Can the sample tubes and the TissueLyser LT Adapter be cooled with liquid nitrogen?
No, cooling with liquid nitrogen would make the sample tubes brittle, resulting in breakage of the tubes during the disruption process. Cooling the adapter and sample tubes on dry ice or in a freezer to approx. -80°C is sufficient to prevent the samples from thawing during the disruption process.
See: TissueLyser Virtual Demo for a demonstration of cooling the samples on dry ice before using the TissueLyser LT.