recrystallization. This experiment includes the determination of a good solvent for recrystallization for compounds such as: acetanilide‚ acetamide‚ aspirin‚ benzoic acid‚ naphthalene‚ and sucrose‚ for solvents such as: water‚ ethanol‚ benzene‚ and ethyl acetate. Also pure acetanilide is achieved. here are five major steps in the recrystallization process: dissolving the solute in the solvent‚ performing a gravity filtration‚ if necessary‚ obtaining crystals of the solute‚ collecting the solute crystals
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HPTLC and 0.05g of the crystallised product above was placed into a sample vial which contained 1cm3 of ethyl acetate solvent shaken and dissolved. This sample of synthesised solution and a further two other solutions of pure paracetamol and 4- aminophenol solution sample were separately loaded by capillary action in different positions. These were then placed in a jar containing ethyl acetate (2cm3) and the results were visualized under the UV
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S OUTHEAST ASIAN J T ROP MED P UBLIC H EALTH ANTI-HEAD LICE EFFECT OF ANNONA SQUAMOSA SEEDS Junya Intaranongpai 1‚ Warinthorn Chavasiri 2 and Wandee Gritsanapan 1 1 Department of Pharmacognosy‚ Faculty of Pharmacy‚ Mahidol University‚ Bangkok; Department of Chemistry‚ Faculty of Science‚ Chulalongkorn University‚ Bangkok‚ Thailand 2 Abstract. The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa
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Lab #4 May 26‚ 2015 Diels Alder Reaction Introduction: Diels Alder Reaction is the reaction of a diene with a species capable of reacting with the diene‚ the dienophile. A diene is a hydrocarbon that contains two carbon double bonds‚ while a dienophile is an electron-deficient alkene. The Diels-Alder is also called a [4+2] cycloaddition because a ring is formed by the interaction of four pi electrons of the alkene with two pi electrons of the alkene or alkyne. The product of the Diels-Alder
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Essential oil and extracts showed promising results against B subtilis and E coli. Ethyl acetate and ethanol extracts showed prominent antibacterial activity against all tested strains. • Antibacterial / Leaf‚ Flower and Fruits: Study of extracts of leaf‚ flower and fruit of VN was done to evaluate in vitro antibacterial activity against phytopathogens Pseudomonas solanacearum and Xanthomonas axonopodis. The ethyl acetate extract showed significant inhibition. Phytochemical screening yielded alkaloids
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Over the past four years‚ the rate of autism diagnosed has increased over 30%. Autism spectrum disorder is a neurodevelopmental disorder in which the diagnosed exhibit social and behavioral deficits. Since autism is a life-long impairment‚ researchers are attempting to rapidly find the causes in the hope to find a cure. It is theorized that prenatal hormone exposure could potentially result in ASD. Therefore‚ the prenatal hormones estradiol and dihydrotestosterone were subcutaneously injected into
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Group VI Group Members: Esguerra‚ Jezreel Legaspi‚ Divine Rose Gutierrez‚ Joandra Pintor‚ Karlo Date Submitted: March 13‚ 2014 Professor: Ms. Jenette Malaban Activity 6: Fecal Analysis for the Detection of Parasites I. Objectives: 1. T o perform the basic techniques in fecal and blood analyses. 2. To identify parasitic forms that are recognizable in the fecal samples and blood smears by microscopy. 3. To determine the advantages and limitations in each procedure. II. Methodology
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Date: May 22‚ 2012 Name: Cristhian Valor Organic Laboratory Pre-Lab 1. Main reaction sequence including side reaction products: 2. 3 Sentence Summary of the Experiment: The OH group on the benzene ring in salicyclic acid reacts with acetic anhydride to form an ester functional group. Thus the formation of acetylsalicyclic acid (aspirin) is referred to as an esterification reaction‚ which requires the presence of H+ (H2SO4 in our case). The technique used to purify the aspirin content
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Perfume is made from about 78% to 95% is made from ethyl alcohol and essential oils. Perfume ingredient can cause health or environmental problems when used or abused in large quantities either it is natural or synthetic. In some perfumes it can cause unwanted reaction to some people‚ especially people with asthma ‚Sometimes if the perfume is used in large amount it may cause allergic reactions to the skin. Like the substance ethyl acetate and acetone that is present in most perfumes they are
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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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