High-pressure structural search was performed on the hydrogen-rich compound LuBeH8at pressures up to 200 GPa.We found an Fm3m structure that exhibits stability and superconductivity above 100 GPa.Our phonon dispersion...High-pressure structural search was performed on the hydrogen-rich compound LuBeH8at pressures up to 200 GPa.We found an Fm3m structure that exhibits stability and superconductivity above 100 GPa.Our phonon dispersion,electronic band structure,and superconductivity analyses in the 100–200 GPa pressure range reveal a strong electron–phonon coupling in Lu Be H8,while the superconducting critical temperature Tcshows a decreasing trend as the pressure increases,with T_(c)=255 K at 200 GPa and maximal T_(c)=355 K at 100 GPa.This study demonstrated the room-temperature superconductivity in Fm3m thus enriching the family of ternary hydrides.These findings provide valuable guidance for identifying new high-temperature superconducting hydrides.展开更多
细辛Asari Radix et Rhizoma首载于《神农本草经》,具有解表散寒、祛风止痛、通窍、温肺化饮的功效,主要化学成分包括木脂素类、挥发油类、酸类、苷类、含氮化合物等。现代药理学研究表明,细辛具有抗炎镇痛、止咳平喘、抗菌、抗病毒等...细辛Asari Radix et Rhizoma首载于《神农本草经》,具有解表散寒、祛风止痛、通窍、温肺化饮的功效,主要化学成分包括木脂素类、挥发油类、酸类、苷类、含氮化合物等。现代药理学研究表明,细辛具有抗炎镇痛、止咳平喘、抗菌、抗病毒等多种药理作用。通过对近10年细辛的化学成分、药理作用、临床应用和安全性进行综述,从植物亲缘、药效、药性、配伍、化学成分可测性等方面预测分析细辛质量标志物(quality marker,Q-Marker),初步预测细辛脂素、芝麻脂素、甲基丁香酚、β-细辛醚、阿魏酸、十二碳四烯酰胺A和十二碳四烯酰胺B等可作为其Q-Marker,为建立和完善细辛质量评价体系提供参考。展开更多
基金supported by the National Key R&D Program of China(Grant No.2018YFA0704300)the National Natural Science Foundation of China(Grant No.U1932217)the StartUp Fund of Nanjing University of Posts and Telecommunications(Grant Nos.NY219087 and NY220038)。
文摘High-pressure structural search was performed on the hydrogen-rich compound LuBeH8at pressures up to 200 GPa.We found an Fm3m structure that exhibits stability and superconductivity above 100 GPa.Our phonon dispersion,electronic band structure,and superconductivity analyses in the 100–200 GPa pressure range reveal a strong electron–phonon coupling in Lu Be H8,while the superconducting critical temperature Tcshows a decreasing trend as the pressure increases,with T_(c)=255 K at 200 GPa and maximal T_(c)=355 K at 100 GPa.This study demonstrated the room-temperature superconductivity in Fm3m thus enriching the family of ternary hydrides.These findings provide valuable guidance for identifying new high-temperature superconducting hydrides.
文摘细辛Asari Radix et Rhizoma首载于《神农本草经》,具有解表散寒、祛风止痛、通窍、温肺化饮的功效,主要化学成分包括木脂素类、挥发油类、酸类、苷类、含氮化合物等。现代药理学研究表明,细辛具有抗炎镇痛、止咳平喘、抗菌、抗病毒等多种药理作用。通过对近10年细辛的化学成分、药理作用、临床应用和安全性进行综述,从植物亲缘、药效、药性、配伍、化学成分可测性等方面预测分析细辛质量标志物(quality marker,Q-Marker),初步预测细辛脂素、芝麻脂素、甲基丁香酚、β-细辛醚、阿魏酸、十二碳四烯酰胺A和十二碳四烯酰胺B等可作为其Q-Marker,为建立和完善细辛质量评价体系提供参考。
