It’s usually used for something that changes the superficial appearance of a thing without changing or obsuring its structure—and in this context it seems to mean making the DNA more detectable (by whatever means). I’m not picturing how this “dye” could do both those things at once on that scale.

[–] [email protected] 2 points 3 months ago

I don't know. It's a common practice though just look it up

[–] Glowstick 1 points 3 months ago

https://microbeonline.com/types-of-staining-techniques-used-in-microbiology-and-their-applications/