EXPERIMENTS have been made with five specimens of methylene blue as a vital stain for the spermatocytes of Helix aspersa. The specimens were an old German ‘polychrome methylene blue', and four ...

copper oxidizes to a blue-green color, not dissimilar to the shade you see on copper statues. Make a DIY paste from equal parts flour, white vinegar, and salt and apply it to the stains using ...

From intricate residential patio work to decorative flooring to multi-hued columns in sports stadiums – plenty of today’s projects require contractors to use colored concrete. But how do you ...