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Effect of ions on the dielectric relaxation of DNA

✍ Scribed by Shiro Takashima

Publisher
Wiley (John Wiley & Sons)
Year
1967
Tongue
English
Weight
738 KB
Volume
5
Category
Article
ISSN
0006-3525

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✦ Synopsis

The dieleclric relaxation of DNA solutions has been investigated with and wilhout extraneous ions covering a wide frequency range. The effect of monovalent ions such m Na, K, and Li w well as divalent ions such as Mg, Ca, and Hg have been included in the study. These ions are found to have a profound effect on the dielectric increment and the relaxation time without affecting the molecular dimension drastically. This dielectric effect is interpreted as indicating the importance of counterion fluctuation on the low frequency dielectric constant of DNA in solution. The effect of an organic ion, tetramethylammoniun bromide, has also been studied. This ion has no noticeable effect. A simple theory is derived on the bask of a microscopic model to account for the effect of external ions on the dielectric behavior of solutions of DNA. * This parameter shonld not be confused with the Cole-Cole pnramet,er a. 1)IELEC'I'HIC IiISLAXA'I'ION 014' DNA

πŸ“œ SIMILAR VOLUMES

On the mechanism of dielectric relaxatio
On the mechanism of dielectric relaxation in aqueous DNA solutions
✍ B. Saif; R. K. Mohr; C. J. Montrose; T. A. Litovitz πŸ“‚ Article πŸ“… 1991 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 844 KB

## SYNOPSIS The complex dielectric response of calf thymus DNA in aqueous saline solutions has been measured from 1 MHz to 1 GHz. The results are presented in terms of the relaxation of the incremental contributions to the permittivity and conductivity from the condensed counterions surrounding th

Dielectric relaxation of DNA solutions.
Dielectric relaxation of DNA solutions. II
✍ Masanori Sakamoto; Reinosuke Hayakawa; Yasaku Wada πŸ“‚ Article πŸ“… 1978 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 271 KB πŸ‘ 1 views

## Abstract Real and imaganiry parts of complex dielectric constant of dilute solutions of DNA in 10^βˆ’3^__M__ NaCl with molecular weight ranging from 0.4 Γ— 10^6^ to 4 Γ— 10^6^ were measured at frequencies from 0.2 Hz to 30 kHz. Dielectric increments ΔΡ were obtained from Cole‐Cole plots and relaxati

Dielectric relaxation of DNA solutions.
Dielectric relaxation of DNA solutions. IV. Effects of salts and dyes
✍ Masanori Sakamoto; Reinosuke Hayakawa; Yasaku Wada πŸ“‚ Article πŸ“… 1980 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 425 KB πŸ‘ 1 views

## Synopsis T h e effects of salts (NaCI, I K l , Me4NCI, AgNO:!, MgCI?, ('uC'l2. anti Mn('l2) ;ind dyes (acridine orange and methylene blue) on the low-t'requency dielectric relaxation (0.1 Hz-30 kHz) of dilute aqueous solutions of DNA were investigated with varying salt or dye concentrations. Bo

Dielectric relaxation and orientation of
Dielectric relaxation and orientation of DNA molecules
✍ M. Hanss; J. C. Bernengo πŸ“‚ Article πŸ“… 1973 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 506 KB

## Abstract A conductivity dispersion has been measured at very low frequencies (VLF) on several concentrated DNA solutions. By measuring simultaneously their electric birefringence decay, it is shown that the dielectric relaxation (which is related to the conductivity dispersion) is due to the mol