Administration of the total dose of radiation (RADIATION DOSAGE) in parts, at timed intervals.
The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.
Separation of a mixture in successive stages, each stage removing from the mixture some proportion of one of the substances, for example by differential solubility in water-solvent mixtures. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Techniques to partition various components of the cell into SUBCELLULAR FRACTIONS.