Post on 07-Jan-2017
Relationship between pH and Vegetable DigestionEvan Chen, Karina Zeng, Vivian So, Wilson Li
To what extent does the pH level of vegetables affect the rate of enzymatic activity as measured by time it takes for amylase to digest vegetable juices?
Personal Engagement
Explanation of Starch and Digestion
Bond is broken to make Maltose and Glucose through digestion
Variables-pH-Rate of starch digestion
Setup
Measuring the Digestion Rate – Refractive Index/Brix Index
Results
4 4.5 5 5.5 6 6.5 70.00%2.00%4.00%6.00%8.00%
10.00%12.00%14.00%16.00%18.00%
R² = 0.0429448898051679
pH vs. Starch Concentration for Var-ious Vegetables
pH
Perc
ent
Star
ch C
once
ntra
tion
CauliflowerCarrots Broccoli
Sweet PotatoPotato
Canned Corn
“
”
There is no correlation between pH and rate of vegetable digestion.
Significance
Improvement 1: Vegetable Juice Concentration
Improvement 2: Vegetable Quantity
Improvement 3: Concave Mirror
Improvement 4: pH Measurements too close to 7
Resources
http://www.sciencebuddies.org/science-fair-projects/project_ideas/FoodSci_p049.shtml#procedure
http://www.picse.net/GROWSMART/docs/orangeJuicePrac.pdf http://chemwiki.ucdavis.edu/Core/Biological_Chemistry/Carbohydrates/C
ase_Studies/Starch_and_Iodine http://foodsafety.wisc.edu/business_food/files/approximate_ph.pdf http://thepaleodiet.com/fruits-and-sugars/