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Source
Celery
Enzyme
Catalase
Substrate
Hydrogen peroxide
Product
Oxygen and water
Process steps one to three
Blend 5g of celery. Filter celery and place in graduated cylinder. Add washing up liquid and ph buffer 9.
Process steps 3 - 6
Place both cylinders of enzyme and substrate into a water bath of 25 degrees. Mix into one cylinder. Measure volume of foam over 1 minute.
pH variant
Change pH buffer. 9,2,4,12 and compare
Temperature variant
Change temperature of water bath. 20,40,60
Heat denaturation variant
Boil celery at the start. Use a control with un boiled celery.