UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level * 2 3 0 8 9 6 9 9 7 3 * BIOLOGY Paper 5 Planning‚ Analysis and Evaluation Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black ink. You may use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters
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VRAJESH PATEL April 20‚ 2013 TITLE: Structure Elucidation of Organic Compounds Using Infrared Spectrometry and Computer Molecular Models. OBJECTIVES: Using the Spartan Student v5.0.0. Software in computer‚ determine the absorption frequencies of C=O str.‚ C-H str.‚ and C-H bend in the following molecules: 1. Benzaldehyde 2. Ethyl Benzoate 3. 3-Pentanone 4. Pentanal * For given unknown Infrared spectra‚ figure out the compounds based on the absorption
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Determination of % Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Introduction: Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL‚ then the theoretical yield of copper should be equivalent to the actual yield. Purpose: In this lab‚ we will determine the percent composition of a modern (post-1982) penny by using a strong acid to react and dissolve the zinc
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S OUTHEAST ASIAN J T ROP MED P UBLIC H EALTH ANTI-HEAD LICE EFFECT OF ANNONA SQUAMOSA SEEDS Junya Intaranongpai 1‚ Warinthorn Chavasiri 2 and Wandee Gritsanapan 1 1 Department of Pharmacognosy‚ Faculty of Pharmacy‚ Mahidol University‚ Bangkok; Department of Chemistry‚ Faculty of Science‚ Chulalongkorn University‚ Bangkok‚ Thailand 2 Abstract. The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa
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Every year we celebrate National Science Day on 28th February to honour our Nobel laureate Sir Chandrasekhara Venkata Raman for his invention of the Raman effect through his experiments on the scattering of light. Nation pays tribute and expresses gratitude to Sir CV Raman and to all the scientists on this day for their genius and dedication. It is a day‚ which attracts many young minds to take up science as their career and a day to see novel scientific achievements. The basic objective of observation
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Experiment 1: Mechanism of Nitrile Oxide and Alkene Cycloaddition 1. Purpose: to clarify the mechanism for the cycloaddition reaction between benzonitrile oxide and an alkene‚ and to test the regiochemistry of the reaction between benzonitrile oxide and styrene. 2. Plan: Each student in a group of three will work to create a reaction with the Benzonitrile Oxide with‚ cis-stilbene‚ trans-stilbene‚ or styrene in an Erlenmyer flask. With this Reaction solution thin layer chromatography will be
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In 1928‚ Raman spectroscopy was introduced by Sir Chandrasekhara Venkata Raman an Indian Physicist‚ together with K. S. Krishnan. For this tremendous contribution in Physics‚ Sir C. V. Raman got Nobel prize in 1930. Write something about Raman signal‚ where does it come from? What are the implications of Raman? Raman is the inelastic scattering of light. The meaning of inelastic scattering is observable from the figure below. When an electron is excited by photons of applied light‚ it jumps from
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National Science Day Related Links Introduction History Time to celebrate Introduction: Rashtriya Vigyan Evam Prodoyogiki Sanchar Parishad (RVPSP) (National Council for Science & Technology Communication) of the Ministry of Science and Technology celebrates National Science day (NSD) to popularise the benefits of scientific knowledge and pratical appropriation. Various activities are organized on the day like debates‚ quiz competitions‚ exhibitions‚ lectures‚ etc.‚ in which college students
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Study Guide: Exam 1 1. How many different kinds of protons are present in each of the following compounds? A. a: 4; b: 4; c: 4 B. a: 4; b: 4; c: 5 C. a: 3; b: 3; c: 5 D. a: 3; b: 4; c: 5 E. a: 4; b: 3; c: 5 2. Which of the labeled hydrogens absorbs furthest upfield in the NMR? A. Ha B. Hb C. Hc D. Hd E. He 3. Which of the following compounds does not give a singlet in its NMR spectrum? A. A B. B C. C 4. Which of the circled protons in the molecules below would absorb furthest
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I have been interning at an endoscopy center for almost a month and I have made progress from weeks one and two. I was mainly observing within these weeks. In these 3-4 weeks I continued to observe but was able to now put observing into the works. In health informatics/health policy I learned about HIPPA act and what would be considered violation of this act. I noticed at times the physician would leave the patients EHR open in which others can see it. I would minimize that screen so that others
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