Reaction (physics) — In classical mechanics, Newton s third law states that forces occur in pairs, one called the Action and the other the Reaction ( actio et reactio in Latin). Both forces are equal in magnitude and opposite in direction. The distinction between… … Wikipedia
Diels-Alder reaction — The Diels Alder reaction is an organic chemical reaction (specifically, a cycloaddition) between a conjugated diene and a substituted alkene, commonly termed the dienophile, to form a substituted cyclohexene system. [cite journal author = Diels,… … Wikipedia
acid–base reaction — ▪ chemistry Introduction a type of chemical process typified by the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O; or acetic acid, CH3CO2H) or electrically charged (ions, such… … Universalium
Diels–Alder reaction — Named after Otto Paul Hermann Diels Kurt Alder Reaction type Cycloaddition Reaction … Wikipedia
Cheletropic reaction — Pericyclic Reactions Cheletropic reactions are a type of pericyclic reaction. A pericyclic reaction is one that involves a transition state with a cyclic array of atoms and an associated cyclic array of interacting orbitals. A reorganization of σ … Wikipedia
Proton–proton chain reaction — The proton–proton chain reaction dominates in stars the size of the Sun or smaller. The proton–proton chain reaction is one of several fusion reactions by which stars convert hydrogen to helium, the primary alternative being the CNO cycle. The… … Wikipedia
International reaction to Fitna — The International reaction to Fitna consisted of condemnation within the international community, several fatawā against Geert Wilders, and attempts by many Islamic countries to censor the film. The Dutch government immediately distanced itself… … Wikipedia
Foreign reaction to the Reconciliation, Tolerance, and Unity Bill (Fiji) — The controversial Reconciliation, Tolerance, and Unity Bill being promoted by the Fijian government throughout 2005 has generated enormous debate, both locally and internationally. The legislation aims to establish a Commission empowered to… … Wikipedia
Contemporary reaction to Ignaz Semmelweis — Dr. Ignaz Semmelweis discovered in 1847 that hand washing with a solution of chlorinated lime reduced the incidence of fatal childbed fever tenfold in maternity institutions. However, the reaction of his contemporaries was not positive; his… … Wikipedia
Goethe, Johann Wolfgang von — born Aug. 28, 1749, Frankfurt am Main died March 22, 1832, Weimar, Saxe Weimar German poet, novelist, playwright, and natural philosopher. In 1773 Goethe provided the Sturm und Drang movement with its first major drama, Götz von Berlichingen, and … Universalium