We present mid-infrared spectra of T Tauri stars in the Taurus star-forming region obtained with the Spitzer Infrared Spectrograph (IRS). For the first time, the 5–36 μm spectra of a large sample of T Tauri stars belonging to the same star-forming region is studied, revealing details of the midinfrared excess due to dust in circumstellar disks. We analyze common features and differences in the ...

Recent investigations give an optimistic view that infrared absorption spectra can be very useful in the rapid identification and differentiation of microorganisms. However, it is admitted that such identifications will have to be based on very small differences, often not much above the reproducibility with which the spectra can be measured. Blout and Lenormant (1953) compared the spectra of L...

Efforts to demonstrate species or generic relationships among bacteria throu-h the use of infrared (IR) spectra of whole cells (Norris, J. Hyg. 57:326, 1959) have been increasing despite frequent cautions (Kenner et al., J. B3acteriol. 75:16, 1958) that such procedures are fraught with experimental pitfalls. AIany of the reports concerning bacterial identification by this technique are favorabl...

The noise of near-infrared spectra and spectral information redundancy can affect the accuracy of calibration and prediction models in near-infrared analytical technology. To address this problem, the improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) and permutation entropy (PE) were used to propose a new method for pretreatment and wavelength selection of ne...