Required Vocabulary – IB 12 Higher Level Physics and Physical Measurement 1. Fundamental Units – seven basic units of the SI measurement system: kilogram‚ second‚ mole‚ meter‚ ampere‚ Kelvin‚ candela. 2. Derived Units – units that are combinations of fundamental units. These combinations may or may not have a separate name. (eg. 1 kg m/s2 = 1 N) 3. Accuracy - An indication of how close a measurement is to the accepted value (a measure of correctness). 4. Precision - An indication
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Abstract Various types of reactions were completed to first create and then use Jacobsen’s catalyst in the asymmetric epoxidation of an unknown alkene with bleach in the laboratory. The chiral epoxide synthesized was then characterized with GC/MS and NMR. With this information the unknown alkene was able to be identified as 4-chlorostyrene. Introduction Organisms have evolved with mechanisms that use specific enantiomers of molecules. If the chirality of the molecules is incorrect‚ they may not
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Rev. Richard Ramsey Advanced Theoretical Physics 301 November 26‚ 2010 1. Introduction Quantum entanglement is ubiquitous‚ appears everywhere in the microscopic world (See‚ e.g.‚ Durt‚ 2004; Brooks‚ 2005) and under some circumstances manifests itself Macroscopically (Arnesen‚ et al‚ 2001; Ghost et al‚ 2003 & Julsgaard et al‚ 2001). Indeed‚ it Is currently the most intensely studied subject in physics. Further‚ speculations
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Tatiana Pachova BSc‐2‚ chemistry Assistant : Chandan Dey Sciences II – lab. A Nitration of bromobenzene (n°28) 1. INTRODUCTION 1.1) 1.2) Purpose The objective of this experiment is to synthesize the p‐bromonitrobenzene (bromo‐1‐nitro‐4‐benzene) out of bromobenzene‚ by nitration. Scheme Br Br HNO3 / H2SO4 Mechanism The first step is the formation of the NO2 from the nitric acid: NO2 1.3) O O S N
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CHEM%2315%Fall%2014% Creating useful and beautiful molecules using synthetic organic chemistry – Synthesis of Aspirin and Indigo INTRODUCTION Aspirin Salicylic acid occurs naturally in the bark of willow trees. Prior to the 1800’s‚ willow bark was often brewed into a tea‚ or chewed to relieve pain. While the salicylic acid is effective at reducing pain it was found to irritate the lining of the stomach. It was mostly by chance that on August 10‚ 1897 Felix Hoffmann‚ a German chemist who obtained
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natural essential oils shown to have bug-warding abilities include oil of citronella (found most often in candles‚ though it is somewhat effective on the skin)‚ rosemary‚ and lemon verbena. One recent study indicated that a compound in sweet basil (eugenol) might also be as effective as DEET (N‚N-Diethyl-meta-toluamide) against ticks. To make your own natural repellent‚ simply add three drops of pure essential oil to a teaspoon of a carrier oil such as coconut or jojoba. If you choose to go the natural
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Experiment 2: Fractional Distillation of a Mixture of Two Unknowns Background: Boiling is a process familiar to anyone who has cooked pasta or brewed tea. As heat is applied to a pan of water‚ the temperature of the water increases until it reaches 100°C (212°F). At this temperature‚ additional heat causes the water to bubble vigorously as the liquid water is converted into gaseous water‚ or steam. Most organic liquids will behave in a similar fashion. On heating‚ the temperature of the liquid
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Part 5: Synthesis‚ characterization and evaluation of COS-SMCC-(fatty acyl) CGKRK as in vitro gene delivery system to MDA-231 The delivery of siRNA is a great challenge due to its susceptibility to serum nuclease digestion‚ quick renal clearance. In addition to its anionic charge which hampers its cellular uptake. Therefore‚ the success of the gene carrier system relays on‚ the design of a delivery system that can protect siRNA molecules from enzymatic degradation‚ the ability to translocate the
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Research Question: Should Proton move on to market -orientation method in order to maintain its market standing from Toyota in Malaysia ? Nature of Business : Proton (Automotive marketing) Issue background :Proton which is the national car manufacturer of Malaysia decided to inject new models and increase the volume of production which is like putting salt into the wound despite of the ailing sales in 2012 which made them being threat by increasing marketing performance by Toyota and the reducing
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Chemistry 2283g Experiment 1 – Alkyl Halides EXPERIMENT 1: Preparation and Reactivity of Alkyl Halides Relevant Sections in the text (Wade‚ 7 ed.) • 6.7 (p. 228) Reactions of alkyl halides • 6.8 – 6.12 (p. 229 – 242) The SN2 reaction: generality‚ factors affecting SN2 reactions‚ substrate reactivity‚ mechanism • 6.13 – 6.14 (p. 243 – 249) The SN1 reaction: mechanism‚ stereochemistry General Concepts The most common of the variety of methods available for preparing alkyl halides is the replacement
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