X-ray diffraction procedure

Modern methods of amino-acid and peptide analysis, have enabled the complete amino-acid sequence of a number of proteins to be worked out. The grosser structure can be determined by X-ray diffraction procedures. Proteins have molecular weights ranging from about 6 000 000 to 5 000 (although the dividing line between a protein and a peptide is ill defined). Edible proteins can be produced from petroleum and nutrients under fermentation. 

H. P. Klug and L. E. Alexander, X-ray Diffraction Procedures, John Wiley and Sons, New York, 1954. 

Klug, H. P. Alexander, L. E. "X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials " Wlley-Interscience, 1974 pp 634-642. 

Klug HP, Alexander LE (1974) X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials. 2nd edn., John Wiley Sons, New York... 

Klug, H.P. Alexander, L.E. (1974) X-ray diffraction procedures for polycrystalline and amorphous materials. J. Wiley Sons, New York, 966 p. 

In considering the three most prominent analytical techniques for quartz, i.e. colorimetric, infrared (IR) and x-ray diffraction, it was possible to immediately exclude the x-ray diffraction procedure for use because the instrument was not available and the cost of purchasing such a unit was considered to be prohibitive in view of the relatively small number of samples anticipated. The Talvite (1) colorimetric procedure has previously been employed without particular success. This method was generally considered to be unacceptably tedious, time-consuming and of questionable accuracy. For these reasons and because the infrared instrumentation was available, it was decided to focus our preliminary efforts on the development of an infrared procedure. 

H. P. King andL. E. Alexander, X-Ray Diffraction Procedures , 2nd edition, John Whey Sons, New York, 1974, A very comprehensive treatment. X-ray powder methods including linebroadening analysis, texture determination, stress measurement and studies of amorphous materials. 

Klug, H. P. and Alexander, L. E. (1974). X-ray diffraction procedures for polycrys-talline and amorphous materials. John Wiley Sons, New York. [117, 253, 254] Knudsen, B. 1. (1966). Copper phthalocyanine. Infrared absorption spectra of polymorphic modifications. Acta Chem. Scand., 20, 1344-50. 

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