Multistep Synthesis of Tetraphenylcyclopentadienone Author: Instructor: Date work performed: 10.18.2012--10.25.2012 Date work submitted: 11.01.2012 Abstract: The aim of this experiment was to perform a multistep synthesis to form tetraphenylcyclopentadienone. The first step of the reactions was to synthesize benzoin from the condensation of benzaldehyde. A yield of 28.91% benzoin was obtained. The MP of benzoin was 127O-130O C and the IR spectra displayed a carbonyl peak at 3415 cm-1
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(2) ATOMIC ABSORPTION SPECTROSCOPY OF THE MIXTURE Experiment 4 Dates of Experiment: 10/14/08 through 10/30/08 Date of Report: 11/7/08 Chem 2262L � I. Introduction In this experiment‚ the zinc and nickel contents of unknowns were tested using two methods. In the first method‚ nickel and zinc were separated through ion-exchange chromatography and analyzed through chelometric titration. In the second method‚ the unknown was analyzed through the atomic absorption spectroscopy (AAS) of the mixture
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Chem 253 - Organic Chemistry I Lab 10: Isolation of Identification of the major constituent of clove oil 3/15/2012 Purpose: The purpose of this lab was to isolate the cove oil from ground cloves and determine the identity of the major constituent that is known to have the molecular formula C10H12O2 through IR spectrometry. Theory: Many people search for alternative ways to treat illnesses other than the conventional use of drugs and surgery. These alternative ways include aromatherapy‚
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of this experiment was to successfully prepare an endo‚cis-diacid from the synthesis of the bicyclic anhydride (cis-Norbonene-5‚6-endo-dicarboxylic anhydride). The percent yield of the product was calculated and found to be 39.01%. The infrared spectroscopy confirmed the presence of a O-H group with a stretch at 2948.03 1/cm and the presence of C=O with a stretch at 1698.93 1/cm. Melting point determination found the melting point range of the products to be 149.2-164.1 for the bicyclic anhydride
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What is Chemistry? Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics‚ by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter‚ particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom‚ as well as the subatomic realm. Really‚ they are two sides of the
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family Lauraceae‚ a group of evergreen trees. Cinnamon bark (particularly C. verum) yields 0.4-0.8% oil‚ which contains 60-80% cinnamaldehyde‚ 4-5% sesquiterpenoids (α-humulene‚ β-caryophyllene‚ limonene and others)‚ eugenol‚ cinnamyl acetate‚ eugenol acetate‚ cinnamyl alcohol‚ methyl eugenol‚ benzaldehyde‚ benzyl benzoate‚ cuminaldehyde‚ monoterpenes (linalool‚ pinene‚ phellandrene and cymene)‚ safrole and others (List and Horhammer; Masada; Ravindran qtd. from Khan and Abourashed‚ 2011). Isolation of
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LIST OF INSTRUMENTS FOR DENTAL CLINIC 1.DENTAL CHAIR WITH MOTORIZED SUCTION. 2.COMPRESSOR 3.DIGITAL X RAY UNIT (RVG COMPAITABLE) 4.SCALER 5.MICROMOTOR WITH CONTRANGLE & STRAIGHT HANDPIECE. 6.LIGHT CURE UNIT. 7.RVG 8.INTRA ORAL CAMERA. 9.ENDO MOTOR 10.APEX LOCATOR. 11.ELECTRO CAUTERY UNIT/LASER 12.CLINIC MANAGEMENT SOFTWARE. 13.RUBBER DAM LIST OF CLINICAL INSTRUMENTS---- 1. Mouth mirror 2. Explorer 3. St.probe’ 4. Tweezer 5. Endo box 6. Endo guaze 7. Flexible files 8. K files
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9.1 PRELIMINARY STUDIES: 9.1.1. Identification and Analysis of Drug: Determination of λmax of by UV spectroscopy: The λmax of the solution of Pantoprazole was found to be 290 nm on UV spectroscopy. Melting point determination of drug: The melting point of drug was found to be 136±3 ̊C. Solubility determination of pantoprazole: The solubility of drug was determined and it is soluble in water‚ ethanol and slightly soluble in DCM. Solubility determination of excipients: Excipient Medium
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guide in this field of Semiconductor Laser Diodes. I would also like to thank Abhishek Upadhyay (P.G. student) for giving me insights into the concepts of semiconductor laser diode. ABSTRACT: Recent calibration‐free tunable diode laser spectroscopy (TDLS) techniques have shown that knowledge of the modulation characteristics of the laser is critical to achieve optimum performance of the sensor. This report investigates the intensity modulation characteristics of a near‐infrared
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History Alexander Gurwitsch around 1930 Around 1923 Alexander Gurwitsch discovers an "ultraweak" photon emission from living systems (onions‚ yeast‚...)‚ since he suggested connections between photon emission and cell division rate. He calls this photonemission "mitogenetic radiation". His experiments indicate that the wavelength is in the range around 260 nm (Bibliography under Gurwisch and also Ruth (1977‚ 1979)). Around 1950: Russian scientists rediscover "ultraweak photon emission"
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