Use of canonical variates analysis in differentiation of bacteria by pyrolysis gas-liquid chromatography
| Autor: | Colin S. Gutteridge, John R. Norris, Halliday J. H. Macfie |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Mahalanobis distance
Chromatography Gas Hot Temperature Bacteria Statistics as Topic Analytical chemistry Biology biology.organism_classification Microbiology Random variate Principal component analysis Food Microbiology Methods Gas chromatography Multivariate statistical Biological system Pyrolysis |
| Zdroj: | Journal of general microbiology. 104(1) |
| ISSN: | 0022-1287 |
| Popis: | Low-resolution pyrolysis gas-liquid chromatography (p.g.l.c.) can differentiate genera of aerobic food spoilage bacteria. Multivariate statistical techniques were applied but neither principal components nor furthest neighbour cluster analysis produced a consistent differentiation although both confirmed the reproducibility of p.g.l.c. When the distance between genera was redefined in terms of Mahalanobis D2- a generalized concept taking into account scatter around the mean-good differentiation was observed and could be displayed graphically by plotting the genus group means relative to the first two canonical variate axes. The coefficients of the canonical variates provide a strategy for discriminating between the genus groups. Some practical problems in the identification of unknowns using this technique are discussed. |
| Databáze: | OpenAIRE |
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