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dilution |
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dilution /di·lu·tion/ (di-loo´shun)
1. reduction of concentration of an active substance by admixture of a neutral agent. 2. a substance that has undergone dilution. 3. in homeopathy, the diffusion of a given quantity of a medicinal agent in ten or one hundred times the same quantity of water.dilu´tional serial dilution a set of dilutions in a mathematical sequence, as to obtain a culture plate with a countable number of separate colonies.
dilution [di-loo´shun] 1. reduction of concentration of an active substance by admixture of a neutral agent. 2. a substance that has undergone such a process. serial dilution a set of dilutions in a mathematical sequence. In microbiological technique, serial dilutions are used to obtain a culture plate that yields a countable number of separate colonies. From this, a calculation of viable cells in the original suspension can be made, as a colony picked for pure culture.
dilution (di·lōōˑ·sh n decreasing the concentration; for essential oils used in aromatherapy, the dilution range is between 1% and 5%.
dilutions, ultra-high, n.pl in homeo-pathy, solutions of substances that have been repeatedly agitated and diluted. dilution 1. reduction of concentration of an active substance by admixture of a neutral agent. 2. a substance that has undergone dilution. limit dilution a method of obtaining a pure culture of bacteria or virus by subculturing from the highest dilution in which the organism is demonstrably present. serial dilution 1. the progressive dilution of a substance or infectious agent in a series of tubes or wells in a tray in predetermined ratios, e.g. 2-fold or 10-fold dilution steps. 2. a method of obtaining a pure bacterial culture by rapid transfer of a small amount of material from one nutrient medium to a succeeding one of the same volume. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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