Magnetite formation by a magnetic bacterium capable of growing aerobically

Tadashi Matsunaga, Toshifumi Sakaguchi, Fumihiko Tadakoro

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

A helically shaped magnetic bacterium was isolated from freshwater sediment and a pure culture was obtained. The growth medium contained succinate, nitrate and ferric malate as the carbon, nitrogen and iron sources, respectively. The magnetic bacterium, designated AMB-1, was able to grow in free gaseous exchange with an air atmosphere. When cells were grown aerobically on agar, oxidase activity was present, and white non-magnetic colonies, which did not show catalase activity, were formed. The stationary phase of growth was reached 4-5 days later at a cell concentration of 1.4×109 cells/ml in liquid culture when an initial cell concentration of 105 cells/ml was employed. After ultrasonic disruption of harvested cells, 2.6 mg bacterial magnetite was obtained from a 11 culture.

Original languageEnglish
Pages (from-to)651-655
Number of pages5
JournalApplied Microbiology and Biotechnology
Volume35
Issue number5
DOIs
Publication statusPublished - 1991 Aug
Externally publishedYes

Fingerprint

Ferrosoferric Oxide
Magnetite
Bacteria
Cells
Succinic Acid
Cell culture
Catalase
Agar
Nitrates
Oxidoreductases
Sediments
Nitrogen
Carbon
Iron
Ultrasonics
Liquids
Air
Growth
Fresh Water
Atmosphere

ASJC Scopus subject areas

  • Microbiology (medical)
  • Microbiology
  • Bioengineering
  • Biotechnology

Cite this

Magnetite formation by a magnetic bacterium capable of growing aerobically. / Matsunaga, Tadashi; Sakaguchi, Toshifumi; Tadakoro, Fumihiko.

In: Applied Microbiology and Biotechnology, Vol. 35, No. 5, 08.1991, p. 651-655.

Research output: Contribution to journalArticle

Matsunaga, Tadashi ; Sakaguchi, Toshifumi ; Tadakoro, Fumihiko. / Magnetite formation by a magnetic bacterium capable of growing aerobically. In: Applied Microbiology and Biotechnology. 1991 ; Vol. 35, No. 5. pp. 651-655.
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