The refractive index was obtained through measuring the focal position of a capillary filled with the liquid by a reading microscope, and doing a calculation with an analytic formula.
The capillary density was counted under 200 magnified visual field with ordinary microscope.
普通光学显微镜200倍视野下计数毛细血管数量。
3
At the end of the study, the rats were killed, ACE activity in serum and lung homogenate was assayed, and the alveolar-capillary membrane was observed by transmission electron microscope.