To investigate how the physicochemical properties and NH3‐selective catalytic reduction(NH3‐SCR)performance of supported ceria‐based catalysts are influenced as a function of support type,a series of CeO2/SiO2,CeO2...To investigate how the physicochemical properties and NH3‐selective catalytic reduction(NH3‐SCR)performance of supported ceria‐based catalysts are influenced as a function of support type,a series of CeO2/SiO2,CeO2/γ‐Al2O3,CeO2/ZrO2,and CeO2/TiO2catalysts were prepared.The physicochemical properties were probed by means of X‐ray diffraction,Raman spectroscopy,Brunauer‐Emmett‐Teller surface area measurements,X‐ray photoelectron spectroscopy,H2‐temperature programmed reduction,and NH3‐temperature programmed desorption.Furthermore,the supported ceria‐based catalysts'catalytic performance and H2O+SO2tolerance were evaluated by the NH3‐SCR model reaction.The results indicate that out of the supported ceria‐based catalysts studied,the CeO2/γ‐Al2O3catalyst exhibits the highest catalytic activity as a result of having a high relative Ce3+/Ce4+ratio,optimum reduction behavior,and the largest total acid site concentration.Finally,the CeO2/γ‐Al2O3catalyst also presents excellent H2O+SO2tolerance during the NH3‐SCR process.展开更多
目的 探讨预防性加温输液在急诊严重创伤患者中的应用效果。方法 选取2022年1月至12月上海市第六人民医院收治的急诊严重创伤患者84例,采用随机数字表法分为对照组(42例)和观察组(42例)。对照组采用常规干预和常规保温措施,观察组在对...目的 探讨预防性加温输液在急诊严重创伤患者中的应用效果。方法 选取2022年1月至12月上海市第六人民医院收治的急诊严重创伤患者84例,采用随机数字表法分为对照组(42例)和观察组(42例)。对照组采用常规干预和常规保温措施,观察组在对照组的基础上进行预防性加温输液。比较两组体温值、凝血指标和酸碱指标变化,28 d存活率,寒战、低体温发生率。结果 两组体温组间、时间点及交互作用比较,差异有统计学意义(P<0.05)。进一步两两比较,组内比较:两组组内各时间点体温值比较,差异无统计学意义(P>0.05);组间比较:观察组入院后4、8、12、24 h体温值高于对照组,差异有统计学意义(P<0.05)。两组TT水平组间、时间点及交互作用比较,差异有统计学意义(P<0.05)。其中,两组入院后24 h TT水平高于入院时,观察组入院6、12、24 h TT水平低于对照组,差异有统计学意义(P<0.05)。两组不同时间FIB水平比较,差异有统计学意义(P<0.05)。其中两组入院后24 h FIB水平低于入院时,差异有统计学意义(P<0.05)。两组不同时间点血乳酸水平比较,差异有统计学意义(P<0.05)。其中两组入院后6、12、24 h血乳酸水平高于入院时,差异有统计学意义(P<0.05)。两组p H值水平组间、时间点比较,差异有统计学意义(P<0.05)。其中两组入院后6、12、24 h p H值水平低于入院时,差异有统计学意义(P<0.05)。观察组寒战、低体温发生率低于对照组,差异有统计学意义(P<0.05)。两组28 d存活率比较,差异无统计学意义(P>0.05)。结论 预防性加温输液可减少寒战和低体温的发生,并改善患者凝血功能。展开更多
The reaction mechanism of IA/MA copolymer system andcotton cellulose is conjectured and verified, the two keysteps, such as the formation of cyclic anhydride interme-diates and the building of ester crosslinklng, and ...The reaction mechanism of IA/MA copolymer system andcotton cellulose is conjectured and verified, the two keysteps, such as the formation of cyclic anhydride interme-diates and the building of ester crosslinklng, and the ef-fect of sodium hypophosphite are especially emphasized,by FT - IR spectroscopy and acid- base titration anal-yses. The experiments reveal that carboxylic acids main.ly change to cyclic anhydride in the pre - drying step andSodium Hypophosphite (SHP) has effect on it, but mostester - crosslinkages are built in the curing step and SHPhas effects on both anhydride formation and ester -crosslinking formation.展开更多
Here we have synthesized cancer targeting drug delivery system that contains β-cyclodextrin as a drug carrier and folic acid as a targeting ligand. Folic acid was selected as a cancer targeting ligand because folic a...Here we have synthesized cancer targeting drug delivery system that contains β-cyclodextrin as a drug carrier and folic acid as a targeting ligand. Folic acid was selected as a cancer targeting ligand because folic acid receptors are highly expressed in a variety of tumor types. β-cyclodextrin and folic acid were connected through a linker [1,10-phenanthroline or 5-(hydroxymethyl) furfural]. β-cyclodextrin and folic acid were attached to the linker by formation of Schiffbase and ester, respectively. Our targeted synthetic products were confirmed by NMR, Mass and IR spectroscopy. We anticipate that our synthetic products can confer cancer cell-specific drug delivery as well as desired properties such as nanoparticle formation.展开更多
On the line of a previous work on the spectral properties of some of heteroaryl chalcone, the effect of medium acidity and photoreactivity of 3-（4-dimethylamino-phenyl）-l-（2,5-dimethyl-thiophen-3-yl）-propenone （D...On the line of a previous work on the spectral properties of some of heteroaryl chalcone, the effect of medium acidity and photoreactivity of 3-（4-dimethylamino-phenyl）-l-（2,5-dimethyl-thiophen-3-yl）-propenone （DDTP） has been investigated in dimethylformamide and in chloromethane solvents such as methylenechloride, chloroform and carbon tetrachloride. The dye solution （ca. 5×10^-4 mol·L^-1 in DMF） gives a good laser emission in the range 470 --560 nm with emission maximum at 515 nm upon pumping by nitrogen laser （λex=337.1 nm）. The laser parameters such as gain coefficient （a）, emission cross section （Cre） and half life energy （E1/2） at maximum laser emission are also determined.展开更多
基金supported by the National Natural Science Foundation of China (21507130)the Chongqing Science and Technology Commission (cstc2016jcyjA 0070,cstc2014pt-gc20002,cstc2014yykfC 20003,cstckjcxljrc13)the Open Project Program of Chongqing Key Laboratory of Ca-talysis and Functional Organic Molecules from Chongqing Technology and Business University (1456029)~~
文摘To investigate how the physicochemical properties and NH3‐selective catalytic reduction(NH3‐SCR)performance of supported ceria‐based catalysts are influenced as a function of support type,a series of CeO2/SiO2,CeO2/γ‐Al2O3,CeO2/ZrO2,and CeO2/TiO2catalysts were prepared.The physicochemical properties were probed by means of X‐ray diffraction,Raman spectroscopy,Brunauer‐Emmett‐Teller surface area measurements,X‐ray photoelectron spectroscopy,H2‐temperature programmed reduction,and NH3‐temperature programmed desorption.Furthermore,the supported ceria‐based catalysts'catalytic performance and H2O+SO2tolerance were evaluated by the NH3‐SCR model reaction.The results indicate that out of the supported ceria‐based catalysts studied,the CeO2/γ‐Al2O3catalyst exhibits the highest catalytic activity as a result of having a high relative Ce3+/Ce4+ratio,optimum reduction behavior,and the largest total acid site concentration.Finally,the CeO2/γ‐Al2O3catalyst also presents excellent H2O+SO2tolerance during the NH3‐SCR process.
文摘目的 探讨预防性加温输液在急诊严重创伤患者中的应用效果。方法 选取2022年1月至12月上海市第六人民医院收治的急诊严重创伤患者84例,采用随机数字表法分为对照组(42例)和观察组(42例)。对照组采用常规干预和常规保温措施,观察组在对照组的基础上进行预防性加温输液。比较两组体温值、凝血指标和酸碱指标变化,28 d存活率,寒战、低体温发生率。结果 两组体温组间、时间点及交互作用比较,差异有统计学意义(P<0.05)。进一步两两比较,组内比较:两组组内各时间点体温值比较,差异无统计学意义(P>0.05);组间比较:观察组入院后4、8、12、24 h体温值高于对照组,差异有统计学意义(P<0.05)。两组TT水平组间、时间点及交互作用比较,差异有统计学意义(P<0.05)。其中,两组入院后24 h TT水平高于入院时,观察组入院6、12、24 h TT水平低于对照组,差异有统计学意义(P<0.05)。两组不同时间FIB水平比较,差异有统计学意义(P<0.05)。其中两组入院后24 h FIB水平低于入院时,差异有统计学意义(P<0.05)。两组不同时间点血乳酸水平比较,差异有统计学意义(P<0.05)。其中两组入院后6、12、24 h血乳酸水平高于入院时,差异有统计学意义(P<0.05)。两组p H值水平组间、时间点比较,差异有统计学意义(P<0.05)。其中两组入院后6、12、24 h p H值水平低于入院时,差异有统计学意义(P<0.05)。观察组寒战、低体温发生率低于对照组,差异有统计学意义(P<0.05)。两组28 d存活率比较,差异无统计学意义(P>0.05)。结论 预防性加温输液可减少寒战和低体温的发生,并改善患者凝血功能。
文摘The reaction mechanism of IA/MA copolymer system andcotton cellulose is conjectured and verified, the two keysteps, such as the formation of cyclic anhydride interme-diates and the building of ester crosslinklng, and the ef-fect of sodium hypophosphite are especially emphasized,by FT - IR spectroscopy and acid- base titration anal-yses. The experiments reveal that carboxylic acids main.ly change to cyclic anhydride in the pre - drying step andSodium Hypophosphite (SHP) has effect on it, but mostester - crosslinkages are built in the curing step and SHPhas effects on both anhydride formation and ester -crosslinking formation.
文摘Here we have synthesized cancer targeting drug delivery system that contains β-cyclodextrin as a drug carrier and folic acid as a targeting ligand. Folic acid was selected as a cancer targeting ligand because folic acid receptors are highly expressed in a variety of tumor types. β-cyclodextrin and folic acid were connected through a linker [1,10-phenanthroline or 5-(hydroxymethyl) furfural]. β-cyclodextrin and folic acid were attached to the linker by formation of Schiffbase and ester, respectively. Our targeted synthetic products were confirmed by NMR, Mass and IR spectroscopy. We anticipate that our synthetic products can confer cancer cell-specific drug delivery as well as desired properties such as nanoparticle formation.
文摘On the line of a previous work on the spectral properties of some of heteroaryl chalcone, the effect of medium acidity and photoreactivity of 3-（4-dimethylamino-phenyl）-l-（2,5-dimethyl-thiophen-3-yl）-propenone （DDTP） has been investigated in dimethylformamide and in chloromethane solvents such as methylenechloride, chloroform and carbon tetrachloride. The dye solution （ca. 5×10^-4 mol·L^-1 in DMF） gives a good laser emission in the range 470 --560 nm with emission maximum at 515 nm upon pumping by nitrogen laser （λex=337.1 nm）. The laser parameters such as gain coefficient （a）, emission cross section （Cre） and half life energy （E1/2） at maximum laser emission are also determined.
