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In the last paper 1 the writer showed that a measurable potential difference is found when we separate a protein solution from a watery solution (free from protein) by a collodion membrane. When the protein in solution is a protein-acid salt (e.g., gelatin chloride) the protein solution is positive and the water is negative; when
pH is no longer the same on both sides of the membrane at the time of equilibrium but is lower on the outside than in the gelatin solution. The Donnan equilibrium demands in this case that acid be given off from the gelatin chloride solution to the outside aqueous solution. (containing no gelatin). The writer has found that,
23 Jan 2014 This result was attributed to the presence of large charged molecules that induce ion concentration gradients to ensure electroneutrality (the Donnan effect), leading to osmotic pressures and water accumulation. We use a mathematical triphasic model for soft tissue to characterize the underlying processes
21 Jan 2010 The accuracy of this increasingly popular technique can be further refined after taking into consideration the Donnan membrane equilibrium (27). Volume reduction of Hydrogen Ion (H) in Waste Acid as a Driver for Environmentally Sustainable Processes: Opportunities and Challenges. Michael German
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21 Jan 2010 for chemical remediation. In this Feature, Sarkar, SenGupta, and Prakash briefly explain the Donnan principle and review its potential for sustainable technologies. . Hydrogen Ion (H) in Waste Acid as a Driver for Environmentally Sustainable Processes: Opportunities and Challenges. Michael German
paper contains no mention of ions nor of an electric potential difference. Indeed, as Guggenheim (2) has The theory of ionic membrane equilibrium was developed by Donnan (3) in 1911. He considered a .. The writer is indebted to Dr. Alexander Mauro for many helpful discussions dur- ing the progress of this work.
3 Nov 2003 Our study is focused on the adsorption of macroions on the membrane surface and on the osmotic pressure. The theoretical prediction for the osmotic pressure shows a good agreement with experimental results. Keywords: Donnan equilibrium, semipermeable membrane, charge reversal, charge inversion,
It had been shown in previous publications that the osmotic pressure of a 1 per cent solution of a protein-acid salt varies in a characteristic way with the hydrogen ion concentration of the solution, the osmotic pressure having a minimum at the isoelectric point, rising steeply with a decrease in pH until a maximum is reached
In the last paper 1 the writer showed that a measurable potential difference is found when we separate a protein solution from a watery solution (free from protein) by a collodion membrane. When the protein in solution is a protein-acid salt (e.g., gelatin chloride) the protein solution is positive and the water is negative; when
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