THE COMBINATION OF DEAMINIZED GELATIN WITH HYDROCHLORIC ACID
نویسندگان
چکیده
منابع مشابه
The Combination of Deaminized Gelatin with Hydrochloric Acid
1. The analysis of isoelectric gelatin by the Van Slyke method indicates 0.00040 equivalents of amino N per gm. gelatin. 2. If deaminized gelatin is prepared without heating, the product contains less nitrogen than the original gelatin by an amount equal to 0.00040 equivalents N per gm. protein. 3. Deaminized gelatin, prepared either with or without heating, contains no amino nitrogen detectabl...
متن کاملThe Combination of Gelatin with Hydrochloric Acid
1. Cooper's gelatin purified according to Northrop and Kunitz exhibited a minimum of osmotic pressure and a maximum of opacity at pH 5.05 +/-0.05. The pH of solutions of this gelatin in water was also close to this value. It is inferred that such gelatin is isoelectric at this pH and not at pH 4.70. 2. Hydrogen electrode measurements with KCl-agar junctions were made with concentrated solutions...
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It has been found possible to obtain constant dry weights of sheet gelatin only by drying in vacuo at temperatures below 100 degrees C. for a period of several weeks. Values are given for the ash and nitrogen content, the specific conductivity, and the isoelectric point of a standard gelatin preparation. By the method of E.M.F. measurements of cells without liquid junction, of the type Ag, AgCl...
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Electromotive force measurements of cells without liquid junction, of the type Ag, AgCl, HCl + protein, H(2), lead to the conclusion that 1 gm. of edestin (or, more probably, edestan) combines with a maximum of 13.4 x 10(-4) equivalents of H(+) and 3.9 x 10(-4) equivalents of Cl(-), when the protein is dissolved in 0.1 M HCl.
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Electromotive force measurements of cells without liquid junction, of the type Ag, AgCl, HCl + protein, H(2), have been made at 30 degrees C. with the proteins gelatin, edestin, and casein in 0.1 M hydrochloric acid. The data are consistent with the assumptions of a constant combining capacity of each protein for hydrogen ion, no combination with chloride ion, and Failey's principle of a linear...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1923
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.6.1.95