I) INTRODUCTION * Industrial Chemistry deals with the preparation of products from raw materials through the agency of chemical change * Chemistry is important to Industry by: * Regulating manufacturing processes * Quality Control * Research and Development * Sources of raw materials from the natural environment 1) Lithosphere –Earth’s Crust 2) Hydrosphere – Marine and Oceanic Environment 3) Atmosphere – Air 4) Plants – Biosphere * Classification of Natural
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moderate pressure‚ with a fluidized powdered catalyst. In effect‚ refineries use fluid catalytic cracking to correct the imbalance between the market demand for gasoline and the excess of heavy‚ high boiling range products resulting from the distillation of crude oil. As of 2006‚ FCC units were in operation at 400 petroleum refineries worldwide and about one-third of the crude oil refined in those refineries is processed in an FCC to produce high-octane gasoline and fuel [4][5] oils. During
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H B621/02 GENERAL CERTIFICATE OF SECONDARY EDUCATION GATEWAY SCIENCE SCIENCE B UNIT 1: Modules B1 C1 P1 (Higher Tier) TUESDAY 15 JANUARY 2008 Afternoon Time: 1 hour *CUP/T45720* Candidates answer on the question paper. Additional materials (enclosed): None Calculators may be used. Additional materials: Pencil Ruler (cm/mm) INSTRUCTIONS TO CANDIDATES • • • • • • • Write your name in capital letters‚ your Centre Number and Candidate Number in the boxes above. Use blue or black ink. Pencil may
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Analysis of Hydrocarbons Leoncito‚ Alyssa Lynn‚ Libatique‚ Keith Martin P.‚ Ligot‚ Nestlhyn B.*‚ Lim‚ Jamie Therese T. Department of Psychology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Four organic samples: hexane‚ cyclohexene‚ napthalene and toulene were given to serve as reference standards to characterize and distinguish four unknown given samples. Nitration‚ bromine and basic oxidation testswere conducted to classify the different samples from being an aliphatic‚ or aromatic
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1. Introduction Plumbago zeylanica L. belonging to the family Plumbaginaceae is an important plant of medicinal value. In the Arabian Peninsula‚ it is mainly distributed over Oman‚ Yemen and the Southwestern region of Saudi Arabia. The use of the roots of P. zeylanica for treating skin problems has been recorded by early Muslim physicians. P. zeylanica is greatly valued in Ayurveda for treatment of cough‚ asthma and gastrointestinal disorders. In Sushrutha Samhitha it has been described as antiseptic
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soots and smoke were produced. C6H14 + 19/2 O2 6CO2 + 7H2O Cyclohexene Orange flame burned vigorously. A small amount of black soot and smoke were produced during the burning process. C6H10 + 17/2 O2 6CO2 + 5H2O Toluene Orange flame burned very vigorously. A large amount of black soot and smoke were produced during the burning process. C7H8 + 9O2 7CO2 + 4H2O Unknown A There was orange flame and burned mildly during the burning process. No soots
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student example of the same procedures can help during the experiment. There are many different chemicals in O.P.I‚ or Odontorium Products Inc‚ nail polish‚ but some can be more harmful than others. The basic ingredients are Formaldehyde‚ DBP‚ and Toluene. Also‚ formaldehyde is a chemical that helps harden your nails‚ but is is also harmful as it is proven to cause lung cancer. DBP or Dibutyl Phthalate‚ makes the nail polish a little more flexible and less prone to chipping. Many companies are changing
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Mini Cases in Movement Disorders Mona Dalzon Case 1 Kenny Kenny is a teenager who has experienced uncontrollable bodily and facial movements‚ various uncontrolled vocalizations‚ and other compulsions such as excessive hand washing and wringing. He has been treated with Clonidine‚ Haldol‚ pimozide and buspirone. This patient was diagnosed with Tourette’s Syndrome. Clonidine is a vasodilator that allows for blood to flow more easily to the brain. This lowers blood pressure and helps treat the tics
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Edexel IGCSE Chemistry Revision Notes IGCSE Chemistry Triple Award Revision Guide Topic Introduction to chemistry Atomic Structure Structure and Bonding – Ionic Bonding Structure and Bonding – Covalent and Metallic Bonding Organic Chemistry - Alkanes Organic Chemistry – Alkenes / Addition Polymerisation Organic Chemistry – Alcohols / Condensation Polymerisation Calculations Periodic Table Reactivity Series and Metal Extraction Electrolysis Energetics Acids‚ Bases‚ Salts and Neutralisation
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chemical reaction between functional groups of a diisocyanate and a Polyol. First developed in late 1930s‚ polyurethanes are some of the most versatile polymers. The diisocyanate can either be aliphatic‚ (hexamethylene diisocyanate) or aromatic like toluene diisocyanate. Examples of diols are ethylene glycol or even polyethylene glycols‚ with greater Mr. Synthetic polymers‚ like polyurethane‚ are produced by reacting monomers in a reaction vessel. In order to produce polyurethane‚ a step also known
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