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Characteristics--- A semicolon-delimited list of terms that describe specific attributes of the sample or its constituents. Nominal particle characteristics (or vendor supplied) should be included in the Material File as characteristics. Experimentally determined characteristics should be included in the Assay File.

Characteristic term accession number---Identification number of a term selected from an ontology or a controlled vocabulary, if the term is entered as a value for material characteristic.

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Material linkage type---The type of linkage present in a nanoparticle sample (for example, attachment, encapsulation, entrapment etc.). If the linkage type is an entrapment or encapsulation, the material type column can specify whether the constituent is entrapped or encapsulated 

Material linkage type term accession number---Identification number of a term selected from an ontology or a controlled vocabulary, if the term is entered as a value for material linkage type.

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