| 1. | Low background pulse counting assembly
低本底脉冲计数装置 |
| 2. | Verification regulation of low background alpha and or beta measuring instrument
低本底测量仪检定规程 |
| 3. | Detection of radioactivity in water with low background measuring system
对一台立体定向伽玛射线体部治疗装置的放射防护监测与评价 |
| 4. | 7 . the labeled sample was purified and hybridized with the self - made cdna microarray , which demonstrated low background and clear positive signals
7 、标记的样品纯化后与芯片杂交，获得的杂交结果背景低，阳性信号的界限清楚。 |
| 5. | By establishing the fuzzy set of the energy spectrum , the standard isotope library and the algorithm of fuzzy recognition , a quick automatic qualitative analysis was achieved , and the spectra of three mixed standard radiation sources and three samples of low background were analyzed
通过建立关于未知谱的模糊集合、标准核素库及模糊识别算法，实现了能谱的决速自动定性分析，并对3组混合标准源能谱和3个低本底样品能谱进行了定性分析。 |
| 6. | So , mfld provides a new way to obtain optical information for optical chemo - and biosensors . compared with conventional detection methods , in which the detector was placed at the distal end of the fiber , mfld has advantages in much higher singnal - to : noise ( s / n ) ratio and sensitivity , since the analyte signal is measured against a much lower background by placing the detector at the fiber - optic profile instead of the distal end
模式滤光检测和传统的检测方式相比，检测器的位置由光纤末端改放在光纤侧面，获取光纤侧面产生的模式滤光信号，由于光纤侧面的背景光远较光纤末端的出射光背景小，因而较之检测光纤末端的出射光有高得多的信噪比和灵敏度。 |
| 7. | 1 . boron - doped diamond ( bdd ) electrodes have recently attracted considerable interest , especially for electrochemical analysis due to its outstanding characteristics : ( 1 ) very low background current density ; ( 2 ) a wide potential window in aqueous solution ; ( 3 ) good activity toward some redox analytes without any pretreatment ; ( 4 ) long term response stability
1 .硼掺杂金刚石( bdd )电极具有较低的背景电流、无需作任何处理的情况下对一些氧化还原分析物有好的活性、高电化学稳定性、宽的电位窗口和长时间的响应稳定性等优点,研究了一些活性物质在bdd电极上的电化学性质。 |
