Type:Term. Definitions. 1. In psychoanalysis, one of three components of the psychic apparatus in the freudian structural framework, the other two being the ego and superego. It is completely in the unconscious realm, is unorganized, is the reservoir of psychic energy or libido, and is under the influence of the primary processes.
What is an Arc Most of us are familiar with an arc. The dictionary describes an electric arc as âa luminous bridge formed in a gap between two electrodesâ. An Arc Flash occurs during a fault, or short circuit condition, which passes through this arc gap.
Determining the optimal amount of silica needed is usually the hardest and most important factor in the success of a flash chromatography. Using too little silica will result in poor separation with mixed fractions and implies a second purification; too much silica will result in very long purification time and wasting of solvent, silica and test tubes.