针对微流控芯片免疫荧光检测中LED光源不稳定导致检测区和质检区荧光采集同步实时性较差的问题,提出了一种基于光源漂移特性的自适应补偿方法。通过分析光源呈负指数形式衰减的漂移特性,引入光源时变补偿因子,对光源进行自适应补偿,实...针对微流控芯片免疫荧光检测中LED光源不稳定导致检测区和质检区荧光采集同步实时性较差的问题,提出了一种基于光源漂移特性的自适应补偿方法。通过分析光源呈负指数形式衰减的漂移特性,引入光源时变补偿因子,对光源进行自适应补偿,实现微流控芯片高精度、高稳定性检测。对比实验结果表明光源时变补偿因子具有自适应性,且经过补偿后,免疫荧光检测的分辨率达到0.01ng/mL,CV值(离散系数,coefficient of variation)提高约50%,验证了其应用可行性。展开更多
The ultra strength alloy steel with high content of Co and Ni is typical tempering martensite steel, and the secondary hardening is accomplished by the precipitation of fine scale alloy carbides with black white con...The ultra strength alloy steel with high content of Co and Ni is typical tempering martensite steel, and the secondary hardening is accomplished by the precipitation of fine scale alloy carbides with black white contrast until peak hardening. The crystal structure of precipitates was well determined as M 2C with hexagonal by micro beam diffraction. Observing in HREM, M 2C carbides were shown coherent with the ferrite matrix completely and have their own structure.展开更多
目的前列腺癌是影响老年男性健康的常见的恶性肿瘤,诊断及筛查方法的改进是提高前列腺癌患者预后的关键问题之一。本研究探讨血清前列腺健康指数(prostate health index,PHI)和尿液前列腺癌基因3(prostate cancer gene 3,PCA3)评分联合...目的前列腺癌是影响老年男性健康的常见的恶性肿瘤,诊断及筛查方法的改进是提高前列腺癌患者预后的关键问题之一。本研究探讨血清前列腺健康指数(prostate health index,PHI)和尿液前列腺癌基因3(prostate cancer gene 3,PCA3)评分联合检测在血清总PSA(total prostate specific antigen,tPSA)灰区(4~10ng/mL)前列腺癌患者中的诊断应用价值。方法收集福建医科大学附属南平市第一医院2015-06-01-2017-07-31经病理确诊的103例tPSA灰区患者的临床资料。其中前列腺癌组29例,前列腺良性增生(benign prostatic hyperplasia,BPH)组74例。检测tPSA、游离PSA(free PSA,fPSA)、前列腺特异性抗原前体(p2PSA)和尿液PCA3基因表达,分别计算PHI及尿PCA3评分,并以前列腺穿刺活检作为前列腺癌确诊依据,建立PHI及尿PCA3评分的受试者工作特征(receiver operating characteristic,ROC)曲线,分析PHI及尿PCA3评分单独检测及联合检测对前列腺癌患者早期诊断的应用价值。结果前列腺癌组与BPH组患者年龄(t=0.616,P=0.539)、血清tPSA(t=1.367,P=0.175)和P2PSA(t=1.255,P=0.212)水平差异无统计学意义;血清PHI(t=3.889,P<0.001)、尿PCA3评分(t值=4.175,P<0.001)、fPSA(t=-2.015,P=0.047)及前列腺体积(t=-3.875,P=0.002)差异有统计学意义,P>0.05。血清PHI及尿PCA3评分检测的AUC值显著高于血清tPSA,差异有统计学意义(P<0.05),两者联合检测的AUC值高于两者单独检测,但差异无统计学意义,P>0.05。结论 PHI及尿PCA3评分均可以作为前列腺癌诊断特异性肿瘤标志物,但两者联合检测并无协同作用。展开更多
文摘针对微流控芯片免疫荧光检测中LED光源不稳定导致检测区和质检区荧光采集同步实时性较差的问题,提出了一种基于光源漂移特性的自适应补偿方法。通过分析光源呈负指数形式衰减的漂移特性,引入光源时变补偿因子,对光源进行自适应补偿,实现微流控芯片高精度、高稳定性检测。对比实验结果表明光源时变补偿因子具有自适应性,且经过补偿后,免疫荧光检测的分辨率达到0.01ng/mL,CV值(离散系数,coefficient of variation)提高约50%,验证了其应用可行性。
基金Item Sponsored by Scientific and Technological Brainstorm Project for Ninth Five-Year Plan of China(98280102)
文摘The ultra strength alloy steel with high content of Co and Ni is typical tempering martensite steel, and the secondary hardening is accomplished by the precipitation of fine scale alloy carbides with black white contrast until peak hardening. The crystal structure of precipitates was well determined as M 2C with hexagonal by micro beam diffraction. Observing in HREM, M 2C carbides were shown coherent with the ferrite matrix completely and have their own structure.
文摘目的前列腺癌是影响老年男性健康的常见的恶性肿瘤,诊断及筛查方法的改进是提高前列腺癌患者预后的关键问题之一。本研究探讨血清前列腺健康指数(prostate health index,PHI)和尿液前列腺癌基因3(prostate cancer gene 3,PCA3)评分联合检测在血清总PSA(total prostate specific antigen,tPSA)灰区(4~10ng/mL)前列腺癌患者中的诊断应用价值。方法收集福建医科大学附属南平市第一医院2015-06-01-2017-07-31经病理确诊的103例tPSA灰区患者的临床资料。其中前列腺癌组29例,前列腺良性增生(benign prostatic hyperplasia,BPH)组74例。检测tPSA、游离PSA(free PSA,fPSA)、前列腺特异性抗原前体(p2PSA)和尿液PCA3基因表达,分别计算PHI及尿PCA3评分,并以前列腺穿刺活检作为前列腺癌确诊依据,建立PHI及尿PCA3评分的受试者工作特征(receiver operating characteristic,ROC)曲线,分析PHI及尿PCA3评分单独检测及联合检测对前列腺癌患者早期诊断的应用价值。结果前列腺癌组与BPH组患者年龄(t=0.616,P=0.539)、血清tPSA(t=1.367,P=0.175)和P2PSA(t=1.255,P=0.212)水平差异无统计学意义;血清PHI(t=3.889,P<0.001)、尿PCA3评分(t值=4.175,P<0.001)、fPSA(t=-2.015,P=0.047)及前列腺体积(t=-3.875,P=0.002)差异有统计学意义,P>0.05。血清PHI及尿PCA3评分检测的AUC值显著高于血清tPSA,差异有统计学意义(P<0.05),两者联合检测的AUC值高于两者单独检测,但差异无统计学意义,P>0.05。结论 PHI及尿PCA3评分均可以作为前列腺癌诊断特异性肿瘤标志物,但两者联合检测并无协同作用。
