cata-, cat-, cath-, kata-
(Greek: down, downward; under, lower; against; entirely, in accordance with, completely; definitely)
2. The point or surface in contact with the negative pole; in electro-metallurgy the object to be electro-plated.
3. A negatively charged electrode, as of an electrolytic cell, a storage battery, or an electron tube.
4. The positively charged terminal of a primary cell or a storage battery that is supplying current.
5. Etymology: from Greek kathodos, "descent" (kat-, kata-, cata-) + hodos, "way, path".
2. A branch of optics involved with the formation of images by speculums or polished metals: Dr. Tweedie, the physics professor, lectured about catoptrics which involved how images are produced by curved-suface mirrors.
2. The acceleration of a chemical reaction in the region of an electrode.
3. Breaking down a substance with electric stimulation.
4. Catalysis or chemical changes produced by the action of electricity.
2. A method of separating substances, especially proteins, and analyzing molecular structure based on the rate of movement of each component in a colloidal suspension while under the influence of an electric field.
Electrophoretic methods are useful in the analysis of protein mixtures because protein particles move with different velocities depending principally on the number of charges carried by the particles.3. The movement of charged suspended particles through a liquid medium in response to changes in an electric field.
Charged particles of a given substance migrate in a predictable direction and at a characteristic speed.
The pattern of migration can be recorded in bands on an electrophoretogram.
This technique is extensively used to separate and to identify serum proteins and other substances.
2. Relating to the breakdown (catabolism) of fat.