syntheses has been used to generate (S)-ibuprofen isomer. The experiment part will discuss in the later section. In McCullag’s paper‚ resolution of racemic ibuprofen involved adding a resolving agent‚ (S)-(-)- phenethylamine‚ to the racemic mixture.4 The resolving agent undergo an acid-base reaction with Ibuprofen and producing two salts that are diastereomers. Scheme 1: synthesis of (S‚ S) salt and (R‚ S) salt- insoluble in aqueous solution In McCullag’s paper‚ racemic ibuprofen (1) was dissolved
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Cuvette 3 and 4 (unboiled/light and boiled/light) do not both have a higher percent transmittance. Cuvette 3 does have a higher transmittance‚ however Cuvette 4 stays for the most part‚ the same and does not have an increase in percent transmittance. For Cuvette 2 (unboiled/dark)‚ from 0 to 5 minutes‚ it increased fast but then leveled off from 5 to 15 minutes. Cuvette 3 (unboiled/light)‚ it had a steady but fast increase for the entire amount of time‚ from 0 to 15 minutes. Cuvette 4 (boiled/light)
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Willy Rupprecht Date(s) performed: October 2 - 3‚ 2012 Gravimetric Analysis of an Unknown Group 1 Metal Carbonate Purpose: The purpose of this lab is to determine the identity of a Group 1 metal carbonate compound by gravimetric analysis. Procedure: The unknown carbonate is weighed and then dissolved in water. A solution of CaCl2 (calcium chloride) is added to the metal carbonate solution to precipitate the carbonate ions as CaCO3 (calcium carbonate). The precipitate is then filtered‚ dried
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Christine Woelfel-Monsivais 10/13/14 Chem 4448.13 Lab 4: Gaussian Calculations Introduction The purpose of the lab was to gain a better understanding of the Gaussian calculations and see how the obtained calculations can be used to explore the chemistry of the atoms. In this lab several molecules were created and given specific bond lengths before running a Gaussian test for optimization and frequency. Through this test the vibrational frequency‚ force constant‚ reduced mass and point group were
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Spices--Analysis. 2. Spice plants--Composition. I. Parthasarathy‚ V.A. II. Chempakam‚ B.‚ Dr. III. Zachariah‚ T. John. IV. Title. SB305.C44 2008 641.3 ’383--dc22 2007043551 ISBN-13: 978 1 84593 405 7 Typeset by Spi‚ Pondicherry‚ India. Printed and bound in the UK by Biddles Ltd‚ King’s Lynn. Contents Contributors Preface 1 Introduction V.A. Parthasarathy‚ B. Chempakam and T. John Zachariah 2 Black Pepper T. John Zachariah and V.A. Parthasarathy 3 Small Cardamom B. Chempakam and S. Sindhu 4 Large
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Lab Four: Skeletal Tissues This week‚ we are examining tissues of the skeletal system. Specifically‚ we will investigate the process by which the long bone of the upper arm‚ the humerus‚ grows and lengthens in our patient‚ an 8-year old boy. Then‚ we will compare this process of growth with the process of healing and repair when this same patient sustains a distal end greenstick fracture of the humerus at his weekly gymnastics practice! Your assignment‚ which is worth 30 points‚ is to write
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hydrochloric acid‚ 1M sodium hydroxide‚ ammonia‚ vinegar‚ distilled water 4. pH indicator dropper bottles: bromothymol blue‚ red litmus paper‚ methyl orange‚ phenolphthalein Procedure: 1. Number the wells in the depression plate form 1-6 with the sharpie. 2. Into each well on the depression plate‚ add 10 drops of the following substances: a. Well 1: 1M hydrochloric acid b. Well 2: 1M sodium hydroxide c. Well 3: distilled water d. Well 4: milk e. Well 5: vinegar f. Well 6: ammonia 3. Test each well
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Lab #3 Atomic Structure & Classification of Matter Objectives Write the correct symbols or names of some elements. Describe some physical properties of the elements you observe. Categorize an element as a metal or nonmetal from its physical properties. Given the complete symbol of an atom‚ determine its mass number‚ and the number of protons‚ neutrons‚ and electrons. To identify and classify different types of matter. Background Primary substances‚ called elements‚
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nine times more than all the other plant materials (Figure 2). Sugarcane ended with the highest reaction rate (mean= 0.99 ± 0.070 mL/min) while wheat stalk had the lowest reaction rate (mean= 0.067 ± 0.0095 mL/min). Data Analysis 1. The null hypothesis for this experiment was that for all plant materials‚ the volume of carbon dioxide produced and the rate of carbon dioxide produced would remain constant and unchanged as the time elapsed. The Alternate hypothesis for this
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substrate fits the shape of the active site‚ the enzyme will alters its shape so the active site embraces the substrate and maintains a firm grip‚ known as induced fit. This allows for great variations of enzymes. Abstract In this experiment‚ my lab partners and I tested how time effects a catalase reaction. The amount of hydrogen peroxide was recorded after the reaction for the certain time given has taken place. We used sulfuric acid to stop the reaction with the catalase from occurring. This
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