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.
PRK (photorefractive keratectomy). A surgeon removes microthin layers of tissue from the outermost layer of the cornea with a sterile brush and uses a laser to reshape the cornea to correct either nearsightedness, farsightedness, or astigmatism. Then a contact lens is placed over the eye as a temporary bandage.