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).
1 To remove the effect of size from resistance, resistivity is used-this is a material property which does not depend on size. 2  Restivity is affected by temperature-for most materials the resistivity increases with temperature.