The experiment begins by softening up the dialysis tubes by soaking them in a beaker of water. When softened‚ rub the dialysis tubes between your fingers to reveal the opening and clamp the opposite end. Add 10 mL of the appropriate solution to each bag‚ squeezing the air out of the tube to make sure there are no air bubbles when clamping
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Egg Lab Report Introduction: An egg is a model of a human because the egg has a cell membrane like humans do inside and outside of the body that let things pass through like water. We can use eggs to study the effect of changes in the external environment on the internal environment by having harsh environments like putting the egg in only alcohol and see what happens to the inside of the egg. Diffusion is the movement of a substance down its concentration gradient from a more to a less concentrated
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Biology 160 Lab Manual Tacoma Community College Last update 06/03/2013 This page left intentionally blank Table of Contents Table of Contents i Laboratory 1: Principles of the Scientific Method 4 In-Lab Report Sheet 12 This page has been left intentionally blank 27 Laboratory 2: Scientific Methodology & Enzyme Activity 28 In-Lab Report Sheet 28 Objectives 33 Introduction 33 Parts of the Swift M5 Microscope 33
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where k = torsional stiffness of the shaft Rearrange Equation 2 ( [pic] .………..……... ( Equation 3 ) where natural frequency of the system‚ [pic] …..…….…..……... ( Equation 4 ) From Simple Theory of Torsion‚ [pic] where T = Applied torque J = Polar second moment of area [pic] = Shear stress R = Radius of shaft G = Shear modulus [pic] = Angle of twist
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Abstract: This report presents the reason why the ocean does not freeze in the winter. Since the ocean consists of salt water‚ an experiment was done to test the effect of freezing on salt water compared to pure water. The experiment was conducted three times in order to obtain accurate results and eliminate errors. In addition to the salt and pure water experiment‚ a variation of this experiment was created to test other options. In the variation experiment the effect of freezing on sugar water
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DEPARTMENT OF CHEMICAL ENGINEERING University of Engineering & Technology‚ Lahore Mass Transfer Lab Introduction Separation equipments account for a major part of the capital investment in process industry. Fundamental laws governing the design and operation of these equipments are covered in the course “Mass Transfer”. The purpose of this lab is to introduce the undergraduate students with the most important separation equipments in the process industry‚ and provide a hands-on training of
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According to the data from both the lab group and the class average‚ there is evidence that osmosis did occur in the bags. The largest change in mass was in the 1.0M sucrose bag the mass went from 12g initially to 14.2g‚ this gained 2.2g‚ an 18.3% change in mass for the group data over the duration of the experiment. The 0.2M bag went from 10.2g to 10.9g a 6.9% change in mass; the 0.4M bag went from 12.1g to 12.2g .83% change in mass; the 0.8M bag went from 10.9g to 12.2g and an 11.9% change in
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Procedure Diffusion Jaydon‚ Jacob and Tyler obtained a 30 cm piece of dialysis tubing and cut 2.5cm off of the 30cm piece and soaked it in water. Then they tied one side off to form a bag. They then rubbed the other end of the bag to open it up and then are able to fill the bag with solution. The next step of the lab was to test for the presence of glucose in a 15% glucose and 1% starch. Then they took the 15% glucose and 1% starch and took 15 mL and placed them in enclosed bags. Jaydon‚ Jacob
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this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area. Facilitated diffusion is the
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Part A: Diffusion on a liquid in a liquid. I did an experiment with three different glasses of tap water from the faucet. All three cups measured the same which happened to be 13 cm from the top of the cup to the bottom of the cup. I let the water settle‚ and sit for about an hour so the temperature was the same for all three cups. I then placed one drop of food coloring into the first glass and waited for the coloring to reach the bottom. I calculated 93 seconds. I then went to the second glass
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