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Why doesn't jelly set when fresh pineapple is used?
Title: Why doesn't jelly set when fresh pineapple is used?
Category: Science & Technology
Details: Words: 2219 | Pages: 9.4 (approximately 235 words/page)
Why doesn't jelly set when fresh pineapple is used?
Basic Problem:
Jelly is made from protein, gelatin, this is dissolved in hot water and as it cools, it sets. For a childrens party it was decided to make some fruit jellies, these were made by putting sliced pineapple into the jelly before it set, the following observations were made:
oThe jelly set normally when tinned pineapple was added.
oWhen fresh, unripe pineapple was used the jelly set but was not as firm.
oWhen fresh, …showed first 75 words of 2219 total…
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…showed last 75 words of 2219 total…reaction other than the enzymes, the control just consists of a disk with the hole cut out, and water in place of a solution.
Tinned pineapple:
This was set up the same as the other experiments. It is the only real juice used, as it can not be reproduced as a solution.
References:
Advanced Biology principles and applications, C J Clegg and D G Mackean
www.howstuffworks.com
Cambridge advanced sciences Mammalian physiology and behaviour
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