Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Characteristics of Thermophilic Bacteria and Secondary Materials Attached on the Pyrrhotite, Uljin

울진 자류철석 표면에 부착한 고온성박테리아와 2차 생성물의 특성

  • Park, Cheon-Young (Department of Energy and Resource Engineering, Chosun University) ;
  • Kim, Bong-Ju (Department of Energy and Resource Engineering, Chosun University)
  • 박천엽 (조선대학교 공과대학 에너지자원공학과) ;
  • 김봉주 (조선대학교 공과대학 에너지자원공학과)
  • Received : 2010.11.13
  • Accepted : 2010.12.17
  • Published : 2010.12.30
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Abstract

Characteristics of thermophilic bacteria and secondary materials on the pyrrhotite surface were investigated by using scanning electron microscopy (SEM). The thermophilic bacteria from an acid hot spring in Japan were incubated with pyrrhotite at $42^{\circ}C$, $52^{\circ}C$, and $62^{\circ}C$ respectively. SEM analysis of the reacted pyrrhotite showed that indigenous rod-shaped bacteria ranging from $0.4{\times}1.5{\mu}m$ to $0.3{\times}11.9{\mu}m$ in size were attached to the pyrrhotite surface at these temperatures with formation of secondary materials. Extracellular polymer substances were formed on the bacterial surface. We suggest that these polymers functioned as a capsule protecting bacteria from the extreme environment. Secondary materials such as elemental sulfur, Fe-hydroxide, S-Fe and O-P-Fe compounds were found on the pyrrhotite surface.

자류철석 표면에 부착한 고온성박테리아들과 이차 생성물을 전자현미경분석을 통하여 조사하였다. 일본 산성 온천수에서 채취된 고온성박테리아를 자류철석에 $42^{\circ}C$, $52^{\circ}C$, $62^{\circ}C$에 각각 접종하였다. 반응된 자류철석 표변에는 2차 생성물과 막대 모양의 박테리아들이 각각 부착하여 나타났다. 자류철석 표면에 부착한 박테리아들의 크기는 $0.4{\times}1.5{\mu}m$에서 $0.3{\times}11.9{\mu}m$ 범위였다. 박테리아들은 세포외중합체물질을 생성하는 것으로 관찰되었으며 이들 세포외중합체물질의 기능은 극한 환경으로부터 박테리아 자신을 보호하는 보호막 역할을 하는 것으로 추정되었다. 원소 황, 철수산화물, S와 Fe로 구성된 결정들, 그리고 O, P, Fe 결정들이 2차 생성물로 관찰되었다.

Keywords

References

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