In this study we measured spectral features of blood and urine by Raman spectroscopy and autofluorescence analysis. Analysis of specific spectra allows for identification of informative spectral bands proportional to components whose content is associated with body fluids homeostasis changes at various pathological conditions. In general, the developed approach of body fluids analysis provides ...

The Raman spectrum (441.6 nm excitation) of protocatechuate 3,4dioxygenase (PCD) from Pseudmionas putida shows resonance enhanced bands at 1605, 1504, 1270, 858, and 830 cm-1 which are due to the p-hydroxyphenyl group of tyrosine coordinated to iron. In addition, we observe strong resonance enhanced bands at 592 and 524 cm-' and weak (presumably iron1igand)vibrations at 465, 423, and 371 cm-l. ...

This paper explores the characterization of Kevlar composite materials using Raman spectroscopy. The goal of the research is to develop and understand the Raman spectrum of Kevlar materials to provide a foundation for the development of nondestructive evaluation (NDE) technologies based on the interaction of laser light with the polymer Kevlar. The paper discusses the fundamental aspects of exp...

Introduction: Micro-Raman spectroscopy is one of the primary methods of mineralogical analysis in the laboratory, and more recently in the field. Because of its versatility and ability to interrogate rocks in their natural form (Figure 1), it is one of the frontrunners for the next generation of in situ instruments designed to explore adiverse set of solar system bodies (e.g. Mars, Venus, the M...

Real-time detection and identification of explosives at a standoff distance is a major issue in efforts to develop defense against so-called improvised explosive devices (IED). It is recognized that the only method, which is potentially capable to standoff detection of minimal amounts of explosives is laser-based spectroscopy. LDS technique belongs to trace detection, namely to its micro-partic...

Recent results of Raman spectroscopy studies of lattice dynamics and phase transitions in ferroelectric thin films and superlattices are reviewed. Raman studies of SrTiO3, BaTiO3, and BaxSr1−xTiO3 thin films in comparison to corresponding single crystals are presented; essential differences in the lattice dynamics behavior of thin films and single crystals are discussed. Application of ultravio...

\Ye have applied Coherent Anti-Stokes Raman Spectroscopy (CARS) for monitoring of a variety of important molecules in combustion media. A survey of different CARS techniques ranging from simple, scanning measurements of major species like N , to single-pulse, broad-band arraydetector registration of less abundant species is made. The CARS, BOXCARS and folded BOXCARS approaches were used observi...

The combination of optical trapping with Raman spectroscopy provides a powerful method for the study, characterization, and identification of biological micro-particles. In essence, optical trapping helps to overcome the limitation imposed by the relative inefficiency of the Raman scattering process. This allows Raman spectroscopy to be applied to individual biological particles in air and in l...

In this report we address the problem of skin fluorescence in feature extraction from Raman spectra of skin lesions. We apply a highly automated neural network method for suppressing skin fluorescence from Raman spectrum of skin lesions before dimension reduction with principal components analysis. By applying the background suppression, the effect of outlier spectrum in the principal component...