The pit does not have any magical properties. What turns the guac brown is the air. If you can keep air from touching the guac then it will stay green. The pit will keep a portion away from the air, but what is more affective is to put plastic wrap over it and push it right down onto the surface.
Denuded skin is just another way of saying that the top layer (epidermis) of skin is gone...either from friction (abrasion or tear), trauma (tape burns), or severe rashes, or from a stage II pressure ulcer.
(Source: http://www.wagnermeters.com) In this video, Rapid RH Product Specialist Jason Spangler explains what hydrostatic pressure in a concrete slab really is. Concrete can be a problem when we do not comprehend the fundamental construction terms related to its installation. The term, hydrostatic pressure, is often misused to describe the dangers of moisture. High relative humidity (RH) levels and hydrostatic pressure can both ruin floors.