decompose. Theory: Equipment: * 4 x petri dishes * 1 x glass stirring rod * 0.1 mol/L silver nitrate in a dropper bottle * 0.1 mol/L Sodium chloride in a dropper bottle * 0.1 mol/L Sodium iodide in a dropper bottle Method: 1. Ensure you are wearing safety glasses 2. Take the petri dishes and label then 1‚ 2‚ 3‚ and 4. 3. Add 20 drops of silver nitrate solution to each petri dish. 4. Add 20 drops of sodium chloride to petri dish one and three. Mix with stirring rod
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middle of a petri dish containing water‚ the lower the concentration of caffeine added to the water‚ the more oxygen planaria will obtain. That increase in the oxygen level will consequently allow them to move faster from the middle to the edge of the dish‚ their favorite location.
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and 6% peroxide mixture Yeast Petri dishes Graduated cylinders Glass Beakers (size varies) pH 3.5 solution pH 11.5 solution Forceps Scoopula Scale Scissors Paper towel Timer/stopwatch Procedures: Place the petri dish on top of the scale. Zero out the petri dish. Pour in yeast until the measure of the weight is .3 grams while distributing it equally on the surface of the petri dish. Pour 10 mL of glucose per 0.1 grams of yeast into the petri dish. Allow 10 minutes for incubation
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a weak bacteria. Procedure Have three petri dishes prepared with blood agar‚ and three test tubes with 100 milliliters of milk. Label three test tubes‚ “A‚” “B‚” and “C.” With a toothpick‚ add a small amount of the E. coli specimen to tube “B"; shake the test tube to mix throughly. For test tube “C‚” add the same amount of E. coli and five millimeters garlic juice. Shake the test tube. Allow all test tubes to incubate for two hours. Mark the petri dishes “A‚” “B‚” and “C.” Use a syringe to
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After a few minutes turn the dish upside down. Let it stand at room temperature‚ or in an incubator‚ to allow the bacteria to grow. Observe the dish the next day and on several following days. Describe the color and shape of any bacterial colonies and other features you observe. Data and Observations While this picture that I have included
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transformation. We hypothesized that the bacteria will grow in petri dished 1‚ 2‚ and 4 (Figure 1). It is expected to see these three out of the four petri dishes contain growing bacteria; the fourth sample is predicted to die because they were untransformed cells in an ampicillin medium. Results: This experiment had four petri dishes containing the samples. They all had an LB medium. After being incubated overnight at 37°C‚ the first dish had the Ampicillin and transformed bacteria‚ the second had
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The results from the two petri dishes showed results that were anticipated. The Tap Water allowed the radish seeds to germinate with in the first 48 hours. In the petri dish labeled tap water‚ 10 out of 10 seeds sprouted into plant growth as seen in Figure 5.1. The radish plant growth within the tap water petri dish grew so well it started to lift the lid off the dish. The results from the Acid Rain (50% vinegar solution) did not allow any radish seeds to germinate. There were never signs of seed
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the sensitivity of Staphylococcus epidermis of specific areas on a petri dish. The antibiotics were gentamicin‚ novobiacin‚ and penicillin. This resembled a culture and sensitivity test that is preformed at the hospital’s laboratory to find out the resistance of a microorganism. This experiment was meant to use the naked eye and a magnifying glass when necessary. Procedures: This experiment called for prepared agar in a petri dish‚ smeared s. epidermis on the surface of the prepared agar‚ and a 3
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performed investigated if Dugesia prefer light or dark situations. Our group hypothesized that Dugesia would prefer the darker side of the petri dish more that the light side. This hypothesis was based on observations of the planarians before the experiment and the type of environment Dugesia are found in. We also noticed that the planarians preferred the edge of the dish‚ the most which is where the cover is the thickest allowing the least light through. We thought that the darker side would draw the most
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Constant Variable- The constant variable of my experiment is the agar used in my petri dishes and the brand of my dependent variable. Materials 5 Petri Dishes (prefilled) Clear desk tape Journal (to record data) 1 slice of bologna 1/2 tsp of ground cinnamon 1/2 tsp of ground black pepper
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