Observe after at least 5 minutes. For a closer examination, use the glass rod, popsicle stick or toothpick to hook the precipitate. * Step 6 – Pour the liquids down the sink and clean the rest of the equipment. Read more at Suite101: How to Extract DNA From Fruit and Vegetables: A Home Experiment for Viewing Real Deoxyribonkucleic Acid http://www.suite101.com/content/how-to-extract-dna-from-fruit-and-vegetables-a76806#ixzz1EkVq2LaJ Theory The mashing breaks the cells apart. The detergent breaks them open, freeing the cell contents (including the DNA).
Students at the University of Georgia have taken it upon them to test this rumor and see if carb-cutter really stops the breakdown of starch to helps weight loss. Biology 1103 Lab students used a fairly simple experiment containing two solutions. The first solution contained carb-cutter and the controlled solution did not contain any carb-cutter. Amylase, starch, I2KI, and TRIS were also added. With these solutions, the students were able to test whether not the amylase continues to break down starch with the presence of the carb cutter.
Dip the slide into Eosin solution for 7 times and remove the excessive solution with a paper towel. 3. Dip the slide into new methylene blue for 9 times and remove the excessive solution with a paper towel. 4. Use the incinerator to allow it to dry completely.
The reagent we use is Benedict’s reagent. Reducing sugar will show positive result while non reducing sugar will not. To test the presence of starch in our next food test, iodine is use. When starch is present the iodine added on it will change its colour from yellow to blue black. For the food test that use to determine the of presence protein we use Biuret test instead of Million’s Test.
This drink is best served in a glass jar with the strawberries and basil leaves floating on top. Ingredients • 1 cup basil leaves • Tea bags • 4 cups Boiling water • 10 large strawberries (chopped) • Crushed ice Instructions • Place the tea bags in the boiling water and discard them after 15 minutes • In another container, boil 1 cup water along with the basil leaves and some sugar. Simmer for 10 minutes. • Remove this container from the fire and add the strawberries. Now refrigerate until chilled.
Hypothesis My hypothesis is that the volume of carbon dioxide released from the yeast will be high when it is respiring with glucose and fructose, but with lactose, as it is a disaccharide and the yeast does not contain the enzyme lactase, which is needed to break lactose down. Method 1. For each repeat, the 3 boiling tubes were set up in a test tube rack, each containing 4cm3 of 30% yeast solution and 4cm3 of the 15% sugars: glucose, fructose and lactose. 2. 5 drops of Janus Green solution was then added to the substrate, in order to indicate when the substrate would begin anaerobic respiration.
The third test will utilize thin layer chromatography to evaluate the purity of the aspirin as well as testing for the presence of leftover salicylic acid or other by products of the reactions. Experimental: Week 1: For the synthesis of the aspirin, 250 mL of water was boiled. 1.5 g. of salicylic acid were poured on a test tube. Then, 3.5 mL of acetic anhydride and four drops of 85% phosphoric acid were added. A cotton ball was placed to prevent vapor escape.
4. Write down the data in the notebook for further use. Cold water (0°C) : 1. Add water to the beaker filled with ice and wait for 5 minutes. 2.
Sugar is used for energy and artificial sugar is basically a no calorie sugar, known as artificial sweeteners. Sugar also known as sucrose has 4 calories per gram and Sugar substitutes are also known as artificial sweetener and are used to limit food energy during dieting, to reduce the calories in food and drinks, to reduce the formation of dental plaque, and to help regulate blood sugar levels in diabetic individuals. You’ll find approximately around 5-6 artificial sweeteners at your local grocery store, such as Equal, Sweet N’Low, Splenda, NutraSweet, Sunette (Grimes, 2008). Artificial Sweeteners may be natural products such as sorbitol or xylitol, and like saccharin, sucralose or aspartame. The USDA approved five of the following non-caloric sweeteners: saccharin, aspartame, sucralose, neotame, and acesulfame potassium (Zamora, 2011).
Then place the pint-sized Ziploc bag into the gallon sized Ziploc bag and seal carefully. Finally shake the bags until the mixture becomes ice cream, which takes about five minutes. Take the pint sized bag out of the gallon sized bag, open and enjoy. If you prefer another flavor besides vanilla add one fourth teaspoon of cocoa powder instead of one fourth teaspoon of vanilla to the mixture. Follow the rest of the recipe as directed.