Single mature Retzius cells which contain 5-HT have been implanted in isolated ganglia of Whitmania pigra. The properties of the implanted Retzius cell and its connections with the original identified nerve cells of t...Single mature Retzius cells which contain 5-HT have been implanted in isolated ganglia of Whitmania pigra. The properties of the implanted Retzius cell and its connections with the original identified nerve cells of the ganglia have been measured by intracellular microelectrodes. At 3 days in culture an implanted Retzius cell maintains its normal electrical membrane properties. It also forms the non-rectifying electronic coupling with the original Retzius cell and rectifying junctions with the L motor neuron of the host ganglion. In addition it receives chemical inputs of the impulse from T and N sensory neurons of ganglion. Impulses in the implanted Retzius cell evoke synaptic potentials in the L motor neuron, In this paper the appearance of novel synapses, which are formed by implanting an extra mature neuron as a pre- or post-synaptic element, is described. It might represent functional development of central nervous system at an earlier stage.展开更多
利用欧洲中期天气预报中心(European Center for Medium-Range Weather Forecasts)近10年的ERA5再分析海浪场数据,为中国南海周边4个省(自治区)的国家级海洋牧场选取最适合开发波浪能资源的电站位置,重点研究各站点的波浪能开发潜力以...利用欧洲中期天气预报中心(European Center for Medium-Range Weather Forecasts)近10年的ERA5再分析海浪场数据,为中国南海周边4个省(自治区)的国家级海洋牧场选取最适合开发波浪能资源的电站位置,重点研究各站点的波浪能开发潜力以及与波浪能装置布放方向有关的指标。研究表明:广东省惠州小星山以及福建省莆田市南日岛两个国家级海洋牧场所选站点的波浪能开发潜力最高,获得高经济收益的潜力也最强;此外,后者所选站点的波浪能传播方向最集中,最有利于装置吸收波浪能资源。展开更多
目的检索并再评价声音对NICU早产儿生长发育影响的系统评价,为临床医务人员临床决策及早产儿健康干预策略的持续改进提供参考。方法计算机检索The Cochrane Library、Embase、PubMed、Web of Science、万方、中国知网、维普和中国生物...目的检索并再评价声音对NICU早产儿生长发育影响的系统评价,为临床医务人员临床决策及早产儿健康干预策略的持续改进提供参考。方法计算机检索The Cochrane Library、Embase、PubMed、Web of Science、万方、中国知网、维普和中国生物医学文献数据库,检索关于声音对NICU早产儿影响的系统评价/Meta分析/荟萃分析,检索时间为建库至2023年5月。2名研究人员应用AMSTAR对文献进行方法学质量评价后,通过GRADE进行证据整理与分级。结果初检文献405篇,最终纳入文献20篇,AMSTAR质量评价结果表明,高等质量文献有5篇,其余15篇均为中等质量,纳入文献的总体方法学质量较低。采用GRADE系统对20篇系统评价的79条结局指标的证据质量评价结果显示,12条证据为中等质量,34条证据为低等质量,33条证据为极低质量。结论声音干预有利于改善NICU早产儿的相关生理指标、睡眠效率、行为状态、神经行为及大脑发育,可促进早产儿健康恢复,但系统评价的方法学质量和证据的质量均较低,临床实践需谨慎采纳有关证据,并逐步进行更加规范、严谨的研究。展开更多
基金Project supported by the National Natural Science Foundation of China
文摘Single mature Retzius cells which contain 5-HT have been implanted in isolated ganglia of Whitmania pigra. The properties of the implanted Retzius cell and its connections with the original identified nerve cells of the ganglia have been measured by intracellular microelectrodes. At 3 days in culture an implanted Retzius cell maintains its normal electrical membrane properties. It also forms the non-rectifying electronic coupling with the original Retzius cell and rectifying junctions with the L motor neuron of the host ganglion. In addition it receives chemical inputs of the impulse from T and N sensory neurons of ganglion. Impulses in the implanted Retzius cell evoke synaptic potentials in the L motor neuron, In this paper the appearance of novel synapses, which are formed by implanting an extra mature neuron as a pre- or post-synaptic element, is described. It might represent functional development of central nervous system at an earlier stage.
文摘利用欧洲中期天气预报中心(European Center for Medium-Range Weather Forecasts)近10年的ERA5再分析海浪场数据,为中国南海周边4个省(自治区)的国家级海洋牧场选取最适合开发波浪能资源的电站位置,重点研究各站点的波浪能开发潜力以及与波浪能装置布放方向有关的指标。研究表明:广东省惠州小星山以及福建省莆田市南日岛两个国家级海洋牧场所选站点的波浪能开发潜力最高,获得高经济收益的潜力也最强;此外,后者所选站点的波浪能传播方向最集中,最有利于装置吸收波浪能资源。
文摘目的检索并再评价声音对NICU早产儿生长发育影响的系统评价,为临床医务人员临床决策及早产儿健康干预策略的持续改进提供参考。方法计算机检索The Cochrane Library、Embase、PubMed、Web of Science、万方、中国知网、维普和中国生物医学文献数据库,检索关于声音对NICU早产儿影响的系统评价/Meta分析/荟萃分析,检索时间为建库至2023年5月。2名研究人员应用AMSTAR对文献进行方法学质量评价后,通过GRADE进行证据整理与分级。结果初检文献405篇,最终纳入文献20篇,AMSTAR质量评价结果表明,高等质量文献有5篇,其余15篇均为中等质量,纳入文献的总体方法学质量较低。采用GRADE系统对20篇系统评价的79条结局指标的证据质量评价结果显示,12条证据为中等质量,34条证据为低等质量,33条证据为极低质量。结论声音干预有利于改善NICU早产儿的相关生理指标、睡眠效率、行为状态、神经行为及大脑发育,可促进早产儿健康恢复,但系统评价的方法学质量和证据的质量均较低,临床实践需谨慎采纳有关证据,并逐步进行更加规范、严谨的研究。
