1422 ミクロ流れ場でのDNA高分子の伸張変形(S30-4 複雑流体の流動現象(4),S30 複雑流体の流動現象)

概要

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Elongational behaviors of DNA polymer in micro channel have been directly observed utilizing a fluorescence microscope. Dilute aqueous solution of fluorescently-stained DNA polymer flows in the channel with a sudden contraction. The length of the DNA polymers was measured at three areas, i.e. upstream, contraction and downstream areas. Moreover, the behavior of polymers at the center region and near the wall of the channel was also compared. In the center region of the channel, where only elongational effect is expected, we could not observed extended DNA polymers, because of low elongational rate in this experiment. Obviously extended DNA polymers were observed near the wall at the contraction area even under low elongational condition. However, it was difficult to fully keep the extension of the DNA polymers in shear dominated downstream flow.
社団法人日本機械学会の論文
2007-09-07