inhibitory (antimicrobial) activity against the organism. This experiment deal with the evaluation of antimicrobial activity of two antiseptics which are 5 % iodine and 5% formaldehyde‚ against two organism Pseudomonas fluorescens (gram-negative) and Serratia marcescens (gram-negative). MATERIALS Chemical agent to be tested (5 % iodine and 5 % formaldehyde) Cultures of Pseudomonas fluorescens and Serratia marcescens. Sterile petri dishes Liquid nutrient agar Sterile filter paper disc
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volumetric flask - graduated cylinder -beakers V.Experimental procedure: Reference experiment number 7‚lab manual phar 205‚2012 p.65 . VI.Theory: Rather than titrating directly with iodine‚an excess of iodine will be generated directly in the solution with ascorbic acid according to the following equation: IO3- + 5I- +6H+ → 3I2 + 3H2O Vitamin C is readily oxidized with I2 in acidic medium.
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Running Head: GRAVES’ DISEASE Graves’ Disease Graves’ Disease Graves’ disease‚ also known as toxic diffuse goiter‚ is the most common cause (80%) of hyperthyroidism in the United States (Rakel & Bope‚ 2008). Hyperthyroidism is a hypermetabolic disorder that occurs when the thyroid gland makes more thyroid hormone than the body needs (Nettina‚ 2006). Over activity of the thyroid gland leads to high levels of thyroid
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amylopectin. To test for the presence of starch‚ the Starch Test is used. This is a simple test in which iodine is added to a given solution. If a polysaccharide such as starch is present then the iodine ion will lodge itself in the polysaccharide chain and give it a black-blue color. If iodine added to a solution turns black-blue than starch is present. If the solution remains the color of iodine‚ reddish-orange‚ there is no starch present‚ a negative test. In our experiment we scale the color we see
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Materials : Glucose‚ sucrose ‚ fructose ‚ hydrochloric acid ‚ potassium hydroxide ‚ albumin ‚ cooked starch ‚ corn oil ‚ copper (ll) sulphate solution ‚ ascorbic acid solution ‚ DCPIP solution ‚ Millon’s reagent ‚ Sudan lll ‚ tap water‚ ethanol ‚ iodine solution ‚ Benedict’s solution. Observation : Part One : Identification of Carbohydrates Reducing sugar Test Observation Fructose Colourless fructose solution turned to reddish brown solution. Glutose Colourless glucose solution turned
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fundamental resource needed for photosynthesis. 4. If the plant is kept in the presence of light‚air‚soil‚and water‚ then the plant will have a starch level of 3 because it has all of the necessary environmental conditions. Materials: safety goggles iodine solution petri dishes razor blade forceps beakers trays potting soil plastic lids 95% ethyl alcohol sodium hydroxide medicine cups Procedures: 1. Compare the plants in each tray(characteristics) 2. Label petri dishes dark‚ closed‚ normal‚ closed
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coli ) is a negative gram bacteria which stain pink colour ‚ while Staphylococcus aureus ( S.aureus ) is a positive gram bacteria which stain purple colour. Materials Bacteria : Escherichia coli ‚ Staphylococcus aureus Crystal Violet Gram’s iodine Absolute alcohol Safranin Methodology As per manual. Discussion Gram staining is a very importance preliminary step to differentiate the bacteria into gram positive and gram negative and also enable the bacteria to be examined using a light
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work. This tells me that amylase will work the best at 40°C as it might be amylase’s optimal temperature. Variables: I will change the temperature‚ at which the solution is heated. I will measure the time it takes for the colour of starch and iodine mixture to disappear. The independent variable in this experiment will be the temperature and the dependent variable time taken between the mixing of amylase and starch solutions and the end of the test. The control variables will be: Volume
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�PAGE �7� �PAGE �1� THESIS I am referring to a condition called Hashimoto ’s Thyroid Disease‚ which is a common hypothyroid disorder found among many different people and countries throughout the world. As you read through this paper‚ you will learn the basics about Hashimoto ’s Thyroid Disease‚ including some of the causes‚ the signs and symptoms‚ and the treatment. OUTLINE Hashimoto ’s Thyroid Disease I. Introduction II. Description and History a. Thyroid b. Hashimoto ’s thyroiditis III
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Practical 12: Digestion in Humans Aim: To distinguish between 5 liquids to come to a conclusion from which region of the alimentary canal it was extracted from. Hypothesis In this practical‚ we have been given 5 unknown solutions hence it is not possible for us without any logical analysis to come up with a conclusion regarding the positioning along the alimentary canal. We cannot come up with a proper answer or predict results without running through the tests. I though can base my
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