For some years, it was suspected that Cooksonia and its species were poorly characterized.

To date, only 3000 to 4000 toxins have been described, and for most of them, pharmacological properties are either unknown or poorly characterized.

In the Pacific, migration patterns are poorly characterized.

For example, the simple oxide BiO remains poorly characterized.

LTR- retrotransposons are poorly characterized and lipids have not reported.

Long term efficacy remains poorly characterized.

This type of IGE can present at almost any age and is poorly characterized.

Psychotic-like features and poorly characterized behavior abnormalities may also be present.

Hydroxides of mercury are poorly characterized, as they are for its neighbors gold and silver.

Alkoxide and carboxylate derivatives however tend to associate and often poorly characterized.