From The Brewers’ Journal – November 1921
By A. Harden and F.R. Henley (Biochem. Journ.)
By adding potassium and sodium chlorides and sulphates to the fermentation of dextrose and lævulose by zymase in the presence of phosphate, found that the maximum rate of gas production decreased but that the time required to reach this maximum increased. The sulphates had a stronger effect than the corresponding chlorides. The addition of salts diminished the velocity of reaction of hexosephosphatase, but carboxylase was unaffected. By an addition of excess of potassium phosphate to a zymase fermentation the rate of reaction was depressed, but in the presence of acetaldehyde this depression was greatly inhibited. The depression produced by the addition of potassium sulphate was practically unaffected by the addition of acetaldehyde.
Crescent City Brew Talk 