The liver pathological tissues were chosen under the electron microscope to observe the change of liver caryon and its mitochondrial area , mitochondrial density , fat drop area .

取肝脏病理组织进行检查，电镜下观察肝细胞核及其线粒体面积、密度，脂肪滴面积的变化情况。

Nucleolar organizer regions ( NORs ) are DNA cycles in the caryon , which are closely related with the nucleolar formation and change . Silver nitrate straining could specifically show that there were NORs of rRNA genes in the caryons .

核仁组成区（NORs）是细胞核中的DNA环，与核仁的形成及变化密切相关，硝酸银染色能特异地显示细胞核内含有rRNA基因的NORs。