In the work,rGO nanosheet is synthesized using the typical Hummer’s method,then Cu12Sb4 S13 quantum dots@rGO composites are prepared by solvent thermal method,and Cu12Sb4 S13 quantum dots with the average size of 5 n...In the work,rGO nanosheet is synthesized using the typical Hummer’s method,then Cu12Sb4 S13 quantum dots@rGO composites are prepared by solvent thermal method,and Cu12Sb4 S13 quantum dots with the average size of 5 nm are densely distributed on the surface of rGO sheet.NH3 gas response of Cu12Sb4 S13quantum dots@rGO nanosheet composites at room te mperature of 25℃is enhanced compared with the pure Cu12Sb4 S13 quantum dots and rGO nanosheet,and the composites possess an excellent stability during the humidity range of 45%-80%with a low detection limit of 1 ppm,which is related with the intrinsic hydrophobicity characteristic of Cu12Sb4 S13 quantum dots.It also proves that Cu12Sb4 S13quantum dots@rGO nanosheet composites have a quite high selectivity towards ammonia compared with ethanol,methanol,acetone,toluene,hydrogen sulfide and nitrogen dioxide at room temperature.The gas sensing mechanism of the composites is discussed primarily.展开更多
目的:通过检测卵巢癌患者血清中人附睾蛋白4(human epid idym is protein 4,HE4)、CA125和可溶性B7同源体4(soluble B7 homologous body 4,sB7-H4)的水平,探讨这三项标志物联合检测在卵巢癌早期诊断与预后的临床价值。方法:采用酶联免疫...目的:通过检测卵巢癌患者血清中人附睾蛋白4(human epid idym is protein 4,HE4)、CA125和可溶性B7同源体4(soluble B7 homologous body 4,sB7-H4)的水平,探讨这三项标志物联合检测在卵巢癌早期诊断与预后的临床价值。方法:采用酶联免疫法(ELISA)检测58例不同分期卵巢癌患者及35例健康对照组血清HE4、CA125和sB7-H4的水平以及观察卵巢癌患者手术前后三项指标的水平变化。结果:各期卵巢癌患者血清HE4、CA125和sB7-H4水平均显著高于健康对照组(P<0.01),且三项指标的水平随癌症分期的增高而升高(P<0.01),卵巢癌患者手术后血清三项指标的水平显著低于手术前水平(P<0.001);卵巢癌患者血清HE4、CA125和sB7-H4检测的灵敏度分别为89.66%、77.59%和82.79%,特异性分别为97.37%、84.21%和81.59%,三项指标联合检测的灵敏度和特异性为94.83%和94.74%。三项指标联合检测的灵敏度高于单项检测(P<0.05),特异性高于CA125和sB7-H4单独检测,但低于HE4单独检测。结论:HE4在卵巢癌诊断中有重要意义,尤其在早期卵巢癌的诊断中其灵敏度及特异性均优于CA125和sB7-H4,三项指标联合检测可提高卵巢癌的早期诊断率。展开更多
基金supported by the National Natural Science Foundation of China(No.11674258)the 111 Project(No.B18038)+4 种基金Key projects of Natural Science Foundation of Hubei Province(No.2019CFA044)Applied Basic Research Program of Wuhan(No.2018010401011278)Science and Technology Innovation Program of Hubei Province(No.2018B KJ005)Natural Science Foundation of Hunan Province,China(No.2018JJ3527)Students Innovation and Entrepreneurship Training Program(No.20181049721003)。
文摘In the work,rGO nanosheet is synthesized using the typical Hummer’s method,then Cu12Sb4 S13 quantum dots@rGO composites are prepared by solvent thermal method,and Cu12Sb4 S13 quantum dots with the average size of 5 nm are densely distributed on the surface of rGO sheet.NH3 gas response of Cu12Sb4 S13quantum dots@rGO nanosheet composites at room te mperature of 25℃is enhanced compared with the pure Cu12Sb4 S13 quantum dots and rGO nanosheet,and the composites possess an excellent stability during the humidity range of 45%-80%with a low detection limit of 1 ppm,which is related with the intrinsic hydrophobicity characteristic of Cu12Sb4 S13 quantum dots.It also proves that Cu12Sb4 S13quantum dots@rGO nanosheet composites have a quite high selectivity towards ammonia compared with ethanol,methanol,acetone,toluene,hydrogen sulfide and nitrogen dioxide at room temperature.The gas sensing mechanism of the composites is discussed primarily.
文摘目的:通过检测卵巢癌患者血清中人附睾蛋白4(human epid idym is protein 4,HE4)、CA125和可溶性B7同源体4(soluble B7 homologous body 4,sB7-H4)的水平,探讨这三项标志物联合检测在卵巢癌早期诊断与预后的临床价值。方法:采用酶联免疫法(ELISA)检测58例不同分期卵巢癌患者及35例健康对照组血清HE4、CA125和sB7-H4的水平以及观察卵巢癌患者手术前后三项指标的水平变化。结果:各期卵巢癌患者血清HE4、CA125和sB7-H4水平均显著高于健康对照组(P<0.01),且三项指标的水平随癌症分期的增高而升高(P<0.01),卵巢癌患者手术后血清三项指标的水平显著低于手术前水平(P<0.001);卵巢癌患者血清HE4、CA125和sB7-H4检测的灵敏度分别为89.66%、77.59%和82.79%,特异性分别为97.37%、84.21%和81.59%,三项指标联合检测的灵敏度和特异性为94.83%和94.74%。三项指标联合检测的灵敏度高于单项检测(P<0.05),特异性高于CA125和sB7-H4单独检测,但低于HE4单独检测。结论:HE4在卵巢癌诊断中有重要意义,尤其在早期卵巢癌的诊断中其灵敏度及特异性均优于CA125和sB7-H4,三项指标联合检测可提高卵巢癌的早期诊断率。
