catalyst


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catalyst

 [kat´ah-list]
any substance that brings about catalysis.

cat·a·lyst

(kat'ă-list),
A substance that accelerates a chemical reaction but is not consumed or changed permanently thereby.
Synonym(s): catalyzer

catalyst

[kat′əlist]
Etymology: Gk, katalein, to dissolve
a substance that influences the rate of a chemical reaction without being permanently altered or consumed by the process. Most catalysts, including enzymes in living organisms, accelerate chemical reactions; negative catalysts retard such reactions. See also enzyme.

cat·a·lyst

(kat'ă-list)
A substance that accelerates a chemical reaction but is not consumed or changed permanently thereby.

catalyst

A chemical substance that promotes or accelerates a chemical reaction without itself being changed. Most biochemical catalysts are ENZYMES and almost all body chemistry depends on the catalytic action of thousands of different enzymes.

catalyst

a compound which is able to increase the speed of a reaction by lowering the ACTIVATION ENERGY needed for the reaction to start. Protein catalysts are called ENZYMES and are found in all living cells.

Catalyst

A substance that causes the next step in a pathway or reaction to occur, but is not physically changed by the process.

catalyst

agent accelerating a chemical reaction but not used up, nor permanently changed, by that reaction; most enzymes are catalysts

cat·a·lyst

(kat'ă-list)
A substance that accelerates a chemical reaction but is not consumed or changed permanently thereby.

catalyst (kat´əlist),

n a substance that induces an increased rate of a chemical reaction without entering into the reaction or being changed by the reaction.

catalyst

any substance that brings about catalysis.

Patient discussion about catalyst

Q. Does alcohol drinking act as a catalyst of a problem? Does alcohol drinking act as a catalyst of a problem? My father has been battling depression and anxiety for many years and he used to drink in the past. Recently his behavior associated with drinking is visible and I strongly suspect that he is drinking again. Generally we get silly after drinking but my dad`s perception are altered in a negative way….

A. Yes that’s true… when I drink my depression gets amplified. And this almost happens on the issues which hurts me. Sometimes it becomes self destructive. One should even look that it doesn’t harm anyone. Keep him under observation for 3 days and if the problem persists, then you must take him to a doctor.

More discussions about catalyst
References in periodicals archive ?
Jeffcat M-75 low-odor catalyst used chiefly for polyester slabstock.
Jeffcat DPA low-odor catalyst contains reactive hydroxyl groups; primarily for low-density packaging foams.
Starting with one mill, Catalyst ranked its assets in terms of risk to the business.
While the overall level of reactive maintenance across the mill has not changed dramatically, Catalyst has implemented a proactive approach on these first four systems.
The Catalyst group, which provides medical and support services for people with AIDS and HIV, had been doing presentations at high schools since 1992.
Table 1: World Recent Past, Current & Future Analysis for Chemical Processing Catalysts by Geographic Region - US, Canada, Japan, Europe, Asia-Pacific (excluding Japan), Middle East and Latin America Markets Independently Analyzed with Annual Sales Figures in US$ Million for Years 2000 through 2010 (includes corresponding Graph/Chart) II-24
Table 2: World Long-term Projections for Chemical Processing Catalysts by Geographic Region - US, Canada, Japan, Europe, Asia-Pacific (excluding Japan), Middle East and Latin America Markets Independently Analyzed with Annual Sales Figures in US$ Million for Years 2011 through 2015 (includes corresponding Graph/Chart) II-25
Segment-Wise Analysis II-9 Petroleum Refining Catalysts II-9 Major Segments II-9 Fluid Cracking Catalysts II-9 Hydro Processing Catalysts II-10 Hydro Treating Catalysts II-10 Hydro Cracking Catalysts II-11 Alkylation Catalysts II-11 Other Petroleum Refining Catalysts II-11
Commonly Used Catalysts II-20 Precious Metals II-20 Inertness - An Important Virtue II-20 Challenge of Surface Area.
Zeigler-Natta catalyst systems can be single site or multiple site.
When added in this form to a chemical reaction, the catalyst promotes the making of one enantiomer, yet remains a solid, Wan says.
As far as I know, we're the only people who are using molecular modeling to design catalysts with pockets that fit given target molecules.