Durstock‚ Liming Dai‚ Nitrogen-Doped Carbon Nanotube Arrays with High Electrocatalytic Activity for Oxygen Reduction‚ DOI: 10.1126/science.1168049 ‚ 760 (2009); 11. Chunzhi H‚ Sanket Desai‚ Garth Brown‚ and Srinivas Bollepalli‚ (2005)‚ PEM Fuel Cell Catalysts: Cost‚ Performance‚ and Durability‚ The Electrochemical Society Interface. 12. Kamaruzzaman Sopian‚ Wan Ramli Wan Daud‚ (2006) Challenges and future developments in proton exchange membrane fuel cells Renewable Energy 31 719–727. 14. R.L. Borup and
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hydrogen and oxygen. Peidong Yang‚ a chemist working on the initial project‚ describes the Leaf as an “artificial photosynthetic system composed of two semiconductor light absorbers‚ an artificial layer for charge transport‚ and spatially separated co-catalysts” that “very much resemble an artificial forest”. Peidong Yang continues to describe the process of energy transformation as an integration of “our nanowire nanoscale heterostructure into a functional system that mimics the integration in chloroplasts
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Enzymes (pron.: /ˈɛnzaɪmz/) are large biological molecules responsible for the thousands of chemical interconversions that sustain life.[1][2] They are highly selective catalysts‚ greatly accelerating both the rate and specificity of metabolic reactions‚ from the digestion of food to the synthesis of DNA. Most enzymes are proteins‚ although some catalytic RNA molecules have been identified. Enzymes adopt a specific three-dimensional structure‚ and may employ organic (e.g. biotin) and inorganic (e
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The catalysts remain unchanged throughout the entire reaction because they are not part of the reactants or products. When chemical reactions happen‚ the chemical bonds of the reactants are rearranged (7). The rearrangement of chemical bonds‚ called the transition
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used to liquefy coal? Guiding questions: 1. Why is liquefaction of coal important? 2. What are the usual processes used to liquefy coal? 3. What is the meaning of nanotechnology? 4. What is the meaning of nanotube? 5. What is the meaning of catalyst? 6. What is the meaning of nanocatalyst? 7. How can the use of nanocatalyst improve the effectiveness of the method to liquefy coal? 8. How does the use of nanotechnology interact with at least two of the following factors: social‚ economic‚ political
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the UK women constitute just over 50 per cent of the total workforce and considerable evidence has been gathered that these women are mostly in the executive level positions (Cross & Linehan‚ 2006) According to leading US research organisation Catalyst‚ there is a difference between companies that managed to take advantage of gender diversity and those companies that did not. (Robinson‚ 2008) It is therefore important that an organisation should take a closer look at the issue of gender diversity
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Part I. Saturated vs Unsaturated Compounds 1. What is the difference between a. and What is the significance of each result? Give a clear explanation for the change. in colour or lack thereof. ? The bromine test with cyclohexane compound did not result in any changes in color as it reacts with bromine slowly. This lack of decolourisation is dependent. on the compound?s nature as a saturated hydrocarbon?non-reactive towards. bromine. This establishes that the tested compound has no double bond
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College of food science &technology‚ bapatla-522101 CERTIFICATE Certified that this is a bonafide record done in B.tech(food technology) by S.CHITRA SAI‚ BF-09-011
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kinetics is the study of the factors that affect the speed of a reaction and the mechanism by which a reaction proceeds. • experimentally it is shown that there are 4 factors that influence the speed of a reaction: nature of the reactants‚ temperature catalysts concentration • • rate of a chemical reaction is generally measured in terms of how much the concentration of a reactant decreases in a given period of time or product concentration increases for reactants‚ a negative sign is placed in front of the
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properties of DME are similar to those of LPG and it can be used for various fields; power generation fuel‚ transportation fuel‚ home fuel‚ etc. An innovative process of direct synthesis of DME from synthesis gas has been developed. Newly developed catalyst in a slurry phase reactor gave a high conversion and high selectivity of DME. Pilot scale plant (5 tons/day) testing has been successfully carried out since 1999 with the Japanese government support. A feasibility study of DME Fuel System‚ which
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