S0501-2-5 マイクロクエット流れ場でのDNA高分子の変形挙動に対する流路サイズの影響(複雑流体の流動現象(2))

概要

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Structural relaxation process of DNA molecules after the cessation of micro Couette flow with 5-l0iim gap were investigated with fluorescent microscopy. In order to clarify the influence of entanglement of molecules to the relaxation behavior, we have tested dilute labeled T4-DNA solution and semi-dilute solutions with mixture of a small amount of the labeled T4-DNA and unlabeled ones. Moreover, viscosity of the dilute solution was closed to that of the semi-dilute one with sucrose. It was clarified that the relaxation process was affected with the gap size in the micro system and the smaller gap delayed the structural relaxation. Even if the solutions have same viscosity in macro sense, the entangled system showed longer relaxation times than those of dilute system.
社団法人日本機械学会の論文
2009-09-12