Collected papers . manner. An examination of the figuresshowed that the relation of the concentration to time did not follow asimple logarithmic law, but decreased with time more quickly than wouldbe accounted for if the rate were merely proportional to the concentra-tion of protein. We have made a large number of experiments with egg-albumensolution, the details of which we have not included in this paper. Theresults of these experiments showed general agreement with those HEAT COAGULATION OF PROTEINS. 413 described above and afforded curves similar to those drawn in Fig. 3,For some time we w
Collected papers . manner. An examination of the figuresshowed that the relation of the concentration to time did not follow asimple logarithmic law, but decreased with time more quickly than wouldbe accounted for if the rate were merely proportional to the concentra-tion of protein. We have made a large number of experiments with egg-albumensolution, the details of which we have not included in this paper. Theresults of these experiments showed general agreement with those HEAT COAGULATION OF PROTEINS. 413 described above and afforded curves similar to those drawn in Fig. 3,For some time we were not aware how extremely sensitive this processis to a variety of influences, and that it is essential to work with thesame solution if the results are to be compared. No preservative ispermissible and the solutions must be frozen during the time betweenthe observations. In the early portion of the work sufficient precautionswere not taken, and these experiments cannot therefore be used forcomparative TlM£ IN M/NU7ES100 200 iW 400 500 600 700 Fig. 3. Influence of temperature upon coagulation rate of egg-albumen. Coagulation of1% solution at temperatures from 69° C. to 76-3° C. Ordinates = concentration ofalbumen in milligrams per TABLE III. Temperature coeffijcient of heat coagulation of hcemoglohin. Material Temperatureof hatli Velocity constant = A (/fxlOS)= 1okA; Mean logarith-mic differencein velocityconstant perVC. Temperature coefficient, mean relative change in velo- citv constant for 1° C. !.^^:MlogeA-o-log«A-H) Haemo-globin 70-467-6 0-150-074 2-176= logfco 1-869 0-109 — 58,700 65-6 0-044 1-643 0111 — 59,410 62-6 0-019 1-278 0115 — 61,030 60 0-0093 0-968 0-116 — 61,070 mean 0113 1-30 mean 60,050 27—2 414 H. CHICK AND C. J. MARTIN. Temperature coefficient of the reaction. Hcemoglobin. The effect of temperature upon the reaction velocityof coagulation was studied by comparing the velocity constants at thevarious temperatures. The availabl
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