The enzyme causes glucose to undergo a chemical reaction in which it loses electrons.

The atoms losing electrons become a positive charge.

Because the reducing agent is losing electrons, we say it has been oxidized.

Thus, zinc metal will lose electrons to copper ions and develop a positive electrical charge.

In doing so, the solute loses or gains electrons.

One of water's elements is being oxidized - losing electrons.

During redox reactions elements gain or lose electrons, and as a result they change oxidation numbers.

In an oxidising environment metal (and some non-metal) ions will lose electrons.

Ionic is used to describe atoms that have lost or gained electrons.

I'd imagine losing electrons and even transmuting the nuclei in the chamber has got to do something to it.