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.
Boxplot of concentration z score by Condition. Base: All observations for concentrations 0.5–1000. See Table 1 for preparative condition details. Briefly: Conditions 1–3 are standard plastic tubes and conditions 4–6 low-retention plastic. Pairs (1,4), (2,5) and 3,6) correspond to water, stabilising solution and carrier DNA solutions respectively.
