Dielectric Studies of Electrolytic Poly-α-Amino Acids in Aqueous Solutions

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概要

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• Dielectric dispersions of poly-L-lysine and its various salts in aqueous solutions were measured in a frequency range 1 kHz∼3 MHz. The dispersion curve was found to have a single midpoint frequency for helical poly-L-lysine. The electric dipole moment was proportional to its molecular weight and was 4.0 Debyes per lysine residue. The value of limiting relaxation time and its dependence on the molecular weight were discussed to know whether they indicated that the dielectric dispersion was due to rotational motion of electric dipole on the molecule or not. On the other hand, the dispersions of its salts were almost found to be appoximated by Debye's curves of separated two relaxation times. From the value of limiting relaxation time in the lower frequency region and its dependence on molecular weight, the dielectric dispersions of salts might be considered to be due to movement of counter-ions. Also, the dielectric dispersions of these salts in the frequency region higher than 100 kHz were explained by Maxwell-Wagner-Sillars effect.

• 社団法人日本物理学会の論文
• 1972-03-05

著者

• SUGAI Shintaro

  Department of Bioengineering, Faculty of Engineering, Soka University

• KUMAZAKI Masaharu

  Department of Polymer Science, Faculty of Science, Hokkaido University

• Kumazaki Masaharu

  Department Of Polymer Science Faculty Of Science Hokkaido University

• Sugai Shintaro

  Department Of Bioengincering Facutly Of Engineering Soka University

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• Potentiometric Titration of Poly-DL-Glutamic Acid in Aqueous Solution
• Dielectric Studies of Electrolytic Poly-α-Amino Acids in Aqueous Solutions
• The Conformation and the Conformational Transition of Copolymers of O-Benzyl-L-Serine and γ-Benzyl-L-Glutamate
• On Photographic Chemical Development

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