204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
* | DD | PROCESSES AND PRODUCTS {7} |
450 | DF | .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14} |
549 | .~.~ Isotachophoresis (i.e., displacement electrophoresis) or measurement of ion or particle mobility |