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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Sept 27‚ 2010 Chapter 4 * With four valence electrons‚ carbon can form four covalent bonds with a variety of atoms * This tetra valence makes large‚ complex molecules possible * Fundamental groups: Alkanes and Alkenes * The electron configuration of carbon gives it covalent compatibility with many different elements * The valences of carbon and its most frequent partners (hydrogen‚ oxygen‚ and nitrogen) are the “building code” that governs the architecture of living
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Answer the following in at least 100 words: 1. Describe the structure of DNA. ➢ DNA is a nucleic acid‚ which consist of long chains (polymers) of chemical units (monomers) called nucleotide. A molecule of DNA contains two polynucleotides‚ each a chain of nucleotides. Each nucleotide consists of a nitrogenous base‚ a sugar‚ and a phosphate group. Each DNA strand serves as a mold‚ or template‚ to guide reproduction of the other strand. There are four different types of nucleotides found in DNA
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Many girls all over the world wear nail polishes to make their nails look pretty and shiny. Nail art is a lot of time consuming activity because it is hard for the polish to be applied on the nail evenly‚ also it takes a lot of time to dry. While the nail polish is drying‚ girls cannot do anything but just wait or do something and get their nails ruined. It is also extremely hard to keep them in perfect condition. After two to three days from applying‚ the polish starts to get chipped. However‚ after
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pH can range from 1-14‚ 7 being neutral‚ 7-1 being more and more acidic towards 1‚ and 8-14 being more and more basic towards 14. The product that was measuring to determine the enzyme’s performance was glucose‚ a monomer or small molecule‚ of the polymers‚ consisting of bound monomers‚ lactose and maltose. We hypothesized that lower temperatures would cause the enzyme to slow down and at higher temperatures it would unravel or go through
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Hydrolysis Report Bile Esculin Hydrolysis‚ Starch Hydrolysis‚ UreaHydrolysis‚ Casein Hydrolysis Hydrolysis Report Introduction Hydrolysis is a chemical reaction that uses water to split complex molecules. The water molecule H2O is split in the mechanism of hydrolysis‚ hydrogen cations and hydroxide anions. When the enzyme catalyzes its reaction inside the cell‚ it is referred to as intracellular hydrolases. When the enzymes secreted from the organism to catalyze reactions outside the cell‚ it
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carbon12 – 6 protons and 8 neutrons Covalent bond: sharing (3‚4‚5 rows) Ionic bond: stealing (closest to 8 or 0) ORGANIC CHEMISTRY Organic molecule: carbon and hydrogen 4 types of organic macromolecules: carbohydrate‚ lipid‚ protein‚ nucleic acid Monomer: one piece Polymer: many pieces Hydrolysis- (H20 is needed) catabolic- to break * Dehydration synthesis/polymerization-(makes longer polymer) Anabolic: to build * CAPT enzyme
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POLYSTYRENE Project Report By Pramod. M. Munjgude (PG/M/090021) Guided By Prof. Mrs. Sucheta. B. Avasthi Packaging technology [pic] INDIAN INSTITUTE OF PACKAGING ANDHERI (E)‚ MUMBAI September 2009 ACKNOWLEDGEMENT I express my sincere gratitude to my guide Prof. Mrs. Sucheta B‚ Indian Institute of Packaging‚ Mumbai for her valuable guidance and support for the completion of this report. I am thankful to Indian institute of Packaging
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