由于甲醛介导的DNA损伤和石蜡对DNA提取的阻碍作用，使得常规DNA提取方法很难从福尔马林固定石蜡包埋组织（FFPET）中获取高质量的DNA。
Owing to the DNA degradation induced by formalin and the obstruction of paraffin to DNA extraction, it is difficult to recover high-quality DNA from Formalin fixed and paraffin embedded tissue(FFPET).
并取肝左叶于10％中性甲醛溶液中固定，石蜡包埋，作组织形态学观察。
Left lobe of liver was fixed in 10% formaldehyde, than embedelinged in paraffin, at last observed histological change with optical microscope.
大脑组织形态学观察：大鼠脑组织用甲醛固定24小时，石蜡包埋，制作病理切片，HE染色。
Observation of brain tissues morphology: Rats brain tissue with formaldehyde 24 hours, embedded in paraffin, making pathological section, HE stain.
大脑组织形态学观察：大鼠脑组织用甲醛固定24小时，石蜡包埋，制作病理切片，HE染色。
Observation of brain tissues morphology: Rats brain tissue with formaldehyde 24 hours, embedded in paraffin, making pathological section, HE stain.
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