它条件相同时，与旱地条件下的相比，渍水条件下腐解产物的HA/FA大多较宽，而胡敏酸的光密度（E_4）值则较小。

An optical density curve model for optimizing the dye coating process of recordable disc is introduced.

利用光密度曲线模型优化可写光盘的染料旋涂工艺.

If double film viewing is required, the optical density of one single film shall not be lower than 1.3.

如果要求评审双底片，单 张底片的黑度不得低于1。

Results: After ischemia, the optical density ( OD ) of synaptophysin positive products decreased and the number of synaptic terminals also decreased.

结果：脑缺血后，随缺血时间的延长，突触体素的表达逐渐减少；