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Keywords:
Reactant,
Unchanged,
Reaction,
Accelerate,
Undergo
a substance that initiates or accelerates a chemical reaction without itself being affected; as, thousands of enzymes serve in concert as calaysts to produce the sequence of reactions we call "life"; the industrial production of cheap ammonia depended on finding a good catalyst.
something or someone that causes events to happen with itself being changed.
A substance which accelerates a chemical reaction without itself taking part in the reaction. Example: alkylation will not take place unless some substance such as sulphuric acid is present; such a substance is called a catalyst.
A chemical additive that decreases the time of a chemical reaction with out being affected by the reaction.
a substance which speeds up a chemical reaction. The catalyst is unchanged at the end of the reaction.
A substance that effects a chemical reaction and/or the rate at which a chemical reaction takes place. In roofing, catalysts are used in SPF roofing.
A material which promotes the rate of a chemical reaction and which may be involved in the reaction itself. However, at the end of the reaction it is essentally unchanged.
Any substance of which a fractional percentage notably affects the rate of a chemical reaction without itself being consumed or undergoing a chemical change. Most catalysts accelerate reactions.
A substance that starts or speeds up a change or action.
A substance which accelerates a chemical reaction although not necessarily a part of that reaction.
A substance, usually present in small amounts, that influences the rate of a chemical reaction without being changed in the process.
a chemical substance that increases the speed of a chemical reaction without undergoing permanent change
Any material which speeds up a chemical reaction without taking part directly in the chemical changes involved.
A species that increases the rate of a reaction by providing an alternative (lower energy) pathway for the reaction to follow. It is only needed in very small concentration because it is regenerated after use (this is part of the definition of a catalyst).
substance which aids or promotes a chemical reaction without forming part of the final product. It enables the reaction to take place faster, remains unchanged at the end of the reaction and can provide control by increasing desirable reactions and decreasing undesirable reactions.
A catalyst changes the rate of a chemical reaction without being changed by the reaction itself. The periodic table
A substance that causes a chemical reaction to go faster, but is not itself changed during the reaction.
An agent which speeds up a reaction. A catalyst is not consumed in the reaction it catalyzes and so does not appear as a reactant or product in the balanced chemical equation.
A substance that increases the rate of a chemical reaction without actually undergoing any change itself.
A substance which markedly speeds up the cure of a compound by decomposing in the presence of a promoter to release an active oxygen radical. Catalyst content can vary from 0.2% to 2.0% with higher catalyst levels giving faster gel times. Examples are methyl ethyl ketone peroxide, benzoyl peroxide.
A substance responsible for an accelerated chemical reaction, which itself does not chemically change. calcine The heating of a substance, to a higher temperature, that is lower than its melting pint; resulting in loss of moisture, oxidation and the decomposition of carbonates.
A substance that retains its original chemical composition while bringing about a change in a substrate. Enzymes are catalysts in chemical reactions, and one enzyme can carry out hundreds or thousands of chemical transformations.
An agent that increases the rate of a chemical reaction, without being changed. For example chlorophyll acts as a catalyst in photosynthesis.
A substance which makes some chemical reaction happen faster, but is not itself consumed in the reaction.
A chemical compound that accelerates a chemical reaction. You can compare a catalyst with a marriage broker; in chemistry, a catalyst facilitates the marriage of (i.e. the reaction between) two chemicals.
Chemicals which are not consumed in a reaction, but, which speed up the reaction rate are called catalysts. Catalysts aid to form a transition state which is lower in energy than the transition state without the catalyst. Since the barrier to the reaction is lower, the reaction rate increases in the presence of catalysts.
A material which promotes some chemical action without itself entering into the reaction.
a substance that helps chemical reactions to occur but is not changed in the reaction
Chemically, an ingredient added to a product to provide additional performance characteristics, such as faster drying, chemical resistance, or increased hardness of the finish.
A substance that increases the rate of a chemical reaction without undergoing a permanent change in its structure. Enzymes are protein catalysts.
A substance that accelerates the rates of chemical reactions but is not itself permanently changed by the reaction.
Technically considered an initiator, catalyst is the colloquial name given to the substance added to the resin or gel coat to initiate the cure.
a substance that speeds the rate of a chemical reaction without being permanently altered in the reaction. Catalysts are effective in small quantities and are not used up in the reaction. All enzymes are catalysts; the human body has thousands of enzymes, each specific for a particular reaction.
A substance which promotes a chemical reaction, but does not itself enter into the reaction.
A Catalyst is a substance which assists a chemical reaction without taking part in it.
A substance that takes part in a chemical reaction and speeds it up, but itself undergoes no permanent chemical change.
A substance which aids or promotes a chemical reaction without forming part of the final product. It enables the reaction to take place faster or at a lower temperature, and remains unchanged at the end of the reaction.
A catalyst is a substance that accelerates a reaction without being consumed. The catalyst works by providing an alternate pathway (mechanism) for the reaction. The alternate pathway has a lower activation energy than the uncatalysed reaction. The catalyst can be thought of as a support on which two reactants are held in close proximity and in the correct orientation to react.
A chemical (metal) substance by which its mere presence accelerates, assists, retards or permits a chemical reaction but remains chemically unchanged in nature or amount at the end of the reaction.
Any component which accelerates a chemical reaction between two or more other components.
Substance that accelerates a chemical reaction without itself undergoing a change. Enzymes are protein catalysts.
A substance that reduces the activation energy of a reaction.
a substance that increases the rate of a chemical reaction without itself undergoing any change; somebody or something that makes a change happen or brings about an event.
Additives Substance generally used in small proportions, that changes the rateof a chemical reaction and itself remains chemically unchanged at the end of the reaction.
A substance that accelerates a specific chemical reaction but that is not altered by the reaction.
A substance which speeds up or slows down the rate of a chemical reaction without being used up itself.
a substance or combination of substances that speeds up a reaction without being permanently changed itself. (see heterogeneous catalyst, homogeneous catalyst)
Material added to resin to make it cure rapidly by oxidation with an accelerator as in polyester resins. This causes the heat which in turn cures the resin.
Substance which facilitates a chemical reaction.
A substance that causes or speeds a chemical reaction without itself being affected.
Substance that modifies (slows or more often quickens) a chemical reaction without being consumed in the reaction.
A substance serving as the agent in catalysis.
accelerator, curing agent
A chemical which promotes a chemical reaction without becoming part of the molecular structure of the product. In polymers, catalysts lower the temperature a which a reaction of a given rate can occur.
A hardener for resin adhesives. A reagent that accelerates a chemical reaction, with or without heat. In the case of resinous adhesives, it accelerates setting or hardening. Generally an acid, or isocyanate (initial stage of polyurethane).
a best described as a substance that brings about, or causes a reaction or occurrence without itself participating or being consumed
a chemical compound that acts to speed up a reaction, but in the process is not itself changed
a chemical compound that promotes a reaction without being consumed in the reaction
a chemical compound that takes part in a chemical reaction, and can often make the reaction proceed more quickly, but the chemical is not consumed in the chemical reaction
a chemical involved in, but not changed by, a biochemistry enzymes chemical reaction
a chemical, substance or compound that accelerates a chemical reaction
a chemical substance that changes the rates of chemical reactions without itself being used up in the process
a chemical that acts in the reaction and ends up there after the conversion has taken place
a chemical that causes a reaction between other chemicals without being affected itself
a chemical which allows a reaction to occur more quickly, without being involved in the reaction itself
a compound or element that can increase the rate of a chemical reaction
a compound that increases the rate of the reaction but does not affect the yield or equilibrium of the reaction
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