Globulin / by J. Mellanby.

  • Mellanby, J.
Date:
[1905?]
Catalogue details

Licence: Public Domain Mark

Credit: Globulin / by J. Mellanby. Source: Wellcome Collection.

    19/42 (page 353)
    done, but which to some extent would account for the small discrepancies observed in the experimental results. To determine the influence of the velocity of the ion the solubility curves for the solution of globulin by sodium chloride at various temperatures were determined. In a dilute solution of sodium chloride it is assumed that ionisation is practically complete and that increasing conductivity with increasing temperature is mainly due to the increased velocity of the ions. The results obtained are given below and are plotted on Fig. 9. Temperature 1-5° C. 20° C. 30° C. 40° C. 50° C. NaCl in terms of eq. wt. (5*85 °/0)=1000 136*8 119*0 J 102*4 1 92*0 I 81*7 1 68*0 85*1 76*6 69*8 59*6 51*1 42*6 « 75*0 68*0 61*3 54*5 47*7 41*0 68*0 61*3 54*5 47*7 41*0 34*0 61*3 54*5 51*0 47*7 41*0 ' 34*0 % of original globulin dissolved 78*5 69*0 57*5 52 43 37 78 66 57 46 38*5 26*5 94*5 66 56 45*5 40*7 30 80 69 54*5 49 51 32 *5 76 61 57*5 55 47 36 The value of the temperature coefficient may be obtained by deter¬ mining the areas enclosed by the different temperature curves. These areas are inversely proportional to the efficiency of the salt at that temperature. If therefore we take the reciprocals of these area values