catalytic activity


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catalytic activity

[¦kad·əl¦id·ik ak′tiv·əd·ē]
(chemical engineering)
The ratio of the space velocity of a catalyst being tested, to the space velocity required for a standard catalyst to give the same conversion as the catalyst under test.
References in periodicals archive ?
To study the catalytic activity of mono and bimetallic catalyst, the oxidation of toluene was carried out with hydrogen-peroxide.
It appears that particle size and the mechanism of reaction including the base employed, influences on the catalytic activity.
Figure 2 illustrates the catalytic activity of the immobilized [beta]-galactosidase prepared at different immobilization time.
The highest catalytic activity of palygorskite among the Russian and Jordanian clay minerals is explained by high content of this mineral in clay sample and the unique needle-like structure of mineral providing high surface area of catalyst and accessibility of active sites for substrate molecules.
Thus, the surface concentration of methoxonium ion, and therefore the catalytic activity for ring alkylation would depend on the density and strength of the Bronsted acid sites.
The expression and catalytic activity of neural endopeptidase (NEP) which is involved in degrading beta amyloid was also measured.
Spherical Gel-AuNPs showed excellent catalytic activity for reduction of three differently charged dyes eosin B (EB), methylene blue (MB) and rose bengal (RB) in the presence of NaBH4.
The catalyst's high level of activity was determined from a systematic experiment (hat studied the catalytic activity of 10 known compounds, including iridium oxide, which was previously the best known catalyst for hydrogen fuel production.
On the other hand, it is of great importance to investigate the catalytic activity of low loading platinum catalysts and to determine the lowest metal loading necessary to reach the practical performances in terms of current density and power density because of relatively high cost of catalytic material.
Thus, it is evident that the phytase is denatured during storage at RT, indicating the importance in avoiding long storage periods in order to ensure a satisfactory catalytic activity.
The in vitro induction potential of the extracts was tested in freshly isolated human hepatocytes from 3 donors as influence on the catalytic activity of five cytochrome P450 isoenzymes, namely 1A2, 2B6, 2C9, 2E1, and 3A4 on the respective marker substrates.