Perhaps you should try some spelling variations:
"biochemical characterization" » "chemical characterization", "material characterization"
"mechanical characterization" » "chemical characterization", "material characterization"
"optical characterization" » "chemical characterization", "material characterization", "functional characterization"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("biochemical characterization") OR ("mechanical characterization"))) OR ("optical characterization")).
• Removing quotes may allow a broader search: (((( biochemical characterization ) or ( mechanical characterization ))) or ( optical characterization )).
• Adding a wildcard symbol may retrieve word variants: (((("biochemical characterization") or ("mechanical characterization"))) or ("optical characterization"))*.