dilution

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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.

di·lu·tion

(dī-lū'shŭn),
1. The act of being diluted.
2. A diluted solution or mixture.
3. In microbiologic techniques, a method for counting the number of viable cells in a suspension; a sample is diluted to the point where an aliquot, when plated, yields a countable number of separate colonies.

di·lu·tion

(di-lū'shŭn)
1. The act of being diluted.
2. A diluted solution or mixture.
3. microbiology A method for counting the number of viable cells in a suspension; a sample is diluted to the point at which an aliquot, when plated, yields a countable number of separate colonies.
References in periodicals archive ?
However, this effect was only significant with dilutions from 20 mL [kg.sup.-1] or higher.
After washing the cell monolayers with PBS, six dilutions of the test samples (200, 100, 50, 25, 12.5 and 6.25 ug/mL) were added in the plates.
According to dilution, the inverse of this number is 6.02 x 10 exponent minus 23.
Table I: Bactericidal effects of Acacia catechu on Staphylococcus aureus 0.5 ml of *N.B 1ml 1ml 1ml 1ml & Extract +0.5ml of 0.5 McFarland's turbidity of ATCC Staphy- lococcus Dilutions 1:1 1:2 1:4 1:8 MIC No growth No growth No growth No growth MBC No growth No growth No growth No growth 0.5 ml of *N.B 1ml 1ml Controls & Extract Known Extract +0.5ml of 0.5 orgm.
Found that dermatotsellyulyar serum (Table 5) has an inhibitory effect on allergen in cell culture on the third day before the 1:240 dilutions, 4th day - up to 1:280 dilutions.
Continue the same technique through all dilutions. From the last tube remove 0.5 mL of the diluted serum and save for use in further dilutions if need ed.
Figure 3a shows that for the low-rise building with no RTS, the lowest rooftop dilutions occurred for [theta] = 0[degrees].
To use this option, the FDA has recommended achieving a 1,000:1 dilution of effluent within the perimeter of the prohibited closure zone.
Five-fold dilutions of the allergenic extracts are made, and these are labeled dilutions # 1 through #6.
Of the 21 samples of pancreatic cyst fluid examined, 9 exhibited marked nonlinearity in the measurement of CEA and/or CA 19-9 upon dilution. There are a number of possible explanations for this finding.
In three subsequent lab sessions in which the students had to perform serial dilutions for each exercise, not one of the students made a mistake in performing a serial dilution.