{"thcode":2,"term":{"code":327,"name":"electron microscopy","parent":740,"scope":"Study of small particles of matter with a microscope that produces a magnified image by using a beam of electrons focused by magnetic lenses."},"uf":[],"bt":[{"code":740,"name":"microscopy","parent":619,"scope":"Laboratory methods using instruments that employ optical lenses or radiation to study objects too small to be seen by the naked eye."},{"code":619,"name":"laboratory methods","parent":734,"scope":"Techniques to analyze and test samples in a place equipped and designed for the work."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1014,"name":"scanning electron microscopy","parent":327,"scope":"Microscope in which a finely focused beam of electrons is scanned across a specimen. The electronic intensity variations observed are used to construct an image of the specimen."}],"rt":[]}