Edible anurans have to rely on more than just poison glands which tend to work too late (i.e. after the predator has it in his mouth!) Related articles: How to Rid Your Garden of Toads-tips for dog owners (aside from training the dog of course!)
Manevalâs staining method is a negative staining method. To stain a capsule of a cell by Manevalâs staining method. 1  1 % Congo red solution.  Manevalâs stain.
What is photorefractive keratectomy (PRK)? Photorefractive keratectomy (PRK) is a procedure used to reduce the need for corrective eyewear by reshaping the cornea of the eye with a laser, thereby changing the way the eye focuses light. An excimer laser is used to ablate (remove) a thin layer of the cornea, changing the cornea's refractive (focusing) power.