Introduction: Recrystallization is used for the purification of solid compounds. The recrystallization process relies on the fact that majority of compounds are more soluble in hot solvent than in cold. The hot saturated solution containing the compound will have unwanted impurities and will be filtered out and cooled to produce the pure crystal constituents of the compound. Thin layer chromatography can be used as a physical method to segregate compounds from natural sources. E.g. Spinach
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1) Natural buffers are chemicals that the body releases into the blood stream to help maintain a healthy pH level. Carbon dioxide (CO2) acts as an acid by donating hydrogen ions when needed and forms carbonic acid when it dissolves in water. Carbonic acid bicarbonate is important for maintaining an acid base balance in the blood as it equalizes the pH (7.5) of the blood. All body fluids have buffers that defend the body against pH changes. A process that affects buffers in the blood is exercise
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business‚ but he is debating whether to start a S corporation or a C corporation due to potential environmental factors associated with his business. He wants to maintain a limited liability and wants to avoid double taxation by paying himself a salary equal to his companies before tax earnings. He also would like to issue preferred stock to his son in the future to keep his interests in the business. He was advised by his friend to choose a C Corporation to maintain maximum flexibility in the business
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Chemical Engineering Career Adam Homan Saint Paul College Chemical Engineering Career For my career path I have chosen to become a chemical engineer. A chemical engineer is considered in my opinion to be a universal engineer‚ exploring all facets of life. The responsibilities of a chemical engineer can vary but first start with a problem that leads to an idea and then a hypothesis. Following those first steps includes a lot of research involving many check points along the way to ensure
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Case 4: Progressive Corporation 1. How has Progressive’s strategy evolved over time? Is it sustainable? Answer: Progressive began in 1937 by Joseph Lewis and Jack Green‚ and over the years‚ it became the number three player in the US private passenger auto insurance industry through competitive pricing and by continuously improving our products and services. Progressive’s customer value proposition was “Fast‚ Fair Better”. The Progressive was constantly looking for ways to provide insurance to
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The Sequence of Chemical Reactions Drew Selfridge Dave Allen‚ Lab partner Instructor Yang February 11‚ 1997 INTRODUCTION This experiment was to recover the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form‚ but the reactions will turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process‚ however‚ some of the Cu+2 ions may be lost. The copper will subjected
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Target Corporation’s CEO Discusses Q4 2013 Results - Earnings Call Transcript Feb. 26‚ 2014 2:30 PM ET | About: TGT Operator Ladies and gentlemen‚ thank you for standing by. Welcome to the Target Corporation’s Fourth Quarter Earnings Release Conference Call. During the presentation‚ all participants will be in a listen-only mode. (Operator Instructions) As a reminder‚ this conference is being recorded Wednesday‚ February 26‚ 2014. I would now like to turn the conference over to Mr. Gregg Steinhafel
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BUFFER SOLUTIONS CONTENTS 1. Introductions. 2. Principles of buffering. 3. Applications a. Simple buffering agents. b. "Universal" buffer mixtures. c. Common buffer compounds used in biology. 4. Buffer capacity. 5. Calculating buffer pH a. Monoprotic acids. b. Polyprotic acids. 6. Biblography. INTRODUCTION A buffer is an aqueous
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MW Petroleum Corporation (A) 1. Structure and execute a DCF valuation of all the MW reserves using APV. How much are the reserves worth? Is your estimate more likely to be biased high or low? What are the sources of bias? Answer: The DCF valuation of all the MW reserves using APV indicates that the net worth of the portfolio is around $516.30 million. The estimate is more likely to be biased on the higher side. REVENUES: The data for the projections was collected by Morgan
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Around the world‚ forests are being logged for timber and paper pulp and cleared to grow mono-crops like palm oil and soy while they are deteriorating from the impacts of global warming. Deforestation is a major driver of global warming‚ responsible for up to 20 percent of global greenhouse gas emissions–more than all the cars‚ trucks‚ planes‚ boats and trains in the world combined. Deforestation doesn’t just threaten our climate‚ it threatens the livelihoods of 1.6 billion people that rely
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