from the nitrogen in the air. Selective catalytic reduction (diesel exhaust fluid) is used to reduce the amount of NOx released into the atmosphere. Diesel exhaust fluid (from a separate DEF tank) is injected into the exhaust pipeline‚ the aqueous urea vaporizes and decomposes to form ammonia and carbon dioxide. Within the SCR catalyst‚ the NOx are catalytically reduced by the ammonia (NH3) into water and nitrogen (N2)‚ which are both harmless; and
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different gases. In 1811‚ Amedeo Avogadro realized that the assumptions that gases remain of single atoms to be wrong and that gases actually remain of multiple atoms‚ molecules. The next discovery was the synthesis of urea in the 19th century when Friedrich Woehler synthesized urea from inorganic materials‚ proving that substances made by living things can be reproduced with nonliving substances. The periodic table of elements is next discovery and is discovered by Dmitry Mendeleyev‚ who made cards
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grouped with the enterobacteriacea and is an opportunistic pathogen of humans. In humans P.vulgaris is known to cause urinary tract infections and wound infections. P.vulgaris is associated with nosocomial infection‚ and has the ability to degrade urea to ammonia by production of the enzyme urease. McConkey agar contains lactose‚ which P.vulgaris does not ferment. It ferments glucose‚ sucrose‚ galactose‚ glycerol occasionally maltose with gas production‚ but never lactose. P.vulgaris
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| Gram Negative Unknown | Biology 3444-006 | | Lena Wallace | 11/7/2011 | | Abstract: The purpose of this lab was to identify an unknown bacteria culture using differential tests. The identification of the unknown culture was accomplished by identifying the bacteria based on its specific metabolic characteristics and morphology. It is suggested that culture 11 is a sample of Enterobacter aerogenes. Introduction: This experiment was centered on metabolic and biochemical testing
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Activity 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. * The size of the pores of the membrane * The size of the molecule diffusing through the membrane 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? * Because the pores of the membrane were not large enough * I predicted this correctly. 3. Describe the results of the attempts
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Ca2+ can form precipitation with oxalate in form CaC2O4. H2O in basic solution. So‚ in this method we will slowly precipitate all Ca2+ in the solution with C2O42- in acidic HCl solution and slowly raise pH of the solution by thermal decomposition of Urea. Then‚ we will filter and dry the precipitation from the solution and mass the precipitation. After all we will calculate to figure out how much Ca in the precipitation‚ then compare with the expected Ca amount. b) Procedure: The experiment is done
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1 © This is a licensed product of Ken Research and should not be copied TABLE OF CONTENTS 1. Asia Fertilizer Market Introduction 2. Asia Fertilizer Market Size and Introduction by Volume‚ 2006-2012 3. Asia Fertilizer Market Segmentation‚ 2006-2012 3.1. 3.2. 4. By Countries‚ 2006-2012 By Nutrients‚ 2006-2012 China Fertilizer Market 4.1. China Fertilizer Market Size and Introduction‚ 2006-2012 4.2. China Fertilizer Market Segmentation by Nutrients‚ 2006-2012
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the molecule because the larger the molecule the slower the rate diffusion. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? The urea was not diffused in the 20 MWCO because the poles of the membrane are smaller than the urea’s molecules. This agreed with my predictions because after all the urea wasn’t able to diffuse in the 20 MWCO substance. 3. Describe the results of the attempts to diffuse glucose
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bubbles that is positive. In oxidase test‚ we get positive result that presents purple color. Also‚ we get negative on Tryptophan test because there is no red ring at the top of the tube. Then‚ we get negative result both Urea and TSI test because there is no pink color for Urea test and no black color on the bottom of the tube in TSI test. Then‚ follow three tests results are all positive. That is deep blue color for citrate test‚ clear zone surrounding growth for skim milk agar
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Analysis: Which sample do you suspect has diabetes mellitus? Provide your reasons. Diabetes mellitus is a condition created by the inadequate secretion of insulin from the pancreas. Insulin is a hormone that allows your body to use carbohydrates or store them for future use. Inadequate amounts of insulin causes a condition called hyperglycemia‚ which is an excessive amount of glucose in the blood stream. When the blood is filtered through the kidney‚ a large of amount of glucose is retained in the
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