Electric fields induced by ring and pin electrodes in electrostatic charged powder sprayingtechnique are analysed. The fundamental formulae to deseribe these fields have been built up. Theseformulae could be used to d...Electric fields induced by ring and pin electrodes in electrostatic charged powder sprayingtechnique are analysed. The fundamental formulae to deseribe these fields have been built up. Theseformulae could be used to design electrostatic charged podwer spraying system. The chargingeffectiveness of ring and pin electrode is experimentally investigated and compared each other. Theperformance of ring electrode is better than that of pin electrode.展开更多
The dispersion of ultrafine particles in the air can be achieved by mechanical method or surface modification. In this work, the electrostatic technique was first employed for anti-aggregation of ultrafine particles. ...The dispersion of ultrafine particles in the air can be achieved by mechanical method or surface modification. In this work, the electrostatic technique was first employed for anti-aggregation of ultrafine particles. When the relative humidity of the air is within the region of 70%-75%, effective storage time of ultrafine particles can reach 72 h after treatment by the electrostatic technique. The experimental results showed that this technique imparted ultrafine particles much more pronounced anti-aggregation property. In the dry air, the critical diameter of ultrafine particles anti-aggregated by the electrostatic technique is the function of particle property and charging field intensity. The critical diameter is inversely proportional to the square of the charging field intensity.展开更多
用微相吸附-光谱修正（MPASC）新技术研究核酸与多色蓝（PCB）探针分子间的相互作用,分析核酸分子内双静电膜的形成与 Langmuir吸附的关联性.通过pH 7.24的介质核酸-PCB反应的光谱研究,测定了结合产物的物理化学参数:结合比IPCB:2DNA-PC...用微相吸附-光谱修正（MPASC）新技术研究核酸与多色蓝（PCB）探针分子间的相互作用,分析核酸分子内双静电膜的形成与 Langmuir吸附的关联性.通过pH 7.24的介质核酸-PCB反应的光谱研究,测定了结合产物的物理化学参数:结合比IPCB:2DNA-PCB、IPCB:3RNA-PCB,平衡常数KDNA-PCB=5.42 X 104,KRNA-PCB=2.82 x 104,摩尔吸收系数ε（DNA-PCB,625nm）=5.65x103（mol-1·L）·cm-1,ε（RNA-PCB,625nm）=3.85x103（mol-1·L）·cm-1结果表明,RNA分子仅形成约60％双螺旋结构链,核酸双螺旋每一周期的负静电沟最大聚集10个PCB分子.该吸附反应用于核酸样品测定,结果良好.展开更多
对双铟封工艺应用于全静电摄像管中所存在的问题进行了讨论,并利用光电子能谱仪(ESCA)和扫描电子显微镜(SEM)对抛光的玻璃铟封表面经过不同的清洗工艺后的表面状态和形貌进行了测试分析,所得结果为寻找最佳工艺条件提供了依据。通过大...对双铟封工艺应用于全静电摄像管中所存在的问题进行了讨论,并利用光电子能谱仪(ESCA)和扫描电子显微镜(SEM)对抛光的玻璃铟封表面经过不同的清洗工艺后的表面状态和形貌进行了测试分析,所得结果为寻找最佳工艺条件提供了依据。通过大量的工艺实验,采用双铟封工艺制作出中心分辨率为450TVL 的1.7 cm 全静电摄像管。展开更多
文摘Electric fields induced by ring and pin electrodes in electrostatic charged powder sprayingtechnique are analysed. The fundamental formulae to deseribe these fields have been built up. Theseformulae could be used to design electrostatic charged podwer spraying system. The chargingeffectiveness of ring and pin electrode is experimentally investigated and compared each other. Theperformance of ring electrode is better than that of pin electrode.
基金This work was supported by the National Natural Science Foundation of China (Grant No. 59574031).
文摘The dispersion of ultrafine particles in the air can be achieved by mechanical method or surface modification. In this work, the electrostatic technique was first employed for anti-aggregation of ultrafine particles. When the relative humidity of the air is within the region of 70%-75%, effective storage time of ultrafine particles can reach 72 h after treatment by the electrostatic technique. The experimental results showed that this technique imparted ultrafine particles much more pronounced anti-aggregation property. In the dry air, the critical diameter of ultrafine particles anti-aggregated by the electrostatic technique is the function of particle property and charging field intensity. The critical diameter is inversely proportional to the square of the charging field intensity.
文摘用微相吸附-光谱修正（MPASC）新技术研究核酸与多色蓝（PCB）探针分子间的相互作用,分析核酸分子内双静电膜的形成与 Langmuir吸附的关联性.通过pH 7.24的介质核酸-PCB反应的光谱研究,测定了结合产物的物理化学参数:结合比IPCB:2DNA-PCB、IPCB:3RNA-PCB,平衡常数KDNA-PCB=5.42 X 104,KRNA-PCB=2.82 x 104,摩尔吸收系数ε（DNA-PCB,625nm）=5.65x103（mol-1·L）·cm-1,ε（RNA-PCB,625nm）=3.85x103（mol-1·L）·cm-1结果表明,RNA分子仅形成约60％双螺旋结构链,核酸双螺旋每一周期的负静电沟最大聚集10个PCB分子.该吸附反应用于核酸样品测定,结果良好.
文摘对双铟封工艺应用于全静电摄像管中所存在的问题进行了讨论,并利用光电子能谱仪(ESCA)和扫描电子显微镜(SEM)对抛光的玻璃铟封表面经过不同的清洗工艺后的表面状态和形貌进行了测试分析,所得结果为寻找最佳工艺条件提供了依据。通过大量的工艺实验,采用双铟封工艺制作出中心分辨率为450TVL 的1.7 cm 全静电摄像管。
