Gastric nonabsorbable indicators in man: a comparison of phenol red and polyethylene- 14 C glycol.
D002247:Carbon Isotopes; D003124:Colorimetry; D006018:Glycols; D006801:Humans; D007201:Indicator Dilution Techniques; D007202:Indicators and Reagents; D010636:Phenols; D011108:Polymers; D013270:Stomach / Q000502:physiology
D002247:Carbon Isotopes; D006018:Glycols; D007202:Indicators and Reagents; D010636:Phenols; D011108:Polymers