as using benedict solution to test the presence of reducing sugar‚ using copper II sulphate to test the presence of protein‚ using K3( to test the presence of fat. However in this experiment‚ not only are the milk tested for its composition‚ the amount of the particular substance such as reducing sugar‚ protein and fat is also tested by observing the intensity of the colour change. Apparatus Test tube‚ magnifying glass‚ test tube rack‚ dropper‚ cork‚ water bath. Materials Benedict solution
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Biuret Reagent 15. Iodine 16. Benedicts Reagent Methods In this lab there are I complete two different tests. The procedure was relatively the same for each test. I would first add 3ml of a given substance to a test tube‚ followed by 5 drops of either Biuret Reagent or Iodine. Once the agent is added‚ I swirled the two substances and then observed the results. The first was to test proteins‚ and the second‚ was to test starches. In the first test‚ Proteins‚ I used biuret reagent to determine
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Food Test 1: Test for Glucose – with Benedicts solution Benedicts solution is used to test for simple sugars‚ such as glucose. It is a clear blue solution of sodium and copper salts. In presence of simple sugars‚ the blue solution changes color to either green‚ yellow or brick-red‚ depending on the amount of sugar. Method 1) Mix smalls amount of each food sample (i.e.‚ Egg lumen‚ cylindrical piece of potato tuber‚ bread crump and crisps) in different test tubes with distilled water to make a
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each test tube. 6. Place the test tubes in the boiling water bath for 3 minutes. Remove the test tubes using test tube holders. 7. A rusty brown color in response to Benedict’s Solution indicates a large amount of simple sugars. Table 5.1 Benedicts Test | Results: Positive results color change of red/orange for Carbohydrate | contents | Initial color | Color after heating | conclusion | Distilled water | blue | blue | neg | glucose | blue | red | pos | maltose | blue | red | pos |
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Arianna Montoya Osmosis and Diffusion Lab Report Background Information: Diffusion involves the movement of solute particles across a selectively permeable membrane from higher to lower concentrations. A selectively permeable membrane allows only some thing to go through. Water and oxygen are examples of molecules that are able to go through the membrane
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oats‚ and other staple foods. www.LabPaq.co !4 ©Hands-On Labs‚ !! !! ! ! ! !! !! ! !! Experimen ChemiCal Basis of Exercise 5: Testing Breakfast Cereal Observations: ! Material tested Data Table 5: Cereal testing results biuret reagent Benedict’s reagent
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Today‚ we have to learn basic laboratory techniques‚ such as handling the reagents‚ using Gilson pipettes etc‚ study and try to identify chemical tests for food compounds. Materials and methods Reagents Monosaccharaides (glucose‚ fructose‚ maltose)‚ sucrose (disaccharide) Starch (polysaccharide)‚ egg albumin (protein) DCPIP‚ Vitamin C Olive oil + Sudan III Ethanol (highly flammable) Iodine solution (irritant) Benedicts reagents KOH + CuSO4 HCl (irritant) Honey solution Apple juice solution Milk solution
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cell membrane. 3. Materials: Dropper bottle of water Compound microscope Dissecting needle Carmine powder Slide and coverslip 3 test tubes Transfer pipets 2 400 ml beaker 30 cm moist dialysis tubing 500ml beaker Hot plate Benedicts reagent I2KI solution starch solution Wax pencil 30% glucose solution String or rubber band Test tube rack Slides and cover plates 4. Methods and Procedures: Experiment 1: Prepare a slide of dry carmine and water and cover slip Put under
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biological molecules. These tests take advantage of the fact that different types of molecules have different functional groups and‚ therefor‚ different chemical properties. Thus‚ they will react to test reagents (also called indicators) differently. Materials: Biuret‚ Sudan III‚ Iodine‚ Benedict‚ water‚ hot plate‚ paper towels‚ pipette‚ ruler‚ goggles‚ and a timer. Method: Benedict’s test for reducing sugar: 1. Ruler was used to mark 1 cm and 2 cm marks on each tubes. 2. Negative control tube
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eye piece‚ body tube‚ arm‚ nosepiece‚ objectives‚ stage clips‚ mechanical stage‚ diaphragm‚ condenser‚ fine and course adjustments‚ light stage‚ base Protein‚ peptide bond‚ simple sugar‚ polysaccharide‚ lipid‚ adipose tissue Biuret reagent‚ iodine‚ Benedict’s reagent‚ Sudan IV‚ spot test Positive control‚ negative control Eukaryote‚ prokaryote‚ yeast‚ budding‚ cilia‚ pseudopod‚ chloroplast‚ nucleus‚ cytoplasmic streaming‚ chromoplast‚
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