Because solid food takes more time to digest and to break down the protein and send it to the muscles, it can be best to take a protein shake immediately following a workout, since protein shakes only take about 30 minutes to reach the muscle after ingestion.
selectivity. (analytical chemistry). The ability of a type of method or instrumentation to respond to a specified substance or constituent and not to others. (electronics). The ability of a radio receiver to separate a desired signal frequency from other signal frequencies, some of which may differ only slightly from the desired value.
1 Electrical conductivity, a measure of a material's ability to conduct an electric current.  Conductivity (electrolytic), also the specific conductance, is a measurement of the electrical conductance per unit distance in an electrolytic or aqueous solution.