Technique Biological chemistry 18 Microbiology 17 Chemistry, Analytic 10 Electron microscopy 7 Analysis 6 Biochemistry 6 Microscope and microscopy 6 Enzymes 5 Food 5 Biotechnology 4 Extraction (Chemistry) 4 Food contamination 4 Microscopy 4 Spectrum analysis 4 Biology 3 Chemistry, Organic 3 Chromatographic analysis 3 Diffraction 3 Electrophoresis 3 Experiments 3 Immunochemistry 3 Proteins 3 Autoradiography 2 Biomolecules 2 Chemistry, Clinical 2 Collected works 2 Crystallography 2 Cytology 2 DNA fingerprints 2