The dielectric properties of aqueous nucleic acid solutions

Neale, S. M.; Weyl, D.A.

doi:10.1098/rspa.1966.0101

Cited by 6 publications

References 4 publications

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Relation between low‐frequency dielectric behavior of cellulosic materials and their inorganic contaminations

Moteleb¹,

Shinouda²

1991

J of Applied Polymer Sci

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SYNOPSISResults are given for dielectric constant and loss factor of some cellulosic materials of different fine structure free of and contaminated with water-soluble inorganic salts in the frequency range 0.1-100 kc/s and at temperatures 283.15-333.15 K. The analysis of the results reveals that the dielectric dispersion and loss peak found before with medicated cotton and viscose rayon, of ash contents of 0.3 and 1.4% respectively, disappear when these fibers have been "cleaned up" from inorganic impurities by acid washes. These anomalous dielectric behaviours reappear again with "cellulose-inorganic salts" admixtures. Based on these findings, it has been concluded that the secondary relaxation process observed in the low-frequency region 0.1-1 kc/s with cellulosic materials contaminated with inorganic impurities is not intrinsic but extrinsic in nature due to the displacement of ions adsorbed in the inner surfaces of such interstitial conduction system.

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Relation between low‐frequency dielectric behavior of cellulosic materials and their inorganic contaminations

Moteleb¹,

Shinouda²

1991

J of Applied Polymer Sci

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Electric permittivity of alfalfa mosaic virus in aqueous solutions

1973

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SynopsisThe electric permittivity of alfalfa virus particles in buffer solutions of three different concentrations at p H 7 was studied between 10 kHz and 100 MHz. The experimental results could be described with one single dispersion curve of the Cole-Cole type characterized by a concentration independent specific dielectric increment and mean relaxation time. The results werc interpreted semi-quantitatively in terms of counterionsatmosphere polarizability , neglecting counterion repulsion.

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Dielectric properties of aqueous solutions of sonicated DNA above 40 MHz

Oro

Grigera

1984

Biopolymers

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SynopsisThe dielectric properties of sonicated calf-thymus DNA sodium salt in aqueous sclutions have been studied in the frequency range from 40 MHz to 2 GHz by time domain spectroscopy (TDS). A dielectric dispersion not previously reported was found, which has a characteristic frequency of about 150 MHz. All of the dielectric parameters are insensitive to the size of DNA fragments and to helix-to-coil transitions. The study of this dispersion as a function of DNA concentration and temperature allows us to conclude that it may be due to counterion fluctuation on short sections, probably in a direction transverse to the macromolecular axis.

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The dielectric properties of aqueous nucleic acid solutions

Cited by 6 publications

References 4 publications

Relation between low‐frequency dielectric behavior of cellulosic materials and their inorganic contaminations

Relation between low‐frequency dielectric behavior of cellulosic materials and their inorganic contaminations

Electric permittivity of alfalfa mosaic virus in aqueous solutions

Dielectric properties of aqueous solutions of sonicated DNA above 40 MHz

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