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- At the bell stage, immunoreactive bFGF was localized to the preameloblasts. 钟状期牙胚中前成釉细胞为bFGF强阳性，星网层可疑；
- Objective: To study expression of whether Shh and its receptor Ptc during late bell stage in mouse tooth germ. 目的 :判断sonichedgehog(Shh)基因及其受体patched(Ptc)是否在小鼠牙胚钟状晚期有表达。 方法 :用RT PCR法研究Shh及其受体Ptc在小鼠牙胚钟状晚期的表达。
- Shh and its receptor are expressed during the late bell stage of mouse tooth germ. Shh及其受体Ptc在小鼠牙胚钟状晚期有表达。
- The expression was significant in the proliferating growth center of the bud ,the cap and earlier bell stage of tooth development. 在牙胚发育的蕾状期、帽状期、钟状早期的细胞增殖中心处三者表达都很明显。
- Results: The expression was significant in the proliferating growth center of the bud ,the cap and earlier bell stage of tooth development. 结果：在牙胚发育的蕾状期、帽状期、钟状早期的细胞增殖中心处三者表达都很明显。
- The proliferation stage,difference stage and mature stage of tooth of development of enamel organ in rat were similar to the bud stage,cap stage and bell stage of human being. 1大鼠切牙釉器发育的增殖期、分化期、成熟期分别与人牙的蕾状期、帽状期、钟状期相似。
- Method: bFGF expression was exmined with immmunohistochemical technique in bud stage,cap stage and bell stage of human tooth germ from aborted embryo of 7,8,10 and 14 weeks. 方法 :选择胎龄分别为 7、8、10、14周自愿终止妊娠的新鲜人胚胎各 4例 ,制作牙胚切片 ,将蕾状期、帽状期和钟状期牙胚切片 ,做免疫组化检测。
- Up to cap stage, bell stage and tooth tissue secretory stage, the expression of OPN was wider and more extensive than that of BSP. Especially during tooth tissue secretory stage, OPN was strongly positive in all tooth germ cells and bones. 在帽状期、钟状期及牙体硬组织(牙冠、牙根)分泌形成期,OPN的表达范围及强度高于BSP,尤其在牙体硬组织形成期,OPN在牙胚各类细胞及骨组织中均呈强阳性表达。
- In bell stage(E19),the positive staining was detected in both inner and outer enamel epithelium,but the inner was less than that of the outer and less positive staining was also found in the cells of stratum intermedium and stellate reticulum. 钟状期(胚胎19d),内、外釉上皮阳性表达,但内釉上皮较外釉上皮表达弱,中间层及星网状层细胞弱阳性表达;
- In the each stage of the cotton growth remnant of soil nitrate nitrogen was higher, but loss of apparent budget of soil nitrate was higher only in the seedling stage and the beginning of bell stage. 棉花生长发育的各个时期土壤硝态氮的残留都很高,但仅在苗期、初铃期表观损失较高。
- The church bell tolled the hour. 教堂的鸣钟报时。
- Results The expression of cadherins was prominent in the inner enamel epithelium in bud, cap and bell stages. 方法 采用免疫组织化学方法 ,观察钙粘附分子在牙胚发育的蕾状期、帽状期、钟状早期、钟状中期、钟状晚期的表达。
- It was expressed focally in the oral epithelium, dental lamina, outer enamel epithelium, stratum intermedium and stellate reticulum at cap and bell stages. 结果 :COX - 2在牙胚发育期间存在特异的时空分布模式 ,其阳性表达主要在牙胚发育帽状期、钟状期的口腔上皮、牙板上皮、外釉、中间层和星网状层。
- The positive cells of PCNA and PCD predominantly appeared at the prolife rating growth center in the bud, the cap and the earlier bell stages of tooth development. 在牙齿发育的蕾状期、帽状期、钟状期增殖及凋亡的阳性细胞均出现在细胞增殖生长中心处。
- Methods: PCD was detected by TdT-mediated dUTP nick end labelling (TUNEL) in different stages of tooth development of SD rat. Results: The TUNEL showed that there was consistent PCD present in the bud stage, cap stage and bell stage. 方法：采用原位末端标记法（TUNEL法）及HE染色技术，对纯系SD大鼠牙胚发育不同阶段的程序性细胞死亡现象进行观察。 结果：在牙齿发育的蕾状期、帽状期、钟状期均有程序性细胞死亡现象。
- The bell tower is the emblem of this city. 这座钟楼是这个城市的象征。
- There is a sonorous bell in the tower. 塔里有一口洪亮的钟。
- There are many spotlights on the stage. 舞台上有很多聚光灯。
- John bears the bell in all track events at school. 约翰在学校里的各个径赛项目中都赢得第一名。
- Marvin Bell is greatly valued as a good poet. 马文·贝尔被尊为一位优秀的诗人。
