organic catalyst
31Payen, Anselme — ▪ French chemist born Jan. 6, 1795, Paris, France died May 12, 1871, Paris French chemist who made important contributions to industrial chemistry and discovered cellulose, a basic constituent of plant cells. Payen, the son of an… …
32Ribozyme — An RNA molecule that can catalyze its own chemical reactions. * * * A nonprotein biocatalyst; several cleave precursors of tRNA to yield functional tRNAs; others act on rRNA; plays a key role in intron splicing events. SYN: organic catalyst (1),… …
33enzyme — n. organic catalyst, especially digestive. ♦ enzymatic, enzymic, a …
34en|zyme — «EHN zym, zihm», noun. a protein substance produced in living cells, that influences a chemical reaction within a plant or animal without being changed itself; an organic catalyst. Enzymes help break down food so that it can be digested. Pepsin… …
35Catalysis — Catalyst redirects here. For other uses, see Catalyst (disambiguation). Solid heterogeneous catalysts such as in automobile catalytic converters are plated on structures designed to maximize their surface area …
36Ethylene oxide — Oxirane redirects here. For oxiranes as a class of molecules, see epoxide. Ethylene oxide …
37Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
38Pyridine — Pyridine …
39Phase Boundary Catalysis — (PBC) in chemistry is a type of heterogeneous catalytic system which facilitates the chemical reaction of a particular chemical component in immiscible phase react on a catalytic active site located at phase boundary. The chemical component is… …
40Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
