About: http://webisa.webdatacommons.org/212952028

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Among the most often detected contaminants of biological samples are the impurities present in the solvents used for tissue washing and matrix deposition, salt adducts, keratin or polymers such as OCT or polyethylene glycol (PEG).
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov