METHODS The guinea pigs were killed 14 days after exposure to experimental BUP. Their basilar membranes were stained by silver nitrate and the hair cell injuries were quantitatively assessed using the light microscope.

• 方法将豚鼠暴露实验性BUP14天后处死,硝酸银染色硬铺片法计数观察耳蜗基底膜毛细胞损伤情况。