Roy Levin Bio 11 Lab Dr.Izquierdo Analysis of Macromolecules in Tissue Homogenates of Bos taurusMaterials and Methods The homogenates provided were made by homogenizing tissues in a sucrose phosphate buffer in a 1:20 ratio. The protein concentration in bovine cells was measured by diluting the homogenate with a 1:5 ratio; 50 microliters of homogenate and 200 microliters of water. Then 5 known protein concentration samples which were 0.4‚ 0.8‚ 1.2‚ 1.6‚ 2.0 mg/ml of bovine serum were used to
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The Effect of Osmosis on a Potato Cell October 12th 2012 Osmosis Lab Purpose: The purpose of this lab is to investigate the effects of osmosis on a potato cell as it is immersed for a period of time in solutions of different water concentrations. Hypothesis: If the potato is immersed into the distilled water‚ then it will be the heaviest out of the three. This is because water is at the lower is moving toward the area of higher concentration‚ which in this case is the potato. This
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Coulomb’s Law Purpose: The purpose of this lab was to demonstrate that the force between two stationary charges is directly proportional to the product of the charges and inversely to the square of the distance between them. Coulomb’s law tells us that the force between two charges depends (1) linearly on the strength of each charge‚ and (2) inversely on the square of the distance between them. Mathematically we would write this as . Procedures Part1 Begin by removing the right side
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Lab Report Background Information: Magnesium is an alkaline earth metal that has the symbol Mg. Magnesium is a fairly strong‚ silvery-white‚ light-weight metal (one third lighter than aluminum). In a powder‚ it heats and ignites when exposed to moisture and burns with a white flame that is harmful to the eyes. It is difficult to ignite in bulk‚ but once ignited‚ it is difficult to extinguish. Magnesium Ribbon is a long strip of magnesium metal about 3 millimeters wide and 10 meters long with
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A The % Composition and Empirical Formula of a Hydrate: It Doesn’t Hold Water‚ Or Does It? 1. To determine the percent water in an unknown hydrate. 2. To calculate water(s) of crystallization for an unknown hydrate. 3. To determine the formula of an unknown hydrate. OBJECTIVES SKILLS Proper use of the following equipment: Dial-O-Gram balance (Laboratory Technique I)‚ electronic balance (Laboratory Technique II) and Bunsen burner (Laboratory Technique III). Dial-O-Gram balance‚ electronic
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Title: Acetone Lab Purpose: Use Table M and various indicators to determine the pH of acetone Equipment: Test tubes‚ test tube rack‚ acetone‚ various indicators‚ tweezers Procedure: 1. Fill each test tube with a few drops of acetone 2. Put 2 drops of an indicator into 1 of the test tubes 3. Record color change 4. Determine the pH range based on the color change using Table M and record data 5. Repeat for each indicator 6. To test litmus‚ dip red and blue litmus into acetone and determine
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THE LANGER LAB CASE written by Stefano Cioccari (matricola RM11246) After reading the case in question‚ in my point of you‚ I can underline three main key points. First of all‚ it is instrumental to emphasize the figure of Robert Langer. He’s able to attract to himself very successful people‚ as Edwards said: “he attracts stars”. Himself is a successful man both on academic and in the scientific and commercial field‚ not forgetting he has received a dozen of rejected on his career. A recommendation
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Instructions: ➢ Everything that is written in red needs to be erased or replaced by your text. ➢ Use the hand outs and photocopies I have given you as a guide‚ but do not copy everything. The IB Lab Report Title – Be certain it reflects clearly what is being done in the lab. 1. Introduction In this section‚ include the background/theoretical information on which your investigation is based. Explain the theory behind the experiment or maybe how this experiment models what you
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Titrations are also often used to determine the pH of a solution. This is important because without knowing how acid or basic a solution is people could hurt themselves and others but mixing chemicals together that are lethal. The objective of the is lab is to develop familiarity with the concepts and techniques of titration and to determine the concentration of an acidic acid solution. It was necessary to add Phenolphthalein because it acts as an indicator‚ that is a weak acid‚ so it is easier
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This lab has introduced the use of daphnia‚ pill bugs‚ amoeba and Uglena. We the AP Biology students were first introduced to the test subjects to test his or her capability of handling living organisms for upcoming science experiments. The AP Biology students were asked to create original experiments for all test subjects testing reactions to gravity‚ light intensity and reaction to food. Daphnia‚ or Daphnia magna‚ are microscopic organisms in which the students created an original lab to test
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