Development of new separation methods of materials with strong magnetic fields

科学史表明，物质分离是科学研究的重要目标之一。本研究开发了利用强磁场分离材料的新方法。实现了氢同位素的高效分离、高分辨率DNA电泳和生物物质的抗磁分离。此外，我们还开发了能够产生高磁力的新型磁体，用于各种材料的磁分离。(1)研究了磁场对金属氢化物与氢同位素分离能力的影响。氘气相中的浓度增加而提高贮氢反应后应用磁场对铁磁LaCos,但不是顺LaNis。(2)在高达12T的磁场作用下进行DNA电泳。DNA分子的电泳速度在很大程度上取决于它们的大小和粘性（线状或圆形）以及磁场强度。这导致了高分辨率的DNA，可以区分大小和结构上的微小差异。(3)磁力取决于靶物质及其周围物质对磁性阿基米德效应的敏感性。这种效果适用于分离弱磁性材料，如生物和环境物质。实际上，我们可以清楚地分离出几种胶原蛋白。磁分离是一种对生物系统无创的方法。(4)氮的加入，首次发现了新的磁性机制。利用感应磁偶极相互作用对弱磁粒子进行结构控制是可能的。在水溶液中观察到单个顺磁离子的磁力诱导迁移（磁迁移）。(5)采用高温超导体筒增强磁力。例如，磁场B（dB/dz）从564T2/m增加到1029T2/m。少

The history of science has shown that materials separation is one of the most important targets in science. In this study, new methods for materials separation were developed by using strong magnetic fields. As a result, we realized a highly efficient separation of hydrogen isotope, a high-resolution DNA electrophoresis and a diamagnetic separation of biological substances. Moreover, we developed new magnets which were able to produce high magnetic forces for magnetic separation of various materials.(1) The influence of magnetic fields was investigated on the ability of hydrogen isotope separation with metal hydrides. The deuterium concentration in the gas phase after hydrogen-absorbing reactions was increased with increasing applied magnetic fields for ferromagnetic LaCos, but not for paramagnetic LaNis. (2) The electrophoresis of DNA's was performed under the influence of magnetic fields up to 12T. The electrophoreic velocity of DNA molecules strongly depended on their size and stric … More ture (linear of circular) as well as the magnetic field strength. This leads to a high-resolution of DNA which can distinguish small differences in size and structure. (3) The magnetic force depends on the susceptibility of the target substance as well as that of its ambient substance by the magnetic Archimedes effect. This effect is applicable to separate weakly magnetic materials, such as biological and environmental substances. Actually, we can separate several kinds of collagens clearly. The magnetic separation is non-invasive method to biological systems. (4)Tn addition, new magnetic mechanisms have been found during our study for the first time. The control of structure is possible for feeble magnetic particles by utilizing induced magnetic dipole interaction. The magnetic force-induced migration (magnetomigration) of a single paramagnetic ion was observed in the aqueous solution. (5) We enhanced the magnetic force by using a high temperature superconducting bulk cylinder. For instance, the magnetic force field B(dB/dz) increased from 564T2/m to 1029T2/m. Less