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 ?
Stanclere TL dibutyltin dilaurate provides better hydrolytic stability than stannous catalysts in premixes containing polyol, water, and silicone, giving the premix a longer storage life.
Though easy to employ, the sugary catalyst converted only 20 percent of the starting material into biodiesel fuel.
II-16 KataLeuna GmbH Launches New Range of Hydrogenation Catalysts II-16 Apyron Technologies Develops a New Catalyst for Producing Methanol from Synthesis Gas II-16 ICI's Synetix Catalyst Division Jointly Develops Immobilized Catalysts with Rhodia Chirex II-16 Degussa Catalysts Launches New Range of Heterogeneous Catalysts II-17 Zimmer AG Introduces Heavy Metal Free Catalyst for Commercial Use II-17 CalTech Team Develops Nickel-Based Catalysts II-17 Sumitomo Chemical Introduces Ziegler-Natta Catalysts II-17
Product Overview II-13 Refining II-13 Catalyst Defined II-13 Types of Catalysts II-13 The Need for Catalysts .
The ability to design the structure of these catalysts and the flexibility in the catalyst molecule allows the polymerization of many monomers which cannot be produced using Zeigler-Natta catalysts on a commercial scale.
No one has reached that level of selectivity before with a heterogeneous asymmetric catalyst.
Shelnutt's team will continue working toward catalysts that might make something useful out of some of the uncontrolled carbon dioxide that poses a serious threat of global warning.
While metallocene catalysts are very versatile, the new non-metallocene single-site catalysts provide several advantages.
x controls for boilers, Grace -- a leading catalyst manufacturer -- decided to investigate ways to make SCR technology more economical.
Dabco NEM, NMM and NCM, morpholine-based catalysts, and Dabco B-l6 catalyst for polyester slabstock foam.
for the Redwood Coast Regional Center, announced that Community Catalysts of California has been selected to provide services to the residents of Seneca Estates, a licensed adult residential facility providing a supportive living environment.
Dabco 33-LV and BL-1i tertiary amine catalysts for flexible slabstock and flexible molded systems provide precise control of gelling and blowing.