Results 261 to 270 of about 22,950,779 (300)

Estimation of Bacterial Densities by Means of the "Most Probable Number"

Biometrics, 1950
THIS PAPER attempts to give a simple account of the concept of the "most probable number" (m.p.n.) of organisms in the dilution method. The concept is quite old, going back to McCrady (4) in 1915, and has been discussed by various writers from time to time, so that little of what I shall present is new. In addition, some advice is given on the planning
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On the estimation of the most probable number in a serial dilution experiment

Communications in Statistics - Theory and Methods, 1978
The purpose of this paper is to present some alternative estimates for the 'most probable number' of bacteria in a serial dilution experiment. These estimates are directed to be less biased than the ordinary maximum likelihood estimate. A numerical example illustrates the extent to which the variance and the mean square error of these estimates are ...
Ibrahim A. Salama, Gary G. Koch, Dennis H. Tolley   +2 more
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Note on the Most Probable Number of Partons in Parton Models

Physical Review D, 1971
From analysis of the inelastic $e\ensuremath{-}p$ scattering data it is found that an important feature of the parton probability function $P(N)$ is that it should be peaked around some small number of partons. The most probable number of partons is prognosticated to be around 4.5.
C. W. Gardiner, D. P. Majumdar
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An interactive microcomputer program for the computation of most probable number

Journal of Microbiological Methods, 1984
Abstract An interactive computer program for the rapid computation of Most Probable Numbers (MPN) with 95% confidence intervals and goodness-of-fit, is presented. The program, written in ‘MICROSOFT BASIC’ employs an iterative algorithm based on a modification of the Newton-Raphson method and accomodates any number of replicates up to ten dilutions ...
M.T. MacDonell, E. Russek, R.R. Colwell
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A new technique for most-probable-number counts of Rhizobia

Plant and Soil, 1972
MPN (most-probable-number) counts of rhizobia by using legumes grown in plastic pouches were essentially equal to pour-plate counts. By using plastic pouches, 60 growth units could be placed in 684 cm2 of bench space, and only 20 minutes were required to prepare and seed 60 plastic pouches for inoculations.
R. W. Weaver, L. R. Frederick
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The “most probable number” estimate and its confidence limits

Water Research, 1993
Abstract The dilution method is used to obtain an indirect count of microorganisms, e.g. fecal bacteria commonly used as human contamination indicators, in a suspension. The Most Probable Number estimate provides a quantification of dilution method results. This estimate is commonly obtained by using Poisson distribution. Although the use of binomial
Benoit Beliaeff, Jean-Yves Mary
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Calculating Most Probable Numbers in Coli‐Aerogenes Analyses

Journal AWWA, 1940
increasing use of the coli-aerogenes test to estimate the pollution of waters has been paralleled by the development of the mathematical theory for calculating "most probable numbers" from fermentation tube results. This development has been traced by J. K. Hoskins (1, 2, 3) and need not be reviewed here.
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Counting Asbestos Fibers by the Most Probable Number Method

American Industrial Hygiene Association Journal, 1975
A procedure for evaluating asbestos fiber counts is described which uses the most probable number method of bacteria counting. This technique is faster than conventional counting methods, with approximately comparable accuracies, although it suffers from a lack of rigor and requires the observer to estimate fiber concentrations to within an order of ...
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Most-probable-number technique for the enumeration of aromatic degraders in natural environments

Microbial Ecology, 1977
A most-probable-number (MPN) method is described for the enumeration of heterotrophic populations capable of utilizing chlorinated and nonchlorinated benzoates and phenols as sole carbon sources. A correlation coefficient of 0.91 was obtained between the numbers determined by the MPN technique and the standard plate count. The MPN method gave realistic
M J, Digeronimo, M, Nikaido, M, Alexander   +2 more
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Titer — und Most Probable Number Technik

1984
Die Bestimmung niedriger Keimgehalte durch Koloniezahlung ist, wie bereits beschrieben, nur bei filtrierbaren Flussigkeiten mittels Membranfiltrations-Verfahren moglich. Fur einen grosen Teil der Lebensmittel ist diese Zahlmethode jedoch nicht anwendbar.
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