TY - JOUR
AU - Cathcart, P. H.
AB - THE CHANGE IN THE HYDROGEN-ION CON CENTRA­ TION OF VARIOUS MEDIUMS DURING HEAT­ ING IN SOFT AND PYREX GLASS TUBES ]. R. EST Y AND P. H. CAT HeAR T From the Research Laboratory, National Canners Association, Washington, D. C. An exact knowledge of the reaction of a medium can be gained only from a determination of its hydrogen-ion concentration. It is a well established fact that sterilization of a medium or subjection of certain organic solutions to high temperatures for long periods increases their acidity. The presence in such mediums of the so-called "buffers," however, prevents rapid changes in the hydrogen-ion concentration, even if the titratable acidity is considerably altered. In order to determine accurately the thermal death point of heat resistant spores at high temperatures it is of utmost importance to control all the factors which influence it. In a previous paper 1 it has been shown that even a slight change in the hydrogen-ion concentration greatly affects the thermal death point. It is necessary, therefore, in the determination of thermal death points to heat under conditions which will maintain a constant hydrogen-ion concentration throughout the entire period. It is a well-known fact that heating solutions in 
TI - The change in the hydrogen-ion concentration of various mediums during heating soft and pyrex glass tubes
JF - The Journal of Infectious Diseases
DO - 10.1093/infdis/29.1.29
DA - 1921-07-01
UR - https://www.deepdyve.com/lp/oxford-university-press/the-change-in-the-hydrogen-ion-concentration-of-various-mediums-during-VaEYaqNmI3
SP - 29
EP - 39
VL - 29
IS - 1
DP - DeepDyve
ER -