X-ray crystallography 42 X-rays 28 Crystallography 16 Physics 15 X-ray spectroscopy 15 Diffraction 9 X-rays and gamma rays; Electronics; Physics 7 Dissertations, Academic (Ph.D) 6 Thesis (Ph.D)-Physics 6 Chemistry 5 Computerized typesetting 5 X-ray diffraction 5 X-rays--Diffraction 5 Active X 4 Chemistry, Analytic 4 Cytology 4 Spectrum analysis 4 Synchrotron radiation 4 Thin films 4 X-Rays 4 Cells 3 Crystal structure 3 Crystals 3 Fluorescence spectroscopy 3 Proteins 3 Solid state physics 3 Spectroscopy 3 X-RAY DIFFRACTION 3 X-ray 3 X-ray astronomy 3