Valles J M, Lin K, Denegre J M, Mowry K L
Department of Physics, Brown University, Providence, Rhode Island 02912, USA.
Biophys J. 1997 Aug;73(2):1130-3. doi: 10.1016/S0006-3495(97)78145-1.
We have levitated, for the first time, living biological specimens, embryos of the frog Xenopus laevis, using a large inhomogeneous magnetic field. The magnetic field/field gradient product required for levitation was 1430 kG2/cm, consistent with the embryo's susceptibility being dominated by the diamagnetism of water and protein. We show that unlike any other earth-based technique, magnetic field gradient levitation of embryos reduces the body forces and gravity-induced stresses on them. We discuss the use of large inhomogeneous magnetic fields as a probe for gravitationally sensitive phenomena in biological specimens.
我们首次利用一个大型非均匀磁场使活体生物样本——非洲爪蟾胚胎悬浮起来。悬浮所需的磁场/场梯度乘积为1430 kG2/cm，这与胚胎的磁化率主要由水和蛋白质的抗磁性决定相一致。我们表明，与任何其他地面技术不同，胚胎的磁场梯度悬浮降低了作用在它们身上的体力和重力引起的应力。我们讨论了使用大型非均匀磁场作为探测生物样本中对重力敏感现象的一种手段。
