dilution (redirected from dilutions)

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

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serial dilution  a set of dilutions in a mathematical sequence, as to obtain a culture plate with a countable number of separate colonies.

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di·lu·tion (d-lshn, d-)

n.

1. The act of reducing the concentration of a mixture or solution.

2. A diluted solution.

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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.

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dilution (di·lōōˑ·shn),

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.

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dilution

1. reduction of concentration of an active substance by admixture of a neutral agent.

2. a substance that has undergone dilution.

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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.