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灵敏度

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Grounded faults occur on transmission lines, may cause malfunction of currently available zero sequence directional element when zero sequence voltage can't meet the sensitive requirement.

输电线路发生接地故障时,可能因零序电压不满足灵敏度要求,而导致零序方向元件误动或者拒动。

Under the optimum conditions, the linear range of the method was 0-80 μg/L. The detection limit was 4.58×10^(-7) g /L.The catalytic reaction was the zeroth order one. The apparent activation energy and the reaction rate constant was found to be 96.04 kJ/mol and 3.61×10^(-3)/s, respectively. The sensitivity was increased by 3 times in the presence of surfactant.

在最佳实验条件下,方法线性范围为0~80μg/L,检出限为4.58×10^(-7)g/L;催化反应为动力学零级反应,表观活化能为96.04kJ/mol,反应速率常数为3.61×10^(-3)/s;反应在表面活性剂存在下,灵敏度提高3倍。

The method was proved to be simple,rapid,practical and highly sensitive.It is an efficient method for the quality control of acetoacetic ester.

本法简便,快速、实用,灵敏度高,可有效地用于乙酰乙酸乙酯的质量控制。

objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm~0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml~400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

摘要] 目的:用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。方法:采用固定相为二乙烯苯乙基乙烯苯型高分子多孔小球(直径为0.18 mm~0.25 mm),氮气为载气,用外标法测定乙酰乙酸乙酯中残留丙酮的含量。结果:该方法在丙酮浓度范围在25 μg/ml~400 μg/ml内呈良好的线性关系,响应曲线相关系数为0.996,平均回收率为96.8%。结论:本法简便,快速、实用,灵敏度高,可有效地用于乙酰乙酸乙酯的质量控制。

Result: This method allowed 500 fold enrichment of aconitine alkaloid.

结果:该法使乌头碱的检测灵敏度提高了500倍。

Because its acquirable number of detecting elements is larger, and because its theoretical detecting sensitivity is higher, thin films will be the new generation materials of pyrelectric detecting arrays that have attracted great interest of scientists.

而由薄膜制备的探测阵列更易得到超高探测单元数和理论探测灵敏度,而且其制备工艺与半导体工艺兼容,因此被作为新一代探测阵列受到各国科学家的高度重视。

In the two-site sandwich CLIA for TSH,two anti-TSH monoclonal antibodies were involved,one was coated on microwells and another was labeled with acridinium ester. The assay sensitivity is 0.01mlU/L. Intrassay and interassay coefficients of variation are 4.29-6.71 and 4.36-6.14%,respectively. Average recovery is 98%.

以 DMAE·NHS为发光标记物,研究建立了两种 TSH CLIA方法,均采用一步夹心免疫分析法,在第一种方法中一株抗TSH单克隆抗体包被微孔板,另一株标记DMAE·N'HS,方法的分析灵敏度为0.olmIUA,批内变异系数为 4.29巧。71%,批间变异系数为 4.36ed.14%,平均回收率为 98%,与 TSH IRMA法的相关方程为 Y-0.20+0.92X,相关系数为 0.993,与 Ciba Co讪ng TSH CLIA测量值的相关方程为 Y—0.16+0.92兄相关系数为 0.986。

Methods: We collected 121 of clinical isolates of Enterobacter, including 87 isolates Enterobacter cloacae, 34 isolates Enterobacter aerogenes, all of the isolates were detected by cefoxitin three-dimension test, drug resistance phenotypes estimation, cloxacillin disc synergy test and cloxacillin-potentiated disc diffusion test respectively to find high-level AmpC β-lactamase isolates, drug resistance phenotypes estimation were also used to detected high induction producing AmpC β-lactamases isolates, meanwhile, we took three-dimension test as standard method, and compared to other methods, then calculated the coincidence rates, sensitivities and specificities of them.

采用头孢西丁三维实验、纸片耐药表型推断法、邻氯西林纸片协同法、双纸片邻氯西林增效试验分别检测高产AmpCβ-内酰胺酶株,获得高产AmpC酶在肠杆菌属细菌中的表达状况。采用纸片耐药表型推断法检测诱导和高产AmpC酶,同时以头孢西丁三维实验为标准,其他三种方法与之相比较,分析它们检测高产AmpC酶的符合率、灵敏度和特异性。

The dyn amic characteristic model is bui lt and the simulation is made by using GA based neural network.

用基于遗传算法的神经网络对滑觉传感器的动态性能进行了建摸和仿真,从传感器应用的角度出发,依据&逆模型&思想,采用神经网络对传感器建立辨识模型,从而提高了机械手的控制精度和灵敏度

The detectable group, biotin-ε-aminocaproic acid N-hydroxysuccinimide ester, is attached to the remaining amino group. A series of multiamine compouds, i. e. ethylendiamine, 1, 6-hexandediamine, triethylenetetramine, tetraethylenepentamine, and synthetic polyarylamide are used inlabelling, it is found that linker arms and steric hindrance effect the detection sensitivity. The probes labeled by 1, 6-hexandediamine and triethylenetetramine can detect 0.1-0.5pg target DNA in dot blot hybridization, and their sensitivities are better than the others.

本文详细考察了乙二胺、己二胺、二乙烯三胺、三乙烯四胺、四乙烯五胺及合成的聚乙烯胺化合物对λDNA探针的标记和检测的影响,发现胺化物链长和空间位阻影响探针的杂交和检测,用己二胺和三乙烯四胺标记的生物素探针在杂交24小时、显色8小时后检测灵敏度达0.1-0.5pg,超过其它胺化物标记的探针。

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