(al-kuḥl; "kohl‚ a powder used as an eye liner"). Al- is the Arabic definitive article‚ equivalent to “the” in English. The term “alcohol” was originally used for the very fine powder produced by the sublimation of the natural mineral stibnite to form antimony sulfide Sb2S3 (hence the essence or "spirit" of the substance)‚ which was used as an antiseptic‚ eyeliner‚ and cosmetic. The word’s meaning became restricted to "spirit of wine" (the chemical known today as ethanol) in the 18th century and was
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1. Where would you disconnect a chain? # a) At a bolted joint. b) At a spring clip joint. c) At an riveted joint. 2. How many strokes per minute should be used with a hacksaw? # a) 30 b) 55 c) 60 3. Unused holes in an electrical multi-pin connector should be a) fitted with pins # b) fitted with blanks c) left open 4. How many times can a locking plate be used? a) once‚ then discarded # b) indefinitely
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LEARNING LOG 2: Observe‚ Connect and Reflect on Your Learning PART III – Symmetry in Crystals The most striking examples of symmetry…are crystals. Herman Weyl Period Focus Image Question Your Observations Complete at the end of Week 5 Image 5 Uvarovite is a gemstone rich in chromium. What are your main observations about uvarovite symmetry from studying the external form? (30 - 40 words) (2 marks) What is your personal favourite gemstone and what is its space group. (up to
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For other meaning of "Economy of China"‚ see Economy of China (disambiguation). Economy of People ’s Republic of China Shanghaiviewpic1.jpg Pudong in Shanghai Rank 2nd (nominal) / 2nd (PPP) Currency Renminbi (RMB); Unit: Yuan (CNY) Fixed exchange rates USD = 6.312486 RMB (average in 2012) Fiscal year Calendar year 01 January to 31 December Trade organisations WTO‚ APEC‚ G-20 and others Statistics GDP $8.25 trillion (nominal: 2nd; 2012)[1] $12.38 trillion (PPP: 2nd; 2012)[1]
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Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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INTRODUCTION 2 FOOD & SAFETY HIGIENE reasons for being ill cos of food: poor temperature control cross contamination lack of hand washing badly maintained equipment procedures not followed incorrect storage contaminated ingredients ignorance about the dangers untrained staff prevention and control 2 key elements of achieveing standards of food safety and hygiene prevention - cleaning maintenance‚ pest control andpersonal hygiene control - good suppliers
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SYLLABUS Cambridge O Level Chemistry 5070 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents
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BIODIESEL FROM GREEN ROPE AND BROWN ALGAE: FUTURE RENEWABLE ENERGY An Investigatory Project Submitted as an Entry to the 2012 Division Science fair TABLE OF CONTENTS Page Number Title Page Table of Contents Abstract Research Plan Experimental Design Experimental Procedures Flow Chart The Problem and Its Background Introduction Statement of the Problem Significance of the Study Scope and Limitation of the Study Definition of Terms Review of
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Unit-II: MOS/BiCMOS Process Technology and Integration Introduction BiCMOS = CMOS + Bipolar (BJT) structures on the same substrate. Advantanges of CMOS device: 1. Low Power 2. High digital IC density. Advantages of Bipolar transistors: 1. Ability to deliver large drive currents 2. Capability to rapidly charge heavy loads. The implementation of digital bipolar circuits with emitter-coupled logic (ECL) gates permits small logic swings and excellent noise immunity
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CHAPTER I INTRODUCTION 1.1 HISTORY: Ethylene Glycol (1‚ 2 – ethanediol)‚ HOCH2CH2OH usually called glycol is the simplest Diol. Diethylene glycol and Triethylene glycol are Oligomers of Mono ethylene glycol. Ethylene glycol was first prepared by Wurtz in 1859; treatment of 1‚2 dibromoethane with silver acetate yielding ethylene glycol diacetate via saponification with potassium hydroxide and in
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