is suggested to control the bleeding‚ John fails to let Robert know that he has been taking aspirin more often recently due to persistent headaches. John is sent home only to be rushed to the emergency room two days later and is diagnosed with having a bowel hemorrhage. II. Case Study Considerations a. Could
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The Purity and Purification of Solids- Part 2- Recrystallization Courtney Percival CH 337 Laboratory‚ Section 037 Department of Chemistry Portland State University‚ Portland OR ABSTRACT INTRODUCTION Recrystallization is a commonly used tool in laboratories when dealing with impure solids. "An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample".1 Solubility‚ the tendency of a substance to dissolve in a liquid‚ is an
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The aluminum sheets paper were sprayed with sulfuric acid in ethanol (10:90 v/v) and heated for 10 min at 110 0C to visualize saponins (Kerem et al.‚ 2005 ). Fourier tansform infrared (FTIR): Dried sea cucumber saponin extract and standard saponin(Fisher Scientific UK. Saponin
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tested for by a possible employer include Cocaine (crack)‚ Amphetamines (crystal)‚ Opiates (codeine‚ morphine‚ heroin)‚ PCP (phencyclidine)‚ and Marijuana. Gas chromatography/mass spectrometry is used to test hair and urine samples of possible drug abusers or job applicants‚ and it is the best method for the testing of drug use. Gas chromatography and mass spectrometry are two different methods for identifying chemical substances‚ and the two instruments have be coupled together to perform a highly complementary
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conduct the synthesis of aspirin‚ acquire the skills of recrystallisation using normal filtration and reinforce the technique of the melting point determination. The method used to synthesize aspirin was esterification by reacting salicylic acid with acetic anhydride with the presence of dehydrating agent‚ conc. sulphuric acid‚ to speed up the reaction. Having obtained the crude aspirin which was still impure‚ recrystallisation was conducted to remove the impurities. The aspirin harvested at the end
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Purity and Innocence –Comparing Tess Durbeyfield with May Welland Tess Durbeyfield‚ the innocent and exceptionally gifted peasant girl of decayed aristocratic stock‚ is described as “A Pure Woman” by Thomas Hardy in the novel’s subtitle; May Welland‚ a beautiful girl immersed within the New York society upbringing‚ in Newland Archer’ eyes‚ is innocent‚ childlike and carefree. But as the two plots thickened‚ Tess is regarded as impure by everyone in the novel and we realize that May is more
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Drugs screen using Thin Layer Chromatography of basic illicit drugs Abstract The majority of evidence submitted to crime labs comes from drug-related crimes. Often‚ this evidence includes unidentified powders that may be illegal drugs. In order to prosecute individuals for possession of illegal substances‚ it is necessary for forensic scientists to positively identify any suspected drugs submitted to the laboratory. In addition‚ forensic toxicologists must determine the identity
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Student ID: 4593119 Date: 7 Dec 2014 Course and Section Number: SCIN131 A004 Fall 14 Lesson 4 Lab: Chromatography and Ionic versus Covalent Bonds PART 1 Begin by viewing the following Thinkwell video 15.1.3 CIA Demonstration: Chromatography After you watch the above video‚ answer the questions below in sufficient detail: (a) (3 pts.) This video discusses 3 different types of chromatography. List each one mentioned‚ and describe their differences in as much detail as possible (your points
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5.05 Mixtures and solutions Lab report Ink Chromatography Chromatography is also used to compare and describe chemical substances. The chromatographic sequence of sorbed substances is related to their atomic and molecular structures. A change in a chemical substance produced by a chemical or biological reaction often alters the solubility and migration rate. With this knowledge‚ alterations or changes can be detected in the substance. Chromatography serves mainly as a tool for the examination and
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Introduction Flash-Column Chromatography is another useful technique used to separate and purify complex mixtures of compounds. In this experiment‚ TLC is used to determine the best solvent system for the column. Due to Flash-Column Chromatography1 being an inexpensive technique‚ many scientist use this process for drug and natural product purification. Method By using the information from Experiment 6B‚ the TLC solvent system used was 30% EtOAc: 70% Hex. Experiment 7 was broken into two parts‚
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