“Earth summit mission 2022”is one of the landmark scientific research activities of the Second Tibetan Plateau Scientific Expedition and Research(STEP).This scientific expedition firstly used advanced technology and...“Earth summit mission 2022”is one of the landmark scientific research activities of the Second Tibetan Plateau Scientific Expedition and Research(STEP).This scientific expedition firstly used advanced technology and methods to detect vertical meteorological elements and produce forecasts for mountain climbing.The“Earth summit mission 2022”Qomolangma scientific expedition exceeded an altitude of over 8000 meters for the first time and carried out a comprehensive scientific investigation mission on the summit of Mt.Qomolangma.Among the participants,the westerly–monsoon synergy and influence team stationed in the Mt.Qomolangma region had two tasks:1)detecting the vertical structure of the atmosphere for parameters such as wind,temperature,humidity,and pressure with advanced instruments for high-altitude detection at the Mt.Qomolangma base camp;and 2)observing extreme weather processes to ensure that members of the mountaineering team could successfully reach the top.Through this scientific expedition,a better understanding of the vertical structure and weather characteristics of the complex area of Mt.Qomolangma is gained.展开更多
Product selectivity and reaction pathway are highly dependent on surface structure of heterogeneous catalysts.For vapor-phase hydrogenation of dimethyl oxalate(DMO),"EG route"(DMO→methyl glycolate(MG)ethyle...Product selectivity and reaction pathway are highly dependent on surface structure of heterogeneous catalysts.For vapor-phase hydrogenation of dimethyl oxalate(DMO),"EG route"(DMO→methyl glycolate(MG)ethylene glycol(EG)→ethanol(ET))and"MA route"(DMO→MG→methyl acetate(MA))were proposed over traditional Cu based catalysts and Mo-based or Fe-based catalysts,respectively.Herein,tunable yield of ET(93.7%)and MA(72.1%)were obtained through different reaction routes over WO_(x) modified Cu/SiO_(2) catalysts,and the corresponding reaction route was further proved by kinetic study and in-situ DRIFTS technology.Mechanistic studies demonstrated that H_(2) activation ability,acid density and Cu-WO_(x) interaction on the catalysts were tuned by regulating the surface W density,which resulted in the different reaction pathway and product selectivity.What's more,high yield of MA produced from DMO hydrogenation was firstly reported with the H_(2) pressure as low as 0.5 MPa.展开更多
目的:数据挖掘《藏药方剂宝库》中治疗隆病的方剂规律。方法:通过《藏药方剂宝库》中收集与整理用于治疗隆病的方剂,使用Excel 2021建立方剂数据库,R Version 4.1.2软件对数据进行频次分析、六味分析、三化味分析、五源分析、十七效能...目的:数据挖掘《藏药方剂宝库》中治疗隆病的方剂规律。方法:通过《藏药方剂宝库》中收集与整理用于治疗隆病的方剂,使用Excel 2021建立方剂数据库,R Version 4.1.2软件对数据进行频次分析、六味分析、三化味分析、五源分析、十七效能分析、关联规则分析。结果:136首隆病方剂中,共涉及292味藏药。治疗频次最高的前4位为肉豆蔻、丁香、毕菝、阿魏。药味中以甘味和辛味为主,化味中以甘化味和苦化味为主。源中空源和风源最多。效能主要为轻效能、重效能、糙效能、热效能。功效主治隆病、培根病、寒病、热病。关联规则中丁香+肉豆蔻的支持度和频次最高。结论:藏医应用隆病方剂以治疗隆病为主,总结出藏医治疗隆病的用药规律。展开更多
基金funded by the Second Tibetan Plateau Scientific Expedition and Research Program(STEP)(Grant No.2019QZKK0103)the Strategic Priority Research Program of Chinese Academy of Sciences(XDA20060101)the National Natural Science Foundation of China(Grant Nos.91837208,41830650).
文摘“Earth summit mission 2022”is one of the landmark scientific research activities of the Second Tibetan Plateau Scientific Expedition and Research(STEP).This scientific expedition firstly used advanced technology and methods to detect vertical meteorological elements and produce forecasts for mountain climbing.The“Earth summit mission 2022”Qomolangma scientific expedition exceeded an altitude of over 8000 meters for the first time and carried out a comprehensive scientific investigation mission on the summit of Mt.Qomolangma.Among the participants,the westerly–monsoon synergy and influence team stationed in the Mt.Qomolangma region had two tasks:1)detecting the vertical structure of the atmosphere for parameters such as wind,temperature,humidity,and pressure with advanced instruments for high-altitude detection at the Mt.Qomolangma base camp;and 2)observing extreme weather processes to ensure that members of the mountaineering team could successfully reach the top.Through this scientific expedition,a better understanding of the vertical structure and weather characteristics of the complex area of Mt.Qomolangma is gained.
基金supported by National Natural Science Foundation of China (No.22102147 and 22002151)State Key Laboratory of Chemical Engineering (No.SKL-ChE-22A02)+2 种基金Zhejiang Provincial Natural Science Foundation of China under Grant No.LQ21B030009the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA29050300)Qinchuang Yuan high-level innovation and entrepreneurship talents implementing project (No.QCYRCXM-2022-177)。
文摘Product selectivity and reaction pathway are highly dependent on surface structure of heterogeneous catalysts.For vapor-phase hydrogenation of dimethyl oxalate(DMO),"EG route"(DMO→methyl glycolate(MG)ethylene glycol(EG)→ethanol(ET))and"MA route"(DMO→MG→methyl acetate(MA))were proposed over traditional Cu based catalysts and Mo-based or Fe-based catalysts,respectively.Herein,tunable yield of ET(93.7%)and MA(72.1%)were obtained through different reaction routes over WO_(x) modified Cu/SiO_(2) catalysts,and the corresponding reaction route was further proved by kinetic study and in-situ DRIFTS technology.Mechanistic studies demonstrated that H_(2) activation ability,acid density and Cu-WO_(x) interaction on the catalysts were tuned by regulating the surface W density,which resulted in the different reaction pathway and product selectivity.What's more,high yield of MA produced from DMO hydrogenation was firstly reported with the H_(2) pressure as low as 0.5 MPa.
文摘目的:数据挖掘《藏药方剂宝库》中治疗隆病的方剂规律。方法:通过《藏药方剂宝库》中收集与整理用于治疗隆病的方剂,使用Excel 2021建立方剂数据库,R Version 4.1.2软件对数据进行频次分析、六味分析、三化味分析、五源分析、十七效能分析、关联规则分析。结果:136首隆病方剂中,共涉及292味藏药。治疗频次最高的前4位为肉豆蔻、丁香、毕菝、阿魏。药味中以甘味和辛味为主,化味中以甘化味和苦化味为主。源中空源和风源最多。效能主要为轻效能、重效能、糙效能、热效能。功效主治隆病、培根病、寒病、热病。关联规则中丁香+肉豆蔻的支持度和频次最高。结论:藏医应用隆病方剂以治疗隆病为主,总结出藏医治疗隆病的用药规律。
