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A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

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Galvanizing

Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.

 

Ideal Gas Law

The product of pressure and the volume of an ideal gas is directly proportional to the number of moles of the gas and the absolute temperature.

Nitrogenases

A class of enzymes found in bacteria within root nodules in some plants, which catalyze reactions by which N2 molecules from the air are converted to ammonia.

 

Entropy

A thermodynamic state or property that measures the degree of disorder or randomness of a system.

A brief history of dyeing fabrics

 Dyeing fabrics is giving the fibers a homogeneous color that has a certain degree of strength. The methods of dyeing are very diverse, depending on the properties of the dyes and the dyed fibers.

Outer Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals in the outermost (occupied) shell in hybridization.

Enzyme

A protein that acts as a catalyst in biological systems.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Enthalpy

The heat content of a specific amount of substance, defined as E= PV.