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Science Fair Project
Transcript of Science Fair Project
Berries of all kinds are juicy, sweet, and delicious. However, berries get moldy easily. Especially in cool wet areas, the deadly fungus, Botrytis Cinerea, grows fast on the berries. Food scientist, Harold McGee, explained that "thermotherapy" can prolong the life of berries by subjecting berries to heat to prevent mold spores from growing. By submerging berries in hot water at certain temperatures, the heat can kill the Botrytis Cinerea mold spores and prolong the growth of the mold.
I think that 140 degrees Fahrenheit is the optimal heating temperature to prolong the freshness of strawberries without damaging them.
Control Variables: strawberries that were not heated.
Independent Variables: The different temperatures that strawberries are submerged in.
Dependent Variables: moldiness of strawberries depending on the temperature that they were submerged in.
Science Fair Project
1. Put 10 strawberries in a plastic berry box. Cover with plastic wrap. Label "control."
2. Put 10 strawberries in a plastic box. Fill the sauce pan with water. Heat the water to 110 degrees. Using tongs, submerge the strawberries for 30 seconds. Remove the berries and cover with plastic wrap. Label "110/30."
Are these berries edible or are these berries destroyed by the heat?
3. Repeat step #2 for 110, 115, 120, 125, 130, 135, 140, and 145. Label all containers.
4. Make sure each group of berries are stored at least several feet away from each other.
5. Check all the strawberries every 12 hours to see how many berries are moldy in each container?
6. Repeat the experiment with blackberries.
Access to a stove
A large saucepan
2 boxes of fresh (not frozen) strawberries
1-2 boxes of different berries
Plastic berry boxes
Is there any optimal heating temperature to prolong the freshness of strawberries without damaging them?
The goal of the experiment is to see whether strawberries can be preserved longer without using preservatives.
In Conclusion, at the very end I was partly correct. In the beginning I guessed that 145 degrees would be the perfect optimal temperature; but actually all 125 degrees and above took the longest to become moldy.
By: Caitlin M. Chau