whole. Paul Roberts exclaims‚ “...Whereas some areas might find it fairly easy to eat locally… people in other parts of the country and the world need to look farther afield” (Source F). Roberts also goes on to affirm‚ “... in the United States‚ 80 percent of us live in large‚ densely populated urban areas… typically hundreds of miles‚ often thousands of miles‚ from the major sources of production” (Source F). Modern society has moved away from rural areas to urban cities far from the production of
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5.4. Synthesis of Poly L-Lactide (PLA) PLA was synthesized by the ring opening polymerization of L-Lactide in presence of stannous octoate. L-Lactide (1.44 g (0.01 mol)) was dissolved in 20 mL of toluene; 1.5 mg of stannous octoate was added to this solution. The
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ethlenediamine (NH2CH2CH2NH2) that formed [Co(en)2(H2O)2]Cl. Then the [Co(en)2(H2O)2]Cl was reacted with H2O2 to change the cobalt’s charge to cobalt(III) from cobalt(II). Finally HCl was added into the solution to form [Co(en)2Cl2]Cl. The percent yield was 45.51%.To synthesis trans isomers of [Co(en)2Cl2]Cl‚ distilled water was first mixed with CoCl2▪6H2O‚ the solution color was changed to wine color. After ethlenediamine (NH2CH2CH2NH2) was added‚ the color of the solution changed to blood color‚ and kept
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Locavores is an interesting issue in which many topics need to be reviewed. A Locavore is someone who has decided to eat locally grown or produced products as much as possible. These people have made a smart decision in the fact that it is true that whatever produce is grown locally is most likely healthier‚ and they are supporting their fellow townspeople. Locavores from cities however face the challenge of trying to find a local producer to buy from. Locavores is a large movement‚ that although
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KAl(SO4)2●12H2O(s) + 3 H2(g) Its composition was analyzed using two precipitation tests and two flame tests. Three methods for growing crystals were then set up for observation next lab. Theoretical yield and percent yield: The theoretical yield for alum was 4.55g and the percent yield was 139%. The percent yield was above 100% because the alum was saturated with ethanol and water. KOH test: The KOH test identified the presence of aluminum in alum. When KOH was added to an aqueous
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in a few decades? Then the dime? The quarter? Introducing such a system of currency would prove far too strenuous to Kolbe regardless‚ given the fact that fifty-nine percent of Americans aged eighteen and over oppose abolishing the penny‚ compared to twenty-three Americans favoring the abolition of the penny with eighteen percent of citizens having no official opinion (Source E). The time and money spent to conduct polls and attempt to persuade two-thirds of the American population to forfeit their
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Spectrophotometer to Measure the Concentration of an Unknown Solution Introduction Concentration is the ratio of the quantity of solute to the quantity of the solvent or the quantity of solution. By knowing this‚ CO(NO3)2 *6H2O Purpose What is the percent transmittance of six different solutions of cobalt (II) nitrate hexahydrate using a spectrophotometer? Materials * Graduated cylinder (10 mL) * Graduated cylinder (25 mL) * pipet * 1 cuvette * Safety goggles * Electronic balance
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Main factors affect the refined oil yield: 1‚ the alkali refining loss (1) for removal of colloid in hair oil‚ free fatty acid‚ moisture‚ impurities and other form of loss; (2) in the process caused by the loss of neutral oil saponification‚ emulsification; (3) theoretical calculation formula: alkali refining losses = 0.2 + 1.25 x (FFA % % + water + phosphatide content % % + 0.3% + impurities) 2‚ decoloring loss mainly for adsorption bleaching waste clay in oil absorption caused by the loss
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Chapter 14 Bond Prices and Yields Multiple Choice Questions 1. The current yield on a bond is equal to ________. A. annual interest divided by the current market price B. the yield to maturity C. annual interest divided by the par value D. the internal rate of return E. none of the above A is current yield and is quoted as such in the financial press. Difficulty: Easy 2. If a 7% coupon bond is trading for $975.00‚ it has a current yield of ____________ percent. A. 7.00 B. 6.53 C. 7.24
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As shown in the balanced chemical reaction in figure 1‚ Felbinac is synthesized from 4-bromophenyl acetic acid‚ phenylboronic acid‚ and 10% Pd/C. Figure 1: The balanced chemical reaction showing the synthesis of felbinac. It functions by inhibiting cyclooxygenase-1‚ which releases prostaglandins that cause pain as a response to injury. In a study conducted by Moore et al.‚ 160 patients were subject to various topical NSAIDS to determine their effectiveness
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