title: Electron Microscopy and X-ray Analysis of Cr-Containing Precipitates Synthesized by Newly Isolated Actinobacterium, Flexivirga alba ST13(T.).
abstract: Chromium(Cr) precipitate synthesized by Cr(VI)-reducing bacterium Flexivirga alba ST13(T) was examined using transmission electron microscopy (TEM) and the energy dispersive X-ray (EDX). The strain showed altered-morphology after exposing to Cr(VI) in minimal medium. The resultant precipitate included bacterial pellet and needle-like structure which was similar to the structure made from Cr(OH)3 precipitate. Cr was observed in bacterial cells using TEM-EDX. Bacteria with high electron density showed the precipitation of Ca in addition to Cr. The isolated strain would be useful to precipitate Cr from Cr(VI)-containing environment.
authors.affiliation: School of Bioscience and Biotechnology, Tokyo University of Technology, 1401-1 Katakura-machi, Hachioji, Tokyo 192-0982 Japan.
authors.forename: Tomoyasu
authors.initials: T
authors.lastname: Sugiyama
authors.affiliation: Faculty of Life and Environmental Sciences, Prefectural University Hiroshima, 562 Nanatsuka-cho, Shobara, Hiroshima, Hiroshima 727-0023 Japan.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Sakaguchi
keywords: Actinobacterium; Bacterium; Chromium; Electron microscopy