. Principles of modern biology. Biology. SOL GEL play between the colloid particles, so that the dispersed particles of the system become in- terlinked, forming a colloidal network that extends throughout the gel (Fig. 4-23B). The water and other crystalloidal compo- nents are enmeshed by the gel framework and consequently the whole mass develops rigidity, elasticity, and contractility—prop- erties that ordinarily are found only in solid systems. The precise manner in which the elongate particles of a sol become linked together to Fig. 4-23. Ultramicroscopic structure of a sol and a gel (diagr
. Principles of modern biology. Biology. SOL GEL play between the colloid particles, so that the dispersed particles of the system become in- terlinked, forming a colloidal network that extends throughout the gel (Fig. 4-23B). The water and other crystalloidal compo- nents are enmeshed by the gel framework and consequently the whole mass develops rigidity, elasticity, and contractility—prop- erties that ordinarily are found only in solid systems. The precise manner in which the elongate particles of a sol become linked together to Fig. 4-23. Ultramicroscopic structure of a sol and a gel (diagrammatic). A, a sol, in which the elongate colloidal molecules or particles are folded and separate. B, same system after gelation has occurred, in which the elongate particles are unfolded and interlinked, forming a colloidal network. Gels tend to be elastic and contractile. The zig- zag lines represent elongate colloidal particles (, protein molecules); the dots represent water and other crystal- loidal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marsland, Douglas, 1899-. New York, Holt, Rinehart and Winston
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