com Liquid Chromatography AP Chemistry Laboratory # 18 Publication No. 10535A Catalog No. AP9093 Introduction In this experiment‚ liquid chromatography is used to separate the substances that are present in grape-flavored Kool-Aid®. First‚ the dyes responsible for the purple color‚ FD&C Blue #1 and Red #40 are separated. Then‚ in a second experiment‚ the other components of Kool-Aid®‚ the flavorings and citric acid‚ are separated as well. Concepts • Resolution • Liquid chromatography • Selectivity
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Mean-Variance Analysis Mean-variance portfolio theory is based on the idea that the value of investment opportunities can be meaningfully measured in terms of mean return and variance of return. Markowitz called this approach to portfolio formation mean-variance analysis. Mean-variance analysis is based on the following assumptions: 1. All investors are risk averse; they prefer less risk to more for the same level of expected return. 2. Expected returns for all assets are known. 3. The
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Answers are hi-lighted yellow. Company A’s nationally advertised brand is Brand X. Contribution to profit with Brand X is $40 per case. Company A’s re-proportioned formula is sold under a private label Brand Y. Contribution to profit with Brand Y is $30 per case. Company A’s objective is to maximize the total contribution to profit. Three constraints limit the number of cases of Brand X and Brand Y that can be produced. Constraint 1: The available units of nutrient C (n) is 30. Constraint 2:
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Accounting for Uncertainty in Discounted Cash Flow Valuation of Upstream Oil and Gas Investments∗ by William H. Knull‚ III‚ Scott T. Jones‚ Timothy J. Tyler & Richard D. Deutsch∗∗ Valuing future income streams from the production of oil and gas is a welldeveloped discipline within the industry and among sophisticated investors. Valuations drive companies’ investment decisions and market transactions every day. In the context of resolving disputes‚ especially international ones‚ arbitral tribunals
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Liquid Chromatography – Laboratory #18 Introduction: We are using liquid chromatography to separate the colored substances in grape-flavored drinks. We separate the component dyes‚ and then we separate the flavorings and citric acids. Background: Chromatography is a process that is used to separate a substance into its component parts. The separation occurs between the stationary and moving phase of the lab. The moving phase consists of a fluid and the stationary phase consists of a solid
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Chromatography • • • Separation based on polarity of compounds Two potential phases for a compound to exist in: mobile and stationary Partitioning of compounds between mobile phase and stationary phase occurs: o Compounds that are less polar move more in the mobile phase‚ those that are more polar “stick” more on the stationary phase o These polarity differences cause compounds move at different rates and therefore can be separated 1. Mobile Phase: the phase the moves; can be gas or
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exchange Chromatography Ion exchange chromatography is a process for separating proteins and other molecules in a solution based on differences in net charge. Ion Exchange Chromatography relies on charge-charge interactions between the proteins in your sample and the charges immobilized on the resin of your choice. Ion exchange chromatography can be subdivided into cation exchange chromatography‚ in which positively charged ions bind to a negatively charged resin; and anion exchange chromatography‚ in
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Sales Force Optimization: A Self Assessment Glen S. Petersen Copyright 2011‚ All Rights Reserved Page 1 Sales Force Optimization: A Self Assessment Table of Contents Chapter 1 Introduction................................................................................................................ 3 Chapter 2 Sales Force Optimization........................................................................................... 5 Chapter 3 Trends That Impact Sales Force Performance
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13 INTRODUCTION TO QUERY OPTIMIZATION This very remarkable man Commends a most practical plan: You can do what you want If you don’t think you can’t‚ So don’t think you can’t if you can. —Charles Inge Consider a simple selection query asking for all reservations made by sailor Joe. As we saw in the previous chapter‚ there are many ways to evaluate even this simple query‚ each of which is superior in certain situations‚ and the DBMS must consider these alternatives and choose the one with
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saturation and a flow rate of 2 m3/s‚ and fresh air at -5 °C d.b.‚ 100% saturation with a flow rate of 0.5 m3/s. The mixed air is heated to 35 °C d.b. Identify each condition point and calculate the rate at which energy has to be supplied in kW. 5. Calculate the rate at which energy has to be supplied in kW when air is heated from 10 °C d.b.‚ 8 °C w.b. to 40 °C d.b. when the inlet air volume flow rate is 3 m3/s. Use the inlet specific volume to calculate the air mass flow rate. 6. A cooling
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