Hi everyone,
We finished discussing cytology (study of cells) today and we also started exploring the transport in cells : How do substances enter in and out the cells? Your task is to review the material we did in class and apply the concepts you've learned in the lab investigation you'll be doing on Mon, Nov. 5th? Do you have any question regarding the pre-lab discussion we did today? Do you have question regarding your long term lab investigation: Observing Osmosis?
If you have any, please just post them. By the way, you may also post any interesting data or thoughts that you would like to share with your classmates.
Thanks and enjoy your experiments! Ms. Dimatulac
Wednesday, October 31, 2007
Saturday, October 13, 2007
NUTRITION PROJECT
Hi everyone,
You'll find further info below regarding the calculation of the amount of calories for your nutrition project. Also, I know that the first website given in your hand-out is momentarily removed, so use the USDA.gov website.
All the best, Ms. Dimatulac
USRDA guidelines for consumption of caloric dense nutrients
Nutrient
Percent of calories from diet
CHO
55 %
PRO
15 %
FAT
30 %
Thus if one were to consume a 2200 calorie / day diet the number of calories per nutrient category should be:
Nutrient
Calories from diet
CHO = 2200 * 0.55
1210 calories
PRO = 2200 * 0.15
0300 calories
FAT = 2200 * 0.30
0660 calories
2200 calories
Each of the nutrients which contain calories have a specific caloric density. The caloric density for carbohydrate, protein and fat are listed .
CHO = ___4___ calories per gram ( 4 cal/g)
PRO = ___ 4___ calories per gram ( 4 cal/g)
FAT = ___9___ calories per gram ( 4 cal/g)
** Alcohol has 7 cal/g
Using the 2200 calorie diet above, the number of grams needed to be consumed to meet the USRDA requirements are as follows:
CHO = 1210 calories divided by 4 cal/g = 302.5 g
PRO = 0300 calories divided by 4 cal/g = 75 g
FAT = 0660 calories divided by 9 cal/g = 73.3 g
Interpreting Food Labels
When calculating calories from food labels , the label will provide information on the gram weight of the nutrient per serving. Note how the following values are calculated. Practice calculation:
A single serving of a food product has 31 grams of CHO, 5g of PRO, and 13g of FAT. What is the total caloric value of a single serving?
CHO = 31g * 4 cal/g = 124 calories
PRO = 05g * 4 cal/g = 020 calories
FAT = 13 g * 9 cal/g = 117 calories
TOTAL CALORIES = 261
What is the percent fat of the product ?
FAT calories / Total calories = percent fat
117 / 261 = 44.8 % fat
Is the product "low fat"? Why or why not ?
No, because in order for a food to be considered low fat , the percentage of fat in the product must fall at or below 30% of the total caloric density.
You'll find further info below regarding the calculation of the amount of calories for your nutrition project. Also, I know that the first website given in your hand-out is momentarily removed, so use the USDA.gov website.
All the best, Ms. Dimatulac
USRDA guidelines for consumption of caloric dense nutrients
Nutrient
Percent of calories from diet
CHO
55 %
PRO
15 %
FAT
30 %
Thus if one were to consume a 2200 calorie / day diet the number of calories per nutrient category should be:
Nutrient
Calories from diet
CHO = 2200 * 0.55
1210 calories
PRO = 2200 * 0.15
0300 calories
FAT = 2200 * 0.30
0660 calories
2200 calories
Each of the nutrients which contain calories have a specific caloric density. The caloric density for carbohydrate, protein and fat are listed .
CHO = ___4___ calories per gram ( 4 cal/g)
PRO = ___ 4___ calories per gram ( 4 cal/g)
FAT = ___9___ calories per gram ( 4 cal/g)
** Alcohol has 7 cal/g
Using the 2200 calorie diet above, the number of grams needed to be consumed to meet the USRDA requirements are as follows:
CHO = 1210 calories divided by 4 cal/g = 302.5 g
PRO = 0300 calories divided by 4 cal/g = 75 g
FAT = 0660 calories divided by 9 cal/g = 73.3 g
Interpreting Food Labels
When calculating calories from food labels , the label will provide information on the gram weight of the nutrient per serving. Note how the following values are calculated. Practice calculation:
A single serving of a food product has 31 grams of CHO, 5g of PRO, and 13g of FAT. What is the total caloric value of a single serving?
CHO = 31g * 4 cal/g = 124 calories
PRO = 05g * 4 cal/g = 020 calories
FAT = 13 g * 9 cal/g = 117 calories
TOTAL CALORIES = 261
What is the percent fat of the product ?
FAT calories / Total calories = percent fat
117 / 261 = 44.8 % fat
Is the product "low fat"? Why or why not ?
No, because in order for a food to be considered low fat , the percentage of fat in the product must fall at or below 30% of the total caloric density.
Subscribe to:
Posts (Atom)
