Detail publikace

DIELECTRIC AND IMPEDANCE SPECTROSCOPY OF HYALURONIC ACID AND ITS SALTS

Originální název

DIELECTRIC AND IMPEDANCE SPECTROSCOPY OF HYALURONIC ACID AND ITS SALTS

Anglický název

DIELECTRIC AND IMPEDANCE SPECTROSCOPY OF HYALURONIC ACID AND ITS SALTS

Jazyk

en

Originální abstrakt

The paper presents the results of permittivity and conductivity measurement on hyaluronic acid and its sodium salt. The conductivity of the sample is rather large (~1E-8 S/m) so that it masks any relaxation peaks. The conductivity is modelled as a sum of a dc component and one or more power-law ac components. The activation energy of the dc component is about 5.4 MJ/kmol. Conductivity of the sample does not depend on the type of the cation in the molecule of the hyaluronic acid; hence the conductivity is associated rather with electrons. The validity of the power law with the exponent n ~ 1, which is a ubiquitous phenomenon in low-molecular-weight matter, has now also been proved for hyaluronic acid - a very high-molecular-weight material.

Anglický abstrakt

The paper presents the results of permittivity and conductivity measurement on hyaluronic acid and its sodium salt. The conductivity of the sample is rather large (~1E-8 S/m) so that it masks any relaxation peaks. The conductivity is modelled as a sum of a dc component and one or more power-law ac components. The activation energy of the dc component is about 5.4 MJ/kmol. Conductivity of the sample does not depend on the type of the cation in the molecule of the hyaluronic acid; hence the conductivity is associated rather with electrons. The validity of the power law with the exponent n ~ 1, which is a ubiquitous phenomenon in low-molecular-weight matter, has now also been proved for hyaluronic acid - a very high-molecular-weight material.

BibTex


@inproceedings{BUT25273,
  author="Salem Omar Saeid {El-Fakhri} and Karel {Liedermann}",
  title="DIELECTRIC AND IMPEDANCE SPECTROSCOPY OF HYALURONIC ACID AND ITS SALTS",
  annote="The paper presents the results of permittivity and conductivity measurement on hyaluronic acid and its sodium salt. The conductivity of the sample is rather large (~1E-8 S/m) so that it masks any relaxation peaks. The conductivity is modelled as a sum of a dc component and one or more power-law ac components. The activation energy of the dc component is about 5.4 MJ/kmol. Conductivity of the sample does not depend on the type of the cation in the molecule of the hyaluronic acid; hence the conductivity is associated rather with electrons. The validity of the power law with the exponent n ~ 1, which is a ubiquitous phenomenon in low-molecular-weight matter, has now also been proved for hyaluronic acid - a very high-molecular-weight material.",
  address="Ing. Novotny, CSc., Brno",
  booktitle="new trends in physics 2007",
  chapter="25273",
  edition="1",
  institution="Ing. Novotny, CSc., Brno",
  year="2007",
  month="september",
  pages="23--26",
  publisher="Ing. Novotny, CSc., Brno",
  type="conference paper"
}