Table 3.

Additive table data fields: additives to a medium were recorded in the additive table. Entries in this table were comprised of the DOI and MediumID of the medium in question, the name of the substance being added, the amount being added, and the units. A medium could have any number of additives, including zero

Additive table	Description
AdditiveID	Unique (within publication) numerical identifier to link an additive to entries in other tables
Additive	Name of additive
Concentration	Concentration of additive
Units	Units of additive
medium_MediumID	Reference to medium ID of the medium this additive was added to
medium_publication_DOI	Reference to DOI of medium’s source publication