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- W2000573299 abstract "Chromophore identification in biological samples often requires the physical separation of the compounds, which can be difficult. Although there are several advantages to hyphenated spectroscopic techniques for identification of substances, complex mixtures of chromophores presenting overlapped spectra cannot be identified directly through this method. This work presents an application of chemometrics to compound identification in biological samples by a spectroscopic hyphenated technique using a curve resolution method. The PARAllel FACtor analysis model (PARAFAC), which has no rotational indeterminacy, was used for curve resolution of excitation-emission spectra of human dental tartars. PARAFAC was applied under constraints (i.e., unimodality and non-negativity) and evaluated with a validation procedure. The resolved profiles are porphyrinic-like spectra presenting excitation band maxima at 407, 416, and 431 nm in the Soret band region (390–440 nm) of these substances." @default.
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- W2000573299 date "2001-07-01" @default.
- W2000573299 modified "2023-10-14" @default.
- W2000573299 title "PARAFAC for Spectral Curve Resolution: A Case Study Using Total Luminescence in Human Dental Tartar" @default.
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- W2000573299 doi "https://doi.org/10.1366/0003702011952875" @default.
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