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SEMs from Gruta das Agulhas, Terceira
SEMs from Gruta das Agulhas, Terceira
Scanning electron microscopy of a yellow nubbin from the lower passage in Gruta das Agulhas. Much of the nubbin was covered by biofilm, but breaks in the biofilm revealed the underlying rock surface, which was analyzed with EDX, and microorganisms contained in the biofilm. These microorganisms revealed studded spore-like shapes, spheres with copious amounts of either extracellular polymeric substances (snot) or some kind of cellular structure, such as fimbrae.
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Date: 06/17/2009
Owner: dnorthup
Size: 15 items
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GA7-06
Overview of broken biofilm, exposing rock underneath, some distance below GA7-07, which was taken before GA7-06.
Date: 06/17/2009
Views: 71
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GA7-02
Overview of biofilm coated surface at 250X magnification.
Date: 06/17/2009
Views: 65
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GA7-08
Closeup of area in middle of GA7-06. Shows possible studded spores, filaments, and mineral striations.
Date: 06/17/2009
Views: 64
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GA7-12
Closer view of spheres (spores?) with studds on GA7-10.
Date: 06/17/2009
Views: 61
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GA7-09
Closeup of center of GA7-08 showing mineral striations.
Date: 06/17/2009
Views: 59
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GA7-03
Closeup of filaments and broken edge of biofilm just off the upper edge of GA7-02. Tiny filament is 100 nm wide; big filament is 640 nm wide; ragged, hairy filament is 500 nm.
Date: 06/17/2009
Views: 53
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GA7-11
Closer view of striations or corrosion in GA7-10. Small spheres are 70-80 nm in width.
Date: 06/17/2009
Views: 53
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GA7-15
Closer view of upper edge of mound in GA7-13.
Date: 06/17/2009
Views: 53
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GA7-16
Closer view still of organisms in GA7-15. Spheres with lots of fimbrae.
Date: 06/17/2009
Views: 51
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