Abstract
The velocity constant of reaction in the production of unfermentable sugar from glucose was determined by varying temperatures.
1) The velocity constants of 0.5 N-sulfuric acid solution of 10% glucose at 80° and 60° are 1.68×10-4, and 2.24×10-5, respectively.
2) These values, together with the values determined at 100° given in the 4th Report satisfy the Arrhenius' equation.
3) The activation energy calculated from the Arrhenius' equation is 29, 700cal.
4) The velocity constant calculated from the Arrhenius' equation at 120° is 1.78×10-2. The experimental values of unfermentable sugar obtained by the reaction for 15, 45 and 90 minutes coincide well with calculated values based on the velocity constant and the equiribrium constant at 120° described in the 3rd report.
