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 ?
Petroleum Industries Adopt Emission Control Catalysts in Refining Units
Cautiously Optimistic Global Economic Outlook to Help Drive Steady Gains in Emission Control Catalysts Market
AU 50 polymerized initiator, catalyst, or hardener is primarily designed for use in urethane resin systems and can be used in unsaturated polyester systems, vinyl ester resins, vinyl monomers, etc.
Jeffcat M-75 low-odor catalyst used chiefly for polyester slabstock.
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.
Catalyst established equipment health-based strategies that watched for signs of deterioration.
The decision to replace the Catalyst Foundation as the district's AIDS education provider came Wednesday night after a 1-1/2-hour debate before the Antelope Valley Union School District board.
The more than 20 speakers were split on the board's recent decision banning Catalyst from local campuses after a speaker explained methods of preventing the transmission of HIV, the virus that causes AIDS, through oral sex.
Focus on Select Players II-22 BASF Catalysts LLC (USA) II-22 Evonik Degussa GmbH (Germany) II-22 Johnson Matthey Catalysts (UK) II-22 Sud-Chemie AG (Germany) II-23 WR Grace & Co (US) II-23
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
A supported catalyst needs to be placed on a more efficient structure in order to be dispersed into the reaction medium.
INTRODUCTION, METHODOLOGY & PRODUCT DEFINITIONS Study Reliability and Reporting Limitations I-1 Disclaimers I-2 Data Interpretation & Reporting Level I-2 Quantitative Techniques & Analytics I-3 Product Definitions and Scope of Study I-3 Fluid Cracking Catalysts I-3 Hydro Treating Catalysts I-4 Hydro Cracking Catalysts I-4 Alkylation Catalysts I-4 Others I-4 Second-Stage Catalysts I-4 Hydrosulphurization Catalysts I-4