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Quanjun Yang,Xiaolan Cui,Bin Wu,Yujing Shi,Xiaowei Du,Mingsong Fan,Zhaolin Sun,Chenggang Huang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.1
Bioassay-guided fractionation of extracts from Fructus Gardeniae led to analysis of its bioactive natural products. After infection by influenza virus strain A/FM/1/47-MA in vivo,antiviral activity of the extracts were investigated. The target fraction was orally administered to rats and blood was collected. High-performance liquid chromatography coupled with photo diode array detector and electrospray ion trap multiple-stage tandem mass spectrometry was applied to screen the compounds absorbed into the blood. A structural characterization based on the retention time, ultraviolet spectra, parent ions and fragmentation ions was performed. Thirteen compounds were confirmed or tentatively identified. This provides an accurate profile of the composition of bioactive compounds responsible for the anti-influenza properties.
Deep removal of sulfur from real diesel by catalytic oxidation with halogen-free ionic liquid
Dan Liu,Jianzhou Gui,Yong-Ki Park,Shuang Yang,Yuhuan Gao,Xilai Peng,Zhaolin Sun 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.1
A halogen-free task-specific ionic liquid (TSIL) of 1-(2-carboxylic acid) ethyl-3-methylimidazolium bisulfate ([(CH2)2COOHmim] [HSO4]) is applied for deep oxidative desulfurization of real diesel as a catalyst and reaction media. The sulfur level of real diesel can be reduced from 200 to 20.5 μg/g at room temperature with small amount of ionic liquid using H2O2 as an oxidant. The used ionic liquid can be easily recycled and no obvious decrease in catalytic activity can be found after recycling five times.