catalysis

(redirected from Catalytic activity)
Also found in: Dictionary, Thesaurus, Encyclopedia.

catalysis

 [kah-tal´ĭ-sis]
increase in the velocity of a chemical reaction or process produced by the presence of a substance that is not consumed in the net chemical reaction or process; negative catalysis denotes the slowing down or inhibition of a reaction or process by the presence of such a substance. adj., adj catalyt´ic.

ca·tal·y·sis

(kă-tal'i-sis),
The effect that a catalyst exerts on a chemical reaction.
[G. katalysis, dissolution]

catalysis

/ca·tal·y·sis/ (kah-tal´ĭ-sis) increase in the velocity of a chemical reaction or process produced by the presence of a substance that is not consumed in the net chemical reaction or process; negative c. denotes the slowing down or inhibition of a reaction or process by the presence of such a substance.catalyt´ic

catalysis

[kətal′əsis]
Etymology: Gk, katalein, to dissolve
an increase in the rate of a chemical reaction that is caused by a substance that is neither permanently altered nor consumed by the reaction. Compare negative catalysis.See also catalyst. catalytic. adj., catalyze, v.

ca·tal·y·sis

(kă-tal'i-sis)
The effect that a catalyst exerts on a chemical reaction.
[G. katalysis, dissolution]

ca·tal·y·sis

(kă-tal'i-sis)
The effect that a catalyst exerts on a chemical reaction.
[G. katalysis, dissolution]

catalysis (kətal´əsis),

n the increase in rate of a chemical reaction, induced by a substance called a
catalyst, which takes no part in the reaction and remains unchanged.

catalysis

increase in the velocity of a chemical reaction or process produced by the presence of a substance that is not consumed in the net chemical reaction or process; negative catalysis denotes the slowing down or inhibition of a reaction or process by the presence of such a substance.

covalent catalysis
one type of enzyme reaction with substrates to form very unstable, covalently joined enzyme-substrate complexes which undergo further reaction.
References in periodicals archive ?
The atomic ratios H/M obtained by H2 chemisorption for all catalysts, suggests an order particle size: PtCl/C < PdCl /C < PdN /C, which is closely related to the catalytic activity results.
From the figure it is clear that the catalytic activity increased with prolonged the immobilization time and the maximum value was obtained under immobilization allowed to proceeding for 5h.
The catalytic activity revealed by samples of natural alumosilicates depends most likely on content of the porous component as zeolite one.
4] loading on the catalytic activity of the unmodified zeolite P(wt.
deposited very small 3-10 nm sized AuNPs on metal oxides, such as TiO2, Fe2O3, Co3O4 and NiO, which displayed surprisingly high catalytic activity for CO oxidation at low temperature (-70 0C) [24].
4] prepared Pt-modified PANI on carbon electrodes by electrochemical deposition and studied catalytic activity for methanol electro-oxidation.
Gold exhibits catalytic activity but its use as catalyst is very recent compared to the other metals such as metals those belonging to VIII and IB group (Cu, Ag) of the periodic table [8].
The term "RNA World" refers to a hypothetical time in the evolution of life on earth in which catalytic RNA was the sole genetic material and in which the standard Watson-Crick pairing was the basis of genetic manipulation; a hypothesis that has been given a new lease on life due to the recent discovery of present-day RNA molecules that do indeed display catalytic activity.
The nanocomposite has been characterized by various techniques, and we also investigate its catalytic activity in detail by taking the reduction of p-nitrophenol as a model reaction.