The interactions of p-dimethylaminobenzaldehyde(p-DAB) and potassium hydrogen sulphate(PHS) in equimolar ratio with various concentration of diphenylamine(solid test material) have been investigated by capillary spot-...The interactions of p-dimethylaminobenzaldehyde(p-DAB) and potassium hydrogen sulphate(PHS) in equimolar ratio with various concentration of diphenylamine(solid test material) have been investigated by capillary spot-tests technique in order to investigate the effect of temperature and volume of material in test-tube.The formation of the colored boundary in the capillary is taken for the detection of organic compounds by spot-tests at different temperature and volume of solid test material.展开更多
In this paper, ultrasonic C-scan test of spot welds for stainless steel has been studied. It is concluded that large scanning step length contributes to high testing efficiency, however, the low-resolution C-scan imag...In this paper, ultrasonic C-scan test of spot welds for stainless steel has been studied. It is concluded that large scanning step length contributes to high testing efficiency, however, the low-resolution C-scan image generated cannot be used to assess spot welding quality reliably. Based on bicubic image interpolation, the C-scan image in low resolution with the large step length 1 000 ~xm is subdivided and reconstructed. By this means, the C-scan image resolution is greatly enhanced and testing results obtained are satisfactory, realizing rapid assessment of spot welds. The results of rapid ultrasonic C-scan test fit the actual metallographic measured value well. Mean value of normal distribution of error statistics is O. 006 67, and the standard deviation is O. 087 11. Rapid ultrasonic C-scan test based on image interpolation is of high accuracy and excellent stability.展开更多
目的探讨γ干扰素释放分析结核感染T细胞斑点试验(Tuberculous infection of T cells spot test,T-SPOT.TB)在成年人肺结核诊断中的意义。方法对2011年3-12月在南京医科大学附属杭州市第一人民医院住院治疗的74例成年人疑似肺结核患者...目的探讨γ干扰素释放分析结核感染T细胞斑点试验(Tuberculous infection of T cells spot test,T-SPOT.TB)在成年人肺结核诊断中的意义。方法对2011年3-12月在南京医科大学附属杭州市第一人民医院住院治疗的74例成年人疑似肺结核患者进行外周血T-SPOT.TB检测,其结果与最终诊断相比较,并与结核菌素试验(芒图试验,PPD)进行对比。结果 T-SPOT.TB灵敏度为93.5%,特异度为92.1%。在确诊结核病组中,T-SPOT.TB阳性率显著高于PPD试验(45.2%),差异有统计学意义(P<0.05)。结论 T-SPOT.TB检测对成年人肺结核诊断有高度的敏感性和特异性,值得临床推广。展开更多
文摘The interactions of p-dimethylaminobenzaldehyde(p-DAB) and potassium hydrogen sulphate(PHS) in equimolar ratio with various concentration of diphenylamine(solid test material) have been investigated by capillary spot-tests technique in order to investigate the effect of temperature and volume of material in test-tube.The formation of the colored boundary in the capillary is taken for the detection of organic compounds by spot-tests at different temperature and volume of solid test material.
文摘In this paper, ultrasonic C-scan test of spot welds for stainless steel has been studied. It is concluded that large scanning step length contributes to high testing efficiency, however, the low-resolution C-scan image generated cannot be used to assess spot welding quality reliably. Based on bicubic image interpolation, the C-scan image in low resolution with the large step length 1 000 ~xm is subdivided and reconstructed. By this means, the C-scan image resolution is greatly enhanced and testing results obtained are satisfactory, realizing rapid assessment of spot welds. The results of rapid ultrasonic C-scan test fit the actual metallographic measured value well. Mean value of normal distribution of error statistics is O. 006 67, and the standard deviation is O. 087 11. Rapid ultrasonic C-scan test based on image interpolation is of high accuracy and excellent stability.
文摘目的探讨γ干扰素释放分析结核感染T细胞斑点试验(Tuberculous infection of T cells spot test,T-SPOT.TB)在成年人肺结核诊断中的意义。方法对2011年3-12月在南京医科大学附属杭州市第一人民医院住院治疗的74例成年人疑似肺结核患者进行外周血T-SPOT.TB检测,其结果与最终诊断相比较,并与结核菌素试验(芒图试验,PPD)进行对比。结果 T-SPOT.TB灵敏度为93.5%,特异度为92.1%。在确诊结核病组中,T-SPOT.TB阳性率显著高于PPD试验(45.2%),差异有统计学意义(P<0.05)。结论 T-SPOT.TB检测对成年人肺结核诊断有高度的敏感性和特异性,值得临床推广。
