Assertion: melanin | /r/HasProperty | exposed to air
Facets:
value: with a hydration level
type: OTHER
Source sentences:
text: Two types of embedded water molecules are present in melanin: some are adsorbed on the surface and/or weakly bound into the bulk polymer and can be easily removed under vacuum, others are strongly bound to the bulk polymer structure and their removal generally requires thermal treatment.12, 13 Weakly bound water is typical of melanin exposed to air with a hydration level depending on the relative ambient humidity degree.25,