Bodian stained sections show marked precipitation; this could probably be prevented in the future by using what?

• A. Chemically cleaned glassware
• B. Fresh reagents
• C. Shorter staining time
• D. Higher temperature

Answer: (A)

The key idea is control of artifacts in a silver-based stain by removing contaminants that trigger unwanted silver precipitation. Bodian staining uses reagents that are highly sensitive to trace metals and residues. When glassware isn’t thoroughly cleaned, residual minerals, detergents, or previous reagents can leach into solutions and act as nucleation sites or catalytic contaminants, causing marked precipitation in the tissue sections. Cleaning glassware chemically removes these residues, reducing the chance of such unintended reactions and giving a cleaner, more consistent stain.

Fresh reagents help overall quality, but precipitation artifacts are most directly prevented by eliminating surface contaminants. Shortening staining time or increasing temperature alter the staining process itself and can worsen or shift precipitation rather than specifically preventing it.