Winet H
J Exp Biol. 1976 Apr;64(2):283-302. doi: 10.1242/jeb.64.2.283.
The lubrication effect of three long-chain polymers - mucin, methylcellulose and Ficoll - on ciliary propulsion in tubes is measured by plotting the relative velocities of swimming cilitates as a function of the tube bore diameter. Mucin shows the most unequivocal lubrication, which is found at concentrations between 0% and 9.1% (w/v). This observation, coupled with viscometric measurements which show that ciliary tip shear rates are sufficient to solate mucin, serve as the groundwork for a model of mucin lubrication which explains the optimized lubrication behaviour of thixotropic gelating polymers as an expression of the response to shear by the various stages of polymer clustering during the gelatin process. In addition to the lubricative effect, another wall drag reduction effect by mucin was measured in the clearance region beyond the lubrication layer. This apparent viscosity reduction is optimized in the concentration range between I.7% and 4.I% mucin and may also be explained in terms of the properties of gel clustering.
通过绘制游动纤毛虫的相对速度与管内径的函数关系，测量了三种长链聚合物——粘蛋白、甲基纤维素和聚蔗糖——对管内纤毛推进的润滑作用。粘蛋白显示出最明确的润滑效果，在浓度为0%至9.1%（w/v）之间可观察到。这一观察结果，再加上粘度测量表明纤毛尖端剪切速率足以使粘蛋白溶解，为粘蛋白润滑模型奠定了基础，该模型将触变凝胶聚合物的优化润滑行为解释为凝胶化过程中聚合物聚集各阶段对剪切响应的一种表现。除了润滑作用外，在润滑层之外的间隙区域还测量到了粘蛋白的另一种壁面减阻作用。这种表观粘度降低在粘蛋白浓度范围为1.7%至4.1%时达到最佳，也可以根据凝胶聚集的特性来解释。
