CHEMISTRY OF NATURAL PRODUCTS Terpenoids Sameena Bano Department of Chemistry Faculty of Science Jamia Hamdard New Delhi-110062 (24.09.2007) CONTENTS Introduction Classification of Terpenoids Isolation of mono and sesquiterpenoids General properties of Terpenoids General methods of structure elucidation Terpenoids Citral Menthol Camphor Eugenol Keywords Terpenes‚ isoprene‚ citral‚ menthol‚ camphor and eugenol 1 Introduction There are many different classes of naturally occurring
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envy. The public is constantly bombarded with the idea that organic products are better. Perhaps this is true‚ but maybe it is brilliant marketing simply selling a status symbol. Envy can come from a neighbor’s luscious‚ organically grown front yard to the hybrid vehicle a co-worker drives‚ to the organic foods that consumers in a higher financial echelon seem to be able to only afford. Is this envy justifiable or is the notion of organics and its superiority a tactic of propaganda to boost the already
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Hartree-Fock and MP2 wavefunctions of graphene suffer from the contamination from higher spin states and spin projection method failed to project out the spin contaminants. The spin density from HF was overestimated‚ while for MP2 it has the wrong trend. B3LYP and PBEPBE wavefunctions however have negligible contamination for higher spin states. Comparison with reported results showed that the spin densities at the center of the molecule from the pure functionals of PBEPBE were underestimated. Based
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Importance of chemistry : 1. Chemistry can improve the conditions of human life and even save lives. 2. Provides deeper knowledge. 3. * Plastics that are as strong as metals but light weight. * Personal care and household products * Polymers or various sizes and shapes * Metal alloys * Drugs from various ailment CONTRIBUTION OF CHEMISTRY : 1. Food and agriculture 2. energy production 3 . environment preservation 4 . education 5 . clothing 6. colors and
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GROUND WATER THE WATER/HYDROLOGIC CYCLE * Composed of evaporation from the oceans * Movements of moist air inland * Condensation and precipitation * Run-off on the surface or sub-surface back to the ocean * Plus additional minor cycles * Involves the exchange of water with the atmosphere‚ the earth‚ and the different water forms * Done when clouds gain water vapor from the various water forms * Evaporation – process where water turns into steam or gas when the
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Hadeel Daher Mr.Geigle English 1106 12 September 2014 “Ground Zero” The incident of a terrorist attack that occurred in New York City on the twin towers but also the pentagon was another target that was aimed for‚ only this one happened in Washington D.C. Both of these incidents come hand in hand and are rooted in America’s history‚ due to all of the American families who lost a loved one or a close relative. This impact was very hard to endure for many American hearts. September 11‚ 2001
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• Calculate mass of solute needed to create a solution of a given molarity and volume • Solve dilution problems: M1V1 = M2V2. • Calculate empirical formula from mass or percent using experimental data. • Calculate molecular formula from empirical formula given molecular • Calculate molecular formula from empirical formula given molecular weight • Determine percentage composition by mass of a given compound • Perform calculations based on percent composition.
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= CH2 + [O] + H2O → CH2 – CH2 ⏐ ⏐ OH OH (a) Insert a glowing splint into the hydrocarbon hydrocarbons: Burns with smoky flame Aromatic hydrocarbons (b) Add concentrated nitric(v) acid and concentrated sulphuric acid at 55 °C: Yellow oil with bitter almond smell produced benzene NO2 + HNO3 (HONO2) Alkylbenzenes – CH3 CH3 + H2O Add alkaline KMnO4 and boil: Decolourisation of KMnO4; brown precipitate of MnO2 formed ⎯ CH3 + 3[O] methylbenzene H2SO4 ⎯ COOH
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Extracting DNA from Wheat Germ Cells Criteria to be assessed CE Introduction: DNA is the abbreviation for deoxyribonucleic acid. DNA is found in the nucleus of every cell & it stores the information that makes up living organisms. It is a double helix of 4 nucleotides. It contains a code that allows the body to make up proteins. The nucleotides are Cytosine‚ Guanine‚ Adenine and Thymine. (1) Wheat germ comes from wheat seeds. The ’ germ ’ is the embryo‚ which is the part of
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Organic Food How popular is this product? By Takahiro Hashiguchi & Pascual Retamero Sub-headings What is "Organic Food"? Where are these products situated and how are they promoted in the supermarkets? How does the price of these goods compare with non-organic food items? What information is given on the label of these products? How many people actually buy these products? What is your opinion on these products What is Organic Food? Definition
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