Mint‚ and Edward Bruce‚ Director of the Section of Painting and Sculpture‚ inspect candidates for the design of the new Jefferson nickel‚ April 1938 The design for the Buffalo nickel is well regarded today‚ and has appeared both on a commemorative silver dollar and a bullion coin. However‚ during the time it was struck (1913–1938)‚ it was less well liked‚ especially by Mint authorities‚ whose attempts to bring out the full design increased an already high rate of die breakage. By 1938‚ it had been
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2010 Eng 101 There are very few material things in this world that I consider important to me but the few that are tell a story about my life. I have been awarded several medals from the United States Army; though all are important to me the one medal of seven that bears the most significance is the Army Achievement Medal for my service on funeral detail. I was put on funeral detail at the end of my contract with the US Army. At the very beginning I felt as though it was more of a burden that
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each other (groups of twos) in test tubes to test which reaction will result in an insoluble solid. See method for more detail. It is expected that the following compounds will form precipitates Silver Sulphate‚ Copper Hydroxide‚ Copper Iodide‚ Silver Hydroxide‚ Silver Iodide‚ Cobalt Hydroxide and two Silver Chlorides. This was worked out by completing the double displacement reactions and using a table of solubilities. (See appendix one & two) In any experiment involving chemicals a hard wearing
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View Article Online / Journal Homepage / Table of Contents for this issue Green Chemistry Cite this: Green Chem.‚ 2011‚ 13‚ 2638 www.rsc.org/greenchem Dynamic Article Links CRITICAL REVIEW Green synthesis of metal nanoparticles using plants Siavash Iravani* Received 10th April 2011‚ Accepted 20th July 2011 DOI: 10.1039/c1gc15386b In recent years‚ the development of efficient green chemistry methods for synthesis of metal nanoparticles has become a major focus of researchers. They have
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emergency plan of how to deal with and respond to different types of major incidents. Command and Control‚ Gold‚ Silver and Bronze Command and control is used by the public services to effectively control an emergency situation or incident and communicate between the other public services and responding agencies the command and control structure is split into three categories gold‚ silver and bronze. Gold: Strategic Command This level of command is the strategic command element that will oversee the
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broadened the provisions of previous U.S. law addressing the unauthorized wear‚ manufacture‚ or sale of any military decorations and medals. The law made it a federal misdemeanor to falsely represent oneself as having received any U.S. military decoration or medal. If convicted‚ defendants might have been imprisoned for up to six months‚ unless the decoration lied about is the Medal of Honor‚ in which case imprisonment could have been up to one year (Wikipedia). I personally don’t have any family members
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Elizabeth Au (1) Serena Chan (3) Sharon Chan (4) Christy Chan (5) BIOLOGY LAB REPORT Investigation of the effect of metal ions on enzyme activity Objective To study the effect of two heavy metal ions‚ lead (II) ions and silver ions on the enzyme activity of invertase. Introduction Hypothesis: The rate of enzyme reaction of invertase decreases and the reaction eventually stops as the heavy metal ions inhibit the enzyme reactions. Biological principle: Heavy metal ions are non-competitive
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precipitation reaction could be used to separate and remove silver ions from a mixture containing iron (III) and zinc ions? A precipitation reaction that could be used is hydrochloric acid Ag+(aq) + HCl(aq) AgCl(s) +H+(aq) – white. 2. What precipitation reaction could be used to separate and remove iron (III) ions from the remaining mixture containing iron (III) and zinc ions? Fe3+(aq) + 3NaOH(aq) Fe(OH)3(s) + 3Na+(aq) 3. How can the presence of silver ions be positively identified? AgCl(s) +2NH3(aq)
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1. Identify at least 10 minerals that are abundant in the Philiipines. Gold‚ Copper‚ Chromite‚ Platinum‚ Gravel‚ Silver‚ Nickel‚ Iron‚ Marble‚ Sulfur 2. Describe the characteristic features of each minerals. Gold- soft‚ lustrous yellow‚ malleable metal. It is one of the transition metals. It is highly sought after precious metal in jewelry Copper- is valued for strength‚ malleability‚ ductility‚ and ability to conduct electricity and heat. It is also non-magnetic‚ resists wear‚ and forms
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Whilst in Britain‚ Nancy became one of the 39 women and 430 men in the French section of the British Special Operations Executive‚ which worked to sabotage the Germans in occupied territories. She trained at a Defence Camp to learn survival skills‚ silent killing‚ codes‚ radio operation‚ night parachuting‚ plastic explosives‚ Sten rifles‚ pistols‚ and grenades. She and a few other women were assigned to the First Aide Nursing Yeomanry and the illicit nature of their work remained a covert secret
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