Results 51 to 60 of about 1,460 (102)

重庆梁滩河表层沉积物氮形态时空特征及影响因素

Shuitu Baochi Xuebao, 2019
为研究流域快速城市化背景下浅水河流表层沉积物氮赋存形态时空格局特征及潜在环境风险，选择重庆主城区的梁滩河为研究对象，于2014年12月和2015年6月采集干、支流主要断面水样及表层沉积物样进行分析。结果表明：梁滩河干、支流表层沉积物总氮（TN）含量变化为2.63~8.12 g/kg，离子交换态氮（IEF-N）、弱酸可提取态氮（WAEF-N）、强碱可提取态氮（SAEF-N）和强氧化剂可提取态氮（SOEF-N）含量分别为190~1 764，119~1 139，208~2 039，159~2 829 mg ...
刘欢, 孔维苇, 王晓锋, 袁兴中, 龚小杰, 刘婷婷   +5 more
doaj  

不同运行年限复合绝缘子表面护套特性的研究

Gaoya dianqi, 2012
随着复合绝缘子运行年限的增长,有机材料的复合绝缘子会发生不可逆转的老化。伴随绝缘材料自身的性能的恶化,有可能影响电力系统的安全在线运行。为了进一步积累复合绝缘子安全运行的相关经验,特对可能存在安全隐患的110 kV叶氮清线及110 kV白氮线中不同运行年限的绝缘子共摘取3只进行抽检,研究不同运行年限后的复合绝缘子表面特性,对其进行了一系列的试验。研究内容包括绝缘子表面不同部位的憎水性分布、通过扫描电镜来分析绝缘子表面的污秽特征,以及通过离子成分分析,研究了污秽成分。试验研究表明 ...
彭银波, 李轩, 陈嘉, 全朝春
doaj  

[Determination of 26 herbicide residues in soil， sediment， and surface water samples using modified QuEChERS method combined with ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Zhao L, Ma L, Huang LQ, Chen JB, Zhu WF.
europepmc   +1 more source

[Exposures to volatile organic compounds are positively correlated with risks of metabolic dysfunction-associated steatotic liver disease]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Li K, Zeng W, Zhang Y, Zhu X, Guo B.
europepmc   +1 more source

[Application of cell transfer technology in pathological diagnosis of micro-volume cell fluid]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao Y, Diao X, Xiong Y.
europepmc   +1 more source

[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]

Se Pu
Li YJ.
europepmc   +1 more source

[Research progress in the application of molecular imprinting technology in catalysis]. [PDF]

Se Pu
Ye WM, He DC, Cui XJ, Ma HW, Qian B, Shi F.   +5 more
europepmc   +1 more source

[Fabrication of high-degradation-efficiency molecularly imprinted photocatalysts and its selective degradation performance]. [PDF]

Se Pu
Zhang JJ, Song YF, Liu Y, Tian XM, Gao RX.   +4 more
europepmc   +1 more source

[Determination of eight per- and polyfluoroalkyl substances in seawater using dispersive membrane extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Ren Z, Ma JP, Liu YJ, Zhang L, Wu GG, Li S.   +5 more
europepmc   +1 more source

[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source