Effects of Magnetic Fields on Biological and Chemical Processes

磁场对生物和化学过程的影响

• 批准号: 63460113
• 负责人: UENO Shoogo
• 金额: $ 4.67万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460113/
• 关键词: Effect of magnetic field; Magnetic curtain; Biomagnetics; Magnetic orientation; Combustion reaction; Magnetic stimulation; Stimulation of brain; Stimulation of spinal roots; 強磁場; バイオマグネティックス; 磁気カーテン; 燃焼; ガス流; 発光スペクトル; ラジカル対

1. The Effect of Magnetic Fields on Combustion and Gas FlowWe have observed that combustion and gas flow in the air are influenced by magnetic field gradient in the range of 50-100T/m under 1-2T. We have introduced a model of a "magnetic curtain" to explain these phenomena. It is assumed that the magnetic curtain is an "air curtain" which is formed by magnetic fields. We simulated the gas flow near magnetic curtain, introducing a technique of molecular dynamics. We applied this phenomenon to magnetic separation of fine particle dust in the air and to the control of heat transport in heat pipes.2. Nerve Stimulation by Pulsed Magnetic FieldsWe proposed a new method of localized nerve stimulation by a pair of opposing pulsed magnetic fields. Magnetic stimulation of the human motor cortex was realized with a 5 mm resolution. The basic idea is to concentrate induced eddy currents locally in the vicinity of a target by a pair of opposing pulsed magnetic fields. Using this method, the functional mapping of the motor cortex was obtained. We also observed that the functional mapping of the motor cortex was changed with the direction of induced eddy current flow.3. Biological Effects of Intense Magnetic FieldsThe possible influence of intense magnetic fields up to 6.34T on the early embryonic development of Xenopus laevis was studied. The magnetic fields up to 6.34T did not affect appreciably the rapid cleavage and the following cell multiplication and differentiation in Xenopus laevis.

1.磁场对燃烧和气体流动的影响我们观察到，在1- 2 T下，在50- 100 T/m的磁场梯度范围内，空气中的燃烧和气体流动都受到磁场梯度的影响。我们引入了一个“磁幕”模型来解释这些现象。假设磁帘是由磁场形成的“空气帘”。采用分子动力学方法模拟了磁幕附近的气体流动.我们将这一现象应用于空气中细颗粒粉尘的磁分离和热管传热的控制.脉冲磁场神经刺激我们提出了一种利用一对反向脉冲磁场进行局部神经刺激的新方法。以5 mm的分辨率实现了对人类运动皮质的磁刺激。其基本思想是通过一对相反的脉冲磁场将感应涡电流局部集中在目标附近。利用这种方法，获得了运动皮层的功能映射。我们还观察到运动皮层的功能映射随着感应涡流方向的改变而改变.强磁场的生物学效应研究了高达6.34T的强磁场对非洲爪蟾早期胚胎发育的可能影响。高达6.34T的磁场对非洲爪蟾的快速卵裂及随后的细胞增殖和分化没有明显影响。

项目成果

S.Ueno,M.Iwasaka: "Properties of Magnetic Curtain Produced by Magnetic Fields" J.Appl.Phys.67. 5901-5903 (1990)

S.Ueno，M.Iwasaka：“磁场产生的磁幕的特性”J.Appl.Phys.67。

Y.Fu,K.Hosokawa,K.Shiokawa: "Expression of circular and linearized bacterial chloramphenicol acetyltransferase genes with or without viral promoters after injection into fertilized eggs, unfertilized eggs and oocytes of Xenopus laevis" Roux's Arch Dev Bio

Y.Fu、K.Hosokawa、K.Shiokawa：“注射到非洲爪蟾受精卵、未受精卵和卵母细胞后，环状和线性细菌氯霉素乙酰转移酶基因（有或没有病毒启动子）的表达”Roux 的 Arch Dev Bio

S.Ueno,Matsuda,O.Hiwaki: "Localized Stimulation of the Human Brain and Spinal Cord by a Pair of Opposing Pulsed Magnetic Fields" J.Appl.Phys.67. 5838-5840 (1990)

S.Ueno、Matsuda、O.Hiwaki：“一对相反的脉冲磁场对人脑和脊髓的局部刺激”J.Appl.Phys.67。

S. Ueno, T. Matsuda, M. Fujiiki: ""Localized Stimulation of the Human Brain by a Pair of Opposing Pulsed Magnetic Fields. "" Mem. Fac. Eng. Kyushu Univ.Vol. 49, No3. 161-173 (1989)

S. Ueno、T. Matsuda、M. Fujiiki：“一对相反的脉冲磁场对人脑的局部刺激。

S.Ueno: "Properties of magnetic curtain produced by magnetic fields." Journal of Applied Physics. 66. (1990)

S.Ueno：“磁场产生的磁幕的特性。”