A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.Th...A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.展开更多
With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (...With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.展开更多
目的:系统性评价中药制剂联合高效抗反转录病毒疗法(highly active anti-retroviral therapy,HAART)治疗艾滋病患者免疫重建不良的效果。方法:计算机检索中国知网、维普数据库、万方数据库、Pubmed,搜集中药制剂联合HAART治疗艾滋病患...目的:系统性评价中药制剂联合高效抗反转录病毒疗法(highly active anti-retroviral therapy,HAART)治疗艾滋病患者免疫重建不良的效果。方法:计算机检索中国知网、维普数据库、万方数据库、Pubmed,搜集中药制剂联合HAART治疗艾滋病患者免疫重建不良随机对照试验(randomized controlled trials,RCT)文献,根据改良版Jadad量表对纳入文献进行质量评价,使用Rev Man5.3软件对纳入文献进行Meta分析。结果:共纳入5个RCT文献,涉及761例患者,Meta分析结果显示,中药制剂联合HAART治疗艾滋病患者的CD_4^+T细胞变化情况,治疗组优于对照组{MD=31.61,95%CI=[16.73,46.49]},其治疗组有效率高于对照组{OR=2.07,95%CI=[1.51,2.85]}。结论:中药制剂联合HAART治疗艾滋病患者免疫重建不良的疗效优于单用HAART。展开更多
目的:系统评价中成药联合高效抗逆转录病毒(highly active antiretroviral therapy,HAART)治疗艾滋病疗效。方法:检索日期为2013年1月至2018年4月,计算机检索的外文数据库主要是PubMed和Cochrane图书馆,中文文献数据库主要是CNKI、VIP、...目的:系统评价中成药联合高效抗逆转录病毒(highly active antiretroviral therapy,HAART)治疗艾滋病疗效。方法:检索日期为2013年1月至2018年4月,计算机检索的外文数据库主要是PubMed和Cochrane图书馆,中文文献数据库主要是CNKI、VIP、CBM和万方数据库,主要阅读国内中成药联合HAART治疗艾滋病的各类研究文献,符合临床随机对照试验,并不要求具体的分配隐藏和盲法类别。研究文献为全文文献,语言为中文和英文,并应用R3.5.0软件中的Meta程序包对本系统评价的指标进行分析。结果:共纳入10篇文献,中药益气扶正法联合HAART可以提高艾滋病患者的CD4^+T淋巴细胞水平、体质量,提高疗效,改善中医证候积分。结论:根据现有文献显示,中西医联合HAART治疗艾滋病具有一定的疗效,但是所纳入的文献都存在一定程度的选择偏倚,从而影响结果的论证强度,而结论的可靠性还需要进一步大样本多中心的试验研究来证实。展开更多
Background The operating microscopes have been applied to modern surgery for nearly a century.However,generations of microsurgeons have to flex their necks and fix their eyes on the eyepieces of a microscope continual...Background The operating microscopes have been applied to modern surgery for nearly a century.However,generations of microsurgeons have to flex their necks and fix their eyes on the eyepieces of a microscope continually that leads to physical and mental fatigue during a long operation.Stereoscopic three-dimensional （3D） media provides more ergonomic working environment,subsequently,resulting better performance in tasks and more accurate judgment.In this study,an alternative method of magnification was analyzed using a three-dimensional microsurgical video system and compared with the traditional method under microscopy to evaluate the availability and feasibility of a 3D microsurgical video system for microvascular anastomosis.Methods Forty Sprague-Dawley rats were randomly divided into four groups with each of 10.In 20 rats,10 femoral artery anastomoses with a conventional microscope （arterial microscope group） were compared with that of 10 femoral artery anastomoses with a 3D microsurgical video system （arterial 3D group）.For the other 20 rats,10 femoral vein anastomoses using a conventional microscope （venous microscope group） were compared with that of 10 femoral vein anastomoses using a 3D microsurgical video system （venous 3D group）.The arterial and venous microscope groups were considered to be the control groups.The arterial and venous 3D groups were the experimental groups.The examined criteria were as follows：anastomotic time,patency right after the procedure and 10 days later,number of sutures,vessel caliber,and pathological features.Results There were no differences between the operating equipment with respect to vessel caliber,anastomotic time,patency rate,number of sutures,and pathological changes in either the small arteries or veins.The average arterial anastomotic time of the arterial microscope group and arterial 3D group was 34.21 and 33.87 minutes,respectively （P ＞0.05）.The average venous anastomotic time of the venous microscope group and venous 3D group was 29.95 and 31.50 minutes,respectively （P ＞0.05）.Conclusions A small vessel anastomosis can be performed successfully with the help of a 3D display system.Although the vascular anastomotic time did not demonstrate a significant difference between the groups,the 3D microsurgical video system offers another option to improve the working environment for surgeons.Further development of our 3D monitoring system should focus on a higher resolution and better flexibility.展开更多
基金the National Natural Science Foundation of Chinapartially by YOK YING TONG Educational Foundation.
文摘A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.
文摘With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.
文摘目的:系统评价中成药联合高效抗逆转录病毒(highly active antiretroviral therapy,HAART)治疗艾滋病疗效。方法:检索日期为2013年1月至2018年4月,计算机检索的外文数据库主要是PubMed和Cochrane图书馆,中文文献数据库主要是CNKI、VIP、CBM和万方数据库,主要阅读国内中成药联合HAART治疗艾滋病的各类研究文献,符合临床随机对照试验,并不要求具体的分配隐藏和盲法类别。研究文献为全文文献,语言为中文和英文,并应用R3.5.0软件中的Meta程序包对本系统评价的指标进行分析。结果:共纳入10篇文献,中药益气扶正法联合HAART可以提高艾滋病患者的CD4^+T淋巴细胞水平、体质量,提高疗效,改善中医证候积分。结论:根据现有文献显示,中西医联合HAART治疗艾滋病具有一定的疗效,但是所纳入的文献都存在一定程度的选择偏倚,从而影响结果的论证强度,而结论的可靠性还需要进一步大样本多中心的试验研究来证实。
文摘Background The operating microscopes have been applied to modern surgery for nearly a century.However,generations of microsurgeons have to flex their necks and fix their eyes on the eyepieces of a microscope continually that leads to physical and mental fatigue during a long operation.Stereoscopic three-dimensional （3D） media provides more ergonomic working environment,subsequently,resulting better performance in tasks and more accurate judgment.In this study,an alternative method of magnification was analyzed using a three-dimensional microsurgical video system and compared with the traditional method under microscopy to evaluate the availability and feasibility of a 3D microsurgical video system for microvascular anastomosis.Methods Forty Sprague-Dawley rats were randomly divided into four groups with each of 10.In 20 rats,10 femoral artery anastomoses with a conventional microscope （arterial microscope group） were compared with that of 10 femoral artery anastomoses with a 3D microsurgical video system （arterial 3D group）.For the other 20 rats,10 femoral vein anastomoses using a conventional microscope （venous microscope group） were compared with that of 10 femoral vein anastomoses using a 3D microsurgical video system （venous 3D group）.The arterial and venous microscope groups were considered to be the control groups.The arterial and venous 3D groups were the experimental groups.The examined criteria were as follows：anastomotic time,patency right after the procedure and 10 days later,number of sutures,vessel caliber,and pathological features.Results There were no differences between the operating equipment with respect to vessel caliber,anastomotic time,patency rate,number of sutures,and pathological changes in either the small arteries or veins.The average arterial anastomotic time of the arterial microscope group and arterial 3D group was 34.21 and 33.87 minutes,respectively （P ＞0.05）.The average venous anastomotic time of the venous microscope group and venous 3D group was 29.95 and 31.50 minutes,respectively （P ＞0.05）.Conclusions A small vessel anastomosis can be performed successfully with the help of a 3D display system.Although the vascular anastomotic time did not demonstrate a significant difference between the groups,the 3D microsurgical video system offers another option to improve the working environment for surgeons.Further development of our 3D monitoring system should focus on a higher resolution and better flexibility.
