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-   -   food science scienc fair topic!!!!!!!!!! (http://classroom.all-science-fair-projects.com/forum/showthread.php?t=1134)

actinggal7 01-12-2006 04:57 PM

food science scienc fair topic!!!!!!!!!!
 
please help i know theres a whole list but lots of the ideas seem really difficult to experiment on and i dont know how to do them...does anyone know good science fair =projects to do with food and nutrition or like food science that are at a gr. 11 level science but not too hard to experiment on???? i read something about if you can preserve animals by freezing them like for exampe a fish but that may be at a lower level;...any other ideas??? please im desperate and ive posted many times before!! please help!
xox:( :( :(

dreamerofeternity 01-12-2006 07:39 PM

Quote:

Originally Posted by actinggal7
please help i know theres a whole list but lots of the ideas seem really difficult to experiment on and i dont know how to do them...does anyone know good science fair =projects to do with food and nutrition or like food science that are at a gr. 11 level science but not too hard to experiment on???? i read something about if you can preserve animals by freezing them like for exampe a fish but that may be at a lower level;...any other ideas??? please im desperate and ive posted many times before!! please help!
xox:( :( :(


Hum...

Once again, I have a few suggestions. It's your choice.

1) Effect of heat/acid on milk.
2) Calorimeter--basically measuring the calories in a food with simple tools such as a can of water, fire, and food. Research more about it if you're interested.
3) Or seeing how much popcorn pops by adding different amounts of water. (Moisture supposively helps pop more popcorn.)
4) The presence of protein in different foods. Just add biuret solution to a food mashed up in water and see if it turns from blue to purple. I suggest you use a blender for that. or buy baby food.

Mad Scientist 01-12-2006 09:13 PM

Food science fair projects
 
Excellent suggestions dreamerofeternity!

You should apply to become a Trainee Mentor. You definitely have what it takes to be a Mentor!

Actinggal7, have you also looked at these food science fair project ideas yet? [url]http://www.all-science-fair-projects.com/browse.php?category_id=39&project_ideasOrder=st_di ff&project_ideasDir=DESC[/url]

trueblue7 01-25-2006 07:45 PM

protein idea...
 
dreamerofeternity, you suggested something about testing protein in foods, could you explain that project more, or tell me where i can find more info on that thanx :)

dreamerofeternity 01-26-2006 02:18 PM

Biuret solution...

Go to google.com, type in biuret solution, and you have lots of information. But basically, when you put it in liquid, and it mixes with protein (or polypeptides), there will be a chemical reaction and a color change. It is orginally blue. In the presence of proteins, it will turn purple instantaneously with a little mixing. In the presence of polypeptides (smaller strands that make up protein), it will turn pink. If the solution becomes blue, there is no protein, because the blue would have come from the biuret solution.

Why you need to blend the food or buy baby food, because you can't put biuret solution on a solid banana. You have to mix biuret solution in a liquid. And not even on plain baby food. You'll have to dilute the baby food with water so 1) it is thin enough so you can see the color 2)More surface area for the biuret to react with.

Make sure you have access to biuret solution at your school.

It would be even better if you have access of Lugol's iodine solution as well. It tests for starch. If you're going to be testing for Biuret Solution anyways, might as well get some Lugol's iodine solution. It tests for starch. So add some into the food, and if it turns from tanish brown to dark purple/black, there is starch. So you can see which foods have starch, which have proteins, and if you want a sugar test, you'll need Benedict's solution. But it isn't instantaneous. You have to heat up the solution. If you're interested, ask me for more info, cause the Benedict's test is a little more complicated.

You might want to look online if you want to look at some other nutrient tests. I've gave you ideas for proteins, sugar, and starch. I know of a fat test, but I'm not sure how accurate it is. You basically put your food on a paper towel. After it dries, if there's an oil spot on it, there are fats.

good luck!

trueblue7 01-26-2006 02:42 PM

Yay! Thanks a lot for the help :)


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