"Crystallography" Essays and Research Papers

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    X-Ray Crystallography

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    ionic molecules to biomolecules. The technique can also be used to determine the degree of crystallinity of a sample. Due to increased data and knowledge‚ identification of compounds can now be performed using x-ray diffraction data. X-ray crystallography uses the physical phenomenon of diffraction of electromagnetic radiation. Diffraction occurs when light passes through a slit with size comparable to its wavelength. When the light passes through the slit it is spread out. When several slits

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    Lysozyme Crystallization

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    References: 1. Wlodawer A.‚ Minor W.‚ Dauter Z.‚ Jaskolski M. (2013). Protein crystallography for aspiring crystallographers or how to avoid pitfalls and traps in macromolecular structure determination. FEBS J 280: 5705–5736. 2. Höltje JV. Lysozyme substrates. EXS. 1996;75:105–110. 3. Forsythe‚ E. L.‚ Maxwell‚ D. L. & Pusey‚ M. (2002)

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    Water Expansion

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    Montessori De Manila 73 Pablo Roman Street BF Executive Village Las Pinas city “Expansion of Alkaline water‚ Tap Water and Salt Water in a Temperature of 4℃” A Research Paper in Fulfillment of the Requirements in Physics Submitted by: Dacasin‚ Gewiss Gabrielle K. Submitted to: T. Jocelyn M. Aranda CHAPTER 1 INTRODUCTION I. Title of the Study “Expansion of Alkaline water‚ Tap Water and Salt Water in a Temperature of 4℃” II. Statement of the Problem: The researcher

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    GROUP A MODEL ANSWER Brafman et al.‚ Five New Zinc Sulphide Polytypes: 10L (8 2); 14L (5 4 2 3); 24 L (5 3)3; 26L (17 4 2 3) and 28L (9 5 5 0). Acta Cryst. 22‚ 347 - 352 (1967). DO NOT PLAGIARISE THIS MODEL ANSWER Paragraph 1 ZnS exists in two polymorphs‚ namely sphalerite and wurzite. Analysis of its symmetry and crystal structure using ATOMS will be used to deduce its possible polytypic stacking sequences as well as the orientation relationship between these two structures. Sphalerite is

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    of MgSO 4.7H2O (epsomite). Acta Crystallogr. 17: 1361-1369. Cano‚ H.‚ N. Gabas and J. P. Canselier. 2001. Experimental study on the ibuprofen crystal growth morphology in solution. J. Crystal Growth 224 : 335. Dana‚ E. S. and W. E. Ford‚ 1985. Crystallography and Physical mineralogy. Wiley Eastern Limited‚ pp. 760. Dhumane‚ N. R.‚ S. S. Hussani‚ V. G. Dongre and M. D. Shirsat. 2008. Study on the effects of Glycine on the nonlinear optical (NLO) properties of Zinc (tris) Thiourea Sulfate (ZTS) single

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    Crystal Structures

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    CH1105: Materials Science Crystal Structure Assoc/Prof Timothy Tan Office: N1.2 B2-34 B2Tel: 6316 8829 E-mail: tytan@ntu.edu.sg Semester 1‚ 2013-2014 2013School of Chemical and Biomedical Engineering Why study structure of crystalline solids? To understand how atoms assemble geometrically into solid structures To describe the structure of solids To relate material properties to its structure 2 Energy and Packing Dense‚ regular packing Energy typical neighbor bond length typical

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    X Ray Defraction

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    References: Tables for Crystallography‚ Vol. C (Kluwer Academic‚ Dordrecht‚ 2004)‚ p. 554. [2] M. A. Meyer & E. Zschech‚ AMD‚ Dresden (2004). [3] J. M. E. Harper‚ C. Cabral‚ P. C. Andricacos‚ L. Gignac‚ I. C. Noyan‚ K. P. Rodbell‚ C. K.

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    Learning Log 2 Jan 2015

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    Learning Log 2: Observe‚ Connect and Reflect on Your Learning PART III – Symmetry in Crystals The most striking examples of symmetry…are crystals. Herman Weyl Study Period Focus Image Question Your Observations Week 5 Image 5 What observations can you make about these octahedra of cubic cristobalite‚ another polymorph of quartz‚ ‘frozen’ in volcanic glass? (no more than 50 words) (2 marks) What is your personal favourite gemstone and what is its space group. (around 10 words) (2 marks)

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    GROUP A MODEL ANSWER Howard et al.‚ Temperature-induced structural changes in CaCl2‚ CaBr2 and CrCl2: A synchrotron X-ray powder diffraction Phys. Rev. B 72‚ 214114 (2005). DO NOT PLAGIARISE THIS MODEL ANSWER Paragraph 1 This article concerns about 2 polymorph structures that is associated with temperature-induced structural transitions. One of the structure being studied is the orthorhombic structure‚ or sometimes referred to as the calcium chloride structure‚ that is observed before the transition

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    GROUP A MODEL ANSWER Yoshida et al.‚ Flexibility of Hydrogen Bond and Lowering of Symmetry in Proton Conductor‚ Symmetry 2012‚ 4‚ 507-516. DO NOT PLAGIARISE THIS MODEL ANSWER PLAGIARISM FROM ANY SOURCE AUTOMATICALLY LEADS TO A ZERO SCORE Paragraph 1 There are three phases whereby each has a different crystal structure at three different temperatures. At room temperature (298K)‚ Phase III is present whereby Cs3H(SeO4)2 has a crystal structure of a monoclinic with a space group of C2/m. At

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