Other blood tests which may be done include: 1  Blood clotting tests. The liver makes many of the proteins needed to make blood clot. 2  Gamma-glutamyltransferase (GGT, or 'gamma GT'). This is another enzyme that occurs in liver cells. 3  Immunology. Blood tests may be done to detect: Viruses and antibodies to viruses.
Definition [edit]. In the study of economics and market competition, collusion takes place within an industry when rival companies cooperate for their mutual benefit. Collusion most often takes place within the market structure of oligopoly, where the decision of a few firms to collude can significantly impact the market as a whole. Cartels are a special case of explicit collusion.
Collision theory. Collision theory, theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another. Not all collisions, however, bring about chemical change.