The shelf life of jackfruit stone as the raw material for glucose synthesis. The synthesis of glucose conducted by
the acid method with solution concentration of 25 %, temperatures of 135 o
C to 150 o
C for 40 min at pH 2.0, 2.5,
3.0, 3.5, 4.0. It can be seen that the glucose content obtained from the acid method is smaller than the enzyme
method, while the volume ratio of acid method is larger than the enzyme method Fig. 2 to Fig. 6 depict the glucose
content in the solution obtained by two different methods, i.e. acid and enzyme methods.