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Figure F4. Green fluorescence of sealants and pipe dope used in borehole observatory construction, mixed with SYTO 9 stain. Fluorescence of Dow Corning Compound 111 (A) in a smear and (B) after sonication in water. Fluorescence of Loctite 30561 thread sealant (C) as a smear and (D) after sonication in water. E. Fluorescence of Bestolife 60% lead-base dope in a smear. Scale bars = 10 µm.

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