| http://www.w3.org/ns/prov#value | - Examples of such impregnating substances include a signal substance generator, a substance related to the generation of a signal substance, a substance related to the generation of a signal, an electron mediator and its stabilizing or protecting agent, a salt component for use in the adjustment of ionic strength and/or pH, a buffer solution, a liquid sample flow-smoothing agent such as a surface a
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