Purpose: To synthesize 1‚2‚3‚4-tetraphenylnaphthalene through a two-step synthesis. The aldol condensation reaction between benzil and dibenzyl ketone forms 2‚3‚4‚5-tetraphenylcyclopentadienone‚ which then reacts with a benzene formed by anthranilic acid and isoamyl nitrate in order to yield 1‚2‚3‚4-tetraphenylnaphthalene. Reaction Equation A: Synthesis of 2‚3‚4‚5-tetraphenylcyclopentadienone: A solution of 4 capsules potassium hydroxide (0.5g) and 5mL anhydrous ethanol was prepared
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Sarah Khan Bivins-5th April 20th‚ 2013 Protein Synthesis Every day‚ you take in an abundance of different biomolecules; one of them being proteins. Have you ever wondered how proteins are made? They don’t just grow from a tree or fall from the sky‚ they are made through a process called protein synthesis. Protein synthesis is broken up in two two steps: transcription and translation. Transcription starts inside the nucleus when the DNA is unzipped by helicase. Following that‚ the mRNA nucleotides
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in. Suppose a project has conventional cash flows and a positive NPV. What do you know about its payback? Its profitability index. Its IRR? If a project has a positive NPV it means it will cover the initial investment so there will be an eventual payback period and some type of IRR. Concerning payback: a) Describe how the payback period is calculated and describe the information this measure provides about a sequence of cash flows. What is the payback criterion decision rule? The payback period
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or familiar. It should have some sophistication and nuance. The best and only way to craft such a thesis is to spend a lot of time reading and rereading the essays you choose to work with‚ reflecting on them‚ talking about them with others‚ and thinking about what they have to say about (your) life. Read slowly and carefully‚ paying close attention to little things that may open interesting doors. Go toward something in the readings that has some pull or resonance for you—something perplexing‚ bothersome
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Synthesis of Aspirin Name: Xuanyi Li Teaching assistant: Deirdre Zwilling November 15‚ 2009 Purpose: To synthesize aspirin‚ a common analgesic drug‚ via nucleophilic acid-catalyzed substitution reaction of salicyclic acid with acetic anhydride. The whole reaction is catalyzed by phosphoric acid. (The experiment involved three parts: The synthesis of aspirin‚ the isolation and purification of aspirin‚ and the estimation of the purity of the final product.) [pic] Procedure[1]: A mixture
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Final Exam 1. In “Homo Loquens‚” Marshall Poe describes his theories on speech communication. Within his ideas‚ he points out disadvantages in speech‚ and how society tends to interpret it. One disadvantage that Poe pointed out was the idea of privacy‚ and how with speech‚ nothing can ever be private. “You have to be pretty good with masks‚ makeup‚ or false mustaches to fool anyone looking right at you‚ and most of us aren’t” (Poe 39). This quote is interesting because the masks‚ and the makeup
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Jeana Greaves Chem3301-112 June 19‚ 2013 Synthesis of Aspirin from Methyl Salicylate Introduction The synthesis of Aspirin (Acetyl Salicyclic Acid) began with methyl salicylate and sodium hydroxide as the reagent. The polar oxygen accepts the electrons from now positively charged hydrogen. The positively charged sodium disassociates leaving the hydroxide ion with a negative Scheme 1 shows the mechanisms that were demonstrated during the synthesis of Aspirin. charge that attracts to the positively
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for loitering (LOIT) is the dependent variable. The independent variable is a dummy variable coded 1 for days when classical music is played on the outdoor speaker system‚ and 0 for days when music is not played (MUSIC). What can Ms. Waldo conclude about the effectiveness of this program from the regression results? Q3. Organizational theorist Ken Brier has obtained data on the composition of nonprofit boards of directors in the metro Chicago area. Professor Brier hypothesizes that the higher the
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U‚ and C for the nucleotides guanine‚ adenine‚ uracil and cytosine) that directs synthesis of specific proteins‚ while many viruses encode their genetic information using an RNA genome. Some RNA molecules play an active role within cells by catalyzing biological reactions‚ controlling gene expression‚ or sensing and communicating responses to cellular signals. One of these active processes is protein synthesis‚ a universal function whereby mRNA molecules direct the assembly of proteins on ribosomes
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The first synthetic sweetener‚ saccharin‚ was discovered five years prior to Dulcin. The discovery of Dulcin occurred in 1883. Approximately seven years after it’s discovery‚ J.D. Reidel‚ of Berlin‚ was able to synthesis Dulcin at a reasonable cost. Once it became possible to synthesis at a reasonable cost‚ mass production of the sweetener began. Dulcin was favored over its competitor‚ Saccharin‚ because it did not possess a bitter aftertaste. For a very brief period of time Dulcin was marketed
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