To study the distribution and developmental regularities of Substance P (SP) and Calcitonin Gene-Related Peptide (CGRP) - IR peptidergic nerves in fetus small intestine. ?
研究人胎儿小肠壁P物质（SP）和降钙素基因相关肽（CGRP）-IR肽能神经的分布和发育规律。
Methods Colorate the slice of the rat dental pulp by the immunohistochemical methods. Observe the distribution of SP-IR and CGRP-IR nerve fibers by microscope.
方法：利用免疫组织化学方法对大鼠牙髓组织切片进行染色，在显微镜下观察SP和CGRP免疫阳性神经纤维的分布。
The distribution of VIP and SP immunoreactive (VIP IR and SP IR) nerve fibers in human duodenum was studied by using immunohistochemical ABC method.
本文采用免疫组织化学ABC法研究血管活性肠肽（VIP） 能神经和P物质（SP） 能神经在人十二指肠壁内的分布。
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