Results 71 to 80 of about 7,759 (164)

东方铃蟾乳酸脱氢酶多态性研究

野生动物学报, 1995
采用聚丙烯酰胺凝胶电泳分离东方铃蟾不同组织ＬＤＨ同工酶，显示出典型的５条带谱。心肌具有以Ｂ亚基为主的ＬＤＨ同工酶谱，骨骼肌以Ａ亚基为主的ＬＤＨ同工酶谱。用改进后的聚丙烯酰胺凝胶电泳方法进行种群调查，结果表明Ａ位点和Ｂ位点都存在电泳上的变异，各存在二个等位基因。Ａ位点有三个基因型，其频率；ＡＡ＝５３．４７％．Ａａ＝３９．１１％．ａａ＝７．４３％；Ｂ位点只检出二个基因型，即ＢＢ为９９．５０％，Ｂｂ为０．５０％。
曾科文, 杨广涛, 陈凤英, 潘雪峰   +3 more
doaj  

基于光谱分析的电压互感器运行状态研判方法

Gaoya dianqi
以确保电力系统稳定运行为目的，研究基于光谱分析的电压互感器运行状态研判方法，提升运行状态研判效果。激光拉曼光谱检测平台依据拉曼散射原理，获取电压互感器绝缘油拉曼谱线强度，按照拉曼谱线强度，绘制电压互感器绝缘油拉曼光谱，完成电压互感器内绝缘油拉曼光谱数据采集；通过迭代多项式拟合算法，预处理电压互感器绝缘油拉曼光谱；利用主成分分析法在预处理的拉曼光谱内，提取电压互感器绝缘油拉曼谱线强度特征；利用核Fisher判别分析法，建立电压互感器运行状态研判模型，在该模型内输入拉曼谱线强度特征 ...
石小帅, 冯再均, 胡全贵, 王轩, 贺银志, 姚金男   +5 more
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两种血清苯丙氨酸高效液相色谱测定法的比较

Zhongguo shiyan zhenduanxue, 2005
目的对两种血清苯丙氨酸高效液相色谱测定法进行比较。方法对高效液相色谱-紫外检测法（HPLC-UV）和高效液相色谱-荧光检测法（HPLC-FLD）,从线性范围,检测限,精密度等参数上进行比较,用两种方法分别测定了正常儿童和一组PKU患儿血清phe值,对结果进行统计分析。结果HPLC-UV法和HPLC-FLD法的线性范围分别为61512μmol/L和121220μmol/L,最低检测限分别为0.75μmol/L和3μmol/L,平均回收率分别为98.6%和102.5 ...
唐爱国, 洪敏, 莫喜明, 陈若虹
doaj  

[Rapid determination of lubabegron residues in animal-derived foods by ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]

Se Pu
Yang C, Zhu WX, Liu YF, Zhang HW, Wei W, Hu K.   +5 more
europepmc   +1 more source

[Assessment on data processing methods for nontarget identification of per- and polyfluoroalkyl substances using liquid chromatography-high-resolution mass spectrometry]. [PDF]

Se Pu
Zhang BX, He QW, Han BC, Ma CD, Luo ZJ, Meng XZ.   +5 more
europepmc   +1 more source

[Determination of atmospheric intermediate volatility organic compounds with thermal desorption-flow modulator comprehensive two-dimensional gas chromatography- time-of-flight mass spectrometry]. [PDF]

Se Pu
Wang R, Li YJ, Wang JH, Ma CW, Jiang JK.
europepmc   +1 more source

[Determination of 65 synthetic cannabinoids in whole blood by QuEChERS-ultra performance liquid chromatography- mass spectrometry]. [PDF]

Se Pu
Xi Z, Ye Y, Li SP, Kang J, Liu WQ, Zhang J, Li DX.   +6 more
europepmc   +1 more source

[Determination of eight ultraviolet absorbers in surface water and wastewater by ultra performance liquid chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu
Sun HJ, Zhang BB, Huang MQ, Wang H, Hu GJ, Chen HM.   +5 more
europepmc   +1 more source

[Development of a machine learning-based ionization efficiency prediction model for per- and polyfluoroalkyl substances and its application in semi-quantitative analysis]. [PDF]

Se Pu
Sun SZ, Li YY, Gao Y, Li KC, Chen Z, Li XQ, Zhang QH.   +6 more
europepmc   +1 more source

[Safety study of resin-based dental materials using gas chromatography-mass spectrometry techniques]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li Y, Zeng Y, Du Z, Ren G.
europepmc   +1 more source