Molecular reversion field

A molecular reversion field is a spatial anomaly that can interfer with transporter patterns and the molecular structures of objects passing through it.

In 2383, the Silillian starship Raptor also became trapped in and destroyed by such a field. Beamed out from inside was Kayl, who was so old that she was already on the verge of death from mere old-age. As the starship began to break-up, Kayl was beamed aboard the USS where she was changed into a healthy age in her late twenties. It was speculated that the power of the transporters, which were much stronger on most Starfleet vessels by this year, had a partial effect on her ribo-viroxic-nucleic structure.

The Phoenix-X also became trapped within this field. But after repolarizing a severely damaged hull to deflect the field, the Phoenix-X was released on full reverse impulse. (: "Life 2")