Related by context. Frequent words. (Click for all words.) 69 magnetic resonance NMR 62 x ray crystallography 60 NMR spectroscopy 60 mass spectroscopy 59 magnetic resonance 58 hormone receptors 58 spectrometry 56 X ray crystallography 56 stable isotope 56 single photon emission 55 electron microscopy 55 X ray diffraction 55 PET imaging 55 spectroscopy 54 tomography 54 X ray fluorescence 54 transmission electron microscopy 54 positron emission tomography PET 54 neutron scattering 53 Raman spectroscopy 53 infrared spectroscopy 53 isomers 53 gold nanorods 52 zeolites 52 confocal microscopy 52 positron emission tomography 52 biological molecules 52 Nuclear Magnetic Resonance 52 optical microscopy 52 radiolabeled 52 Caenorhabditis elegans 51 biochemical 51 alpha particles 51 biomolecule 51 iron oxide nanoparticles 51 SWNTs 51 molecular 51 laboratory experiments 51 magnetic nanoparticles 51 capillary electrophoresis 51 laser ablation 51 gene expression profiles 51 nanoshells 50 transmission electron microscope 50 inductively coupled plasma 50 Fluorescence 50 ion mobility 50 ion beam 50 Positron Emission Tomography PET 50 mass spectrometry 50 biomolecular 50 spectroscopic 50 crystallography 50 Tomography 50 FRET 50 interferometry 50 voxel 49 imaging MRI 49 computerized tomography 49 gel electrophoresis 49 protein complexes 49 radionuclide 49 synchrotron radiation 49 dye molecules 49 isotopic 49 scanning tunneling microscope 49 ribozyme 49 fluorescence 49 lysozyme 49 near infrared spectroscopy 49 microarray analysis 49 electron beams 49 electron spin 49 molecular dynamics 49 stem cell differentiation 49 membrane proteins 49 myocardial perfusion 48 colloid 48 radioisotopes 48 nanoscopic 48 radioiodine 48 dispersive 48 ChIP 48 Doppler ultrasound 48 mass spectrometer 48 radioisotope 48 numerical simulations 48 optical tweezers 48 fine needle aspiration 48 computational methods 48 isotopic composition 48 gene expression profiling 48 mutagenesis 48 spectrometer 48 centrifugation 48 scanning electron microscope 48 computed tomography 48 absorbance 48 biogeochemistry 48 European Synchrotron Radiation 48 vitro experiments