A Dielectric Study of the Gelatin–Water System: Anomalous Dispersion in Bound (Oriented) Water.

Abstract

Solutions of many substances of high molecular weight, such as gelatin, casein, starch, gum arabic, and Congo red, show a rapid increase in electric conductance with increasing frequency (24,25,53,54). Largely independent investigations show that the dielectric constants of some of these and other similar systems increase with decreasing frequency and that values for the dielectric constant many times higher than that of the solvent may be obtained at low frequencies (7

The Dielectric Properties of the System Gelatin–Water. II.

“…In a recent paper, we described some of the polarizability properties exhibited by the system gelatin-water (2). These properties are essentially the same for the sol and the gel state and may be summarized as follows: Over the whole range of frequencies of 0.5 to nearly 10s kilocycles, for which measurements have been made, the dielectric constant increases as the frequency decreases, reaching values many times higher than that of water, at low frequencies, in systems of moderately high gelatin contents.…”

Gelatin: a skin phantom for bioimpedance spectroscopy

“…By observing figure 4(b), it can be seen that the influence of salt in the impedance modulus value is not linear, seeming to present a saturation value near 1% salt concentration. This is probably related to the polarization dependence of the dielectric properties of gelatin [20], which are highly influenced by the shielding of the electrostatic interactions in the presence of salt, as explained above.…”

The The Mechanism of Diffusion of Ions across a Phase Boundary and through Cell Walls.

“…As dipolar ions, the phospholipid molecules comprising the membrane would be expected to have a fairly high dielectric constant. It is established that aqueous proteins also have very high dielectric constants (25,26). Since the solubility of ions varies exponentially with the negative reciprocal of the dielectric constant of the solvent, the partition coefficient is less, and therefore k/2 is greater, in polar solvents.…”