title: Imaging of selenium in plants using tapered metal monocapillary optics.
abstract: Tapered metal monocapillary optics provide a potential alternative to conventional methods of producing small X-ray beams. This paper presents the initial results of chemically specific imaging using such devices. Cellular resolution of organic selenium is obtained in a longitudinal section of mature Astragalus bisulcatus, a selenium hyperaccumulating plant. This work demonstrates the utility of metal monocapillary optics for imaging dilute levels of target elements in biological tissues.
authors.affiliation: Stanford Synchrotron Radiation Laboratory, SLAC, 2575 Sand Hill Road, MS 69, Menlo Park, CA 94025, USA. pickering@ssrl.slac.stanford.edu
authors.forename: Ingrid J
authors.initials: IJ
authors.lastname: Pickering
authors.forename: Gregory
authors.initials: G
authors.lastname: Hirsch
authors.forename: Roger C
authors.initials: RC
authors.lastname: Prince
authors.forename: Eileen Yu
authors.initials: EY
authors.lastname: Sneeden
authors.forename: David E
authors.initials: DE
authors.lastname: Salt
authors.forename: Graham N
authors.initials: GN
authors.lastname: George
mesh_terms: D027883:Astragalus Plant / Q000737:chemistry*; D007091:Image Processing, Computer-Assisted; D012643:Selenium / Q000032:analysis* / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission
chemical_list: D012643:Selenium