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Eat Your Broccoli?: What happens to the Vitamin C content in broccoli when it is cooked?

Alex Kattan's Form II Math-Science Presentation
by

Alex Kattan

on 6 February 2013

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Transcript of Eat Your Broccoli?: What happens to the Vitamin C content in broccoli when it is cooked?

Eat Your Broccoli?: What Happens to the Vitamin C Content in Broccoli When it is Cooked? By Alex Kattan How does cooking broccoli affect its vitamin C content? Broccoli has a very high vitamin C content. Bar Graphs (Boiled Broccoli) Bar Graphs (Steamed Broccoli) Line Graph (Boiled) Line Graph (Steamed Broccoli) Boiling Experiment Observations
Large change in results for 8 minutes. Steaming Experiment Observations
Results stayed approximately the same
Vitamin C content stayed constant for various steaming times (2-8 min)

Vitamin C content decreased as boiling times increased (2-8 min) Conclusion
Hypothesis was partially correct Conclusions THANK YOU! Bibliography
http://www.produceoasis.com/Items_folder/Vegetables/Broccoli.html
http://www.choose-healthy-food.com/cooking-food.html
http://www.thefreedictionary.com/indicator
http://www.thefreedictionary.com/titration
http://www.fitday.com/fitness-articles/nutrition/vitamins-minerals/vitamin-c-why-its-important.html
http://www.medicalnewstoday.com/articles/155758.php
http://www.ayurvediccure.com/health/importance-of-vitamin-c/ Materials Procedure Blender Medicine Dropper Boiling Pot Electronic
Scale Timer Measuring Cup Starch-Iodine Indicator Making the vitamin C solution (control) Indicator turned clear after one drop
of the solution Cut broccoli Weigh 10g of broccoli Put broccoli in boiling
pot to boil for 2-8 min Put broccoli and 200 mL
water in blender Blend broccoli for 60 sec Pour broccoli through strainer into bowl More cooking time = Less vitamin C Fill medicine dropper with liquefied broccoli Count number of drops of liquefied broccoli needed to make indicator clear Steam broccoli and repeat procedure Boiled Broccoli Results How much liquefied broccoli (boiled for 2 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 2 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 4 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 4 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 6 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 6 Minutes) was needed to make the starch-iodine indicator turn clear? Steamed Broccoli Results How much liquefied broccoli (steamed for 2 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 2 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 4 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 4 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 6 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 6 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 8 minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (steamed for 8 minutes) was needed to make the starch-iodine indicator turn clear? 1.70 mL Straw Broccoli Steaming Pot 1.84 mL 1.98 mL How much liquefied broccoli (boiled for 8 Minutes) was needed to make the starch-iodine indicator turn clear? How much liquefied broccoli (boiled for 8 Minutes) was needed to make the starch-iodine indicator turn clear? 2.54 mL 1.07 mL 1.10 mL 1.03 mL 1.00 mL Boiled Broccoli Data Boiled Broccoli Mean, Median, Mode, and Range. Steamed Broccoli Data Steamed Broccoli Mean, Median, Mode, And Range. Question Background Research Hypothesis Steaming is a healthier method of cooking broccoli than boiling.
Longer boiling periods greatly reduce the vitamin C content. > Significant outlier at 8 minutes (2.54 mL) No significant outliers observed Slope Unit: mL of Lieuquefied Broccoli/Time (min) Slope Unit: mL of Lieuquefied Broccoli/Time (min) Percent Change
If boiling time increases by 300% then the mL of broccoli is increased by 49.41% Meaning of the slope (boiled)
2-4 min = + 0.14 mL Meaning of the slope (steamed)
2-4 min = + 1.07 mL Boiling Experiment Predictions
4 minutes: Y = 1.846 mL (Proven)
9 minutes: Y = 2.716 mL (Unproven) Slope Equation (boiled)
Y = 0.174(X) + 1.15 Slope Equation (steamed)
Y = -0.02(X) + 1.14 Steaming Predictions
4 minutes: Y = 1.06 mL (Proven)
9 minutes: Y = 0.96 mL (Unproven) Observations Analysis
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