How to Review for the MCAT You want to review for the MCAT in the most efficient way. First‚ review only the topics that will be on the exam. Second‚ review these exam topics with the test in mind. What this means is that you must do content review in conjunction with working real exam questions. If you just do content review alone‚ then you’ll end up forgetting most of what you went over. However‚ if you work MCAT problems while doing content review‚ you’ll retain most of what you learned. Incidentally
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sources: Oil‚ margarine‚ dairy blends Salad dressings Fried snack foods Pastry‚ scones‚ biscuits Note: natural antioxidants are OK – includes vitamin C (codes 300 –304)‚ Vitamin C derivatives (codes 317‚ 318) & Vitamin E (codes 306 –309) SORBIC ACID & SORBATES (200 – 203) • Inhibit growth of yeast & moulds‚ between pH 4-6. Limited effect on bacteria‚ so often used as a cheese preservative (allows fermentation
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Indian generic drug companies. Facts of the case Roche‚ along with Pfizer (as a joint applicant)‚ claimed that it had been granted a patent in February 2007 for ’erlotinib’‚ the molecular [6‚ 7-bis (2-methoxyethoxy) quinazolin-4yl]-(3-ethynylphenyl) amine hydrochloride. The patented product‚ which Roche introduced onto the Indian market in 2006‚ was marketed under the brand name TARCEVA. In December 2007 and January 2008‚ Indian newspapers reported Cipla’s plan to launch a generic version of ‘erlotinib’
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and purify the unknown D liquid and solid by using its acidic and basic characteristics in a chemically active extraction then to identify the unknowns by analyzing the physical properties on IR and NMR spectrums. The neutral solid was purified through recrystallization and the melting point range was determined to be 47.5oC to 48.9oC. The basic liquid was purified with simple distillation and the boiling point of 135oC was concluded. Through the analysis of IR spectrum of each unknown the structures
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Amino Acids Glycine is the smallest of the amino acids. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. In aqueous solution at or near neutral pH‚ glycine will exist predominantly as the zwitterion. Alanine is a hydrophobic molecule. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. The α carbon of alanine is optically active; in proteins‚ only the L-isomer is found. Serine differs from alanine in that one of the methylenic
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pair onto the amide oxygen (which makes the lone pair less available to the aromatic ring) and the increased steric bulk of the group‚ favouring substitution at the 4-position over the 2-positions which it shields. Aniline is the simplest aromatic amine and is synthesised by first nitrating benzene using a concentrated mixture of nitric acid and sulphuric acid to give nitrobenzene which is then hydrogenated in the presence of a nickel catalyst to give the final product. Aniline undergoes very readily
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conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the identity of an unknown compound (1). It is imperative that
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Acetaminophen | 0.323 | Aspirin | 0.597 | Caffeine | 0.081 | Unknown 154 (Plate 1) | 0.081‚ 0.306‚ 0.597 | Ibuprofen | 0.698 | Salicyclamide | 0.587 | Unknown 154 (plate 2) | 0.079‚ 0.397‚ 0.587 | Discussion: The goal of this experiment was to use TLC Analysis to determine the analgesic drug present in the unknown solution 154. One observation of the unknown spotting solution was that it was cloudy. After forming the unknown spotting solution it was then heated to make it a more saturated
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our experiment‚ we test several unknowns. To identify our unknowns we have to compare our spectrums to a known sample. From the 2 unknown samples‚ we cleaned the surface of the sample area and used powder into the IR. Our sample was added to the center of the platform and let the data collect for about a minute. We knew the sample was ready when the spectra appeared on the screen. We used the computer to perform the instrument operations yielding us with 2 unknowns. To analyze our spectra‚ we printed
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I. Abstract The experiment: Classification tests on Organic Compounds‚ allows the students to be familiarized with different classification tests used for identifying the different classes of organic compounds; examine unknown compounds using appropriate tests; and identify functional group of an organic compound based on the tests performed. Several organic compounds with different functional groups were tested to identify the functional groups present in the compound. n-heptane‚ pentene
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