Abstract – The synthesis of 4-hydroxy-4‚4-diphenylbutn-2-one was a three week multi-step project. The steps involved protecting the ketone of ethyl acetoacetate with a ketal group‚ followed by preparation and reaction with Grignard‚ then purification by extraction and recrystallization. The yield was 78.5%‚ but there are impurities present suggested by 1H-NMR‚ IR‚ and TLC. However‚ the results do indicate the desired hydroxyketone was formed. Introduction: The purpose of this multi-step lab
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During protein digestion‚ a water molecule is added which breaks down the carbonyl-carbon-nitrogen sin the peptide bonds of proteins causing the liberation of amino acids. This process is referred to as proteolysis. Water molecules break down the carbonyl-carbon-nitrogen single bond (peptide bond) that holds single amino acid molecules together (Caroline Ritchie‚ 2013. This process is called hydrolysis and is catalysed by protease. The three main protease enzymes produced during digestion are pepsin
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5.4.1: Synthesis of a Protein Procedure 3. Transcribe the DNA into mRNA Sequence A: AGA AGG GAG GAU UUG CAA GGU GGC CAA GAA UUA GGC GGC GGU CCC GGG GCG GGG AGU CUU CAA CCA Sequence B: AGU CUG CAA AAA CGG GGC AUU GUU GAA CAA UGU UGU ACC AGU AUU UGC AGU CUC UAC CAG UUC GAG AAU UAC UGA Sequence C: AUG UUU GUA CAU UUG UGU GGG AGU CAC CUG GUU GAG CGU UGU AUU UGG UUU GUG GCG AGC GCG GCU UUU UCU AUA 4. Beginning sequence: Sequence C since it starts with AUG (the starting codon) Middle sequence:
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4/27/11 SYNTHESIS AND CHEMILUMINESCENCE OF LUMINOL Abstract: Chemiluminescence occurs in nature and can be found in everyday products. For example‚ the light omitted by fireflies‚ deep sea fish and glow sticks is a result of this process. Luminol was synthesized from from 3-nitrophthalic acid and then combined with potassium ferricyanide and hydrogen peroxide to omit a blue light. The product of this reaction is very unstable and is made by losing a nitrogen and the electrons go from an excited
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Acids And BAses Acids And BAses 8.1 8.2 8.3 8.4 18.1 18.2 18.3 18.4 18.5 Theories of acids and bases Properties of acids and bases Strong and weak acids & bases The pH scale Calculations involving acids and bases (AHL) Buffer solutions (AHL) Salt hydrolysis (AHL) Acid-base titrations (AHL) Indicators (AHL) 8 8.1 THeORies OF Acids And BAses 8.1.1 Define acids and bases according to the Brønsted–Lowry and Lewis theories. 8.1.2 Deduce whether or not a species could act as a Brønsted–Lowry
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Synthesis of Methyl Stearate The purpose of this lab was the convert liquid methyl oleate to solid methyl stearate by catalytic hydrogenation. Firstly‚ we produced hydrogen gas using solid mossy zinc and sulfuric acid. Using the hydrogen produced in the previous reaction‚ we were able to convert the liquid methyl oleate to solid crystals of methyl stearate. A mineral oil was also used to bubbler was used to maintain the hydrogen pressure slightly above the atmospheric pressure and to prevent back-diffusion
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SYNTHESIS OF AN ALKYL HALIDE S.M. BLANCAFLOR1 1INSTITUTE OF BIOLOGY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: 3 JANUARY 2012 DATE PERFORMED: 8 DECEMBER 2011 ------------------------------------------------- ABSTRACT Alkyl halides are molecules which have a carbon atom attached to a halogen atom (e.g.‚ chlorine‚ iodine‚ or bromine.) Alkyl halides are very important since they are used in many of the products used today
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Prelab 5B Macrocyclic Synthesis OBJECTIVE: The objective this week is to produce Tetraphenylporphyrin and its metal complex. This will be carried out by condensation of 4 equivalents of Benzaldehyde and pyyrole in the presence of propanoic acid. The product will undergo UV/Visible Spectrum tests to determine its lambda max. The lambda max will show us the relationship between a conjugated system and the visible spectrum. PROCEDURE: Step 1: preparation of meso-tetraphenylporphyrin (TPP)
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EXP-10 CHEM 233L SYNTHESIS OF p-BROMOANILINE Introduction: In this experiment‚ p-bromoaniline was synthesized in three steps starting from aniline. Since the amino group of aniline is a strong activator of aromatic ring‚ direct bromination is impractical (equation 1). In order to make a desired product‚ amino group needed to be protected as the acetamide which also maintained ortho and para position but slowed down the rate of reaction (equation 2). Slow reaction rate would increase
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Lab #4 The Synthesis of Organic Polymers CHM2123‚ Section C October 21‚ 2014 Introduction: Organic polymers are macromolecules that are composed of smaller molecules called monomers. There are two main groups of polymers: natural polymers and unnatural (synthetic) polymers. Natural polymers include proteins such as cellulose and starch and are a necessity for our existence. On the other hand‚ synthetic polymers such as the polycarbonate in our lab goggles
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