Sentence examples for both tubes were then from inspiring English sources

Both tubes were then sent to the on-site bacteriology laboratory.

The tubes were then capped off.

The anode tubes were then dried and fired.

The tubes were then kept at 25 °C for 24 h.

The tubes were then pelleted and the supernatant aspirated.

Tubes were then stored at −80°C until analysis.

The Eppendorf tubes were then stored at −20°C.

Tubes were then placed in the instrument.

Tubes were then stored at −80 °C.

The falcon tubes were then centrifuged again.

The tubes were then sealed with Critoseal capillary tube sealant.