Abstract
I? has been known, probably from the earliest times, that when sufficiently concentrated solutions of certain substances, such as gelatin and agar-agar, are allowed to cool, instead of depositing crystals of the dissolved substance, the whole liquid turns into a jelly. It is natural, therefore, that speculations on the nature of jellies should have been rife long before Graham, in 1861, first pointed out, the slow rate of diffusion of colloid substances which distinguished them from bodies which separate from solution in the ordinary crystalline form.
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References
Bradford, Science Progress, 1917, 12, 62; Biochem. Jour. 1918, 12, 357; 1920, 14, 91; 1921, 15, 553; and “The Physics and Chemistry of Colloids,” Discussion by the Faraday Society, etc., London, 1921.
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BRADFORD, S. The Nature of Gels. Nature 111, 200–202 (1923). https://doi.org/10.1038/111200b0
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DOI: https://doi.org/10.1038/111200b0
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