9 Laboratory instruments and apparatus for protein and nucleic acid electrophoresis; Scientific, electrical, optical, measuring, laboratory and test apparatus and instruments and parts therefore, namely, mass spectrometers, optical emission spectrometers, spectroscopy apparatus, spectrophotometers, gas and liquid chromatography apparatus, chromatography columns, centrifuges, incubators, biological safety cabinets, fluorometers, assay diagnostic slides, electrophoresis analyzers, coolers and chillers, laboratory freezers, laboratory sample concentrators, electromechanical shakers, dispensers, microplate instruments, laboratory ovens, gas detectors, radiation detectors, process gas analyzers, aerosol monitors, x-ray apparatus for inspecting liquids in containers, neutron generators, x-ray apparatus sources for scientific laboratory uses and for the measurement of weights and thicknesses of industrial articles, flow meters, sulfur analyzers, on-line cement, coal and minerals analyzers, electromagnetic interference simulators for testing electronic device, robotic liquid handling systems, viscometers and rheometers, coating gauges, density meters, pipettes, belt scales, check-weighers, metal detectors, PH electrodes, conductivity meters, dissolved oxygen meters, laboratory mixers and extruders, computer software for use in data acquisition, analysis, and archiving in the field of laboratory research, computer software for use in laboratory instrument operation, charge-injection-device cameras, microscope slides and cover glasses for microscope slides, laboratory equipment for use in specimen preparation, namely, tissue processors; medical test kits comprised of analysis or calibration equipment to analyze and detect drugs and toxins and other chemicals in bodily fluids and tissues for clinical laboratory use; laboratory apparatus, namely, centrifuges