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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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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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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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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China Coin Politics in Children’s Novels: The China Coin by Suzanne Wilson Novels for children which encompass notions about history‚ about culture‚ and about politics‚ have been around ever since a ’children’s literature’ was recognised as something distinct from books for adults. Indeed it is difficult to imagine something more political in its content and aspirations than Charles Kingsley’s The Water Babies. But what is interesting today in the light of books for children now being
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Leah’s Suitcase The last time she went on a trip like this she forget to bring some important things‚ so this time she won’t forget. This time she will be packing her dad’s Coin because the has sentimental values to her‚ this was what her dad always talked about before he died and also because this is what her dad was so found of. Some money about $50-100 Australia‚ (which is about 300-600 Yuan in Chinese). She would need this to help her get around‚ buy food and if she gets lost by any chance
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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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"the China Coin"‚ "Through Australian eyes"‚ "The road not taken" and "The journey"‚ Journey is demonstrated when they take holidays or go on a trip to somewhere special and yet it also involves with self exploration and to broaden their perspectives as individual develops their experiences to grow‚ be challenged and to be inspired. In "The China Coin" written by Allan Baillie‚ the main characters Leah and Joan went on a journey to china in purpose to find out the mystery of the broken coin. As the
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Introduction Silver is a chemical element with atomic number 47 and symbol Ag. It is white‚ soft‚ mallable and ductile metal slightly harder than gold. Silver is extremely flexible‚ this means that it can be converted into both flat sheets and electrical wire. This makes silver is an ideal metal for all kinds of industrial use. Silver occurs in lead‚ Zinc and copper ore deposits. Lead ore is the main source of Silver. In fact‚ 75% of the resources in the world are found in association with other
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