purposes? 1.0 Introduction and chemistry background Plastic or its scientific name polyethylene is a type of polymer. Polymers are defined as a large molecules consisting of specific small repeating monomers that combine or react together. In this case‚ plastic or polyethylene is made up of small monomers called ethylene (ethene). Ethylene molecules react and combine together through addition reaction/polymerization (double bond of ethylene breaks in the reaction) and finally form polyethylene. Basically
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Introduction In this experiment‚ glucose‚ maltose‚ lactose and sucrose are used for testing reducing and non-reducing sugars. Glucose is monosaccharide while maltose‚ lactose and sucrose are disaccharides of carbohydrates. Monosaccharaides are the monomers which make up all other carbohydrates and cannot be broken into smaller molecules by hydrolysis. Disaccharides are formed from the condensation reaction between two monosaccharaides and are linked by glycoside bond. All monosaccharaides and some
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of ethoxyethane with water. 1 (4) Give the IUPAC name of the organic compound 1 O II (CH3)2 C CH C CH3 = − − (5) Name the monomers of nylon 2 or nylon 6 ploymer. 1 (6) Give one example of an artificial sweetener used by the diabetic patients. 1 (7) Direct nitration of aniline is not carried out. Explain why? 1 (8) What type of linkage holds together the monomers of D.N.A.? 1 (9) Examine the illustration of a portion of the defective crystal given below and answer the following questions
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Business Blueprint For Quality Polymer SAP Rollout By and Project: Organization: Title: Doc Ref: Version: SAP Roll Out Quality Polymer Business Blueprint 62417566.doc Final Date of last change: 7/7/2011 This document marks the completion of the Business Blueprint phase of the SAP R/3 implementation for Quality Polymer. With this acceptance‚ the following document is confirmed and becomes the basis for the next phase (Realization) to proceed. Name Title Signature Date
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extensive oil holdings in North Africa and the Middle East‚ as well as significant coal beds in the western United States. In 1979‚ Pacific Oil established the first major contract with the Reliant Corporation for the purchase of vinyl chloride monomer. The Reliant Corporation was a major industrial manufacturer of wood and petrochemical products for the construction industry. Reliant was expanding its manufacturing operations in the production of plastic pipe and pipe fittings‚ particularly in
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vertebrates‚ and are used by the immune system to identify and neutralize foreign objects‚ such as bacteria and viruses. They are typically made of basic structural units—each with two large heavy chains and two small light chains—to form‚ for example‚ monomers with one unit‚ dimers with two units or pentamers with five units. Antibodies are produced by a kind of white blood cell called a plasma cell. There are several different types of antibody heavy chains‚ and several different kinds of antibodies‚
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Chapter I INTRODUCTION Plastics found everywhere. Bottles‚ utensils‚ food packagings are some examples of plastics that we use and see in our daily lifestyle. We can easily have plastics for our convience because it was sold in our market directly thus spending a little of our money. Behind these things our typical perception about plastic is just a bit of what plastics really are. For those people who are concious about our environment ‚ they say that plastics cause a wide environmental problem
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Supercritical Carbon Dioxide as a Green Solvent Gregory Absillis June 2009 The majority of chemical processes in chemical synthesis are carried out in solution and organic solvents usually are the first choice. To satisfy this demand‚ 15 billion kilograms of organic are produced worldwide each year. [1] These solvents often bear considerable risk due to their toxicity‚ flammability or environmental hazards. Furthermore‚ they have to be separated from the products and recycled or disposed at
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INTRODUCTION Our body produces vast amount of hormones to regulate the biochemical processes. One of the crucial hormones which act in endocrine system is the insulin. It is a small protein containing 2 chains of 51 amino acids where A chain with 21 amino acids and B chain with 30 amino acids link together by a disulphide bond. It is produced by the beta cells in pancreatic islets to maintain the blood glucose at optimum level. When there is a rise of glucose in the blood especially after meals‚
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discovered the double-helix position of the DNA. 2. What role did James Watson & Francis Crick play in our understanding of DNA’s structure? They discovered the 3D structure. 3. What type of macromolecular is DNA? Nucleic acid 4. What are the monomers of DNA? Nucleotides 5. What is the structure of a nucleotide? Draw It. A nucleotide consists of a phosphate molecule‚ a deoxyribose sugar‚ and a base (adenine‚ cytosine‚ gaunine‚ and thymine). 6. Which nucleotides are used to build DNA? Adenine
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