Bromelain--------it digests proteins.
Pineapples contain an enzyme called bromelain. THis enzyme stops the Jello from jelling because it breaks dowm the strands of protein that form Jello. Cooking the pineapple denatures this enzyme therefore preventing it from stopping the Jello.
I suspect you're thinking of bromelain.
Pineapple contains an enzyme which prevents gelatin from setting. Heat destroys (denatures) enzymes.
Pineapples should be added towards the end. Watch the ham cook. When there are about 15 minutes left, slice up your pineapple. Then add them to the ham. If you are using fresh pineapple, it is important not to add the slices to the ham too early. Fresh pineapple contains an enzyme that will cause the ham to turn mushy. Better yet, use canned pineapple, the canning process destroys the enzyme. Also, do not store the leftover ham with the pineapple slices.
Pineapple
It is widely believed that ripe fresh pineapple contains bromelain enzymes which helps healing, reducing inflammation and improving digestion. The digestion improvement was brought by the enzymes which act specifically to break down protein, thus ease digestion.
Due to the bromelain enzyme in fresh pineapple, the jello will not set. Jello has the protein gelatin in it, and the bromelain prevents the gelatin molecules to bond with other gelatin molecules. If you make two molds of jello, one with pineapple, one without, you will find that only the one without pineapple will set. If you use canned pineapple, the jello will set because canned products are heated to eliminate microbes, but it also destroys or greatly reduces the amount of enzymes present.
Fresh pineapple contains an enzyme, Bromelain, that breaks down collagen, the stuff that holds meat together. In small amounts and in short exposure times this can make a tough piece of meat tender, but in larger amounts and in longer exposure times, this enzyme will turn meat into mush. I started researching this after a couple of disappointing ham experiences. The good news is that the enzyme is destroyed from by heat in the canning process, so canned pineapple can still be used. Apparently the baking process does not heat the pineapple fast enough to prevent fresh pineapple from damaging a ham.
I really honestly do not think that you can can fresh pineapple because normally it is canned for you
its protease , --YERPPP
If it is fresh pineapple it should'nt be fermenting so the answer is no.
sliced fresh pineapple