Which preposition to use with liquefies

into Occurrences 2%

And she had adventures to lisp, with all the r's liquefied into l's, and I was with her all that day again.

at Occurrences 1%

And a similar appearance is produced when gelatine is inoculated with a pure culture of this bacillus, the gelatine liquefying at the seat of inoculation, and the small colony continually enlarging; but above it there occurs the excavated spot, like a bubble of air floating over the bacillary colony.

in Occurrences 1%

In its further growth the gelatine is liquefied in the vicinity of the colony, which at the same time sinks down deeper into the gelatine mass, and makes a small thread-like excavation in the gelatine, in the center of which the colony appears as a small white point.

Which preposition to use with  liquefies