在分析饱和铁芯型高温超导故障限流器(Saturated iron-core superconducting fault current limiter,SISFCL)基本结构的基础上,建立由44个双饼组成的单螺管型超导绕组的限流器三维模型;利用三维有限元方法(Finite element method,FEM)...在分析饱和铁芯型高温超导故障限流器(Saturated iron-core superconducting fault current limiter,SISFCL)基本结构的基础上,建立由44个双饼组成的单螺管型超导绕组的限流器三维模型;利用三维有限元方法(Finite element method,FEM)计算限流器漏磁感应强度的大小和方向,得到了漏磁的分布特点;采用磁场分割的方法建立了考虑漏磁影响的SISFCL等效磁路模型;最后将仿真计算结果与实测结果进行对比,验证了所建立的等效磁路模型的有效性。展开更多
The morphology characteristics of cell apoptosis of the malignant tumour cells in magnetic field-treated mouse was observed for the first time. The apoptotic cancer cell contracted, became rounder and divorced from ad...The morphology characteristics of cell apoptosis of the malignant tumour cells in magnetic field-treated mouse was observed for the first time. The apoptotic cancer cell contracted, became rounder and divorced from adjacent cells; the heterochromatin condensed and coagulated together along the inner side of the nuclear membrane; the endoplasmic reticulums(ER) expanded and fused with the cellular membrane; many apoptotic bodies which were packed by the cellular membrane appeared and were devoured by some lymphocytes and plasma. Apoptosis of cancer cells was detected by terminal deoxynucleotidyl transferase mediated in situ nick end labeling(TUNEL). It was found that the number of apoptosis cancer cells of the sample treated by the magnetic field is more than that of the control sample. The growth of malignant tumour in mice was inhibited and the ability of immune cell to dissolve cancer cells was improved by ultralow frequency(ULF) pulsed gradient magnetic field; the nuclei DNA contents decreased, indicating that magnetic field can block DNA replication and inhibit mitosis of cancer cells. It was suggested that magnetic field could inhibit the metabolism of cancer cell, lower its malignancy, and restrain its rapid and heteromorphic growth. Since ULF pulsed gradient magnetic field can induce apoptosis of cancer cells and inhibit the growth of malignant tumour, it could be used as a new method to treat cancer.展开更多
文摘在分析饱和铁芯型高温超导故障限流器(Saturated iron-core superconducting fault current limiter,SISFCL)基本结构的基础上,建立由44个双饼组成的单螺管型超导绕组的限流器三维模型;利用三维有限元方法(Finite element method,FEM)计算限流器漏磁感应强度的大小和方向,得到了漏磁的分布特点;采用磁场分割的方法建立了考虑漏磁影响的SISFCL等效磁路模型;最后将仿真计算结果与实测结果进行对比,验证了所建立的等效磁路模型的有效性。
基金The authors thank Prof. Li Tongping of the Pathological Unit of Fundamental Medical School,Tongji Medical University for his kind instruction and help. This work was supported by the National Natural Science Foundation of China(Grant No. 39870823) and
文摘The morphology characteristics of cell apoptosis of the malignant tumour cells in magnetic field-treated mouse was observed for the first time. The apoptotic cancer cell contracted, became rounder and divorced from adjacent cells; the heterochromatin condensed and coagulated together along the inner side of the nuclear membrane; the endoplasmic reticulums(ER) expanded and fused with the cellular membrane; many apoptotic bodies which were packed by the cellular membrane appeared and were devoured by some lymphocytes and plasma. Apoptosis of cancer cells was detected by terminal deoxynucleotidyl transferase mediated in situ nick end labeling(TUNEL). It was found that the number of apoptosis cancer cells of the sample treated by the magnetic field is more than that of the control sample. The growth of malignant tumour in mice was inhibited and the ability of immune cell to dissolve cancer cells was improved by ultralow frequency(ULF) pulsed gradient magnetic field; the nuclei DNA contents decreased, indicating that magnetic field can block DNA replication and inhibit mitosis of cancer cells. It was suggested that magnetic field could inhibit the metabolism of cancer cell, lower its malignancy, and restrain its rapid and heteromorphic growth. Since ULF pulsed gradient magnetic field can induce apoptosis of cancer cells and inhibit the growth of malignant tumour, it could be used as a new method to treat cancer.
