Mechanics, Materials Science & Engineering, July 2017 – ISSN 2412-5954
Growth and Characterization of Potassium Di Chromate Doped L-Alanine Crystal 1 D. Prasanna1, N.Karthikeyan2, Dr. P. Elangovan 1 1 – PG & Research Department of Physics, Pachaiyappa’s College, Chennai, Tamil Nadu, India 2 – Department of Physics, Prist University, Thanjavur, India DOI 10.2412/mmse.28.63.937 provided by Seo4U.link
Keywords: L-alanine, amino acid, potassium, single crystal.
ABSTRACT. L-alanine is a neutral, genetically coded amino acid. Single crystals of L-alanine have been grown from buffered aqueous solutions and characterized as to their optical quality via waveforms distortion analysis, electro optical response and harmonic generation efficiency. L-alanine was first crystallized by BERNAL and later by SIMPSON et al. DESTRO et al. who refined the structure. By using slow evaporation method to prepare seed crystal and the preparation methods, properties and characteristic reactions of amino acids were discussed. A brief study of L-lysine monohydrochloride has been made. And various properties and uses of L-alanine have been studied.
Introduction. Crystals are ordered arrangements of atoms (or molecules). A material in crystalline form has special optical and electrical properties, in many cases improved properties over materials with randomly arranged atoms or molecules (also said to be amorphous or glassy). Crystal growth is a controlled phase transformation to solid phase, either from solid or liquid or gaseous phase. The growth units, namely the atoms, or molecules, diffuse to the growth site from the mother phase, when given sufficient time to get orderly arranged on the lattice Since crystal growth has a vital and fundamental part of materials science and engineering, crystals of suitable size and perfection are required for fundamental data acquisition and for practical devices such as detectors, integrated circuits and for other millions and millions of applications. Experimental Synthesis of L-Alanine. Potassium phthalimide reacts with l-bromo-l-methyl propyl ester which gives an esterified phthalimide. Then hydrolysis takes place formine an acid. For release of amino acid, aqueous HCl is added. Thus, the acid is released forming L-alanine (P. Chattopadhyay).
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