In physics,<unk> is a procedure for constructing a quantum field theory starting from a classical field theory. This is a generalization of the procedure for building quantum mechanics from classical mechanics. One also speaks of field<unk>  as in the<unk> of the electromagnetic field", where one refers to photons as field "quanta" (for instance as light quanta). This procedure is basic to theories of particle physics, nuclear physics, condensed matter physics, and quantum optics.
Quantization 
Isotope separation
Mixture
Titration
Staining
Measurement
Amplification 
Equation of state