Optical Electrode (IMAGE)

Purdue University

Optical Electrode

Caption

Purdue University researchers use an optical electrode, or optrode, right, to measure oxygen consumption in a two-day-old fathead minnow embryo, about half the width of the head of a pin. By watching for worrisome changes within these tiny fish eggs, the technology could be used as a monitoring tool against environmental contamination or even biological weapons.

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Credit: Marshall Porterfield

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