Chemicals in medicines Rakesh Mohan Hallen The words medicine’ and ’drug’ are often used in our country to mean the same substances: any substance‚ manufactured artificially‚ which can help recovery from sickness‚ relieve symptoms or modify a natural process in the body. A medicine is often a mixture of several chemical compounds. Even if it has only one active component compound often other substances are used as fillers or binders to give it bulk. Chemistry‚ the science related to chemical substances
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BIOLOGY LABORATORY Biologically Important Molecules Carbohydrates‚ Proteins‚ Lipids‚ and Nucleic Acids Objectives In this lab you will learn to: 1. Perform tests to detect the presence of carbohydrates‚ lipids‚ proteins‚ and nucleic acids 2. Recognize the importance of a control in a biochemical test 3. Use biochemical tests to identify an unknown compound Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living
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repeated using hexane as the solvent instead of water. Part II: Solubility Testing of the Halogen Make baseline observations of what each of the ions and molecules looks like in water and in hexane. First‚ 1mL of the aqueous (water) solution of iodine will be added to a test tube using a dropper in lieu of a graduated cylinder. Appearance of solution will be recorded. Then‚ 1mL of hexane will be added to the test tube mix. Observations of both layers will be recorded. Process repeated for bromine
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Biological Currency The objective of this lab is to figure out whether or not this money is counterfeit. We will attempt to find the information needed to prove that the money is counterfeit or not by looking at it under a microscope and by using iodine drops to compare the money’s result with the results of different items. Counterfeiting money is not a new to any country. It started when paper money was first made. Some countries attempt to counterfeit rivals money to drive their economy downward
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PLANNING COURSEWORK- STARCH AND AMYLASE AIM The aim of this coursework is to investigate the effect of temperature change‚ on the rate of hydrolysis of starch catalysed by amylase. PREDICTION I think that as the temperature increases‚ the rate of reaction also increases‚ to a point when it dramatically decreases. On graph 1‚ you will see a sketch of the graph which I expect to be the result of the experiment. SCIENCE REASONING I think my prediction is correct because the rate of
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polymer (Figure 1). The long chains of glucose that make amylose form a tight helix. If we mix an iodine solution with the amylose‚ the iodine will lodge itself in the interior of the helix. This causes the solution to turn a dark blue color. If the enzyme amylase is added to the solution first‚ it will chemically remove one glucose monomer at a time from the ends. Addition of iodine to this solution does not give a blue color but will be colorless (Distinguish between
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permeability against starch and glucose molecules. APPARATUS: 4 Test Tubes Cellophane Tubing Elastic Band 2 beakers Glucose solution Starch solution 2 Syringes Pipette Hot Plate. Test Tube rack. Benedict’s Solution Iodine Solution Safety Aspects Safety aspects that need to be considered during the experiment are to provide caution whilst handling benedict’s solution as it can be caustic to the skin and eyes. As a safety measure wear a
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quickly. Discussion: In this experiment a Grignard reagent (Figure 3) was prepared out of 4-Bromo-N‚N-dimethylaniline and reacted under reflux with magnesium‚ tetrahydrofuran‚ and an iodine crystal with magnetic
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solution of amylase made of 0.3g of amylase added to 15ml of water‚ and a 0.5% solution of amylase made of 0.75g of amylase to 15ml of water were created. A 0.25% starch solution was also created‚ and 3ml was added to each of the 4 test tubes. 1 drop of iodine was added to each test tube. 4ml of the 1% solution was added to the first test tube‚ 4ml of the 2% solution was added to the second test tube‚ 4ml of the of the 0.5% solution was added to the third test tube and 4ml of water was added to the fourth
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hyperthyroidism‚ thyroid cancer‚ and blood disorders. 6. Common isotopes that are used in nuclear imaging include: fluorine-18‚ gallium-67‚ krypton-81m‚ rubidium-82‚ nitrogen-13‚ technetium-99m‚ indium-111‚ iodine-123 (pictured above)‚ xenon-133‚ and thallium-201. For therapy‚ yttrium-90 and iodine-131 are commonly used. Many radioisotopes are made in nuclear reactors‚ some in cyclotrons. Generally neutron-rich ones need to be made in reactors‚ neutron-depleted ones are made in cyclotrons. Nuclear
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