Chemistry 100 Experiment #2: Chromatography of Food Dyes Name: Cassandra DeVaux Date: April 17‚ 2014 Purpose: To learn how mixtures of compounds can be separated and what food dyes are found in certain foods Introduction: In this exercise we will separate food dyes from a variety of sources. We will first gather data on known dyes where we know how many substances make up the dye. Then we will collect data on some samples where we do not know the make-up. We will compare our
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concentration of stock solution the class then obtains a 5mL beverage sample with an unknown concentration of food dye. The class then gets a 50 mL of food dye stock in the color they were given. The class was then instructed to get five dry test tubes and number them one through 5. Using these test tubes they put in 10‚8‚6‚4‚2 mL of food dye and in inverse order put that amount in for dilution. From this the class was able to test the absorbance from this and calculate the
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Would you eat a bowl full of rat poison and call it cereal? I really don’t think you would. What about giving your child de-icing chemicals for breakfast? I think you would have to be insane in order to do that as well. I ask these questions because foods that claim to be “healthy” may contain harmful chemicals‚ many of which the average person has no idea what they really are. Do you remember the 1997 Breyers ice cream commercial that asks a very simple question— “What’s in your ice cream?” In
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Technical Bulletin A&E THREAD SIZE COMPARISON CHART Thread Construction & A&E Brand Application Perma Core ® Ultimate Ex-Light Weight Shirting & Tailored Clothing Tex Size Old A&E Tkt # Avg.* Avg.* Avg.* Cotton Ndl Sz.** Strength Strength Strength Count Min. Sz. (lbs) (grams) (cN) Far East D-Tex 180 T-16 Metric M180 89/2 66/2 1.9 844 827 65 / 9 160 M160 100/2 59/2 1.9 880 863 70 / 10 Light Weight
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Electronic Commerce in the On-line and Electronic Publishing Industry: Introduction The commercial enterprise business like several different industries has not at liberty the impact of data technology in each the assembly and distribution of the data it creates. From earliest DTP techniques to the commerce of books over the net and also the commercial enterprise of electronic journals the commercial enterprise business has promptly accepted technological innovation. several publishers are currently
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Search the web. Some interesting sites are listed below. Note that some of these sites go into much more depth than is reasonable for this course. http://en.wikipedia.org/wiki/Chromatography http://ull.chemistry.uakron.edu/analytical/Chromatography/ http://orgchem.colorado.edu/hndbksupport/TLC/TLC.html this is for TLC – similar to paper http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Chromatography_paper.html http://jchemed.chem.wisc.edu/JCESoft/Programs/CPL/Sample/modules/paprchrom/paprchromdesc
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Materials and Methods Olivia Stack and Megan Sidaway Effects of AFCs on hyperactivity in 3-year-old children in a double-blind‚ placebo-controlled experiment In the first study‚ a double-blind‚ placebo-controlled experiment‚ including three different phases‚ was carried out on 3-year-old children‚ who were registered with doctors that lived on the Isle of Wight (IOW). The study was carried out in the UK‚ and in the late 1990s. Furthermore‚ the subjects
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Bacon‚ Toast‚ Sodium Nitrate and Potassium Bromate For Breakfast Samuel Martino Have you ever looked at the ingredients on the side of a food package? There is a lot more than the main food in the package. Usually it has real food then several different chemical compounds and preservatives listed behind the real stuff. In some foods the ingredients include chemical compounds as sodium nitrate and potassium bromate. Sodium nitrite is an ionic compound and is identified by the chemical formula
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Oxalic acid Citric acid Malic acid Tartaric acid Oxalic acid is an organic compound with the formula H2C2O4. It is a colorless crystalline solid that dissolves in water to give colorless solutions. It is classified as a dicarboxylic acid. In terms of acid strength‚ it is much stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base‚ known as oxalate (C2O42−)‚ is a chelating agent for metal cations. Typically‚ oxalic acid occurs as the dihydrate with the formula
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E-Gov and Public Sector Reform: What roles for Government in e-Government? Matthias Finger Technology Policy Institute College of Management Ecole Polytechnique Fédérale Lausanne BAC 103‚ Station 5 CH-1015 Lausanne +41 21 693 00 01 matthias.finger@epfl.ch questions about privatization‚ de- and re-regulation‚ entrepreneurship and management in government‚ and others more. These questions are of course still relevant‚ even though less debated these days. The question in this paper therefore
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