The Tubes

Focus children: Arlo Resources: Small toy cars Long and short Cardboard tube tunnels Rationale: The cars and cardboard tube tunnel activity follows on from the play dough and cardboard tube tunnel experience on 2/11/2017. Arlo enjoyed this experience and he found ways to explore the play dough and the cardboard tube tunnels. This experience will allow him to continue his interest and enjoyment while providing more opportunities for him to play with cars. Objectives:…

Youngstown Sheet & Tube Co. v. Sawyer In the discussion of the Youngstown Sheet & Tube Co. v. Sawyer case was an leading case addressing the scope of inherent presidential power by which is the ability of the president to act without express constitutional or statutory authority. This case has to do with the separation of powers and the limits of presidential power. The case basically begin in the late of 195 when steel mill owners and their employees had disagreements over the terms of…

mimic the chemistry of digestion. The first one was to test for sugar. We used a dropper and measured 2 ml of maltose and 2 ml of benedict’s solution in a pyrex test tube. After, using a test tube holder, we placed the test tube in a boiling water bath and heated for 5 min. After the 5 min, using a test tube holder we removed the test tube from the water bath. We then repeated the same procedure using starch solution instead of maltose. When we did the test for digestion of starch. First, using…

portions from the tube was removed and placed into the labeled tubes. Based on the degree in color of each sample, a different absorption value would be obtained and used in correlation with a working curve of Absorption versus Time (in minutes) to better interpret the catalysis of enzymes in biological catalysis. Introduction In this experiment, the reaction occurs as the catalase enzyme increases the rate of the decomposition reaction of the substrate to…

label 10 test tubes #1- #10 and place them in order in a test-tube rack. Wash and rinse all of glassware with distilled water. Prepare a hot-water bath in a 250 mL beaker by filling it up to 150 ml and bringing it to a boil. Obtain 2 ml of the solution you want to test and pour it into test tube 1. To test the solution for Pb2+ and Ag+ ions, add 8 drops of 6 M HCl solution to Test Tube 1 and stir the mixture. If a white precipitate forms, then Ag+ and/or Pb2+. Centrifuge the test tube and add…

clear test tubes, bath them by hot water. Test 1a: put a known solution in tube 1 and add three drops of each of the 10 cation solutions. Add 8 drops 6 M HCl solution to tube 1 and do it one more time. If it forms precipitate, you should continue add HCl. Record this data on table 1a. Test 1b: Centrifuge the content of tube 1 and add a drop of 6 M HCl. If precipitate forms, you should continue add HCl until the supernatant remains clear. Centrifuge the tube 1 again and put them into tube 4.…

5 test tubes. • 1 beaker of Acid 1 beaker of water • 4-Litmus papers • 2 Pipette bulbs. • 1 robber stopper. • 1 Bunsen burner. • Q-tips(4). • Scoopula. Observation: Which substance is which? Hypothesis: All the unknown substances that we have are soluble in water. Procedure • We had a 4 test tubes filled with small amount of white powder. We labeled each test tube. For example the first test tube was labeled as “Substance A” , the second test tube as “Substance B’’, the third test tube as…

gene (actin) through PCR. Protocol: A. Isolation of Plasmid DNA from a Bacterial Culture: We were provided with a tube containing 1 ml of bacterial culture. We centrifuged it for 5 minutes at 10000 g. Then, we removed the supernatant by pouring it off and we used a small chem wipe to remove any excess media remained. Centrifuging will form a small pellet at the bottom of the tube. Using 250 l of cell resuspension solution, resuspend the cell pellet thoroughly by pipetting or vortexing. This…

Abstract The purpose of this investigation is to determine whether the temperature can affect the reaction rate of enzyme activity. The enzyme activity was measured by five different temperatures, separated in tubes which later got measured by their height of foam after 10 minutes. Freshly-prepared potato juice was used as the enzyme for catalase. Since temperature is measured by the kinetic energy of molecules, the higher the temperature, the more movement of molecules. The lowest temperature…

down. To begin the experiment 3 test tubes must be acquired; a boiling tube, large test tube and a small test tube. The large test tube must be completely dried with a paper towel and labeled R for Reactants. After that is done a piece of weighing paper should be placed on a balance and tared. After make sure the balance is correctly tared, a spatula must be used to collect 2 grams of granular Zinc on the weighing paper. The zinc is then added to the boiling tube. Using a different spatula weigh…