Name and Course Section: Avital Gershtein‚ Section 701 Title: Aseptic Technique & culturing Microbes - Lab # 4 Purpose: The purpose of this experiment is to Learn and employ aseptic technique‚ to become familiar with basic requirements of microbial growth‚ to learn the basic forms of culture media‚ and to become familiar with methods used to control microbial growth. Bacteria Growth pattern after 24 hours Growth pattern after 48 hours L. acidophilus in liquid MRS broth No growth Amount of sediment
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esterification reaction that was carried out in this lab is shown in figure 1. It worth mentioning that the by-product of such reaction is water. In organic chemistry‚ the reaction in which water molecule is released is known as condensation reaction (Hornback‚ 2006). Figure1 is drawn using Chem Sketch software. a) b) Figure 1: Typical Fischer esterification reaction (a) in comparison to the specific esterification reaction used in this lab (b) The reaction can also be categorized in terms of
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Introduction The purpose of this lab is to determine the percent mass of Cu in a penny and see if the fabricator that makes the planchets for the government is using the correct amounts of Cu in the pennies. The composition of a standard penny is 97.5% Zn and 2.5% Cu. In the lab we will be using Beer’s Law (A=elc+b where A is solution absorbance‚ e is a constant called molar absorbency‚ l is the length in cm‚ and c is the concentration). Using Beer’s Law in this lab a colorimeter is used to find the
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as part of the lab. The Iced Tea Debate The Salty Soup The Fire Bug 2 Use the DATA chart provided for recording observation based on three demonstrations you will watch 3 Watch each part of the experimental demonstration and make preditions about wht will happen in each scenario . Record your preditions and observations in the Data an Observations section of your labatory report format. Problem: How can matter and energy be described in avarity of systems? Analysis : Use your data
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Lab 4 Part 1: 10 points Assignment: Create an Internet and E-mail Acceptable Use Policy Learning Objectives and Outcomes Research and compare Internet and e-mail use policies enforced by other organizations. Create an Internet OR e-mail use policy for an organization. Assignment Requirements You are a networking intern at Richman Investments. An employee of the company used employer-owned equipment to access the Internet and check his personal Web-based e-mail account. He followed a
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of the Oreos. (DSO cream/Reg. cream) Results (Data): original DS 1 cookie 11.46 15.29 cream 2.96 6.79 Error: -Not cleaning the cream off the wafers. -Human Error -Rounding the weight of the Oreos. Analysis: Our hypothesis was confirmed. The purpose of this lab was to find out if Double Stuffed Oreos are actually double the filling. The results showed that the mass of the filling was a little more than double the regular Oreos. There were no trends because we’re only testing
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Lab #1: Projectile Motion Purpose: To determine experimentally the initial and final velocities of an air powered projectile. Hypothesis: If the angle of the rocket is launched at 45 degrees than the distance and velocity will maximize. Materials: Rocket launching platform Rocket launcher Rocket body Air pump Safety goggles Rubber washer Nose cone 40‚ 45‚ 50‚ 55 and 60 angle wooden blocks Measuring wheel Procedure: 1. The rocket was assembled by the rocket launcher
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volume‚ mass‚ and density of objects and liquids. Time Allocation: Allow 2 hours for this experiment Materials Materials Student provides Label or Box/Bag Qty 1 1 1 1 1 LabPaq provides Auxiliary Supplies BagCK1 © Hands On Labs‚ Inc. 1 1 1 1 1 1 1 1 1 1 1 LabPaq CK-1 Item Description Table salt Piece of string Isopropyl (rubbing) alcohol Tap water Paper‚ 5 cm x 5 cm for weighing chemicals Beaker‚ 100 mL‚ glass Cylinder‚ 25 mL 25-mL volumetric flask
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Collision Lab Simulation Purpose: To study elastic and inelastic collisions in one-dimension. Background Information: Momentum: is a measure of mass in motion. It is the product of mass x velocity. Conservation of Momentum: in the absence of external forces‚ such as friction‚ the linear momentum of a system remains constant. Procedure: 1. Open web browser and go to the site: http://phet.colorado.edu 2. Click “play with sims”‚ then “physics”‚ and then “motion” 3. Find the “Collision Lab” 4
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Effects of Enzyme Catalysis of H2O2 by Catalase Report by: Timmy Lin (#269164729) October 17‚ 2011 Mr. Rienzi AP Biology Problem: Measuring the effects of Catalase enzymes on hydrogen peroxide decomposition. Measuring the rate of the reaction when hydrogen peroxide and Catalase are mixed at the same ratio for different time (10‚ 20 30 60 120 180 360 seconds). Background: Enzymes are biological catalysts that carry out cellular metabolic processes with the ability to enhance the rate
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