Journal of Medicinal Plants Research Vol. 5(10)‚ pp. 2035-2040‚ 18 May‚ 2011 Available online at http://www.academicjournals.org/JMPR ISSN 1996-0875 ©2011 Academic Journals Full Length Research Paper Screening of chemical composition of essential oil‚ mineral elements and antioxidant activity in Pulicaria Undulata (L.) C. A. Mey from Iran Mehdi Ravandeh1‚ Jafar Valizadeh2*‚ Meissam Noroozifar1 and Mozhgan Khorasani-Motlagh1 1 Department of Chemistry‚ University of Sistan and Baluchestan
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Analysis of Aluminium in Potable waters by Atomic Absorption Spectrophotometric Techniques Objectives 1. To introduce the basic principles of Atomic Absorption analysis. 2. To Optimise the furnace temperature programme conditions for the analysis of Aluminium. 3. To determine the optimum conditions for the analysis of Aluminium by flame atomisation and to carry out the analysis using two seperate readouts on flame AAS instrument. Part A: Non-Flame Atomic Absorption – Electrothermal
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ACKNOWLEDGEMENTS It is usually said that no man is an island unto himself‚ and any man who so lives all by himself‚ without interacting with his fellow men is in the words of Aristotle‚ “either a beast or a god”. Mutual co-operation and interaction form the cardinal feature of human life. The task of writing this report has not‚ in the least‚ been an easy one‚ and it would be axiomatic to add that all the numerous tasks involved could not be have been accomplished successfully singly
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Individual Discussion Spectroscopy Dry Lab Lab Section M5 - Group 6 January 24‚ 2015 Discussion In this laboratory assignment‚ the spectroscopy data and molecular formula were given for 3 unknowns. An effort was made to conclusively identify these unknown samples using only the spectroscopy data‚ specifically 1H-NMR‚ 13C-NMR‚ and IR spectroscopy. Although mass spectrometry was given for the samples as well‚ its use was suggested only for confirmation‚ not identification‚ of the unknowns
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Absorption Spectra of Conjugated Dyes 04-21-2103 Introduction: The visible absorption bands or conjugated dye arise from electron transitions involving the electrons in the conjugated and they are free to move along the chain and are not attached to any atom. An example of such a dye is 3‚3-diethyl-thiacyanine iodide. The cation has two resonance forms causing each of the bonds in the conjugated chain to have an order of 1.5 and have a length similar to the C--‐C bond length in benzene
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Conversion of Alcohols to Alkyl Halides Title: Conversion of Alcohols to Alkyl Halides Abstract: In this experiment the conversion of alcohols to alkyl halides are investigated through reflux and simple distillation. These are common procedures used to separate substances. After the reflux and distillation is complete 13C NMR and IR spectrum is used to identify the product or products for each reaction: 1a‚ 1b‚ and 2. Every individual in the group was assigned either 1a (1-propanol) or 1b (2-pentanol)
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Traditional way of synthesizing sensitive rhodamine starts with rhodamine B‚ amino compound‚ and some alkali additive in the presence of weak base. However‚ for RH-PY‚ the stearic hindrance of pyrene slows the reactivity‚ and the reaction does not go to completion. Therefore‚ the reaction procedure was modified as follows. First‚ HATU and DIPEA were used to activate the carboxyl group of rhodamine B‚ then the activated rhodamine B was reacted with 1-aminopyrene. By introducing this method‚ the reaction
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Diels-Alder Synthesis of Exo-Norbornene-cis-5‚6-Dicarboxylic Anhydride for Organic Chemistry Laboratory Instruction Kyle Myers and Dr. James Roark University of Nebraska at Kearney‚ Department of Chemistry‚ Kearney‚ NE 68849 Abstract A technique for the Diels-Alder synthesis of endo-norbornene-cis-5‚6dicarboxylic anhydride and its stereoisomer‚ exo-norbornene-cis-5‚6-dicarboxylic anhydride‚ is explained. To prove that each stereoisomer was made in the experiment and to distinguish between the
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Aim Synthesis of Meso-1‚2-diphenyl-1‚2-ethanediol with focus on stereoselectivity Method Please refer to the CEM3005W practical manual for details on experimental procedure. Results and Analysis {Limiting reagent} Mass benzoin = 2.0050g (0.00945 mole) Mass sodium borohydride = 0.4059g (0.0107 mole) Mass compound A used to form compound B = 1.0647g Results Mass (g) moles Molecular formula Yield (%) Mp (pure) Compound A 1.7458 0.00815 C14H14O2 86.22 138-139 Compound C 0.4255
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Synthesis‚ Recrystallization of β-D-Glucose Pentaacetate from its Original D-Glucose and it comparison with literature though Melting point‚ TLC‚ IR‚ 1H and 13C NMR Abstract: The synthesis of the product: β-D-glucose pentaacetate is done though the acetylation using acetic anhydride with D-glucose with the help of sodium acetate. The recrystallization of the product is done though a polar solvent like water. The Result of this experiment has a percentage yield of 61% and analytical methods
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