They may be radioactive

Usage examples of isotopes.

The isotopes arc pumped up through lead-shielded pipes to a radiochemistry laboratory in which complex syntheses are done in automated equipment designed to produce pure labelled organic chemicals from the fast-decaying isotopes within a few moments of arrival.

Apparently such a use of stabilized isotopes had never occurred to the Corviki.

A lot of my own time is taken up with money, an almost obsessive issue for most British-based researchers these days: how to find the funds for the salaries of the post-docs, the grants to the students, the capital costs of new equipment, the consumable budget to buy the isotopes and the reagents.

PyrE is a solid solution of transplutonian isotopes, releasing thermonuclear energy on the order of stellar Phoenix action.

Certain isotopes lost radioactivity very rapidly, in a matter of hours or minutes.

Oppy and Groves droned on about problems of the isolation of isotopes and allotropic states of plutonium, Joe wondered why he had gone to bed with Mrs Augustino.

A blast smudge showed on the desert floor where a practice blast, a mere 100 tons of TNT spiced with isotopes, had been set off on V-E Day.

You never gave me any restrictions to observe in entertaining the Hokas, so this mess tonight is your fault, and it was Miss Hostrup and I who pulled your isotopes out of the pile.