title: Atmospheric pressure chemical ionization and electron capture negative chemical ionization mass spectrometry in studying beta-carotene conversion to retinol in humans.
authors.affiliation: United States Department of Agriculture, Jean Mayer Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts 02111, USA.
authors.forename: G
authors.initials: G
authors.lastname: Tang
authors.forename: B A
authors.initials: BA
authors.lastname: Andrien
authors.forename: G G
authors.initials: GG
authors.lastname: Dolnikowski
authors.forename: R M
authors.initials: RM
authors.lastname: Russell
mesh_terms: D002247:Carbon Isotopes; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003903:Deuterium; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D012044:Regression Analysis; D015203:Reproducibility of Results; D013997:Time Factors; D014801:Vitamin A / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D019207:beta Carotene / Q000737:chemistry / Q000378:metabolism*
chemical_list: D002247:Carbon Isotopes; D019207:beta Carotene; D014801:Vitamin A; D003903:Deuterium