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.
A collision or crash is an event in which two or more bodies exert forces on each other for a relatively short time. Although the most common colloquial use of the word collision refers to incidents in which two or more objects collide, the scientific use of the word collision implies nothing about the magnitude of the force.