The conical, straight-sided pint glass, also known as a Boston shaker glass, was originally used to shake cocktails, not serve beer. But it has been a fixture in bars since the early 20th century, thanks to its utility: Itâs easy to stack, hard to break and perfect for displaying beer or bar advertisements.
Apart from glove material, other factors contributed to glove permeability, such as the duration of exposure, the thickness of the material, and the liposolubility or the molecular weight of the drug. Permeation was clearly related to the duration of exposure. All glove materials displayed a general trend toward greater permeation over time, increasing by a mean 5-fold factor between 15 and 60 minutes (the steepest increase being observed during the first 15 minutes).
Degradation is a reduction in one or more. physical properties of a glove material due to contact. with a chemical. Certain glove materials may become. hard, stiff, or brittle, or they may grow softer, weaker, and swell to several times their original size. If a. chemical has a significant impact on the physical. properties of a glove material, its permeation resistance. is quickly impaired.