A new method is presented for getting the general thermal response factors and z-transfer functioncoefficients of a room by synthesizing them from the thermal response factors of different parts of the thermalinsulati...A new method is presented for getting the general thermal response factors and z-transfer functioncoefficients of a room by synthesizing them from the thermal response factors of different parts of the thermalinsulation structure. How to use the general thermal response factors and z-transfer function coefficients toca1culate the indoor air temperature variation directly is also studied. It is shown through practical use that it iseasy to program with the methods presented in this paper and the calculated results are reliable.展开更多
Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1,3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts and corresponding acidic room temperature ion...Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1,3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts and corresponding acidic room temperature ionic liquids have been synthesized. The hydroxyl groups of the synthesized substances were confirmed by the 1H NMR measurement. These zwitterionic salts and ionic liquids may be used for synthesizing other functionalized ionic liquids or ionic liquid-polymer (polyelectrolyte).展开更多
目的观察基于“顺肠通气”中医理念的中医手术室管理方案促进腹部手术患者胃肠道功能恢复的临床效果。方法纳入手术室中接受腹部手术治疗的患者112例,以随机抽签法分为2组,对照组56例实施常规手术室管理,研究组56例在对照组基础上增加...目的观察基于“顺肠通气”中医理念的中医手术室管理方案促进腹部手术患者胃肠道功能恢复的临床效果。方法纳入手术室中接受腹部手术治疗的患者112例,以随机抽签法分为2组,对照组56例实施常规手术室管理,研究组56例在对照组基础上增加“顺肠通气”中医理念指导下的手术室管理方案。对比不同管理方案下腹部手术患者术后胃肠道功能恢复情况、胃肠激素[胃动素(MTL)、胃泌素(GAS)、血管活性肽(VIP)及胆囊收缩素(CCK)]水平、舒适度、疼痛评分的影响差异。结果研究组干预后肠鸣音恢复、首次排气及首次排便时间均早于对照组(P<0.05)。术后24、72 h,研究组疼痛评分均低于对照组(P<0.05),舒适度评分均高于对照组(P<0.05)。2组术后4 d MTL、GAS、VIP及CCK表达水平均降低(P<0.05),且研究组术后4 d均高于对照组(P<0.05)。结论基于“顺肠通气”中医理念的中医手术室管理方案能够改善腹部手术患者的胃肠道功能,调节胃肠激素表达,减轻疼痛程度,优化患者舒适度。展开更多
The NO oxidation processes on CrO_2(110) was investigated by virtue of DFT + U calculation together with microkinetic analysis, aiming to uncover the reaction mechanism and activity-limiting factors for CrO_2 catalyst...The NO oxidation processes on CrO_2(110) was investigated by virtue of DFT + U calculation together with microkinetic analysis, aiming to uncover the reaction mechanism and activity-limiting factors for CrO_2 catalyst. It was found that NO oxidation on CrO_2(110) has to be triggered with the lattice Obri involved(Mars-van Krevelen mechanism) rather than the Langmuir-Hinshelwood path occurring at the Cr_(5 c) sites alone. Specifically, the optimal reaction path was identified. Quantitatively, the microkinetic analysis showed that CrO_2(110) can exhibit a high turnover rate of 0.978 s^(-1) for NO oxidation at room temperature.Such an activity could originate from the bifunctional synergetic catalytic mechanism, in which the Cr_(5c)sites can exclusively adsorb NO and the Obri is very reactive and provides oxidative species. However, it is worth noting that, as the reactive Obri tightly binds NO_2, the nitrate species was found to be difficult removed and constituted the key poisoning species, eventually limiting the overall activity of CrO_2. This work demonstrated the considerable catalytic ability of CrO_2 for NO oxidation at room temperature, and the understanding may facilitate the further design of more active Cr-based catalyst.展开更多
文摘A new method is presented for getting the general thermal response factors and z-transfer functioncoefficients of a room by synthesizing them from the thermal response factors of different parts of the thermalinsulation structure. How to use the general thermal response factors and z-transfer function coefficients toca1culate the indoor air temperature variation directly is also studied. It is shown through practical use that it iseasy to program with the methods presented in this paper and the calculated results are reliable.
文摘Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1,3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts and corresponding acidic room temperature ionic liquids have been synthesized. The hydroxyl groups of the synthesized substances were confirmed by the 1H NMR measurement. These zwitterionic salts and ionic liquids may be used for synthesizing other functionalized ionic liquids or ionic liquid-polymer (polyelectrolyte).
文摘目的观察基于“顺肠通气”中医理念的中医手术室管理方案促进腹部手术患者胃肠道功能恢复的临床效果。方法纳入手术室中接受腹部手术治疗的患者112例,以随机抽签法分为2组,对照组56例实施常规手术室管理,研究组56例在对照组基础上增加“顺肠通气”中医理念指导下的手术室管理方案。对比不同管理方案下腹部手术患者术后胃肠道功能恢复情况、胃肠激素[胃动素(MTL)、胃泌素(GAS)、血管活性肽(VIP)及胆囊收缩素(CCK)]水平、舒适度、疼痛评分的影响差异。结果研究组干预后肠鸣音恢复、首次排气及首次排便时间均早于对照组(P<0.05)。术后24、72 h,研究组疼痛评分均低于对照组(P<0.05),舒适度评分均高于对照组(P<0.05)。2组术后4 d MTL、GAS、VIP及CCK表达水平均降低(P<0.05),且研究组术后4 d均高于对照组(P<0.05)。结论基于“顺肠通气”中医理念的中医手术室管理方案能够改善腹部手术患者的胃肠道功能,调节胃肠激素表达,减轻疼痛程度,优化患者舒适度。
基金supported by the National Natural Science Foundation of China(NSFC,Nos.21333003,21622305)National Ten Thousand Talent Program for Young Top-notch Talents in ChinaThe Shanghai Shuguang Scholar Program(No.17SG30)
文摘The NO oxidation processes on CrO_2(110) was investigated by virtue of DFT + U calculation together with microkinetic analysis, aiming to uncover the reaction mechanism and activity-limiting factors for CrO_2 catalyst. It was found that NO oxidation on CrO_2(110) has to be triggered with the lattice Obri involved(Mars-van Krevelen mechanism) rather than the Langmuir-Hinshelwood path occurring at the Cr_(5 c) sites alone. Specifically, the optimal reaction path was identified. Quantitatively, the microkinetic analysis showed that CrO_2(110) can exhibit a high turnover rate of 0.978 s^(-1) for NO oxidation at room temperature.Such an activity could originate from the bifunctional synergetic catalytic mechanism, in which the Cr_(5c)sites can exclusively adsorb NO and the Obri is very reactive and provides oxidative species. However, it is worth noting that, as the reactive Obri tightly binds NO_2, the nitrate species was found to be difficult removed and constituted the key poisoning species, eventually limiting the overall activity of CrO_2. This work demonstrated the considerable catalytic ability of CrO_2 for NO oxidation at room temperature, and the understanding may facilitate the further design of more active Cr-based catalyst.
