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A protein that acts as a catalyst in biological systems.

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Free Energy, Gibbs Free Energy

The thermodynamic state function of a system that indicates the amount of energy available for the system to do useful work at constant T and P.

Lewis Acid

Any species that can accept a share in an electron pair.

Natural Radioactivity

Spontaneous decomposition of an atom.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Polymorphous

Refers to substances that crystallize in more than one crystalline arrangement.

Carbonium ion

An orgainic ion carrying a positive charge on a carbon atom.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

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Carbanion

An organic ion carrying a negative charge on a carbon atom.