SEARCH Articles Figures Tables First-principles calculations, solid-state Liquid-solid flotation principles Liquid-solid phase-contacting principles Matrix solid phase dispersion principle Physical Principles and Methods of Single-Molecule Spectroscopy in Solids Principles of Solid State Sintering Principles of Solid-State Biological Inorganic Chemistry Principles of Solid-State NMR Spectroscopy Separation principles for the various solid phases Solid oxide fuel cells operating principle Solid phase extraction principles Solid phase principle Solid principle Solid principle Solid utility principle Solid) principle states Solid-phase microextraction principles Solid-state NMR spectroscopy principles Solids, mixing principles The Principle of Solid Phase Extraction