When evaluating ionic liquids （ILs） for extractive desulfurization （EDS） of fuel oils, the inevitable presence of water in the system may have a significant and in many cases strongly negative effect. However, few...When evaluating ionic liquids （ILs） for extractive desulfurization （EDS） of fuel oils, the inevitable presence of water in the system may have a significant and in many cases strongly negative effect. However, few studies have considered this particular issue and a promoted water effect on EDS is scarcely reported. In this work, COSMO-RS was firstly employed to calculate the capacity and selectivity for EDS of various IL/H20 mixtures, which cover different IL characters and a wide water concentration range. Experiments were then conducted with a representative IL [C4MIM]IH2P04], whose stable and even promoted extraction performance with a small amount of water was suggested by COSMO-RS. Through analyses of the desulfurization ratio, the cross- solubility and the water content in the desulfurized fuel, the promoted effect of water within a certain range （〈 10 wt%） was experimentally demonstrated. Moreover, such effect of water was explained combining the viscosity, the solvent-solute interactions and the COSMO-RS based analysis.展开更多
In the present work we investigated, for the first time, the anti-inflammatory activity and the antioxidant properties of aqueous and ethanolic extracts, obtained from stem bark of Geoffroea decorticans （Gill. ex Hoo...In the present work we investigated, for the first time, the anti-inflammatory activity and the antioxidant properties of aqueous and ethanolic extracts, obtained from stem bark of Geoffroea decorticans （Gill. ex Hook. et Am.） Burk. （Fabaceae）. G. decorticans, commonly known as ＂chafiar＂ or ＂chafiarcillo＂, is a traditional argentinean plant used as emollient, balsamic, antitussive, expectorant and anti-inflammatory. The stem bark was collected from San Francisco del Monte de Oro, San Luis, Argentina. Anti-inflammatory activity was evaluated by carrageenan-induced paw edema in rats. Antioxidant activity was tested using 1,1-Diphenyl-2-picrylhydrazyl radical-scavenging activity （DPPH）, 2,2＂-Azino-bis（3-ethylbenzthiazoline-6-sulphonic acid） radical scavenging activity （ABTS） and ferric ion-reducing power （RP-Fe） assays. Aqueous extract 10% p/v showed anti-inflammatory activity （3h, 48% inhibition, 5h 37% inhibition and 7h 17% inhibition） and antioxidant activity （DPPH, ICs0 （mg/mL） = 0.098 =1： 0.032; ABTS, ICs0 （mg/mL） = 0.022 ~ 0.343, RP-Fe IC50 （mg/mL） = 1.124 ~ 0.146）. In the other hand, the ethanolic extract 5% p/v, presented anti-inflammatory activity （3h, 34% inhibition, 5h 38% inhibition and 7h 35% inhibition） and antioxidant activity （DPPH, IC50 （mg/mL） = 0.133 q- 0.027; ABTS, IC50 （mg/mL） = 0.086 ＋ 0.262, RP-Fe IC50 （mg/mL） = 7.089 ± 0.104）. These results suggest that, also fruits, the aqueous and ethanolic extracts from the stem bark of G. decorticans present significant anti-inflammatory activity and antioxidant properties.展开更多
基金Supported by the National Natural Science Foundation of China(NSFC U1462123)PetroChina Innovation FoundationFundamental Research Funds for the Central Universities of China(22201313007)
文摘When evaluating ionic liquids （ILs） for extractive desulfurization （EDS） of fuel oils, the inevitable presence of water in the system may have a significant and in many cases strongly negative effect. However, few studies have considered this particular issue and a promoted water effect on EDS is scarcely reported. In this work, COSMO-RS was firstly employed to calculate the capacity and selectivity for EDS of various IL/H20 mixtures, which cover different IL characters and a wide water concentration range. Experiments were then conducted with a representative IL [C4MIM]IH2P04], whose stable and even promoted extraction performance with a small amount of water was suggested by COSMO-RS. Through analyses of the desulfurization ratio, the cross- solubility and the water content in the desulfurized fuel, the promoted effect of water within a certain range （〈 10 wt%） was experimentally demonstrated. Moreover, such effect of water was explained combining the viscosity, the solvent-solute interactions and the COSMO-RS based analysis.
文摘In the present work we investigated, for the first time, the anti-inflammatory activity and the antioxidant properties of aqueous and ethanolic extracts, obtained from stem bark of Geoffroea decorticans （Gill. ex Hook. et Am.） Burk. （Fabaceae）. G. decorticans, commonly known as ＂chafiar＂ or ＂chafiarcillo＂, is a traditional argentinean plant used as emollient, balsamic, antitussive, expectorant and anti-inflammatory. The stem bark was collected from San Francisco del Monte de Oro, San Luis, Argentina. Anti-inflammatory activity was evaluated by carrageenan-induced paw edema in rats. Antioxidant activity was tested using 1,1-Diphenyl-2-picrylhydrazyl radical-scavenging activity （DPPH）, 2,2＂-Azino-bis（3-ethylbenzthiazoline-6-sulphonic acid） radical scavenging activity （ABTS） and ferric ion-reducing power （RP-Fe） assays. Aqueous extract 10% p/v showed anti-inflammatory activity （3h, 48% inhibition, 5h 37% inhibition and 7h 17% inhibition） and antioxidant activity （DPPH, ICs0 （mg/mL） = 0.098 =1： 0.032; ABTS, ICs0 （mg/mL） = 0.022 ~ 0.343, RP-Fe IC50 （mg/mL） = 1.124 ~ 0.146）. In the other hand, the ethanolic extract 5% p/v, presented anti-inflammatory activity （3h, 34% inhibition, 5h 38% inhibition and 7h 35% inhibition） and antioxidant activity （DPPH, IC50 （mg/mL） = 0.133 q- 0.027; ABTS, IC50 （mg/mL） = 0.086 ＋ 0.262, RP-Fe IC50 （mg/mL） = 7.089 ± 0.104）. These results suggest that, also fruits, the aqueous and ethanolic extracts from the stem bark of G. decorticans present significant anti-inflammatory activity and antioxidant properties.
