Three groups of drugs are used to reduce the stickiness of platelets, thus preventing platelets from clumping together to form platelet plugs. The anti-platelet drugs are most effective in preventing abnormal blood clots from forming in arteries (as opposed to veins). Aspirin and dipyridamoleâ (Aggrenox).
In order to react, colliding molecules must have a total kinetic energy equal to or greater than some minimum value [Figure 14.13(b)]. The minimum energy required to initiate a chemical reaction is called the activation energy, Ea. The value of Ea varies from reaction to reaction.
Definition - What does Activation Energy mean? Activation energy is a concept used in chemistry that was introduced by the scientist from Sweden named âSvante Arrheniusâ in 1889. Activation energy is the minimum amount of energy required by chemical reactants to undergo a chemical reaction. Activation energy is also defined as the least possible energy required to initiate a chemical reaction.