Piruzyan L A, Kuznetsov A A, Chikov V M
Biol Bull Acad Sci USSR. 1980 Sep-Oct;7(5):323-30.
In biological systems nonuniformity of magnetic susceptibility, magnetic heterogeneity, is a reflection of their physical-chemical and morphological heterogeneity, A characteristic value of heterogeneity is delta K approximately 10(-6)-10(-7) CGS units, a quantitative measurement of susceptibility of cells and other small objects, may give qualitatively new information about their life processes. Patterns and features of movement of small biological objects and liquids affected by magnetic forces were studied. A method was developed for measuring magnetic susceptibility of single microobjects based on observation of movement of the objects in a strong heterogeneous field with parameters (formula: see text) grad H2/2 approximately 10(9)-10(10) Oe2/cm. This method does not require knowing the distribution of the field along the path of movement of the particles, and does not require preliminary calibration. Movement of human erythrocytes, rat hepatocytes, and starch granules in liquids at a point of entry into a gap with the field was observed experimentally. With sufficiently large fields Ho approximately (1-2) x 10(4) Oe, the value of the magnetic force was enough to change the rate of sedimentation movement of the objects appreciably (up to stopping it). This made it possible to compute the value delta K for cells approximately 10(-7)-10(-8) CGS units and to obtain the value of K for starch granules (-0.80 x 10(-6) cGS units). In connection with the fact that sensitivity to gravity in plants is coupled with a disturbance of the intracellular starch granules under the influence of gravity, certain problems of stimulating the effect of gravity on plants by magnetic forces were studied. Noncontact force effect on magnetically heterogeneous biological objects is a promising instrument for biophysical studies.
在生物系统中，磁化率的不均匀性，即磁非均匀性，反映了它们的物理化学和形态学非均匀性。非均匀性的一个特征值是δK约为10^(-6)-10^(-7)厘米克秒制单位，对细胞和其他小物体磁化率的定量测量可能会给出有关其生命过程的定性新信息。研究了受磁力影响的小生物物体和液体的运动模式和特征。基于观察物体在强非均匀场中运动而开发了一种测量单个微物体磁化率的方法，该场的参数（公式：见文本）grad H2/2约为10^(9)-10^(10)奥斯特^2/厘米。该方法不需要知道沿粒子运动路径的场分布，也不需要预先校准。通过实验观察了人红细胞、大鼠肝细胞和淀粉颗粒在液体中进入与场的间隙处的运动。在足够大的场强Ho约为(1-2)×10^(4)奥斯特时，磁力的值足以显著改变物体的沉降运动速率（直至使其停止）。这使得可以计算细胞的δK值约为10^(-7)-10^(-8)厘米克秒制单位，并获得淀粉颗粒的K值（-0.80×10^(-6)厘米克秒制单位）。鉴于植物对重力的敏感性与重力影响下细胞内淀粉颗粒的扰动有关，研究了通过磁力刺激重力对植物影响的某些问题。对磁非均匀生物物体的非接触力效应是生物物理研究的一种有前途的手段。
