Enumerations for _Sample.Type (An open enumeration)
bicelle	enumeration_text
emulsion	enumeration_text
fiber	'solid-state fiber sample'
fibrous protein	enumeration_text
filamentous virus	enumeration_text
gel solid	'gel samples used for solid-state NMR'
gel solution	'gel samples used for solution NMR'
liposome	enumeration_text
lyophilized powder	enumeration_text
membrane	enumeration_text
micelle	enumeration_text
oriented membrane film	enumeration_text
polycrystalline powder	enumeration_text
reverse micelle	enumeration_text
single crystal	enumeration_text
solid	enumeration_text
solution	enumeration_text