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Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

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Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Exothermic

Describes processes that release heat energy.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Isomers

Different substances that have the same formula.

Diamonds Are Forever

Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?

Chemical Bonds

The attractive forces that hold atoms together in elements or compounds.

Doublet

Two peaks or bands of about equal intensity appearing close together on a spectrogram.

Alloying

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