A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady state, although the … See more

Many gels display thixotropy – they become fluid when agitated, but resolidify when resting. In general, gels are apparently solid, jelly-like materials. It is a type of See more

Many substances can form gels when a suitable thickener or gelling agent is added to their formula. This approach is common in … See more

• Aerogel
• 2-Acrylamido-2-methylpropane sulfonic acid
• Agarose gel electrophoresis
• Food rheology
• Gel electrophoresis See more

Gels consist of a solid three-dimensional network that spans the volume of a liquid medium and ensnares it through surface tension effects. This internal network structure may result from physical bonds such as polymer chain entanglements (see See more

Colloidal gels
A colloidal gel consists of a percolated network of particles in a fluid medium, providing mechanical properties in particular the rise of elastic behaviour. The particles can show attractive interactions through See more

Some species secrete gels that are effective in parasite control. For example, the long-finned pilot whale secretes an enzymatic gel that rests on the outer surface of this animal and helps prevent other organisms from establishing colonies on the surface of … See more