Food Analysis * Concerned with development of criteria of quality and identity… * Process in w/c sample is treated in a series of steps Importance: 1. It’s necessary in the dev’t and enforcement in standard of identity‚ purity and feel of processed food products. 2. It can provide studies design to improve and control the quality of natural processed food. 3. Can help in the determination of the composition of products in their normal and abnormal storage conditions. Methods
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What are the uses of quasicrystals? - They are used for surgical needles‚ razor‚ nonstick frying pan‚ and light emitting diode lights. p. 13 1. How does a magnetic tongue work? - It uses nuclear magnetic resonance spectroscopy to assess flavours. 2. Do you think the magnetic tongue is useful? Why or why not? - Yes‚ because the magnetic tongue is as good as a professional food taster when it comes to assessing flavours. 3. What is NMR spectroscopy? - It is an analytic tool that allows scientists
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Red Bull and Sugar Free Red Bull NMR Post Lab Report Abstract Viewed as one of the most significant tools in analytical chemistry‚ the Nuclear Magnetic Resonance (NMR) is a spectroscopy tool often used by chemists to determine the molecular profile – quality and quantity of the major components - of any given organic substance. Operating on basis of spectroscopy (study of the interaction between matter and radiated energy - Harris)‚ the NMR can be either a one (1H NMR) or two (1H/13C NMR) dimensional
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nitrogen. Oxygen is more electronegative‚ therefore it has a higher partial negative charge. This indicates that the reaction with the oxygen nucleophile should occur at a faster rate. The final product is determined by using proton nuclear magnetic resonance (H NMR). Oxygen appears farther downfield on an NMR because of its ability to deshield protons (4.7 ppm). Nitrogen will appear around 3.9 ppm and methlylene protons which
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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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Title: Competing Nucleophiles (Exp 24‚ pp 211-221‚ pp 808-823‚ pp 836-842) Purpose: The purpose of this experiment is to determine the nucleophilic strength of chloride and bromide ions as it reacts with 1-butanol (n-butyl) and 2-methyl-2-propanol (t-butyl alcohol) under SN1 and SN2 conditions. Method: 40 g of ice and approximately 30 ml of sulfuric acid is cautiously added to a 100 mL beaker respectively. Weigh 7.6 g of ammonium chloride and 14.0 g of ammonium bromide and place it in
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Carbohydrate Research 346 (2011) 1809–1813 Contents lists available at ScienceDirect Carbohydrate Research journal homepage: www.elsevier.com/locate/carres Investigation of the binding of roxatidine acetate hydrochloride with cyclomaltoheptaose (b-cyclodextrin) using IR and NMR spectroscopy Arti Maheshwari a‚⇑‚ Manisha Sharma a‚ Deepak Sharma b a b Department of Chemistry‚ IET‚ Mangalayatan University‚ Beswan‚ Aligarh‚ India Department of Physics‚ IET‚ Mangalayatan University‚ Beswan
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Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment‚ a nitro group was used as the substituent in the ortho‚ meta and para positions‚ with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate‚ ethyl-3-(2-nitrophenyl)acrylate
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Qualitative Analysis Lab Report Organic Chemistry Laboratory II ABSTRACT: The purpose of this lab was to separate and purify two unknown compounds‚ one solid and one liquid‚ from an ethereal solution using the techniques of chemically active extraction‚ vacuum filtration‚ simple distillation‚ and recrystallization. Then identifying information was compiled about these unknowns by obtaining experimental melting/boiling point ranges‚ and analyzing IR and proton/carbon NMR spectrums It was determined
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