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检测孕妇血浆中的urocortin 被引量:2
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作者 顾清 Vicki Clifton +6 位作者 崔英 惠宁 周晓宁 贺茜 韩青凤 沙金燕 roger smith 《第二军医大学学报》 CAS CSCD 北大核心 2000年第12期1155-1157,共3页
目的 :研究 urocortin(促肾上腺皮质激素释放激素肽类家族新成员 )是否存在于孕妇血循环中及其含量 ,以证实 uro-cortin是否能在妊娠中产生并由此调节子宫 -胎盘的血管张力。 方法 :用放射免疫测定法从受孕 16周起检测孕妇血浆中是否含... 目的 :研究 urocortin(促肾上腺皮质激素释放激素肽类家族新成员 )是否存在于孕妇血循环中及其含量 ,以证实 uro-cortin是否能在妊娠中产生并由此调节子宫 -胎盘的血管张力。 方法 :用放射免疫测定法从受孕 16周起检测孕妇血浆中是否含有 urocortin,并用凝胶层析法检测从孕妇血浆中提取的 urocortin是否与人工合成的 urocortin标准品一致。 结果 :从受孕16周起孕妇的血浆中即可测得 urocortin,但其浓度并不随孕周的增加而改变。孕妇血浆中的 urocortin与人工合成的标准品具有相同的相对分子质量和免疫活性。 结论 :实验证实在人类妊娠过程中 ,urocortin可从孕妇血浆中检测出 ,为 urocortin调节子宫 展开更多
关键词 UROCORTIN 孕妇 子宫-胎盘 血管张力 检测
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British Clocks in Eighteenth-Century China:Presents,Tribute,or Trade?
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作者 roger smith 《Chinese Annals of History of Science and Technology》 2020年第S01期26-38,共13页
It is commonly believed that most European clocks that reached China before the nineteenth century were sent to the emperor as diplomatic presents from European rulers,or were given to Chinese officials by European me... It is commonly believed that most European clocks that reached China before the nineteenth century were sent to the emperor as diplomatic presents from European rulers,or were given to Chinese officials by European merchants in attempts to improve trading conditions.Although such presents had been given in earlier times,British records show that,by the eighteenth century when the export of clocks to China reached its height,most clocks,including the finest,reached China as private trade goods.Once in Canton(Guangzhou),the best clocks were bought by local Chinese officials for inclusion in their annual tribute to the emperor and senior members of the government in Beijing,where many of these clocks survive in the former imperial collection. 展开更多
关键词 BRITAIN China eighteenth century TRADE clocks PRESENTS TRIBUTE Emperor Qianlong Macartney Embassy
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