PMC:7532132 / 6282-6573 JSONTXT

{"project":"2_test","denotations":[{"id":"33006710-16233912-28305","span":{"begin":215,"end":217},"obj":"16233912"}],"text":"Materials\nIbuprofen sodium salt [\u003e 98%] purchased from Sigma-Aldrich, PVA [molecular weight (Mw) = 146,000–186,000 g/mol, 87–89% hydrolyzed] purchased from Sigma-Aldrich, and PHEA was synthesized in lab previously (32,33). Buffer tablets pH 6.8 and ethanol were purchased from Sigma-Aldrich."}