Two new compounds,schinifolin Ⅰ and acetoxyschinifolin Ⅱ,along with five known compounds(auraptenⅢ,dictamnine Ⅳ,scoparone Ⅴ,skimmianine Ⅵ,and β-sitosterol Ⅶ)were isolated from the roots of Zanthoxylum schinifo...Two new compounds,schinifolin Ⅰ and acetoxyschinifolin Ⅱ,along with five known compounds(auraptenⅢ,dictamnine Ⅳ,scoparone Ⅴ,skimmianine Ⅵ,and β-sitosterol Ⅶ)were isolated from the roots of Zanthoxylum schinifolium Sieb.et Zucc.col- lected in Yixing County,Jiangsu Province.The structure determination was based upon spectroscopic analysis(UV,IR,MS,PMR,CMR,2D NMR).The structures of schinifolin Ⅰ and acetoxyschinifolin Ⅱ were elucidated as 7[(3′,7′-dimethyl-2′,6′-octadienyl)] oxy-8-methoxy-2H-1-benzopyran-2-one,and 7[(3′,7′-dimethyl-5′-acetoxy-2′, 6′-octadienyl)]oxy-8-methoxy-2H-1-benzopyran-2-one,respectively. In the test of platelet aggregation caused by PAF,compounds Ⅰ,Ⅱ,Ⅲ and Ⅴ showed inhibitory activity.展开更多
Zhejiang Stage Design Institute Ltd. Co. developed a multi-functional lighting control system specially for regulating environmental lighting.The article illustrates the technical features of the system including dist...Zhejiang Stage Design Institute Ltd. Co. developed a multi-functional lighting control system specially for regulating environmental lighting.The article illustrates the technical features of the system including distribution control, networking structure, standard protocol, intelligent protection,intelligent soft start and professional lighting monitoring software.It can be applied in hotels,buildings, theme parks and conference halls etc.展开更多
The article analysesthe advantages of the characters display screen,compared with slide projector. And it introducesfive kinds of display screen whichfit in with dlifferent needs of the theatres. At the end of the art...The article analysesthe advantages of the characters display screen,compared with slide projector. And it introducesfive kinds of display screen whichfit in with dlifferent needs of the theatres. At the end of the article, it predicts the bright future of this展开更多
文摘Two new compounds,schinifolin Ⅰ and acetoxyschinifolin Ⅱ,along with five known compounds(auraptenⅢ,dictamnine Ⅳ,scoparone Ⅴ,skimmianine Ⅵ,and β-sitosterol Ⅶ)were isolated from the roots of Zanthoxylum schinifolium Sieb.et Zucc.col- lected in Yixing County,Jiangsu Province.The structure determination was based upon spectroscopic analysis(UV,IR,MS,PMR,CMR,2D NMR).The structures of schinifolin Ⅰ and acetoxyschinifolin Ⅱ were elucidated as 7[(3′,7′-dimethyl-2′,6′-octadienyl)] oxy-8-methoxy-2H-1-benzopyran-2-one,and 7[(3′,7′-dimethyl-5′-acetoxy-2′, 6′-octadienyl)]oxy-8-methoxy-2H-1-benzopyran-2-one,respectively. In the test of platelet aggregation caused by PAF,compounds Ⅰ,Ⅱ,Ⅲ and Ⅴ showed inhibitory activity.
文摘Zhejiang Stage Design Institute Ltd. Co. developed a multi-functional lighting control system specially for regulating environmental lighting.The article illustrates the technical features of the system including distribution control, networking structure, standard protocol, intelligent protection,intelligent soft start and professional lighting monitoring software.It can be applied in hotels,buildings, theme parks and conference halls etc.
文摘The article analysesthe advantages of the characters display screen,compared with slide projector. And it introducesfive kinds of display screen whichfit in with dlifferent needs of the theatres. At the end of the article, it predicts the bright future of this