目的探讨术后延长吸氧时间对老年全膝关节置换术(TKA)病人术后疼痛、炎症因子及免疫功能的影响。方法选取2022年1月至2023年1月西安交通大学第二附属医院收治的拟行TKA治疗的病人142例,男65例,女77例;年龄(73.35±7.30)岁。采用随...目的探讨术后延长吸氧时间对老年全膝关节置换术(TKA)病人术后疼痛、炎症因子及免疫功能的影响。方法选取2022年1月至2023年1月西安交通大学第二附属医院收治的拟行TKA治疗的病人142例,男65例,女77例;年龄(73.35±7.30)岁。采用随机数字表法将病人分为观察组和对照组,每组71例。对照组病人术后给予8 h的常规鼻导管低流量(3 L/min)吸氧,观察组在对照组的基础上延长吸氧时间至术后48 h。观察两组术前和术后8、24、48 h简易精神状态检查量表(MMSE)评分和疼痛视觉模拟量表(VAS)评分,术前和术后8、48 h血清炎症因子和免疫功能指标水平;术前和术后24、48 h脉搏血氧饱和度(SpO_(2))、心率和呼吸频率情况。结果观察组术后24、48 h MMSE评分显著高于对照组(P<0.05),VAS评分显著低于对照组(P<0.05)。两组术后24、48 h VAS评分较术前均显著降低(P<0.05)。对照组术后各时点MMSE评分较术前均显著降低(P<0.05),观察组术后8、24 h MMSE评分显著降低(P<0.05)。观察组术后24、48 h SpO_(2)显著高于对照组(P<0.05),心率、呼吸频率显著低于对照组(P<0.05)。观察组术后48 h白介素-10(IL-10)、CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)水平显著高于对照组(P<0.05),白介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)水平显著低于对照组(P<0.05)。与术前比较,两组术后8、48 h血清IL-6、TNF-α水平均显著升高(P<0.05),CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)水平均显著降低(P<0.05)。结论术后延长吸氧时间可降低老年TKA病人疼痛,提高病人术后免疫功能,改善炎症因子水平。展开更多
Different VSA （Vacuum Swing Adsorption） cycles and process schemes have been evaluated to find suitable process configurations for effectively separating C02 from flue gases from different industrial sectors. The cy...Different VSA （Vacuum Swing Adsorption） cycles and process schemes have been evaluated to find suitable process configurations for effectively separating C02 from flue gases from different industrial sectors. The cycles were studied using an adsorption simulator developed in our research group, which has been suc- cessfully used to predict experimental results over severa~ years. Commercial zeolite APGIlI and granular ac- tivated carbon were used as the adsorbents. Three-bed VSA cycles with- and without-product purge and 2- stage VSA systems have been investigated. It was found that for a feed gas containing 15% CO2 （representing flue gas from power plants）, high CO2 purities and recoveries could be obtained using a three-bed zeolite APGII1 VSA unit for one stage capture, but with more stringent conditions such as deeper vacuum pressures of 1-3 kPa. 2-stage VSA process operated in series allowed us to use simple process steps and operate at more realistic vacuum pressures. With a vacuum pressure of 10 kPa, final C02 purity of 95.3% with a recov- ery of 98.2% were obtained at specific power consumption of 0.55 MJ. （kg CO2） 1 from feed gas containing 15% C02. These numbers compare very well with those obtained from a single stage process operating at I kPa vacuum pressure. The feed CO2 concentration was very influential in determining the desorption pressure necessary to achieve high separation efficiency. For feed gases containing 〉30% CO2, a singlestage VSA capture process operating at moderate vacuum pressure and without a product purge, can achieve very high product purities and recoveries.展开更多
A differential carbon monoxide(CO) concentration sensing device using a self-fabricated spherical mirror(e.g.light-collector) and a multi-pass gas-chamber is presented in this paper.Single-source dual-channel detectio...A differential carbon monoxide(CO) concentration sensing device using a self-fabricated spherical mirror(e.g.light-collector) and a multi-pass gas-chamber is presented in this paper.Single-source dual-channel detection method is adopted to suppress the interferences from light source,optical path and environmental changes.Detection principle of the device is described,and both the optical part and the electrical part are developed.Experiments are carried out to evaluate the sensing performance on CO concentration.The results indicate that at 1.013×10~5 Pa and 298 K,the limit of detection(LoD) is about 11.5 mg/m^3 with an absorption length of 40 cm.As the gas concentration gets larger than115 mg/m^3(1.013×10~5 Pa,298 K),the relative detection error falls into the range of-1.7%—+1.9%.Based on 12 h long-term measurement on the 115 mg/m^3 and 1 150 mg/m^3 CO samples,the maximum detection errors are about0.9%and 5.5%,respectively.Due to the low cost and competitive characteristics,the proposed device shows potential applications in CO detection in the circumstances of coal-mine production and environmental protection.展开更多
The X-ray absorption fine structure(XAFS)technology has exhibited a very unique application in the study of sorption mechanism,chemical species and microstructures of radionuclides at the natural solid-water interface...The X-ray absorption fine structure(XAFS)technology has exhibited a very unique application in the study of sorption mechanism,chemical species and microstructures of radionuclides at the natural solid-water interfaces.In this review,the interaction mechanism of radionuclides with clay minerals and nanomaterials under different environmental conditions are summarized from the XAFS spectroscopy analysis.The coordination number and the bond distances of radionuclides,the oxidation-reduction reactions,the influence of humic substances and microorganisms on the species and structures of radionuclides at molecule level are reviewed and compared.This review is helpful to understand the interactions of radionuclides with oxides,natural clay minerals and nanomaterials,which is also crucial to evaluate the physicochemical behaviors of radionuclides in the natural environment.展开更多
Current state-of-the-art techniques for COz capture are presented and discussed, Post-combustion capture of CO2 by absorption is the technology most easily retrofitted to existing installations, but at present this is...Current state-of-the-art techniques for COz capture are presented and discussed, Post-combustion capture of CO2 by absorption is the technology most easily retrofitted to existing installations, but at present this is not economically viable to install and run. Using ionic liquids instead of aqueous amine solutions overcomes the major thermodynamic issues. By applying SILP tech- nology further advances, in terms of ease of handling and sorption dynamics, are obtained. Initial experimental studies showed that ionic liquids such as tetrahexylammonium prolinate, [N6666][Pro], provide a good candidate for CO2 absorption using SILP technology. Thus a solid SILP absorber comprised of 40 wt% [N6666][Pro] loaded on precalcined silica quantitatively takes up about 1.2 mole CO2 per mole of ionic liquid in consecutive absorption-desorption cycles in a flow-experiment per- formed with 0.09 bar of CO2 （9% CO2 in He）.展开更多
文摘目的探讨术后延长吸氧时间对老年全膝关节置换术(TKA)病人术后疼痛、炎症因子及免疫功能的影响。方法选取2022年1月至2023年1月西安交通大学第二附属医院收治的拟行TKA治疗的病人142例,男65例,女77例;年龄(73.35±7.30)岁。采用随机数字表法将病人分为观察组和对照组,每组71例。对照组病人术后给予8 h的常规鼻导管低流量(3 L/min)吸氧,观察组在对照组的基础上延长吸氧时间至术后48 h。观察两组术前和术后8、24、48 h简易精神状态检查量表(MMSE)评分和疼痛视觉模拟量表(VAS)评分,术前和术后8、48 h血清炎症因子和免疫功能指标水平;术前和术后24、48 h脉搏血氧饱和度(SpO_(2))、心率和呼吸频率情况。结果观察组术后24、48 h MMSE评分显著高于对照组(P<0.05),VAS评分显著低于对照组(P<0.05)。两组术后24、48 h VAS评分较术前均显著降低(P<0.05)。对照组术后各时点MMSE评分较术前均显著降低(P<0.05),观察组术后8、24 h MMSE评分显著降低(P<0.05)。观察组术后24、48 h SpO_(2)显著高于对照组(P<0.05),心率、呼吸频率显著低于对照组(P<0.05)。观察组术后48 h白介素-10(IL-10)、CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)水平显著高于对照组(P<0.05),白介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)水平显著低于对照组(P<0.05)。与术前比较,两组术后8、48 h血清IL-6、TNF-α水平均显著升高(P<0.05),CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)水平均显著降低(P<0.05)。结论术后延长吸氧时间可降低老年TKA病人疼痛,提高病人术后免疫功能,改善炎症因子水平。
基金Supported by the Corporate Research Centre for Greenhouse Gas Technology Foundation in Australiathe National Natural Science Foundation of China(51074205)
文摘Different VSA （Vacuum Swing Adsorption） cycles and process schemes have been evaluated to find suitable process configurations for effectively separating C02 from flue gases from different industrial sectors. The cycles were studied using an adsorption simulator developed in our research group, which has been suc- cessfully used to predict experimental results over severa~ years. Commercial zeolite APGIlI and granular ac- tivated carbon were used as the adsorbents. Three-bed VSA cycles with- and without-product purge and 2- stage VSA systems have been investigated. It was found that for a feed gas containing 15% CO2 （representing flue gas from power plants）, high CO2 purities and recoveries could be obtained using a three-bed zeolite APGII1 VSA unit for one stage capture, but with more stringent conditions such as deeper vacuum pressures of 1-3 kPa. 2-stage VSA process operated in series allowed us to use simple process steps and operate at more realistic vacuum pressures. With a vacuum pressure of 10 kPa, final C02 purity of 95.3% with a recov- ery of 98.2% were obtained at specific power consumption of 0.55 MJ. （kg CO2） 1 from feed gas containing 15% C02. These numbers compare very well with those obtained from a single stage process operating at I kPa vacuum pressure. The feed CO2 concentration was very influential in determining the desorption pressure necessary to achieve high separation efficiency. For feed gases containing 〉30% CO2, a singlestage VSA capture process operating at moderate vacuum pressure and without a product purge, can achieve very high product purities and recoveries.
基金supported in part by the National Key Technology R&D Program of China(Nos.2013BAK06B04 and 2014BAD08B03)the National Natural Science Foundation of China(Nos.61307124 and 11404129)+2 种基金the Science and Technology Department of Jilin Province of China(Nos.20120707 and 20140307014SF)the Changchun Municipal Science and Technology Bureau(Nos.11GH01 and 14KG022)the State Key Laboratory of Integrated Optoelectronics,Jilin University(No.IOSKL2012ZZ12)
文摘A differential carbon monoxide(CO) concentration sensing device using a self-fabricated spherical mirror(e.g.light-collector) and a multi-pass gas-chamber is presented in this paper.Single-source dual-channel detection method is adopted to suppress the interferences from light source,optical path and environmental changes.Detection principle of the device is described,and both the optical part and the electrical part are developed.Experiments are carried out to evaluate the sensing performance on CO concentration.The results indicate that at 1.013×10~5 Pa and 298 K,the limit of detection(LoD) is about 11.5 mg/m^3 with an absorption length of 40 cm.As the gas concentration gets larger than115 mg/m^3(1.013×10~5 Pa,298 K),the relative detection error falls into the range of-1.7%—+1.9%.Based on 12 h long-term measurement on the 115 mg/m^3 and 1 150 mg/m^3 CO samples,the maximum detection errors are about0.9%and 5.5%,respectively.Due to the low cost and competitive characteristics,the proposed device shows potential applications in CO detection in the circumstances of coal-mine production and environmental protection.
基金supported from the National Natural Science Foundation of China(21225730,91326202,21577032)the Fundamental Research Funds for the Central Universities(JB2015001)+1 种基金the Priority Academic Program Development of Jiangsu Higher Education Institutionsthe Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
文摘The X-ray absorption fine structure(XAFS)technology has exhibited a very unique application in the study of sorption mechanism,chemical species and microstructures of radionuclides at the natural solid-water interfaces.In this review,the interaction mechanism of radionuclides with clay minerals and nanomaterials under different environmental conditions are summarized from the XAFS spectroscopy analysis.The coordination number and the bond distances of radionuclides,the oxidation-reduction reactions,the influence of humic substances and microorganisms on the species and structures of radionuclides at molecule level are reviewed and compared.This review is helpful to understand the interactions of radionuclides with oxides,natural clay minerals and nanomaterials,which is also crucial to evaluate the physicochemical behaviors of radionuclides in the natural environment.
文摘Current state-of-the-art techniques for COz capture are presented and discussed, Post-combustion capture of CO2 by absorption is the technology most easily retrofitted to existing installations, but at present this is not economically viable to install and run. Using ionic liquids instead of aqueous amine solutions overcomes the major thermodynamic issues. By applying SILP tech- nology further advances, in terms of ease of handling and sorption dynamics, are obtained. Initial experimental studies showed that ionic liquids such as tetrahexylammonium prolinate, [N6666][Pro], provide a good candidate for CO2 absorption using SILP technology. Thus a solid SILP absorber comprised of 40 wt% [N6666][Pro] loaded on precalcined silica quantitatively takes up about 1.2 mole CO2 per mole of ionic liquid in consecutive absorption-desorption cycles in a flow-experiment per- formed with 0.09 bar of CO2 （9% CO2 in He）.
