PYROLYSIS MASS

Laser desorption is commonly used for pyrolysis/mass spectrometry, in which small samples are heated very rapidly to high temperatures to vaporize them before they are ionized. In this application of lasers, very small samples are used, and the intention is not simply to vaporize intact molecules but also to cause characteristic degradation. [Pg.12]

Pyrolysis mass spectrometry, which does not require a volatile derivative, has been applied to various penicillins (78MI51100). These spectra contained fragments arising from the bicyclic ring system (4,5-dihydro-5,5-dimethylthiazole at mje 115, 1- and 2-methylpyrrole at mje 81 and unidentified peaks at m/e 100 and 125) as well as a series of fragments characteristic of the C(6) side chain. [Pg.302]

W. Windig and H.L.C. Meuzelaar, Nonsupervised numerical component extraction from pyrolysis mass spectra of complex mixtures. Anal. Chem., 56 (1984) 2297-2303. [Pg.305]

W. Windig, C.E. Heckler, FA. Agblevor and R.J. Evans, Self-modeling mixture analysis of categorized pyrolysis mass-spectral data with the Simplisma approach. Chemom. Intell. Lab. Syst., 14(1992) 195-207. [Pg.305]

R. Goodacre, D.B. Kell and G. Bianchi, Rapid identification of species using pyrolysis mass spectrometry and artificial neural networks of propionibacterium acnes isolated from dogs. J. Appl. Bacteriol., 76 (1994) 124-134. [Pg.696]

R. Goodacre, J. Pygall and D.B. Kell, Plant seed classification using pyrolysis mass spectrometry with unsupervised learning the application of auto-associative and Kohonen artificial neural networks. Chemom. Intell. Lab. Syst., 33 (1996) 69-83. [Pg.698]

R. Goodacre, Characterisation and quantification of microbial systems using pyrolysis mass spectrometry introducing neural networks to analytical pyrolysis, Microbiol. (Europe), 2 19 (1994). [Pg.407]

T-MS). The main direct mass-spectral methods are thermal desorption and pyrolysis mass spectrometry. Several factors favour the efficiency at which volatiles can be removed from a polymeric matrix ... [Pg.410]

DPyMS Direct pyrolysis mass EGC Evolved gas collection... [Pg.753]

PyMS Pyrolysis mass spectrometry SALS Small-angle light scattering... [Pg.759]

Pyrolysis Mass Spectrometry of Recent and Fossil Biomaterials. Compendium and Atlas... [Pg.3]

In this study, we extend the range of inorganic materials produced from polymeric precursors to include copper composites. Soluble complexes between poly(2-vinylpyridine) (P2VPy) and cupric chloride were prepared in a mixed solvent of 95% methanol 5% water. Pyrolysis of the isolated complexes results in the formation of carbonaceous composites of copper. The decomposition mechanism of the complexes was studied by optical, infrared, x-ray photoelectron and pyrolysis mass spectroscopy as well as thermogravimetric analysis and magnetic susceptibility measurements. [Pg.430]

Pyrolysis mass spectroscopy was conducted with a Hewlett-Packard model 5985B gas chromatograph/quadrupole mass spectrometer, operated at sslO- Torr and 70eV electron-impact ionization energy. Samples were introduced into the mass spectrometer via a glass lined direct insertion probe (DIP). The samples were decomposed in the DIP to a nominal temperature of 300°C at a heating rate of 30°C/min. [Pg.431]

Wright, M. and B. Wheals (1987), Pyrolysis-mass spectrometry of natural gums, resins and waxes and its use for detecting such materials in ancient Egyptian cases, /. Appl. Pyrol. 11,195-211. [Pg.626]

Basile, F. Voorhees, K. J. I Iadfield.T. L. Microorganism Gram-type differentiation based on pyrolysis mass-spectrometry of bacterial fatty-acid methyl-ester extracts. Appl. Environ. Microbiol. 1995, 61,1534-1539. [Pg.88]

METHOD REPRODUCIBILITY AND SPECTRAL LIBRARY ASSEMBLY FOR RAPID BACTERIAL CHARACTERIZATION BY METASTABLE ATOM BOMBARDMENT PYROLYSIS MASS SPECTROMETRY... [Pg.91]

An ANN is an array of three or more interconnected layers of cells called nodes (much like columns of cells in a spreadsheet). Data are introduced to the ANN through the nodes of the input layer. For instance, each input layer node can contain the relative intensity of one of the m/z values from a bacterial pyrolysis mass spectrum. The output layer nodes can be assigned to iden-... [Pg.113]

Cartmill,T. D. Orr, K. Freeman, R. Sisson, P. R. Lightfoot,N. F. Nosocomial infection with Clostridium difficile investigated by pyrolysis mass spectrometry. J. Med. Microbiol. 1992,37, 352-356. [Pg.121]

Freeman, R. Gould, F. K. Wilkinson, R. Ward, A. C. Lightfoot, N. F. Sisson, P. R. Rapid inter-strain comparison by pyrolysis mass spectrometry of coagulase-negative staphylococci from persistent CAPD peritonitits. Epidemiol. Infect. 1991, 106,239-246. [Pg.121]

Sisson, P. R. Kramer, J. M. Brett, M. M. Freeman, R. Gilbert, R. J. Lightfoot, N. F. Application of pyrolysis mass spectrometry to the investigation of outbreaks of food poisoning and non-gastrointestinal infection associated with Bacillus species and Clostridium perfringens. Int. J. Food Microbiol. 1992,17, 57-66. [Pg.122]

Beverly, M. B. Basile, F. Voorhees, K. J. Fatty acid analysis of beer spoiling microorganisms using pyrolysis mass spectrometry. J. Am. Soc. Brewing Chemists 1997, 55,79-82. [Pg.122]

Goodacre, R. Trew, S. Wrigley-Jones, C. Neal, M. J. Maddock, J. Ottley, T. W. Porter, N. Kell, D. B. Rapid screening for metabolite overproduction in fermentor broths using pyrolysis mass spectrometry with multivariate calibration and artificial neural networks. Biotechnol. Bioengin. 1994, 44,1205-1216. [Pg.124]

Goodacre, R. Edmonds, A. N. Kell, D. B. Quantitative analysis of the pyrolysis-mass spectra of complex mixtures using artificial neural networks Application to amino acids in glycogen. J. Anal. Appl. Pyrolysis 1993, 26, 93-114. [Pg.124]

Goodacre, R. Karim, A. Kaderbhai, M. A. Kell, D. B. Rapid and quantitative analysis of recombinant protein expression using pyrolysis mass spectrometry and artificial neural networks Application to mammalian cytochrome b5 in Escherichia coli. J. Biotechnol. 1994,34,185-193. [Pg.124]

Goodacre, R. Kell, D. B. Pyrolysis mass spectrometry and its applications in biotechnology. Curr. Opin. Biotechnol. 1996,7, 20-28. [Pg.252]

Goodacre, R. Shann, B. Gilbert, R. J. Timmis, E. M. McGovern, A. C. Alsberg, B. K. Kell, D. B. Logan, N. A. Detection of the dipicolinic acid biomarker in Bacillus spores using Curie-point pyrolysis mass spectrometry and fourier transform infrared spectroscopy Anal. Chem. 2000,72,119-127. [Pg.252]

DISCRIMINATION AND IDENTIFICATION OF MICROORGANISMS BY PYROLYSIS MASS SPECTROMETRY FROM BURNING AMBITIONS TO COOLING EMBERS—A HISTORICAL PERSPECTIVE... [Pg.319]

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