CARBON CARBON MULTIPLE BOND PRESENTED BY: WASIQUE AZHAR MSC CHEM (2 SEM) Some basic concept Electrophile : a species with a region of positive or partial positive charge electron-poor Nucleophile: a species with a region of negative or partial negative charge electron-rich TO LERN OBJECTIVE : Elecrophilic Addition to carbon-carbon double bond Stereochemistry of Elecrophilic addition reaction Hydrogenation of double and triple bond Nucleophilic Addition to carbon-carbon double
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critical currents Dag Hammarskjöld Foundation Occasional Paper Series Carbon Trading How it works and why it fails no.7 November 2009 critical currents no.7 November 2009 Carbon Trading How it works and why it fails Tamra Gilbertson and Oscar Reyes Dag Hammarskjöld Foundation Uppsala 2009 The Dag Hammarskjöld Foundation pays tribute to the memory of the second Secretary General of the UN by searching for and examining workable alternatives for a socially and economically
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How are organisms adapted for efficient gas exchange? [25 marks] Many organisms have different features which enable them to survive and carry out gas exchange effectively. Single-celled organisms‚ such as bacteria and protozoa‚ are in constant contact with their external environment. For them‚ gas exchange occurs by diffusion across their membranes. Even in simple multicellular organisms‚ such as green algae‚ their cells may be close to the environment‚ and gas exchange can occur easily. In
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Carbon Footprint Essay Criteria | Points | Score | First paragraph: What is a Carbon Footprint? | 1 | | Second paragraph: What was your Carbon Footprint? | 1 | | Third paragraph: What can YOU do to improve your Carbon Footprint and reduce your Carbon Dioxide emissions? | 1 | | Essay is neatly written with correct sentence structure‚ spelling‚ and punctuation. | 1 | | Total | | | Carbon Footprint Essay Criteria | Points | Score | First paragraph: What is a Carbon Footprint
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A REPORT ON CARBON TAX TABLE OF CONTENTS EXECUTIVE SUMMARY………………………………..…. 5-5 INTRODUCTION……………………………………….…….6-6 BACKGROUND INFORMATION…………………………...7-7 ISSUES AND PROBLEMS……………………………….…..8-8 DISSCUSSION (CRITICAL ANALYZIS)…………………...9-11 RECCOMENDATIONS……………………………………..11-12 IMPLIMENTATIONS………………………………………..12-13 REFERENCES……………………………………………......14-14 EXECUTIVE SUMMARY People have started to think about the ever
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Carbon Sink A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period. The process by which carbon sinks remove carbon dioxide (CO2) from the atmosphere is known as carbon sequestration. Public awareness of the significance of CO2 sinks has grown since passage of the Kyoto Protocol‚ which promotes their use as a form of carbon offset. The main natural sinks are: Absorption of carbon dioxide by the oceans
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Nanotubes and Nanotube membranes”. Date: 17th April‚ 2007 Guide: Ms. A. V. Patel Head of the Department: Prof. A. P. Vyas Contents • Acknowledgements • Abstract • Introduction to Carbon Nanotubes • Structure of MWNTS and SWNTs • Properties of Carbon Nanotubes • Synthesis • Applications • Nanotube Membranes • References Acknowledgements I am thankful to Ms. A. V. Patel for guiding me throughout the preparation of this seminar
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Carbon Nanofibers Carbon nanofibers can simply be known as nanostructures with bonded carbon atoms that has a molecule composed entirely of carbon in shape of hollow sphere‚ ellipsoid or tube. The layers are usually wrapped up to form carbon nanotubes. Nanotubes are usually constructed with length-to-diameter ratio of up to 132‚000‚000:1. Basically‚ carbon nanofibers can be used very commonly in future as the technology for it is really taking its shape. It can be used for sensors‚ bone growth‚
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Transport System of Organisms Problems faced by Multicellular Organisms: a)Big size-the total surface area to volume (TSA/V) is decreased . Rate of diffusion of substances into and out of all body cells is low. b)Cells are often located far away from the external surface of the body. How multicellular organism overcome these problem? a)Have specialized structure to increase the surface area for the exchange of respiration gases. b)Have transport system to get gases respiration in and
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Carbon Footprint briefly defined is the amount of CO2 left behind after any human activity. They can be classified into primary and secondary footprints. [ (McLean 2008) ] Primarily‚ it is the direct emission of CO2 from burning fossil fuels or any kind of fuels. They are considered the main and biggest source of CO2 emission‚ thus the having biggest Carbon Footprints. [ (McLean 2008) ] The CO2 emissions from all products and their life-cycles are considered as secondary footprints. The life-cycle
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