fluid having contained no sugar or amino acid initially causes animmediate rapid increase of the mucosal negativity.Although the properties of this potential increment(the sugar-or the amino acid-evoked potential)have been studied in various animal species by different authors,20-11,14)the nature of its genesis has not yet been fully explained. As shown by several authors,20-11,14)the sugar-or ...

Background: Pulsed amperometric detection is a relatively new method for detection of ions and especially nonelectrolytes such as carbohydrates in aqueous solutions. Pulsed amperometric detection relies on a redox reaction while electrochemical impedance simply measures the real and capacitive resistant of the solution. There is a correlation between the real impedance of a solution and the ion...

As described in the preceding paper (H6ber (1)), the isolated Ringerperfused frog liver is characterized by its ability to collect from the circulating fluid a great number of dyestuffs to such a degree that they appear in the secretion many hundred times concentrated. Now, this activity of the surviving gland can be abolished temporarily in a very striking way by substituting in the perfusion ...

to correct errors in Tables 1 and 2 and Equation 2. Please download this article again to view the correct version. The originally published, uncorrected article and the republished, corrected article are provided here for reference. Copyright: ß 2014 The PLOS ONE Staff. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestr...

The knowledge of sorption processes of nonelectrolytes in solution by solid adsorbents implies the study of kinetics, equilibrium, and thermodynamic functions. However, quite frequently the equilibrium isotherms are studied by comparing them with those corresponding to the Giles et al. classification (1); these isotherms are also analyzed by fitting them to equations based on thermodynamic or k...

Human red cell permeability to the homologous series of methanol, ethanol, n-propanol, n-butanol, and n-hexanol was determined in tracer efflux experiments by the continuous flow tube method, whose time resolution is 2-3 ms. Control experiments showed that unstirred layers in the cell suspension were less than 2 X 10(-4) cm, and that permeabilities less than or equal to 10(-2) cm s-1 can be det...

In a recent publication Carr and Sollner 1 have reported on the water uptake and the swelling of collodion membranes in water and solutions of strong inorganic electrolytes. They determined the weight and volume changes of collodion membranes when placed in water and when transferred from water to solutions of strong electrolytes. I t was found that dried collodion membranes swell reversibly to...

This paper reports the effects of amphotericin B, a polyene antibiotic, on the water and nonelectrolyte permeability of optically black, thin lipid membranes formed from sheep red blood cell lipids dissolved in decane. The permeability coefficients for the diffusion of water and nonelectrolytes (P(DDi)) were estimated from unidirectional tracer fluxes when net water flow (J(w)) was zero. Altern...

The countercurrent-perfused rete mirabile of the eel is a preparation in which capillary permeability values can be determined accurately in broadscale fashion. To provide insight into charge effects on transendothelial passage, the permeability values of small inorganic cations (labeled sodium and rubidium, and stable potassium) and anions (labeled chloride, iodide, sulfate, and ferrocyanide) ...

Caveolae are invaginated membrane structures with high levels of cholesterol, sphingomyelin, and caveolin protein that are predicted to exist as liquid-ordered domains with low water permeability. We isolated a caveolae-enriched membrane fraction without detergents from rat lung and characterized its permeability properties to nonelectrolytes and protons. Membrane permeability to water was 2.85...