A new spirostanol saponin presenting strong activity of inducing morphological deformation of Pyricularia oryzae mycelia was isolated from Dioscorea futshauensis R. Kunth by bioactivity-guided fractionation. The struc...A new spirostanol saponin presenting strong activity of inducing morphological deformation of Pyricularia oryzae mycelia was isolated from Dioscorea futshauensis R. Kunth by bioactivity-guided fractionation. The structure was established as (25S)-spirost-5-en-3 beta, 27-diol-3-O- [alpha -L-rhamnopyranosyl (1 -->2)-beta -D glucopyranosyl (1 -->3)]-beta -D-glucopyranoside on the basis of chemical evidences and spectral analysis, especially by 2D-NMR techniques.展开更多
A new β-resorcylic macrolide, 5＇-hydroxyzearalenol （1）, was isolated from the culture broth of a marine-derived fungus Fusarium sp. 05ABR26. Three known compounds, zearalenone （2）, 8＇-hydroxyzearalenone （3） a...A new β-resorcylic macrolide, 5＇-hydroxyzearalenol （1）, was isolated from the culture broth of a marine-derived fungus Fusarium sp. 05ABR26. Three known compounds, zearalenone （2）, 8＇-hydroxyzearalenone （3） and zearalenol （4） were also isolated. The structure and relative stereochemistry of 1 were elucidated on the basis of spectroscopic data and single-crystal X-ray diffraction data. Compound 2 displayed potent inhibitory activity against Pyricularia oryzae with a MIC value of 6.25 μg/mL, while compound 3 was much less active; however, 1 and 4 showed no obvious activity.展开更多
Carbon and nitrogen species-involved TiO2 （CN-TiO2） were systematically synthesized by thermal condensa- tion of cyanuric acid on the TiO2 surface. And the photocatalytic reactions for H2 production from sacrificial...Carbon and nitrogen species-involved TiO2 （CN-TiO2） were systematically synthesized by thermal condensa- tion of cyanuric acid on the TiO2 surface. And the photocatalytic reactions for H2 production from sacrificial aque- ous solutions were performed on several CN-TiO2 photocatalyst under visible-light irradiation. The photocatalytic activity of the CN-TiO2 was influenced by total amounts of carbon and nitrogen species, and the preferable activity was ten times higher than that of pristine carbon nitride. Here, the states of the CN-TiO2 photocatalyst were charac- terized by XPS, FT-IR and UV-Vis spectroscopy as well as DFT calculations. The photo-electrochemical measure- ments confirmed that the enhancement of H2 production is associated with effective charge separation under photo- excitation of highly dispersed carbon nitride on the TiO2 surface.展开更多
基金supported by the National Natural Science Foundation of China (21703050, 21271153, 21373181)China Postdoctoral Science Foun‐dation (512200‐X91701)Special Research Foundation of Young Teachers in Hangzhou Dianzi University (ZX150204307002/032)~~
基金supported by National Natural Science Foundation of China(21271153,21373181,21222307,U1402233)Major Research Plan of National Natural Science Foundation of China(91545113)the Fundamental Research Funds for the Central Universities(2014XZZX003-02)~~
基金was supported by the National Natural Science Foundation of China(91545113,21703050)the China Postdoctoral Science Foundation(2017M610363,2018T110584)+2 种基金Shell Global Solutions International B.V.(PT71423,PT74557)the Fok Ying Tong Education Foundation(131015)the Science&Technology Program of Ningbo(2017C50014)~~
文摘A new spirostanol saponin presenting strong activity of inducing morphological deformation of Pyricularia oryzae mycelia was isolated from Dioscorea futshauensis R. Kunth by bioactivity-guided fractionation. The structure was established as (25S)-spirost-5-en-3 beta, 27-diol-3-O- [alpha -L-rhamnopyranosyl (1 -->2)-beta -D glucopyranosyl (1 -->3)]-beta -D-glucopyranoside on the basis of chemical evidences and spectral analysis, especially by 2D-NMR techniques.
基金the National Natural Science Foundation(No.30371680)of the People's Republic of China.
文摘A new β-resorcylic macrolide, 5＇-hydroxyzearalenol （1）, was isolated from the culture broth of a marine-derived fungus Fusarium sp. 05ABR26. Three known compounds, zearalenone （2）, 8＇-hydroxyzearalenone （3） and zearalenol （4） were also isolated. The structure and relative stereochemistry of 1 were elucidated on the basis of spectroscopic data and single-crystal X-ray diffraction data. Compound 2 displayed potent inhibitory activity against Pyricularia oryzae with a MIC value of 6.25 μg/mL, while compound 3 was much less active; however, 1 and 4 showed no obvious activity.
文摘Carbon and nitrogen species-involved TiO2 （CN-TiO2） were systematically synthesized by thermal condensa- tion of cyanuric acid on the TiO2 surface. And the photocatalytic reactions for H2 production from sacrificial aque- ous solutions were performed on several CN-TiO2 photocatalyst under visible-light irradiation. The photocatalytic activity of the CN-TiO2 was influenced by total amounts of carbon and nitrogen species, and the preferable activity was ten times higher than that of pristine carbon nitride. Here, the states of the CN-TiO2 photocatalyst were charac- terized by XPS, FT-IR and UV-Vis spectroscopy as well as DFT calculations. The photo-electrochemical measure- ments confirmed that the enhancement of H2 production is associated with effective charge separation under photo- excitation of highly dispersed carbon nitride on the TiO2 surface.
