The fluorescence background in Raman spectra of sound enamel

Building an ensemble learning model for gastric cancer cell line classification via rapid raman spectroscopy

“…In addition, five classification models reached an accuracy of 94.38% in the task of identifying gastric cancer cell lines using the background dataset. This result suggests that the Raman spectral background is biologically informative [22] .…”

“…In addition, in previous Raman spectroscopy studies, spectral baselines were removed in the spectral preprocessing stage using methods such as adaptive iteratively reweighted penalized least squares (airPLS) algorithm [19] , [20] , [21] . However, Tomasz et al speculated in the study that there is a correlation between the Raman baseline and the fluorescence background of the sample [22] . At present, no one has explored whether the baseline of Raman spectroscopy can be used for spectral analysis.…”

A zinc-containing porphyrin aluminum MOF in sorption of diethyl sulfide vapor: mechanistic experimental and computational study

“…In Fig. 11a, the “fluorescence background” in the Raman spectrum 47 is significant at ca. >2000 cm −1 .…”

Application of Unsupervised Multivariate Analysis Methods to Raman Spectroscopic Assessment of Human Dental Enamel

“…The increase in precision is further highlighted by the determination of the depolarization ratio (ρ959), revealing lower uncertainties when using the 785 nm laser (Table 1). The depolarization ratio is indicative of the soundness of teeth [12], presenting increased values for demineralized enamel [23,24]. Although the results obtained with both lasers are in agreement, samples S2 and S6 present higher depolarization ratio, while samples 3, 4 and 5 are more difficult to differentiate; the higher uncertainties rendered by measurements with the red laser would not allow to distinguish between sound and demineralized enamel with the main purpose of performing such an analysis.…”

“…Buchwald et al [4,9,11,12] have recently performed several research studies to investigate the effectiveness of Raman spectroscopy technique in the determination of changes in chemical composition, structural arrangement, crystal rod orientation and/or morphology of human tooth enamel affected by caries, both natural and artificially induced. This has been accomplished by evaluating spectral parameters such as Raman band position, peak intensities obtained by using different excitation laser wavelengths, the full width at half maximum of the symmetric stretching vibrational mode assigned to the phosphate band [4].…”