used as a test site for experiments involving nuclear reactors‚ high-powered lasers‚ and rockets. In the 1959 meltdown‚ "an estimated 13‚000 curies of iodine-131 and 2‚600 curies of cesium-137 escaped fro the reactor" (Rutshman). Iodine-131 is a radioactive form of iodine and is produced in nuclear reactors when uranium is split. This form of iodine is very radioactive and very dangerous. Once this chemical is entered into the body‚ the radiation damages the thyroid‚ increasing the risk of cancer
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CHEMICAL EQUILIBRIUM Reversible reactions and dynamic equilibrium Ammonia (NH3) is an important industrial chemical that is used in the manufacture of fertilisers. It is manufactured by reacting hydrogen with nitrogen. The reaction is said to be reversible and the conversion of reactants to products is never complete. N2 + 3H2 2NH3 A reversible reaction is a reaction which can take place in either direction When the concentrations of the reactants and product have become constant‚ a
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BIOLOGY LAB REPORT PRACTICAL M1 TESTING FOR MACROMOLECULES Title : Testing for Macromolecules Abstract : To test for macromolecules (carbohydrates‚ lipids‚ nucleic acids‚ and proteins)‚ iodine solution‚ alcohol‚ aceto-orcein stain and copper sulfate solution are used. The conclusions for all of the tests are positive. Introduction: A) Carbohydrate (starch) Carbohydrates are chemical compounds that contain oxygen‚ hydrogen‚ and carbon atoms. They consist of monosaccharide
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ions. The potassium manganate(VII) is an oxidising agent. Potassium manganate(VII) and sulphur dioxide Another redox colour change takes place when potassium iodide‚ which is colourless‚ is oxidised by an oxidising agent to form brown iodine solution. An example of this reaction is potassium iodide solution reacting with a solution of hydrogen
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oxygen in the water. If acid isn’t added the solution will quickly start to turn yellow due to formation of MnO2. If this happens anyway‚ add some more sulphuric acid to reverse the process. The solution should be clear with a slight green tinge. Chapter 15 – Volumetric analysis (Redox titrations) To prepare a standard solution of ammonium iron sulphate and use this solution to standardise a solution of potassium permanganate. Potassium permanganate (KMnO 4 ) is a powerful oxidizing agent and is
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The autoimmune diseases are‚ simply put‚ the process which the immune system attacks its own healthy tissues and organs. How this works is‚ our bodies have an immune system‚ which is a complex network of special cells and organs that defends the body from germs and other foreign invaders. At the core of the immune system is the ability to tell the difference between self and nonself‚ especially if there’s a flaw the body makes. When this happens‚ the body makes autoantibodies that attack normal cells
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because there was no colour change revealing the presents of proteins Part 2: Test for Starch Iodine Test for Starch Test Tube Contents Colour Change Conclusions 1 Starch suspension White (starch) and brown (iodine) > dark blue-black Therefore starch is present due to the change of colour in the solution 2 Distilled water Transparent (water) and brown (iodine) > translucent orange (diluted iodine) Therefore starch is not present due to the lack of reaction in the solution Part 3: Tests for
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depending on sugar concentration. A green precipitate means a little glucose was present. A red precipitate means glucose is present in vast amounts. Food Test 2: Test for Starch – with Iodine solution. Iodine solution is used to identify the presence of starch- a complex carbohydrate. Iodine solution (potassium iodide solution) reacts with amylase – a type of starch – whereby a blue-black polyiodide complex is formed. Method 1) Mix smalls amount of each food samples (i.e.‚ Egg lumen
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medications used for this are Tapazol and Propyl-Thyracil. Radioactive iodine is taken either as a liquid or in capsule form and is used to destroy the thyroid gland or any other thyroid cells. The duration of the treatment can be extended to 8-18 months. The surgery that is mainly used for Graves’ disease is called Thyroidectomy. This is a procedure that removes a portion or all of the thyroid gland. If you have had radioactive iodine treatment or surgery‚ you will need to take replacement thyroid hormones
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The purpose of laboratory assignment 3 was to measure the rate at which a chemical reaction takes place. For the purpose of this lab we measured the rate a balanced oxidation/reduction reaction between iodine‚ hydrogen‚ and bromate ion occurs. The above reaction occurs slowly so we used a coupled iodine clock reaction to measure the rate of the oxidation/reduction reaction because it occurs much faster but is still dependent upon the other reaction. To accomplish this‚ two mixtures were prepared in
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