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Gelators serve as stabilizers and thickeners, thickening the gel solution while simultaneously maintaining the gel’s flexible nature. [8] When dispersed through the solvent as a colloid, gelators offer a stable internal structure to the gel. [8] Gelators are usually chosen based on their affinity for the solvent and the purpose of the gel. [5]
Ferric subsulfate (also known as Monsel's solution) is often used by Jewish burial societies (chevra kadisha) to stop post-mortem bleeding.Since Jewish burial does not allow any external skin adhesives such as bandages, tape, glue or resin, ferric subsulfate is an effective way to stop post-mortem bleeding.
1984 – pulsed-field gel electrophoresis enables separation of large DNA molecules (Schwartz and Cantor) 2004 – introduction of a standardized polymerization time for acrylamide gel solutions to optimize gel properties, in particular gel stability [32] A 1959 book on electrophoresis by Milan Bier cites references from the 1800s. [33]
An upturned vial of hair gel Silica gel. A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. [1] [2] Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady state, although the liquid phase may still diffuse through this system.
The Flory–Rehner theory gives the change of free energy upon swelling of the polymer gel similar to the Flory–Huggins solution theory: = +. The theory considers forces arising from three sources: [2]
Potato starch slurry Roux. A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics.