Objective: to study the effects of longtime selenium (se) and iodine (I) deficiency on histomorphology and PCNA expression of thyroid gland of rat at development stage.
目的：研究长期低硒、低碘饲料喂养对子代发育期大鼠甲状腺组织形态结构以及PCNA表达的影响。
Objective To study the expression of (proliferating cell nuclear antigen, PCNA) and the changes of pathology in brain after rehabilitation training on infarcted rats.
目的研究实验性脑梗死大鼠康复训练后脑的增殖细胞核抗原（PCNA ）的表达及病理学改变。
AIM To detect proliferating cell nuclear antigen PCNA positive expression in suture cells around maxilla and explore the improvement of suture expansion on the growth and development of maxilla.
目的：检测环上颌骨骨缝区增殖细胞核抗原阳性表达，探讨缝牵张促进上颌骨生长发育的作用。
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