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 ?
9, 2015 /PRNewswire-iReach/ -- The report titled "Global Refinery Catalyst Market: Trends and Opportunities (2015-2019)" analyzes the potential opportunities, challenges, demand drivers and significant trends representing the Global Refinery Catalyst market.
Regulatory Norms Make Emission Control Catalysts a Necessity Rather than an Option in Vehicles
Dabco NEM, NMM and NCM, morpholine-based catalysts, and Dabco B- 16 catalyst for polyester slabstock foam.
The researchers recovered the prototype catalyst by simply decanting the biodiesel, they report in the Nov.
Demand for Ziegler/Natta polymerization catalysts is projected to increase 5.
Product Overview II-3 Definition of Catalyst II-3 Types of Catalysts II-3 The Exogenous Initiators II-3 Types of Chemical Processing Catalysts II-4 Polymerization Catalysts- The Leading Catalyst Segment II-4 Metallocene Catalysts II-4 Used to Manufacture a Vast Range of Polymers II-4 Metallocene & SSC: Pinnacles In Polymer Technology II-5 Late Transition-Metal Catalysts: Slowly Eating into The Metallocene Pie II-5 Oxidation Catalysts II-5 Organic Synthesis Catalysts II-6 Synthesis Gas Catalysts II-6 Hydrogenation Catalysts II-6 Dehydrogenation Catalysts II-7 Biocatalysts II-7 Eco-Friendly is in II-7
So far, the researchers have tested the catalyst only on one type of chemical reaction, but they plan to apply the catalyst to other types of reactions.
One proprietary subset of metallocene catalysts has become known as constrained geometry catalysts.
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
The catalyst is also asymmetric, says Wan: It facilitates the making of either a left-handed or a right-handed version of a specific molecule.
DMP (N,N-dimethylpiperazinc) general-purpose catalyst for flexible and semi-flexible polyether foam.
reported a major milestone along the road to such materials: the ability to predict reliabily the precise, three-dimensional shape of theoretical and potentially desirable biologically inspired catalysts.