目的探讨器官系统整合课程在临床医学专业本科生中的教学效果。方法采用回顾性队列方法,以2011至2016级上海交通大学医学院临床医学专业本科生284人为研究对象。其中观察组2014至2016级本科生147人采取基础医学课程实施器官系统整合模...目的探讨器官系统整合课程在临床医学专业本科生中的教学效果。方法采用回顾性队列方法,以2011至2016级上海交通大学医学院临床医学专业本科生284人为研究对象。其中观察组2014至2016级本科生147人采取基础医学课程实施器官系统整合模式教学,对照组2011至2013级本科生137人采取以学科为中心的传统模式教学。问卷调查观察组学生对器官系统整合课程教学的评价。采用SPSS 21.0进行独立样本t检验。结果观察组学生内科学以问题为基础的学习(problem based learning,PBL)考试成绩[(86.34±2.74)分]、外科学理论成绩[(79.69±8.41)分]及外科学操作考试成绩[(81.43±10.72)分]均优于对照组[(85.51±3.36)分、(77.18±6.92)分、(76.78±11.29)分](P<0.05),妇产科学理论及儿科学理论考试成绩低于对照组(P<0.05),内科学理论考试成绩与对照组比较差异无统计学意义(P=0.935)。观察组学生对器官系统整合课程教学满意率为83.75%。结论器官系统整合课程教学应用了多种教学方法,有助于学生综合素质的提升,但对学生学习自主性有一定的要求。展开更多
极性有机化合物整合采样技术(Polar organic chemical integrative samplers,POCIS)适用于极性有机污染物的采集,随着新型极性有机污染物的不断出现,该技术已经引起了科学家的广泛关注.本文概述了几种常用的被动采样装置,重点介绍了POCI...极性有机化合物整合采样技术(Polar organic chemical integrative samplers,POCIS)适用于极性有机污染物的采集,随着新型极性有机污染物的不断出现,该技术已经引起了科学家的广泛关注.本文概述了几种常用的被动采样装置,重点介绍了POCIS采样器的一般结构、富集原理、环境因素如流速、温度、pH、溶解性有机质、盐度及膜的污染等对采样速率的影响,讨论了针对极性物质检测的质量控制和保证以及性能参考物质,综述了POCIS在水环境有机污染物监测中的应用.最后,本文对POCIS的应用前景进行了展望.展开更多
Organic optoelectronic integrated devices(OIDs) with ultraviolet(UV) photodetectivity and different color emitting were constructed by using a thermally activated delayed fluorescence(TADF) material 4, 5-bis(ca...Organic optoelectronic integrated devices(OIDs) with ultraviolet(UV) photodetectivity and different color emitting were constructed by using a thermally activated delayed fluorescence(TADF) material 4, 5-bis(carbazol-9-yl)-1, 2-dicyanobenzene(2 CzPN) as host. The OIDs doping with typical red phosphorescent dye [tris(1-phenylisoquinoline)iridium(Ⅲ), Ir(piq)3], orange phosphorescent dye {bis[2-(4-tertbutylphenyl)benzothiazolato-N,C-(2')]iridium(acetylacetonate),(tbt)2 Ir(acac)}, and blue phosphorescent dye [bis(2, 4-di-fluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(Ⅲ), FIr6] were investigated and compared. The(tbt)2 Ir(acac)-doped orange device showed better performance than those of red and blue devices, which was ascribed to more effective energy transfer. Meanwhile, at a low dopant concentration of 3 wt.%, the(tbt)2 Ir(acac)-doped OIDs showed the maximum luminance, current efficiency, power efficiency of 70786 cd/m^2, 39.55 cd/A, and 23.92 lm/W, respectively, and a decent detectivity of 1.07 × 10^11 Jones at a bias of -2 V under the UV-350 nm illumination. This work may arouse widespread interest in constructing high efficiency and luminance OIDs based on doping phosphorescent dye.展开更多
明确水环境中农残的污染状况对研究其环境行为和生态风险至关重要。传统主动采样法耗能、耗力且单次采样仅获得瞬时浓度值。被动采样节能、方便且为时间加权平均浓度,利于大规模采样。极性有机物整合采样技术(polar organic chemical in...明确水环境中农残的污染状况对研究其环境行为和生态风险至关重要。传统主动采样法耗能、耗力且单次采样仅获得瞬时浓度值。被动采样节能、方便且为时间加权平均浓度,利于大规模采样。极性有机物整合采样技术(polar organic chemical integrative sampler,POCIS)是针对极性有机物的被动采样技术,近年来在水环境中农药监测的运用越来越广泛。本文概述了POCIS结构、原理和校正方法,探讨了环境因素(如水流速率、温度、p H、溶解性有机质、盐度和膜污染)、化合物性质及POCIS结构对农药采样速率(Rs)的影响。此外,综述了POCIS在监测水环境中农药的应用,展望了POCIS在该领域中的问题、解决方式及前景。展开更多
文摘目的探讨器官系统整合课程在临床医学专业本科生中的教学效果。方法采用回顾性队列方法,以2011至2016级上海交通大学医学院临床医学专业本科生284人为研究对象。其中观察组2014至2016级本科生147人采取基础医学课程实施器官系统整合模式教学,对照组2011至2013级本科生137人采取以学科为中心的传统模式教学。问卷调查观察组学生对器官系统整合课程教学的评价。采用SPSS 21.0进行独立样本t检验。结果观察组学生内科学以问题为基础的学习(problem based learning,PBL)考试成绩[(86.34±2.74)分]、外科学理论成绩[(79.69±8.41)分]及外科学操作考试成绩[(81.43±10.72)分]均优于对照组[(85.51±3.36)分、(77.18±6.92)分、(76.78±11.29)分](P<0.05),妇产科学理论及儿科学理论考试成绩低于对照组(P<0.05),内科学理论考试成绩与对照组比较差异无统计学意义(P=0.935)。观察组学生对器官系统整合课程教学满意率为83.75%。结论器官系统整合课程教学应用了多种教学方法,有助于学生综合素质的提升,但对学生学习自主性有一定的要求。
文摘极性有机化合物整合采样技术(Polar organic chemical integrative samplers,POCIS)适用于极性有机污染物的采集,随着新型极性有机污染物的不断出现,该技术已经引起了科学家的广泛关注.本文概述了几种常用的被动采样装置,重点介绍了POCIS采样器的一般结构、富集原理、环境因素如流速、温度、pH、溶解性有机质、盐度及膜的污染等对采样速率的影响,讨论了针对极性物质检测的质量控制和保证以及性能参考物质,综述了POCIS在水环境有机污染物监测中的应用.最后,本文对POCIS的应用前景进行了展望.
基金Project supported by the National Natural Science Foundation of China(Grant No.61675041)the National Science Funds for Creative Research Groups of China(Grant No.61421002)
文摘Organic optoelectronic integrated devices(OIDs) with ultraviolet(UV) photodetectivity and different color emitting were constructed by using a thermally activated delayed fluorescence(TADF) material 4, 5-bis(carbazol-9-yl)-1, 2-dicyanobenzene(2 CzPN) as host. The OIDs doping with typical red phosphorescent dye [tris(1-phenylisoquinoline)iridium(Ⅲ), Ir(piq)3], orange phosphorescent dye {bis[2-(4-tertbutylphenyl)benzothiazolato-N,C-(2')]iridium(acetylacetonate),(tbt)2 Ir(acac)}, and blue phosphorescent dye [bis(2, 4-di-fluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(Ⅲ), FIr6] were investigated and compared. The(tbt)2 Ir(acac)-doped orange device showed better performance than those of red and blue devices, which was ascribed to more effective energy transfer. Meanwhile, at a low dopant concentration of 3 wt.%, the(tbt)2 Ir(acac)-doped OIDs showed the maximum luminance, current efficiency, power efficiency of 70786 cd/m^2, 39.55 cd/A, and 23.92 lm/W, respectively, and a decent detectivity of 1.07 × 10^11 Jones at a bias of -2 V under the UV-350 nm illumination. This work may arouse widespread interest in constructing high efficiency and luminance OIDs based on doping phosphorescent dye.