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滚动轴承专用标准件定位测量与非定位测量的误差分析
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作者 郭彩 《计量与测试技术》 1996年第6期5-8,共4页
本文以实例进行误差分析,把定位测量与非定位测量进行比较,定位测量比非定位测量提高量值传递的精度(在测量标准件时,在标准件上同时注上尺寸偏差和定位标记。
关键词 定位测量 非定位测量 误差 滚动轴承
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Using a non-radioisotopic, quantitative TRAP-based method detecting telomerase activities in human hepatoma cells 被引量:8
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作者 ZHANG RU GANG XING WANG WANG +2 位作者 JIN HUI YUAN LI XIA GUO HONG XIE (Shanghai Institute of Cell Biology, Chinese Academy of Sciences, Shanghai 200031, China) 《Cell Research》 SCIE CAS CSCD 2000年第1期71-77,共7页
A non-radioisotopic, quantitative TRAP-based telomerase activity assay was established mainly by using SYBR Green-I staining instead of radioisotope. Comparing with conventional radioisotope based method, it was bette... A non-radioisotopic, quantitative TRAP-based telomerase activity assay was established mainly by using SYBR Green-I staining instead of radioisotope. Comparing with conventional radioisotope based method, it was better in reproducibility and accuracy. Using this method, we found telomerase activities were absent in normal human liver cells, while detected in ail of four human hepatoma cell lines (BEL-7404, SMMC-7721, QGY-7903 and HCCM) without significant differences. 展开更多
关键词 TELOMERASE non-radioisotopic telomerase assay human liver cells human hepatoma cells.
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