ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
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A General Review of Tetracyclines Antibiotics Chang Liu Instructor: Prof. Jasson Sello Department of Chemistry‚ Brown University Providence 02906‚ RI Tetracyclines are the first broad-spectrum antibiotic to be applied to clinic use. Nevertheless‚ the increasing incidence of bacterial resistance of tetracyclines led to a series of studies on the development of semisynthetic tetracyclines to circumvent the resistant organisms. In order to better design the structures of tetracycline derivatives
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1.) Explain why the following substances are added to soil by gardeners and farmers. a.) Lime CaO It increases the pH of soil.Soil that is too acidic presents two different problems for crops. First‚ the amount of necessary minerals in the soil such as potassium and calcium decreases. Second‚ aluminum and manganese levels increase to potentially toxic levels below a pH of roughly 5.5.Calcium oxide‚ addresses the problem. It reacts in water to release calcium ions and hydroxide ions‚ which raise
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1.1 Explain the sequence and rate of each aspect of development from birth to 19 years All infants‚ children and young people follow a basic pattern in development. The rate they develop will vary from child to child. This is because all children are individuals‚ however knowing what to expect and roughly what age to expect it (milestones) can help us recognize development issues (early recognition is essential). Development is broken down into five section although they are separate‚ they all interconnect
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Barsade is the co-author of a new paper titled‚ “Why Does Affect Matter in Organizations?” The answer: Employees’ moods‚ emotions‚ and overall dispositions have an impact on job performance‚ decision making‚ creativity‚ turnover‚ teamwork‚ and leadership. In the paper‚ Barsade consider three different types of feelings: Discrete‚ short-lived emotions‚ such as joy‚ anger‚ fear and disgust. Moods‚ which are longer-lasting feelings and not necessarily tied to a particular cause. A person is in
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Why organisations need to change and how change affects organisations: In today’s fast evolving world that is always looking out for changing so frequently‚ if any organization is there which thinks to get this pace slow would be profoundly disappointed. In fact organizations should embrace change to their system‚ as without change there might be some chances that businesses lose the competitive edge in the market and they would fail meeting the customer’s expectations who are the loyal customers
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Hydrochloric acid ---- Calcium Chloride + water + carbon dioxide. CaCO3 + 2HCl ---- CaCl +H2O + CO2 Measurements and Variables: The variables I have chosen to change is strength of the hydrochloric acid which will be 1 mole‚ 0.7 mole‚ 0.5 mole‚ 0.3 mole and 0.1 mole some variable I will not be using are temperature‚ mass‚ density. The measurements I will be using are time (s) and volume in (cm3). Fair Test: To make sure this a fair test I will get exact amounts of the Hydrochloric acid and Calcium
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United States government have assumed control of General Motors? If you were to read a story in the news that a government had assumed control of a private company‚ what country might come to your mind? Possibly Russia‚ Cuba‚ China‚ maybe even Vietnam? Probably the United States would be the furthest from your mind. Not everything the United States government does should be considered socialistic‚ but obtaining control of the private company General Motors was an act of socialistic behavior. As
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mathematics a little more than what they do. You might think‚ math is only a bunch of numbers‚ but what if I tell you it is all around you? For example in a tree? In a flower? At the beginning of the experiment the hypothesis was to look for patterns in nature focusing in the Fibonacci sequence as a main and looking for angles. What was first done was to count a pine cone’s pieces‚ a flower’s petals‚ a celery‚ and grapes to find the Fibbonacci sequence which not found only on the celey and on the flower
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Dollar General Case Study [Author Name(s)‚ First M. Last‚ Omit Titles and Degrees] [Institutional Affiliation(s)] Dollar General Case Study 1. Explain why the old‚ nonintegrated functional system created problems for the company. Be specific. The rapid growth of the Dollar General places strain on its existing IT systems. Because the old non-integrated functional system was not scalable‚ there was a negative impact on meeting the working demand. There were two major problems created. The
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