]> artefact_object material entity _defined_material device instrument Elizabeth M. Goralczyk John Quinn Olga Tchuvatkina DS: this is a role I guess, not an instrument. Practical Flow Cytometry 4th Edition, Howard Shapiro, ISBN-10: 0471411256, ISBN-13: 978-0471411253 light_source A light source is an optical subsystem that provides light for use in a distant area using a delivery system (e.g., fiberoptics). Light sources may include one of a variety of lamps (e.g., xenon, halogen, mercury). Most light sources are operated from line power, but some may be powered from batteries. They are mostly used in endoscopic, microscopic, and other examination and/or in surgical procedures. The light source is part of the optical subsystem. In a flow cytometer the light source directs high intensity light at particles at the interogation point. The light source in a flow cytometer is usually a laser. light_source optical_subsystem entity continuant independent_continuant definition editor editor note definition source curation status preferred term definition relates a class to a property where instances of the class make sense as subjects of the property relates a class to a property where instances of the class make sense as objects of the property relates a class to a property where some instances of the class may make sense as subjects of the property relates a class to a property where some instances of the class may make sense as objects of the property has_input is_input_of has_quality has_output outputs_data is_manufactured_by has_function is_reagent_in utilizes_reagent is_instrument_for is_output_of utilizes_instrument is_proxy_for inputs_data has_role adjacent_to agent_in contained_in contains derived_into derives_from has_agent has_integral_part has_part has_participant has_proper_part integral_part_of located_in location_of part_of participates_in proper_part_of relationship transformation_of metadata incomplete