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Examples. Continuous phase is often water. Wide range of sizes: bovine serum albumin: 3 nm. cells: tens of microns. Classify colloids as hydrophobic (e.g., carbon black) or hydrophilic (e.g., red blood cell). Stability of colloid: essential part of its function. whether or not it will coagulate.
Compare three solutions: true solution (e.g. table salt or sugar in water), colloid solutions (particles of proteins 100 – 1000 times greater than water molecule) and sand in water. a) b) c)
Solutions are homogeneous mixtures of two or more substances in which the components are present as individual atoms, molecules or ions. The individual components are uniformly distributed and are fare too small to be seen by eye. Liquid and gas solutions do not scatter much light and therefore are transparent (clear).
Colloids – mixtures with particle sizes that are intermediate in size and do not settle out upon standing. Ex: glue, Jello, paint, smoke, milk. Tyndall effect- the scattering of light in all directions. Suspensions and colloids exhibit this effect but solutions do not due to the fact th.
Colloid is a term that has come to encompass solid particles suspended in a liquid (a colloidal dispersion), microscopic droplets in a liquid (an emulsion), or either solid or liquid phases suspended in a gas (an aerosol).
25 paź 2017 · This chapter reviews various fluids available for intravenous (IV) administration. The IV fluids can be broadly divided into two categories: crystalloids and colloids. Crystalloid solutions contain water, electrolytes, and/or glucose, whereas colloids include mostly albumin and blood products.
We review briefly the concept of colloidal dispersions, their general properties and some of their most important applications, as well as the basic molecular interactions that give rise to their properties in equilibrium.
