title: A preliminary study of chromium distribution in chromium-rich brewer's yeast cell by NAA.
abstract: The purpose of this study was to assess the chromium (Cr) distribution in chromium-rich brewer's yeast cell. The chromium concentrations in the cell wall and protoplast fractions of the chromium-rich yeast were determined by neutron activation analysis (NAA). Moreover, the combined state of chromium and amino acid content in the Cr-rich brewer's yeasts was analyzed and measured. The experimental results indicate that the introduction of water-soluble chromium(III) salt as a component of the culture medium for yeasts results in a substantial amount of chromium absorbed through the cell wall by the yeast, among which 80.9% are accumulated in the protoplast. It implies that, under optimal conditions, yeasts are capable of accumulating large amounts of chromium and incorporating chromium into organic compounds.
authors.affiliation: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, People's Republic of China.
authors.forename: W J
authors.initials: WJ
authors.lastname: Ding
authors.forename: Q F
authors.initials: QF
authors.lastname: Qian
authors.forename: X L
authors.initials: XL
authors.lastname: Hou
authors.forename: W Y
authors.initials: WY
authors.lastname: Feng
authors.forename: C Y
authors.initials: CY
authors.lastname: Chen
authors.forename: Z F
authors.initials: ZF
authors.lastname: Chai
authors.forename: B R
authors.initials: BR
authors.lastname: Zhang
authors.forename: K
authors.initials: K
authors.lastname: Wang
mesh_terms: D000596:Amino Acids / Q000032:analysis; D002473:Cell Wall / Q000737:chemistry; D002857:Chromium / Q000032:analysis*; D009501:Neutron Activation Analysis / Q000379:methods*; D011523:Protoplasts / Q000737:chemistry; D012441:Saccharomyces cerevisiae / Q000737:chemistry* / Q000166:cytology*
chemical_list: D000596:Amino Acids; D002857:Chromium