Hochmuth R M, Worthy P R, Evans E A
Biophys J. 1979 Apr;26(1):101-14. doi: 10.1016/S0006-3495(79)85238-8.
A theory of membrane viscoelasticity developed by Evans and Hochmuth in 1976 is used to analyze the time-dependent recovery of an elongated cell. Before release, the elongated cell is the static equilibrium where external forces are balanced by membrane elastic force resultants. Upon release, the cell recovers its initial shape with a time-dependent exponential behavior characteristic of the viscoelastic solid model. It is shown that the model describes the time-dependent recovery process very well for a time constant in the range of 0.1-0.13 s. The time constant is the ratio membrane surface viscosity eta:membrane surface elasticity mu. Measurements for the shear modulus mu of 0.006 dyne/cm give a value for the surface viscosity of red cell membrane as a viscoelastic solid material of eta = mu tc = (6-8) X 10(-4) poise . cm.
1976年埃文斯和霍赫穆特提出的膜粘弹性理论被用于分析细长细胞的时间依赖性恢复。在释放之前，细长细胞处于静态平衡，外力由膜弹力合力平衡。释放后，细胞以粘弹性固体模型特有的时间依赖性指数行为恢复其初始形状。结果表明，对于0.1 - 0.13 s范围内的时间常数，该模型能很好地描述时间依赖性恢复过程。时间常数是膜表面粘度η与膜表面弹性μ的比值。对剪切模量μ为0.006达因/厘米的测量得出，作为粘弹性固体材料的红细胞膜表面粘度值为η = μtc = (6 - 8)×10⁻⁴泊·厘米。
