I predict all three contain starch and my experiment will prove this prediction. The solution Iodine-Potassium Iodide known as IKI can be useful in identifying if a food contains starch. If the food or any item contains starch the IKI solution will change to a dark purple or black color. If Iodine-Potassium Iodide (IKI) is sprayed on a sample of apples, potatoes and saliva it will reveal that they all contain starch. Materials and Methods: The materials that were used in this experiment was tap water, a saliva sample, 6 paper towels, 2 kitchen knives, a cutting board, 30mL of starch (liquid), a permanent marker, a ruler, 2 spray lids, a 2oz empty bottle, a 100mL graduated cylinder, 2 food products (e.g., ginger root, apple, potato, etc.)
Diffusion Across a Plasma Membrane In order to demonstrate the way in which semipermeable membranes work, an experiment replicating the digestive system of a caterpillar was preformed. To simulate a semipermeable membrane dialysis tubing was used. It is capable of demonstrating the way in which a semipermeable membrane will allow only molecules under a certain size to pass through it. First, to simulate the crop of the caterpillar, a small beaker was filled with four pipettes worth of cooked starch as well as four pipettes worth of alpha amylase solution and stirred. The cooked starch acts as the food, which the caterpillar would eat, and the alpha amylase, which is a digestive enzyme common in saliva, is stirred with it to simulate the chewing and mixing of food and saliva which constitutes the first step in the digestive system.
Experiment 11 Lab Assignment Answer Sheet: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound The "rf" value is the distance the compound moves relative to the distance the solvent moves. Data and Observations: Record the distance travelled by the sample and the solvent in the table below and calculate the Rf values. Table 1. Color Distance(m Blue1 Blue2 Red3 Red40 Yellow5 Yellow6 33 3 10 22 42 30 .55 .05 .17 .37 .70 .50 m) Rf Solvent 60 Table 2. Kool-Aid®: Grape Kool-Aid®: Strawberry Distance (mm) Red: 5 10 Distance (mm) Blue:17 n/a Rf .08 and .28 .17 Substance Solvent 60 Table 3.
Foods made from milk that retain their calcium content are part of the group 2) Identify sources of essential nutrients • Carbohydrates - fruits, breads and grains, starchy vegetables and sugars • Protein – meat, fish, cheese, tofu, beans, lentils, yogurt, nuts, and seeds • Fat – omega-3-rich foods like fish, walnuts and vegetable-based oils • Vitamins –citrus fruits, strawberries and peppers • Minerals –bananas, potatoes and tomatoes. • Water – water , vegetables, fruit, meat, fish, eggs, soups 3) Explain the role of essential nutrients for health • Carbohydrate - supplies energy ,assists in the utilization of fats • Protein - helps build and repair body tissue, helps build antibodies • Fat - supplies energy, aids in the absorption of fat-soluble vitamins • Vitamins - Vitamins help to regulate chemical reactions in the body • Minerals - contains calcium and magnesium are important for bone structure, and
Lab Report for Experiment #9 Caloric Content of Foods Purpose: (copy from lab; 1 point) • To measure the energy content of various food items, and • To become familiar with energy units like calories and joules Describe any changes to the procedure here in detail here: For example: I weighed the marshmallow directly without the holder. Or I used the following food instead: The food items that I used for this experiment were mini marshmallow, a peanut, and small potato chip. Observations: Keep notes on any observations you make while working on this experiment, copy them into the space below. Be detailed. The mini marshmallow burned very quickly, but did not burn all the way.
When the indicator comes in contact with the substance, the indicator’s color corresponds to the substance’s approximate change. Hypothesis: If I test the pH of household items with the red cabbage, then the solution will undergo a physical change. Household Liquid | Color Guess | Approximate pH Guess | Apple Cider Vinegar | Purple | 3 | Mouthwash | Green | 9 | Baking Soda | Green | 11 | Cream of Tartar | Red | 2 | Detergent | Violet | 6 | Lemon Juice | Red | 2 | Denture Cleaner | Blue | 8 | Materials: * * (1) Red/Purple Cabbage * Boiling Water * Pan * Strainer * Large Container * 7 Bowls or Cups * Spoons * Lemon Juice * Apple Cider Vinegar * Mouthwash * Cream of Tartar * Baking Soda * Detergent * Denture Cleaner Tablet Procedure: 1. Cut and dice about half of the cabbage and place into a pan with water. 2.
NATURAL RESOURCES: Nuts, figs, seeds, dark-green vegetables, wheat bran, avocados, bananas. IRON: Present in all cells; one of the constituents of hemoglobin which carries oxygen to the tissues by blood circulation. NATURAL RESOURCES: Liver, meat, raw clams, oysters, oatmeal, nuts, beans, wheat germ. IODINE: Aids thyroid gland and prevents goiter; helps burn fat; converts carotene into Vitamin A; aids absorption of carbohydrates from small intestine; promotes growth; regulates energy production; maintains hair, nails skin and teeth. NATURAL SOURCES: Kelp, seafood, vegetables.
The supply of solar energy demeans the supply of fossil fuels when compared. The unlimited supply does not pose the same destructive effects to the environment and health. Solar energy, according to Klare (2010) “is clean, green, safe and smart” (p. 12). Solar energy provides efficiencies because it does not need the current volume of resources needed today to generate power. The predominant draw back to relying on solar power it that it will take a dedicated plan over 40 years to complete.
The company Carbon Gold who will help to create the product, states that it is an effective way of removing carbon dioxide from the atmosphere. The decomposing charcoal is used as a fertilizer to nourish the soil. This process will also help to get rid of unwanted waste, and helps make the Maldives people less dependent on imported fertilizers. The president of Maldives, Mohamed Nasheed stated that his country wants to be carbon neutral by the year 2020. Although this project is creating positive result, many people are still not sure of the value it would bring to Maldives.
Although it is not an allergic reaction, but is actually an intolerance like some people have with lactose. While many people say that certain food colors causes hyperactivity in children the FDA has found no proof to that claim. The value of food coloring is astronomical. Why do pills have coloring to make them blue or purple? Because its soothing and it makes you feel safer taking it.