用IFUS(Induction Field Up-shift Method)方法生长了浓度高,光学质量好的Ti:Al_2O_3单晶,通过测量Ti^(3+)离子的吸收,激发,荧光光谱以及荧光寿命,分析研究了Ti:Al_2O_3单晶的发光特性和发光谱随温度的变化,(τFluo=3.1μs,300K;β=[Ti^...用IFUS(Induction Field Up-shift Method)方法生长了浓度高,光学质量好的Ti:Al_2O_3单晶,通过测量Ti^(3+)离子的吸收,激发,荧光光谱以及荧光寿命,分析研究了Ti:Al_2O_3单晶的发光特性和发光谱随温度的变化,(τFluo=3.1μs,300K;β=[Ti^(3+)]/[Ti]=0.999,αm/αr=380,α488nm=9.5cm^(-1)。展开更多
TongMai Granules is a Chinese medicine patent drug to treat cardiovascular diseases.It is prepared from the water extract of Dan-shen,Chuan-xiong and Ge-gen.The main compounds of TongMai Granules are isoflavone glycos...TongMai Granules is a Chinese medicine patent drug to treat cardiovascular diseases.It is prepared from the water extract of Dan-shen,Chuan-xiong and Ge-gen.The main compounds of TongMai Granules are isoflavone glycosides,isoflavones,and phenolic acids.However,it is difficult to detect low-polar compounds such as tanshinones and phthalides though they may also contribute to the therapeutic effect.In this work,an off-line two-dimensional chromatography method was developed to enrich the minor constituents in TongMai Granules.The extract was subjected to an SEP-PAK silica SPE column and eluted with petroleum ether,ethyl acetate–methanol(6:1,v/v),and methanol,successively.The three fractions were then analyzed using ultra-high performance liquid chromatography coupled with orbitrap mass spectrometry(UHPLC/orbitrap-MS).The isoflavones from Ge-gen,phenolic acids from Dan-shen and phthalides from Chuan-xiong were distributed in different fractions.A total of 131 compounds,including 59 from Ge-gen,26 from Dan-shen,43 from Chuan-xiong,and 3 common ones from Dan-shen and Chuan-xiong were tentatively identified.Among them,26 compounds were identified by comparing with reference standards.This study set a good example for comprehensive analysis of the constituents in traditional Chinese medicine formula.展开更多
文摘用IFUS(Induction Field Up-shift Method)方法生长了浓度高,光学质量好的Ti:Al_2O_3单晶,通过测量Ti^(3+)离子的吸收,激发,荧光光谱以及荧光寿命,分析研究了Ti:Al_2O_3单晶的发光特性和发光谱随温度的变化,(τFluo=3.1μs,300K;β=[Ti^(3+)]/[Ti]=0.999,αm/αr=380,α488nm=9.5cm^(-1)。
基金National Key Research and Development Program of China(Grant No.2018YFC1707301,2018YFC1707304)。
文摘TongMai Granules is a Chinese medicine patent drug to treat cardiovascular diseases.It is prepared from the water extract of Dan-shen,Chuan-xiong and Ge-gen.The main compounds of TongMai Granules are isoflavone glycosides,isoflavones,and phenolic acids.However,it is difficult to detect low-polar compounds such as tanshinones and phthalides though they may also contribute to the therapeutic effect.In this work,an off-line two-dimensional chromatography method was developed to enrich the minor constituents in TongMai Granules.The extract was subjected to an SEP-PAK silica SPE column and eluted with petroleum ether,ethyl acetate–methanol(6:1,v/v),and methanol,successively.The three fractions were then analyzed using ultra-high performance liquid chromatography coupled with orbitrap mass spectrometry(UHPLC/orbitrap-MS).The isoflavones from Ge-gen,phenolic acids from Dan-shen and phthalides from Chuan-xiong were distributed in different fractions.A total of 131 compounds,including 59 from Ge-gen,26 from Dan-shen,43 from Chuan-xiong,and 3 common ones from Dan-shen and Chuan-xiong were tentatively identified.Among them,26 compounds were identified by comparing with reference standards.This study set a good example for comprehensive analysis of the constituents in traditional Chinese medicine formula.
