* 9/4/12 12.3 - crystal structures crystalline structure: possess rigid and long-range order; its atoms‚ molecules‚ or ions occupy specific positions (Exs. wax ‚ice‚ sugar‚ salt‚ diamond‚ etc.) unit cell: basic repeating structural unit of crystalline solid -there are seven types of unit cells coordination number: number of atoms surrounding an atom in a crystal lattice -higher coordination number --> more tightly packed structure 3 types of cubic unit cells: -primitive cubic (sc) c#:
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product is also used in leather processing industry‚ paper‚ pulp and board industry‚ photographic industry‚ bleaching and reducing agents. This product is also a component of decolorisation agents. In macromolecule material industry‚ it is used as catalysis agent and stabilizer of resinic producing‚ and it is also used in organic synthesization of sensitizing material‚ and medicine‚ medical‚ spicery materials in fine chemicals‚ and also can be applied in the recycling and separating of heavy metals
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from phenol is also covered‚ as is the Asahi process for cyclohexanol production from benzene via cyclohexene. Appropriately adjusted nitric acid oxidation is appended to each of these processes. Solutia‚ working with the Boreskov Institute of Catalysis (BIC) in Russia‚ has developed a one step process to manufacture phenol from benzene‚ using nitrous oxide for the oxidation step. Thus‚ by coupling phenol production and adipic acid production‚ Solutia has no net production of nitrous oxide and
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Effects of Enzyme Catalysis of H2O2 by Catalase Report by: Timmy Lin (#269164729) October 17‚ 2011 Mr. Rienzi AP Biology Problem: Measuring the effects of Catalase enzymes on hydrogen peroxide decomposition. Measuring the rate of the reaction when hydrogen peroxide and Catalase are mixed at the same ratio for different time (10‚ 20 30 60 120 180 360 seconds). Background: Enzymes are biological catalysts that carry out cellular metabolic processes with the ability to enhance the rate
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ABSTRACT: This lab allows us to observe the conversion of hydrogen peroxide (H2O2) into water and oxygen gas. An enzyme known as catalase facilitates this decomposition reaction. The catalase enzyme acts as catalysis‚ helping lower the energy needed to activate the reaction while the enzyme itself is not affected. Catalase is a digestive enzyme used to break down hydrogen peroxide‚ which is a normal byproduct of cellular respiration. The reaction could take place without the help of catalase‚ but
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a petroleum refinery is that sulfur‚ even in extremely low concentrations‚ poisons the noble metal catalysts platinum and rhenium in the catalytic reforming units that are subsequently used to upgrade the of the naphtha streams . Most metals in catalysis HDS is those at the middle of the transition metal series that are most active. Ruthenium disulfide appears to be the single most active catalyst‚ but binary combinations of cobalt and molybdenum are also highly active. Aside from the basic cobalt-modified
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to test the mitochondria under the presence of malonate because from research we discovered that malonate is the specific inhibitor for succinate dehydrogenase (C. A. Baumann and F. J. Stare). The inhibitor in this case will slow down or stop the catalysis action of the SDH enzyme causing the cuvette tubes to become more colorless. Hypothesis: Since unexpectedly our P3 had the greatest amount of SDH activity‚ which corresponds to greatest amount of mitochondria in a cell fraction‚ we used this in
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Chemistry Exam 2 Notes/Outline Exam Chapters and Topics: 13.1-13.2 Reaction Rates 13.3-13.4 Integrated Rate Law 13.4-13.6 Effect of Temperature‚ Catalysts‚ Reaction Mechanisms II 21.1-21.2 Radioactive Particles‚ Rates of Decay 14.1-14.2 Introduction to Equilibrium‚ Reaction Quotient 14.3 LeChatelier’s Principle 14.4-14.5 Equilibrium Calculations Chapter 13 I. Reaction Rates Chemical Kinetics: The study of the rates of chemical reactions These reactions occurs when a reactant species
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membrane reactor.(2007) 8. Lachheb‚ H.‚Puzenat‚ E.‚ Houas‚ A. and Herrmann‚ J.‚ Photocatalytic degradation of various types of dyes( Alizarin S‚ Crocein Orange G‚ Methyl Red‚ Congo Red‚ Methylene Blue) in water by UV-irradiated titania. Applied Catalysis B: Environmental(39)‚ 75-90‚ (2002)
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Structural Effects on Stability and Reactivity. Organic Chemstry Laboratory Structural Effects on Stability and Reactivity Introduction The concepts of stability and reactivity are fundamental to understanding chemistry. In this chapter we consider first the thermodynamic definition of chemical stability. We then consider chemical kinetics (Section 3.2) and how it can provide information about reactivity. We also explore how structure influences stability and reactivity. We want to learn how
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