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Depyrogenation refers to the removal of pyrogens from solutions, most commonly from injectable pharmaceuticals.. A pyrogen is defined as any substance that can cause a fever. . Bacterial pyrogens include endotoxins and exotoxins, although many pyrogens are endogenous to the ho
The action in Fourcault happens "at the draw", or area where the glass is taken from a liquid state into the start of the process needed to make it into flat glass. At the bottom of the draw is the "pit" or place where the molten glass is sufficiently cooled to be close to forming temperature.
Conservation-restoration is the practice of cleaning and discovering the original state of an object, investigating the proper treatments and applying those treatments to restore the object to its original state without permanently altering the object, and then preserving the object to prevent further deterioration for generations to come (Caple, p. 5-6). [1]
A widely used old adhesive that is orange or very dark brown in appearance. Once dried, the adhesive is very hard and becomes increasingly more brittle over time. Shellac does not break down easily with commercially available products. Additionally, the resin has naturally-occurring dyes that can stain ceramic pink or black.
Glass disease, also referred to as sick glass or glass illness, is a degradation process of glass that can result in weeping, crizzling, spalling, cracking and fragmentation. [ 1 ] [ 2 ] Glass disease is caused by an inherent instability in the chemical composition of the original glass formula. [ 3 ]
Marissa Nicholson, a group administrator with the "Weird and Wonderful Secondhand Finds That Just Need to Be Shared" group, says that uranium glass has been perennially popular in the group since ...
The physical origin of the non-Arrhenius behavior of fragile glass formers is an area of active investigation in glass physics. Advances over the last decade have linked this phenomenon with the presence of locally heterogeneous dynamics in fragile glass formers; i.e. the presence of distinct (if transient) slow and fast regions within the material.
In a fritted glass filter, a disc or pane of fritted glass is used to filter out solid particles, precipitate, or residue from a fluid, similar to a piece of filter paper. The fluid can go through the pores in the fritted glass, but the frit will often stop a solid from going through.