Αποτελέσματα Αναζήτησης
27 Οκτ 2022 · When we make gelatin, such as Jell-O, we are making a type of colloid (Figure \(\PageIndex{8}\)). Gelatin sets on cooling because the hot aqueous mixture of gelatin coagulates as it cools and the whole mass, including the liquid, sets to an extremely viscous body known as a gel, a colloid in which the dispersing medium is a solid and the ...
- 7.10: Colloids and their Uses
Ordinary gelatine is a common example of a lyophilic...
- 7.10: Colloids and their Uses
4 Αυγ 2015 · Gelatin, when dissolved in water, is a colloid because the protein molecules that compose it, mostly derived from collagen, are much larger than usual dissolved molecules, but they remain evenly dispersed throughout the water.
Gelatin is therefore an example of a colloid, where one phase is microscopically mixed within another phase. A gel is just a specific type of colloid, where the liquid phase (in this case water) is dispersed within the solid phase (in this case gelatin).
13 Νοε 2022 · Ordinary gelatine is a common example of a lyophilic colloid. It is in fact hydrophilic , since it forms strong hydrogen bonds with water. When you mix Jell-O or tapioca powder to make a gelatine dessert, the material takes up water and forms a stable colloidal gel.
27 Σεπ 2022 · Colloids are classified as foams, aerosols, emulsions, gels, or sols, depending on the nature of the dispersed phase and dispersion medium. Familiar examples of colloids include mayonnaise, milk, fog, smoke, and gelatin. A gel is a colloid of solid particles in a liquid medium.
Gelatin desserts are colloids in which an aqueous solution of sweeteners and flavors is dispersed throughout a medium of solid proteins. (credit photo: modification of work by Steven Depolo) Pectin, a carbohydrate from fruit juices, is a gel-forming substance important in jelly making.
Gelatin sets on cooling because the hot aqueous mixture of gelatin coagulates as it cools and the whole mass, including the liquid, sets to an extremely viscous body known as a gel, a colloid in which the dispersing medium is a solid and the dispersed phase is a liquid. It appears that the fibers of the dispersing medium form a complex three ...
