Pathophysiology. Thyroid hormones assume a vital role in the normal functioning of the body. Insufficiency in secretion from their source to respond to body needs in the body risks infection of hypothyroidism. They are secreted by the thyroid glands which are located in a close-range to the trachea between the cricoid cartilage and suprasternal notch where they possess two joined lobes by an isthmus. In addition‚ the thyroid hormones are inconclusive of triodothyronine (T3) and thyroxine (T4) that
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Investigation – Storage conditions of Bleach & it’s relation with temperature. Title/Research Question: ‘How does temperature effect the concentration of chlorate ions in bleach?’ Aim: The aim of this experiment was to investigate the optimum temperature storage conditions of bleach’s stored at different temperatures. Introduction: Chlorine bleaches are made by dissolving chlorine in sodium hydroxide solution. They have a number of uses as they are used to remove colors‚ whiten or disinfectant
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Beatrice M. Period 4 22 September 2014 Material: Dark Green‚ Leafy Veggies- Spinach‚ Broccoli Light Green Veggies- Iceberg Lettuce‚ Light Green Cabbage or Brussel Sprouts Cornstarch (1 tbsp.) Iodine (5ml) Water (2000 ml) Beaker or measuring cup (500 ml) 6 Plastic jars (250 ml) 6 Stirrers Measuring spoon Pot Stove Blender Strainer 6 medicine droppers (5ml) 6 test tubes w/ rack (15 ml) A white piece of paper Pen for taking notes
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If Benedict solution is added to corn oil‚ then it will turn. If Benedict solution is added to glucose‚ then it will turn. If Benedict solution is added to gelatin‚ then it will turn. If Benedict solution is added to butter‚ then it will turn. If iodine is added to starch‚ then it will turn. If Benedict color is added to apple juice‚ then it will turn. If any organic substance is tested with distilled water‚ then nothing will happen. Materials: -12 test tubes -Test
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then in the presence of Iodine‚ their colors if the test sample contains sugars‚ then the iodine will change from yellow-brown to blue-black. 4. If the test samples show the presence of lipids‚ the when the substance is placed onto a brown paper bag and sits for 10 minutes‚ then a translucent or opaque spot will appear. Materials: * 8 test tubes * test tube rack * test tube holder * glass stirring rod * sharpie marker * how water bath * iodine solution * brown
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12.097 Environmental Chemistry of Boston Harbor – IAP 2006 Lab 1: DETERMINATION OF DISSOLVED OXYGEN BY WINKLER TITRATION 1. Background Knowledge of the dissolved oxygen (O2) concentration in seawater is often necessary in environmental and marine science. It may be used by physical oceanographers to study water masses in the ocean. It provides the marine biologist with a means of measuring primary production - particularly in laboratory cultures. For the marine chemist‚ it provides a measure of
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Ammonium sulphate (NH4)2SO4. FW = 132.14‚ Eq. = 66g/l. 250ml 0.05M = 1.325g = 0.1N | Adipic acid HO2C(CH2)4CO2H‚ FW = 146.4‚ Eq. = 73.03g/l 250ml 0.05M = 1.83g = 0.1N | Barium hydroxide Ba(OH)2.8H2O‚ FW = 315.48‚ Eq. = 157.5g/l 250ml 0.05M = 3.94g = 0.1N | Benzoic acid C6H5COOH‚ FW = 122.12‚ Eq. = 61g/l 250ml 0.05M = 1.52g = 0.1N | Calcium carbonate CaCO3‚ FW = 100.00‚ Eq. = 50g/l 250ml 0.05M = 1.25g = 0.1N | Furroic acid FW = 112.08‚ Eq. = 112g/l 250ml 0.1M = 2.8g = 0.1N |
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Phenolphthalein indicator Ammonia solution (1 M NH3) Iodine crystals (I2) Graduated cylinder Procedure: Part 1 Diffusivity 1. Place a small amount of iodine in a beaker. Cover the beaker with a watch glass. Place a wet tissue paper on top of the watch glass. Then put it inside of the fume wood. 2. Heat the beaker inside the fume wood. 3. Observe the changes in the iodine. Compare this with the original iodine. Part 2 Solubility 1. Fill the test tube with
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Objective: To find out the food substance in food sample X‚Y and Z. Biological Principle: Test for lipids using the grease spot test Test for glucose using Clinistix paper Test for reducing sugars using Benedict’s test Test for starch using the iodine test Test for proteins using Albustix paper Test for vitamin C using DCPIP solution A control using distilled water instead of the sample should be included. Independent: different types of food samples Dependent: different types of food substance
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two have‚ group two has 2 valence electrons. When group two elements become ions what is their charge‚ their charge is +2. What are the group 17 elements called‚ they are called the Halogens. List the group 17 elements‚ Fluorine‚ Chlorine‚ Bromine‚ Iodine‚ and Astatine. How many valence
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