PART ONE: GENERAL BACTERIA IDENTIFICATION Review the dichotomous key in Figure A‚ the bacterial shapes in Figure B‚ and the Gram stain information below. You will use all three to determine to which major group unknown bacteria belong. Gram Stain Results: Purple = Gram positive Red = Gram negative Neither purple nor red = No cell wall (neither Gram positive nor Gram negative) Review Figure C on the following page. Use Figure C to identify the type of arrangement displayed by the unknown
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the procedure. Be sure that the data table is neat and organized and that all measurements have the correct significant figures and units. (3 points) Table of Masses Empty Dish NaHCO HCl+NaCO3 Final (Dish and Salt Product 24.35 (grams) 10.06 (grams) 40.06 (grams) 31.52 (grams) 2. Write the complete balanced equation for the reaction that occurred in this lab. Hint: H2CO3 is not a final product of the double-replacement reaction; it breaks down (decomposes) immediately into two products. (3 points)
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400.2 grams Mass of Ring=1‚430.8 grams Radius of Disk= 11.4 cm Inner radius of ring= 5.45 cm Outer radius of ring= 6.25 cm Friction mass=5 grams radius= 0.845 cm = Trial (mass of pan + mass added) acceleration Experimental value of inertia 1 20 grams 0.1 cm/ 139‚934.62 g 2 40 grams 0.2 cm/ 157‚ 410.38 g 3 65 grams 0.3 cm/ 139‚906.06 g Average 145‚750.35 g % Difference 3.92% TABLE 2: Mass of Disk=1‚400.2 grams Radius of Disk= 11.4 cm Friction mass= 5 grams
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15 cm for 2 grams of sugar added‚ to 26.83 cm for 128 grams added after six hours. The mixtures that contained 2 grams‚ 16 grams‚ 32 grams‚ 64 grams‚ and 128 grams all had the average circumference increase from six hours to twelve hours‚ whereas the mixtures containing 4 grams and 8 grams decreased; however‚ after 12 hours‚ the mixtures containing 2 grams and 16 grams began to decrease along with the 4 gram and 8 gram mixtures. The balloons on the mixtures containing 2 through 16 grams continued decreasing
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identification of a mixed culture of Gram-negative and Gram-positive bacteria 2. Author: Nick Fiore‚ University of Kansas‚ Biology 402‚ Fall 2014 3:00pm room 6040 3. Abstract: The purpose of this experiment was to isolate two unknown bacteria and perform a series of selective and differential tests to correctly identify each. After the bacteria was isolated a series of differential and selective tests following the dichotomous key attached were used to identify each bacteria. The Gram-positive bacteria were
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1 McDonald’s vs. Subway Convenience or Health Darlene Freeman University Composition and Communication 1 August‚ 23‚ 2012 Karen Robinson
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(20 ml of water‚ 80 grams of sugar) 6) Make a hypotonic solution. (80ml of water‚ 20 grams of salt.) 7) Make an isotonic solution. (100 ml of water.) 8) Place one potato in each cup and record which potato goes in each cup. 9) Leave overnight 10) Next day‚ take out each potato slice one
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Trial 3 | Trial 4 | Trial 5 | Mass of cashew (in grams) | 1.00 g (± 0.01 g) | 1.00 g (± 0.01 g) | 1.70 g (± 0.01 g) | 1.40 g (± 0.01 g) | 1.50 g (± 0.01 g) | Mass of remaining material (in grams) | 0.60 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.50 g (± 0.01 g) | 0.80 g (± 0.01 g) | Mass of cashew that burned (in grams) | 0.40 g (± 0.01 g) | 0.70 g (± 0.01 g) | 1.40 g
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Small beaker (100 mL) | 47.0 grams | Large beaker (150 mL) | 82.4 grams | Mass of filter paper | 0.50 grams | Mass of coffee filter | 1.00 gram | 150mL beaker + 20mL water + lead nitrate solution | 96.1 grams | 100mL beaker + 20mL water + sodium carbonate solution | 64.2 grams | Watch glass | 32.2 grams | Precipitate + filter paper + coffee filter | 2.20 grams | Precipitate + 150mL + coffee filter | 84.1 grams | Uncertainty of electronic balance: ±0.001 grams Uncertainty of 100 mL
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The colors of the desert ran across the canvas of my mind‚ smudged from the water. Your vision was focused on the horizon‚ my eyes focused on you. That day we danced and ran and screamed till our lungs gave out‚ the desert mud staining the soles of our bare feet. Occasionally I believe I can still smell the rain‚ the mud‚ you. It is on days like these that I remember vividly‚ the colors of you violent and saturated. I feel the presence of you in the silence between morning and
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