Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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PROCEDURE RESULTS DISCUSSION IR ANALYSIS 8 Objectives to differentiate various types of oxygen-bearing organic compounds to device a scheme to distinguish each functional group Analysis of Oxygen-bearing Organic Compounds alanx3@yahoo.com OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS to characterize an unknown sample through parallel chemical tests ARMSALCEDO ARMSALCEDO alanx3@yahoo.com EXPERIMENT EXPERIMENT 8 OBJECTIVES CONCEPTS REAGENTS PROCEDURE
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Identification of a Copper Compound by Percent Mass Unknown Compound: #9 Abstract: The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this‚ the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular
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11A was to test for the presence or absence of a particular set of functional groups through the use of wet chemical tests. In this manner‚ Unknown A which was a colorless solution‚ was first tested with 2‚4-DNP which after mixing for a few seconds formed a bright yellow precipitate. Although this confirms the presence of either a ketone or aldehyde group‚ one simple chemical test does not completely specify the presence or absence of other functional groups. Therefore‚ a second test was made in
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Study of Gold metal Date: 14/01/2013 Submitted to: Dr Sami Habib Submitted by: Jamil Mahfoud (A1010659) I- General introduction about metals: a- Historical background Back to 6000 BC‚ process metallurgy is known as one of the oldest applied sciences. Despite that the form of metals was very basic but it has a big impact on the society because of its wide uses especially as tools for agriculture or hunting and even as artistic styles later on. There are 86 known metals so far that were
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The Fear of The Unknown The short stories of Ben Loory‚ Stories for Nighttime and Some for the Day‚ exhibit numerous postmodern qualities through literary context‚ language and themes. One of these reoccurring themes within the collection is the concept of fear of the unknown. Three stories exemplary of this theme are “The Magic Pig‚” “The Fish in the Teapot‚” and “The Snake in the Throat.” In every one of these stories chosen there is an appearance of an object. One character is tortured by the
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STRENGTHENING OF METALS There are 4 major ways to strengthen metals‚ and all work because they make dislocation motion more difficult. They also reduce the ductility: 1) Cold work (Strain Hardening) 2) Reduce grain size (Strengthening by Grain Size Reduction) 3) Add other elements in solid solution (Solid Solution Strengthening) 4) Add second phase particles (Precipitation or Age Hardening) • These mechanisms may be combined. • For example‚ the world’s strongest structural material (with
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Themes of W.H. Auden’s "The Unknown Citizen" Conformity and Anonymity in the Modern World "Social Security Number? Birth date? Nine digit telephone number starting with area code? Mother’s Maiden Name?" In many ways‚ we are simply faceless numbers to modern society‚ not individuals with feelings and emotions and dreams. W.H. Auden‚ a well-known English poet and dramatist‚ discusses this important theme in his poem "An Unknown Soldier." Auden‚ being a modernist‚ is concerned with this modern idea
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Scrap Metal To Inform To inform my audience that scrap is a commodity often confused with waste. Scrap has monetary value making up one of the largest exports of the United States. Introduction I. Scrap is a $65 billion dollar industry in the United States. The U.S exports $15.7 billion to other countries. II. While this is a global industry it all starts with local entrepreneurs like me. III. Scrap is everything that we throw away that can be recycled and used to make new products.
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The Unknown Citizen : W.H. Auden - Summary and Critical Analysis | The Unknown Citizen by W.H. Auden is a satiric poem. It describes an average citizen in a government-controlled state. In many big cities‚ there is a monument to the Unknown Soldier that stands for the thousands of unknown soldiers who die for their country. The title of Auden’s poem parodies this. | | The citizen to whom the monument has been built has been found to be without any fault. He was a saint not because he searched
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