Bacterial Fermentation Secondary article Article Contents Volker Mu¨ller‚ Ludwig-Maximilians-Universita¨t Mu¨nchen‚ Munich‚ Germany . Introduction Under anaerobic conditions‚ in the dark and in the absence of electron acceptors‚ organic compounds are catabolized by strictly anaerobic or facultatively anaerobic bacteria by internally balanced oxidation–reduction reactions‚ a process called fermentation. In fermentation‚ the organic compound serves as both electron donor and acceptor‚ and adenosine
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measure the change in kinetic and potential energies as a ball moves in free fall. Since there is no frictional forces working on the ball the total energy will remain constant and the students will see how the total energy of the ball changes during free fall. HYPOTHESIS: 1. The ball has potential energy while momentarily at rest at the top of the path. 2. The ball contains kinetic energy while in motion near the bottom of its path. 3. Kinetic energy VS. Time Kinetic energy VS. Time
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GROUP 2 EXPERIMENT 15 BSP2M ORGANIC CHEMISTRY LABORATORY MR. WILBERT MORALES Chemical Structure Physical Properties Hazards Acetonephenone Physical state and appearance: Liquid. (Liquid.) Odor: Not available. Taste: Not available. Molecular Weight: 120.16 g/mole Color: Colorless to light yellow. pH (1% soln/water): 7 [Neutral.] Boiling Point: 201.7°C (395.1°F) Melting Point: 19.7°C (67.5°F) Critical Temperature: Not available. Specific Gravity: 1.03 (Water
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Abstract There are many methods employed to precipitate proteins out of solution. In this experiment we manipulated many physical and chemical variables in order to achieve purification of a protein via precipitation. In the first part of the experiment we purified the protein casein by modifying it’s pH. In the second part of the experiment we manipulated the ionic strength of albumin in egg whites‚ in a process called salting out. By manipulating these chemical properties we were able to
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the purpose of iodine in the Gram’s stain procedure? (What is a mordant?) The iodine helps set the stain by forming an insoluble crystal violet-iodine complex. Basically helps retain the crystal violet to the cell. E. What is the purpose of acetone-alcohol in the Gram’s stain procedure? It is a decolorizer that differentiates between gram-negative and gram-positive. Only the gram-positive bacteria will retain the crystal violet-iodine complex. Gram-negative bacteria will not retain the color
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access the degree of the alkyl halide formed (1° or 2° halide) and to determine whether Markovnikov’s addition occurred‚ two qualitative tests can be used: (a) reaction with alcoholic silver nitrate solution and (b) reaction with sodium iodide in acetone. For the silver nitrate test‚ one drop of alkyl halide is added to 2 mL of 0.1 M solution of silver nitrate in
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bristle)‚ and colors (metallic‚ non metallic‚ or ultraviolet reactive). Like spray paint these markers give off volatile organic compounds. Permanent marker can be removed using a dry erase marker on certain surfaces such as a whiteboard as it contains acetone. Alcohol based markers such as Sharpies are said to be safer‚ with water-based markers being the safest of all. The popular permanent markers are Sharpie‚ Stanford king size permanent marker‚ Marks a lot and Redi Mark +. Ingredients in the permanent
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3 Work‚ Power and Energy At the end of this section you should be able to: a. b. c. d. e. f. describe potential energy as energy due to position and derive potential energy as mgh describe kinetic energy as energy due to motion and derive kinetic energy as mv2/2 state conservation of energy laws and solve problems where energy is conserved define power as rate of energy transfer define couple‚ torque and calculate work done by variable force or torque solve problems where energy is lost due to friction
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Experiment #10 & #11 The Synthesis of Cobalt Oxalate Hydrate The Synthesis of a Nitrite Complex February 5‚ 2012 Chemistry 1211L - 146 - Spring 2012 Procedure The Synthesis of Cobalt Oxalate Hydrate Place 100 ml of distilled water in a 250-ml (or 400-ml) beaker. Add 1.26g of oxalic acid dihydrate (H2C2O4.2H2O) and 1 ml of concentrated ammonia. Stir the mixture until the solid has dissolved completely. Dissolve 2.34 g of cobalt chloride hexahydrate (CoCl2.6H2O) in 100 ml of water
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student)‚ 30% acetone in heptanes (3 mls/student)‚ 95% ethanol (20 mls/student) wk 4: 1‚3 diphenylacetone (0.5 g/student)‚ triethylene glycol (5 mls/student)‚ 40% benzyltrimethylammonium hydroxide/methanol (0.5 mls/student) Part A: Thiamine catalyzed condensation benzoin condensation of benzaldehyde Procedure: (Week 1) Dissolve
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