目的建立测定大批量血清样品中多种元素的检测方法。方法血清样品用1％硝酸稀释3倍后，应用动态反应池电感耦合等离子体质谱仪（inductively coupled plasma mass spectrometry,ICP—MS）同时测定铍（Be）、铝（Al）、锰（Mn）、钒（V...目的建立测定大批量血清样品中多种元素的检测方法。方法血清样品用1％硝酸稀释3倍后，应用动态反应池电感耦合等离子体质谱仪（inductively coupled plasma mass spectrometry,ICP—MS）同时测定铍（Be）、铝（Al）、锰（Mn）、钒（V）、铬（Cr）、铁（Fe）、钻（Co）、镍（Ni）、铜（Cu）、锌（Zn）、砷（As）、硒（Se）、钼（Mo）、银（Ag）、镉（cd）、锑（sb）、钡（Ba）、铊（T1）、铅（Pb）、钍（Th）、铀（U）共21种元素。结果各元素的检出限为0．001～0．071μg／L，线性相关系数r≥0．999，相对标准偏差〈5％，方法回收率为90％～114％。用Seronorm Trace Elements Serum L-1 LOT 0903106作标样质控，检测结果与标准值吻合。结论该方法简化了前处理过程，具有操作简单、快速、灵敏、准确等优点，完全可以满足测定要求。展开更多
Rotary near-field lithography(RNFL) technology provides a route to overcome the diffraction limit with a high throughput and low cost for nanomanufacturing. Utilizing the advantage of the passive flying of a plasmonic...Rotary near-field lithography(RNFL) technology provides a route to overcome the diffraction limit with a high throughput and low cost for nanomanufacturing. Utilizing the advantage of the passive flying of a plasmonic head, RNFL can achieve a 10 m/s processing speed with a perfect near-field condition at dozens of nanometers. The flying performance of the plasmonic flying head(PFH) is the pivotal issue in the system. The linewidth has a strong correlation with the near-field gap, and the manufacturing uniformity is directly influenced by the dynamic performance. A more serious issue is that the unexpected contact between the PFH and substrate will result in system failure. Therefore, it is important to model and analyze the flying process of the PFH at the system level. In this study, a novel full-coupled suspension-PFH-air-substrate(SPAS) model that integrates a six-degree of freedom suspension-PFH dynamics, PFH-air-substrate air bearing lubrication, and substrate vibration, is established. The pressure distribution of the air bearing is governed by the molecular gas lubrication equation that is solved by the finite element method(FEM) with a local pressure gradient based adaptive mesh refinement algorithm using the COMSOL Multiphysics software. Based on this model, three designs of the air bearing surface are chosen to study the static, dynamic, and load/unload performance to verify whether it satisfies the design requirements of RNFL. Finally, a PFH analysis solver SKLY.app is developed based on the proposed model.展开更多
This study presents observation and detailed analysis on the double layers （DLs） in the ramp and the foreshock contacting with the foot of the terrestrial bow shock by THEMIS on September 14, 2008 under enhanced dyn...This study presents observation and detailed analysis on the double layers （DLs） in the ramp and the foreshock contacting with the foot of the terrestrial bow shock by THEMIS on September 14, 2008 under enhanced dynamic pressure in the solar wind. The results reveal that： （1） The time duration of the double layers is nus 10-40 mV/m. （2） On assuming a propagation speed at the ion mainly 3-8 ms, and their max parallel electric field is miacoustic speed （vs）, their spatial scale is estimated to be 0.3-1.15 km （about 75-200 2D）. （3） The net potential drop of DLs is estimated to be 5-32 V. （4） The DLs in the ramp and the foreshock contacting to the foot of the bow shock is current-carrying as a result of development and evolution of nonlinear phase of instability in the self-consistent current-carrying plasma. The DLs may play an important role in strong turbulence in the foreshock contacting with the foot of the bow shock.展开更多
文摘目的建立测定大批量血清样品中多种元素的检测方法。方法血清样品用1％硝酸稀释3倍后，应用动态反应池电感耦合等离子体质谱仪（inductively coupled plasma mass spectrometry,ICP—MS）同时测定铍（Be）、铝（Al）、锰（Mn）、钒（V）、铬（Cr）、铁（Fe）、钻（Co）、镍（Ni）、铜（Cu）、锌（Zn）、砷（As）、硒（Se）、钼（Mo）、银（Ag）、镉（cd）、锑（sb）、钡（Ba）、铊（T1）、铅（Pb）、钍（Th）、铀（U）共21种元素。结果各元素的检出限为0．001～0．071μg／L，线性相关系数r≥0．999，相对标准偏差〈5％，方法回收率为90％～114％。用Seronorm Trace Elements Serum L-1 LOT 0903106作标样质控，检测结果与标准值吻合。结论该方法简化了前处理过程，具有操作简单、快速、灵敏、准确等优点，完全可以满足测定要求。
基金financially supported by the National Natural Science Foundation of China (NSFC) with Grant No. 51635009
文摘Rotary near-field lithography(RNFL) technology provides a route to overcome the diffraction limit with a high throughput and low cost for nanomanufacturing. Utilizing the advantage of the passive flying of a plasmonic head, RNFL can achieve a 10 m/s processing speed with a perfect near-field condition at dozens of nanometers. The flying performance of the plasmonic flying head(PFH) is the pivotal issue in the system. The linewidth has a strong correlation with the near-field gap, and the manufacturing uniformity is directly influenced by the dynamic performance. A more serious issue is that the unexpected contact between the PFH and substrate will result in system failure. Therefore, it is important to model and analyze the flying process of the PFH at the system level. In this study, a novel full-coupled suspension-PFH-air-substrate(SPAS) model that integrates a six-degree of freedom suspension-PFH dynamics, PFH-air-substrate air bearing lubrication, and substrate vibration, is established. The pressure distribution of the air bearing is governed by the molecular gas lubrication equation that is solved by the finite element method(FEM) with a local pressure gradient based adaptive mesh refinement algorithm using the COMSOL Multiphysics software. Based on this model, three designs of the air bearing surface are chosen to study the static, dynamic, and load/unload performance to verify whether it satisfies the design requirements of RNFL. Finally, a PFH analysis solver SKLY.app is developed based on the proposed model.
基金supported by the National Natural Science Foundation of China(Grant No.41304132)the 53-Class General Financial Grant from the China Postdoctoral Science Foundation(Grant No.2013M532115)
文摘This study presents observation and detailed analysis on the double layers （DLs） in the ramp and the foreshock contacting with the foot of the terrestrial bow shock by THEMIS on September 14, 2008 under enhanced dynamic pressure in the solar wind. The results reveal that： （1） The time duration of the double layers is nus 10-40 mV/m. （2） On assuming a propagation speed at the ion mainly 3-8 ms, and their max parallel electric field is miacoustic speed （vs）, their spatial scale is estimated to be 0.3-1.15 km （about 75-200 2D）. （3） The net potential drop of DLs is estimated to be 5-32 V. （4） The DLs in the ramp and the foreshock contacting to the foot of the bow shock is current-carrying as a result of development and evolution of nonlinear phase of instability in the self-consistent current-carrying plasma. The DLs may play an important role in strong turbulence in the foreshock contacting with the foot of the bow shock.
