IUPAC definition
A gel has a finite, usually rather small, yield stress. A
gel can contain: a covalent polymer network; a polymer network formed through
the physical aggregation of polymer chains, caused by hydrogen bonds,
crystallization, helix formation, complexation; a polymer network formed
through glassy junction points, e.g., one based on block copolymers. If the
junction points are thermally reversible glassy domains, the resulting swollen
network may also be termed a thermoreversible gel; lamellar structures
including mesophases; particulate disordered structures.
Hydrogel: Gel in which the swelling agent is water. The
network component of a hydrogel is usually a polymer network. A hydrogel in
which the network component is a colloidal network may be referred to as an
aquagel.
METHOD
Cholesterol crystal purity of 95% was used.
It is maybe Q glass
Cholesterol gel and impermeability.
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