| 词汇 | colloid |
| 释义 | colloid noun[ C ] chemistry specializeduk /ˈkɒl.ɔɪd/ us /ˈkɑː.lɔɪd/ a mixture in which particles of one substance are held inside another substance胶体 Physical & chemical processes absorbable absorptive absorptive capacity absorptivity acidification endothermic reaction excitation excite exergonic exothermic exothermic reaction fermentation impregnate reabsorb react reboil recondense redox scald vaporize But colloid substances are also known to pass through the various partitions of the body. The chemist when he went deeper into the subject saw that he had to deal with the colloids, damp, unpleasant, gummy bodies that he had hitherto fought shy of because they would not crystallize or filter. The inability of a colloid to penetrate a membrane is due to the fact that it does not form a true solution. There is no endothelial lining, and the fibrous tissue of the wall is in immediate contact with the colloid material in the interior, which appears to be derived by a process of degeneration from the surrounding connective tissue. This term is applied to a cyst filled with a clear colourless jelly or colloid material, met with in the vicinity of a joint or tendon sheath. Examples of colloidcolloid The particles may be atoms, molecules, colloids or microorganisms. The colloids are completely retained and will be remobilized only to a low extent even under changes in ionic strength. During rain water infiltration, pollutants can be transported not only in solution but also in colloidal or colloid-bound form. Studies of colloid osmotic pressure in pregnancy induced hypertension. Randomized controlled study of colloid preload before spinal anaesthesia for caesarean section. Impairment of endothelial barrier function102 is suggested by the oedema, proteinuria, and decreased colloid osmotic pressure103 in the disease. These devices are highly effective in removing water and effectively increasing the colloid osmotic pressure and the hematocrit. Likewise, at high concentrations the more hydrated lithium ions are generally more effective at dispersing colloid particles than sodium or potassium ions. From these results, it could be predicted qualitatively that, under high ionic strength conditions, retention of colloids within the soil matrix is generally favored. Concordance and validation study of sentinel lymph node biopsy for breast cancer using subareolar injection of blue dye and technetium 99 m sulfur colloid. This must be compensated by infusion of colloids provided by human plasma or whole blood. The effects of varying volumes of crystalloid administration before cesarean delivery on maternal hemodynamics and colloid osmotic pressure. The particles may be ions, atoms, molecules, colloids or microorganisms. Tc-99m sulfur colloid is the most commonly used agent. Colloid solutions are more effective but there are limitations to their use. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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