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Catalysis - Dictionary Definition and Overview |
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Catalysis : (noun)
1: acceleration of a chemical reaction induced the presence of
material that is chemically unchanged at the end of the
reaction; "of the top 50 commodity chemicals, 30 are
created directly by catalysis and another 6 are made from
raw materials that are catalytically produced" [syn: contact
action]
Based on WordNet 2.0
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Catalysis : \Ca*tal"y*sis\, n.; pl. Catalyse.[ML., fr. Gr. ?
dissolution, fr. ? to destroy, dissolve; kata` down, wholly _
? to loose.]
1. Dissolution; degeneration; decay. [R.]
Sad catalysis and declension of piety. --Evelyn.
2. (Chem.)
(a) A process by which reaction occurs in the presence of
certain agents which were formerly believed to exert
an influence by mere contact. It is now believed that
such reactions are attended with the formation of an
intermediate compound or compounds, so that by
alternate composition and decomposition the agent is
apparenty left unchanged; as, the catalysis of making
ether from alcohol by means of sulphuric acid; or
catalysis in the action of soluble ferments (as
diastase, or ptyalin) on starch.
(b) The catalytic force.
Based on Webster's Revised Unabridged Dictionary
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Catalysis : Catalysis: The process by which a substance speeds up a chemical reaction without being consumed or altered in the process. Substances that can accomplish this remarkable feat are termed
catalysts and are of immense importance in chemistry and biology.
All glucose , doing in minutes what would otherwise take weeks.
The word "catalyst" was introduced into science by the great Swedish chemist Jons Jakob Berzelius (1779-1848) who also determined the atomic and molecular weights of thousands of substances,
discovered several elements including selenium , first isolated silicon and titanium, and created the present system of writing chemical symbols and reactions.
Based on Webster's Revised Unabridged Dictionary (1913)
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Example Usage of Catalysis |
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