The detection of the dipicolinic acid biomarker in Bacillus spores using Curie-point pyrolysis mass spectrometry and Fourier-transform infrared spectroscopy
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- @Article{goodacre:2000:ddabmbscppmsftis,
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author = "Royston Goodacre and Beverley Shann and
Richard J. Gilbert and Eadaoin M. Timmins and
Aoife C. McGovern and Bjorn K. Alsberg and Douglas B. Kell and
Niall A. Logan",
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title = "The detection of the dipicolinic acid biomarker in
Bacillus spores using Curie-point pyrolysis mass
spectrometry and Fourier-transform infrared
spectroscopy",
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journal = "Analytical Chemistry",
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year = "2000",
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volume = "72",
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number = "1",
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pages = "119--127",
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month = "1 " # jan,
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publisher = "American Chamical Society",
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keywords = "genetic algorithms, genetic programming",
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URL = "http://pubs.acs.org/cgi-bin/article.cgi/ancham/2000/72/i01/html/ac990661i.html",
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DOI = "doi:10.1021/ac990661i",
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abstract = "Thirty-six strains of aerobic endospore-forming
bacteria confirmed by polyphasic taxonomic methods to
belong to Bacillus amyloliquefaciens, Bacillus cereus,
Bacillus licheniformis, Bacillus megaterium, Bacillus
subtilis (including Bacillus niger and Bacillus
globigii), Bacillus sphaericus, and Brevi laterosporus
were grown axenically on nutrient agar, and vegetative
and sporulated biomasses were analyzed by Curie-point
pyrolysis mass spectrometry (PyMS) and diffuse
reflectance-absorbance Fourier-transform infrared
spectroscopy (FT-IR). Chemometric methods based on rule
induction and genetic programming were used to
determine the physiological state (vegetative cells or
spores) correctly, and these methods produced
mathematical rules which could be simply interpreted in
biochemical terms. For PyMS it was found that m/z 105
was characteristic and is a pyridine ketonium ion
(C6H3ON+) obtained from the pyrolysis of dipicolinic
acid (pyridine-2,6-dicarboxylic acid; DPA), a substance
found in spores but not in vegetative cells; this was
confirmed using pyrolysis-gas chromatography/mass
spectrometry. In addition, a pyridine ring vibration at
1447-1439 cm-1 from DPA was found to be highly
characteristic of spores in FT-IR analysis. Thus,
although the original data sets recorded hundreds of
spectral variables from whole cells simultaneously, a
simple biomarker can be used for the rapid and
unequivocal detection of spores of these organisms.",
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notes = "
PMID: 10655643",
- }
Genetic Programming entries for
Royston Goodacre
Beverley Shann
Richard J Gilbert
Eadaoin M Timmins
Aoife C McGovern
Bjorn K Alsberg
Douglas B Kell
Niall A Logan
Citations