The Journal of biological chemistry . other words, the heat absorption comes from the precipitationof calcium and magnesium as phosphates and citrates. From the above we may conclude that the thickening of con-densed milk under the influence of heat is accompanied by anendothermic chemical reaction, which results in the precipitationof at least a portion of the metals present. It may be pointed out here that the artificial serum as preparedby Palmer is more acid than normal milk. If the tribasic citratesand phosphates are employed as given by Van Slyke and Bosworth(13) a more normal serum is o
The Journal of biological chemistry . other words, the heat absorption comes from the precipitationof calcium and magnesium as phosphates and citrates. From the above we may conclude that the thickening of con-densed milk under the influence of heat is accompanied by anendothermic chemical reaction, which results in the precipitationof at least a portion of the metals present. It may be pointed out here that the artificial serum as preparedby Palmer is more acid than normal milk. If the tribasic citratesand phosphates are employed as given by Van Slyke and Bosworth(13) a more normal serum is obtained than that given by Palmer,who used acid citrates and phosphates. We may now prove one more point of considerable theoreticalinterest. In Fig. 2, A, we give the heat absorption curve obtainedon an artificial serum, as compared with a normal water curve. 62 Heat Coagulation of Milk u HO 120 _ 100 30 ae 24 ao Logs of Time 41 -v^ .0_ 60. 40- Water 10090 807060 A-Art\ (lcia\ Strom 40 B-Dc>\jb\eC9\c\\)tn 30 C-Dnf,ConAmv. 20 10 0. Lo^arvtVvmvcCuvNe
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbiochem, bookyear1905
