Freeze–thaw pretreatment conditions.
| Samples | Temperature (°C) | Time (h) |
|---|---|---|
| A1 | −4 °C | 12 |
| A2 | 24 | |
| A3 | 48 | |
| B1 | −20 °C | 12 |
| B2 | 24 | |
| B3 | 48 | |
| CK | — | — |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.