The Volume Phase Transitions of Chemically Cross-Linked DNA Gels Induced by Salts : Na^+ and Mg^<2+> Ions (2)
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概要
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A chemically cross-linked DNA gel in acetone-water mixtures involving salt is demonstrated to bring about the volume phase transition with varying the salt concentration. The salt concentration at the discrete volume change depends strongly on the valency of the positive salt ion in the solution. The transition salt comcentration for NaCl is several hundred times larger than the transition MgCl_2 concentration. For NaCl, the first order phase transition is observed at the NaCl concentration of 4 × 10^<-2> mol/l for the 60% acetone-water mixtures. For MgCl_2, the discrete volume change are observed at 8 × 10^<-5> mol/l of MgCl_2 concentration for 50% acetone-ware mixtures, 7 × 10^<-5>mol/l for 60%, respectively.
- 琉球大学理学部の論文
著者
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TAKUSHI Eisei
Department of Physics, College of Science University of the Ryukyus
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Takushi E
Univ. Ryukyus Okinawa Jpn
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YONEKURA Nobuaki
Department of Chemistry, Biology and Marine Sciences, Faculty of Sciences, University of the Ryukyus
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Yonekura Nobuaki
Department Of Molecular Science And Technology Kyushu University
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TAKUSHI Eisei
Department of Physics, College of Science, University of the Ryukyus
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