Chapter 1 Introduction 1. Introduction 1.1EXHAUST SILENCERS Engine exhaust noise is controlled through the use of silencers and mufflers. Generally speaking‚ there is no technical distinction between a silencer and muffler and the terms are frequently used interchangeably. A silencer has been the traditional name for noise attenuation devices‚ while a muffler is smaller‚ mass-produced device designed to reduce engine exhaust noise. 1.2 SILENCER SELECTION FACTORS The use of an exhaust silencer is
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Experiment 3: The preparation of acetaminophen (paracetamol) with thin layer chromatography (TLC) to monitor the reaction. Abstract: This experiment is to demonstrate the preparation of paracetamol and its properties. Reflux and filtration of 4-aminophenol and acetic anhydride formed the crude sample. Further analysis of dry white crystals were used to give quantitative measurements and a percentage yield of 46% was obtained. The overall conclusion is that the acetic anhydride reacted with the
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the main contributors to an estimated 4 billion cases of diarrhoeal disease annually‚ causing more than 1.5 million deaths‚ mostly among children under 5 years of age (WHO 2005). Because diarrhoeal diseases inhibit normal ingestion of foods and adsorption of nutrients‚ continued high morbidity also contributes to malnutrition‚ a separate cause of significant mortality; it also leads to impaired physical growth and cognitive function‚ reduced resistance to infection‚ and potentially long-term gastrointestinal
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Investigation of carbonation profiles of a 60 years old carbonated concrete specimens subjected to re-alkalization M.O. Mohsen1‚* 1 College of Engineering‚ Qatar University‚ P.O. Box 2713‚ Doha‚ Qatar Re-alkalization method is an electrochemical treatment which is commonly used to repair carbonated concrete elements. This method prevents further reinforcement corrosion by increasing the PH of the element which results in maintaining the reinforcement passivation. In this paper‚ the re-alkalization
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By Azrul Bin Alias Progress report submitted in partial fulfillment of the requirements for the Bachelor of Engineering (Hons) (Chemical Engineering) JULY 2009 Universiti Teknologi PETRONAS Bandar Seri Iskandar 31750 Tronoh Perak Darul Ridzuan ABSTRACT The objective of this project is to optimize the preparation of modified Calcium Oxide (CaO) to capture CO2 by carbonation through hydration of ethanol/water. The carbonation reaction is the basis for CO2 capture systems
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Latest Invention: Tea Bag that Uses Nanotechnology to Clean Drinking Water One of the latest inventions developed by researchers from Stellenbosch University in South Africa is a one of a kind "tea bag" that makes use of nanotechnology to clean drinking water‚ making it free from contaminants and bacteria. It would be interesting to note that the "tea bag" is made of the same material that is used to make the actual tea bags. The only difference is that in the Stellenbosch researchers’ invention
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Photocatalytic degradation of methylene blue using TiO2 nanoparticles Nupur Mittal Chemical Engineering‚ IIT (BHU) Varanasi. Abstract: The aim of this research is to reduce the pollution caused by methylene blue dye in waste water coming from textile industries. For this purpose‚ TiO2 nanoparticles are made as they show good photocatalytic activity in degradation of dyes into harmless products. Synthesis is done using titanium butoxide and 2-propanol. The particles formed were a little larger
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Are you using manual hexadimethrine bromide (polybrene) test in blood cross matching? Watch out! Abstract: BACKGROUND: Blood cross matching test mainly includes manual hexadimethrine bromide (polybrene) test (MPT) and the automatic analyzer method (by coombs card) at the Department of blood transfusion. Generally instrumental method is used for large quantities of samples. It can save manpower; MPT is used for emergency and few samples. it can save time. Our department recently encountered a case
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Energy Systems and Sustainability www.ucl.ac.uk Future developments in polymer electrolyte fuel cells for vehicle applications Kassim Jama* Afiq Latip Erwan Firdaus Kranthi K. Kumpatla Mohamud Mohamed 5 Department of Chemical and Process Engineering‚ University College London Torrington Place‚ London WC1E 7JE‚ United Kingdom 10 Abstract The study of fuel cell systems promise to be a very important topic in the present day as we prepare ourselves in the energy challenges that
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Nano-Bio-Sensing Sandro Carrara Editor Nano-Bio-Sensing Foreword by Giovanni De Micheli Editor Sandro Carrara EPFL Lausanne Switzerland sandro.cararra@epfl.ch ISBN 978-1-4419-6168-6 e-ISBN 978-1-4419-6169-3 DOI 10.1007/978-1-4419-6169-3 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2010938597 # Springer Science+Business Media‚ LLC 2011 All rights reserved. This work may not be translated or copied in whole or in part without the written permission
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