Showing papers in "Vibrational Spectroscopy in 2011"

TL;DR: In this article, the authors reviewed the recent advances in Raman spectroscopy and its new trend of applications ranging from ancient archaeology to advanced nanotechnology, including the aspects of Raman measurements to the analysis of various substances categorized into distinct application areas such as biotechnology, mineralogy, environmental monitoring, food and beverages, forensic science, medical and clinical chemistry, diagnostics, pharmaceutical, material science, surface analysis etc.

TL;DR: In this article, the authors demonstrated the capability of VIS Raman spectroscopy in combination with partial least square regression (PLS) as a rapid technique for direct milk fat determination.

TL;DR: In this paper, a systematic approach was presented to examine the dislocations in hemp fibres firstly by optical microscopy and field emission scanning electron microscopy (FE-SEM), and then by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) for the crystallinity index and hydrogen bonds.

TL;DR: In this article, the authors compared results obtained with several chemometric methods: SIMCA, PLS2-DA, PSL1-DA with SIMCA and PSL2DA with PSL 1-DA in two infrared spectroscopic applications.

TL;DR: In this paper, the nonlinear susceptibility of the investigated molecule induced by pump and Stokes laser beams employed in the CARS technique is discussed, and the relation between the non-linear susceptibility, the different CARS laser intensities and the phase matching condition between them is also presented.

TL;DR: In this paper, a correlation between vibrational frequency shifts and intercalated metal was found, thus showing that vibrational spectroscopy is very useful for probing metal-intercalated titanate nanotubes.

TL;DR: In this article, the authors examined the cation-anion-water interactions in aqueous mixtures of imidazolium ionic liquids (ILs) over the whole composition range using FTIR spectroscopy.

TL;DR: In this article, the authors applied near-infrared spectroscopy (NIRS) for direct and rapid collection of characteristic spectra from Rhizoma Corydalis, a common traditional Chinese medicine (TCM), with the aim of developing a method for the classification of such substances according to their geographical origin.

TL;DR: In this paper, the crystal and molecular structure of a polymeric Cu(II)-orotate complex, [Cu(μ-HOr)(H 2 O) 2 ] n, has been reinvestigated by single crystal X-ray diffraction.

TL;DR: In this paper, the authors used non-destructive techniques (Raman, ATR-FTIR and SEM/EDS) to distinguish between parchment manufacturing procedures, western with lime and eastern with enzymatic treatment.

TL;DR: In this article, a rapid near infrared spectroscopy analysis method was developed for the geographical origin discrimination and content determination of Radix scutellariae, a kind of Traditional Chinese Medicine (TCM).

TL;DR: In this article, vertex component analysis (VCA) was applied to Raman and Fourier transform infrared (FTIR) images of liver tissue sections and the results were compared with K-means cluster analysis, fuzzy C-mean cluster analysis and principal component analysis.

TL;DR: In this study, FTIR-ATR was used to detect the presence of known adulterants intentionally spiked into dietary ingredients, including erectile dysfunction drugs, steroids, weight loss drugs and Melamine.

TL;DR: In this article, the effect of sampling techniques on IR spectra of polycrystalline WO 3 hydrates and polymorphs has been demonstrated and the phase transition into triclinic polymorph (C 5 2h ǫ → C 1 i ) has been revealed for the sample of monoclinic WO3 prepared as KBr pellet.

TL;DR: In this paper, Fourier transform infrared (FTIR) spectroscopy using horizontal attenuated total reflectance (HATR) was developed for detection and quantification of these vegetable oils as adulterants in cod liver oil.

TL;DR: In this paper, the infrared absorption spectra of 55 lactic acid bacteria belonging to the genera Lactobacillus, Weissella and Carnobacterium were obtained and mathematically analyzed.

TL;DR: In this article, the authors used near-infrared (NIR) spectroscopy and perturbation-correlation moving-window two-dimensional correlation (PCMW-2DCS) to investigate the penetration rate of water into a tablet and the interaction between water and a pharmaceutical excipient.

TL;DR: In this article, surface enhancement in combination with coherent anti-Stokes Raman scattering (CARS) using femtosecond laser pulses was performed on these molecular systems in the presence and absence of silver colloids.

TL;DR: In this paper, a methodology for the classification and determination of total protein in milk powder using near infrared reflectance spectrometry (NIRS) and variable selection was proposed.

TL;DR: The potential of near infrared (NIR) spectroscopy in characterization of organically modified clay minerals is introduced in this paper, where the effect of larger alkylammonium cations on the vibrations of Si-O and OH bonds in montmorillonite layers is observed.

TL;DR: In this article, the theoretical structures of l -tyrosine in both gas phase and in aqueous solution were studied and the changes that occurred on the structural and vibrational properties in two phases.

TL;DR: In this article, the authors used Raman microspectroscopy to detect carotenoids at the subcellular level by using single crystals sequestered in a carrot cell and measured using FT-Raman spectrometer equipped with a microscope and 40× objective.

TL;DR: In this article, the surface-enhanced Raman scattering (SERS) was used to detect small temporal changes in the surface morphology of Ag/TiO 2 nanotube/Ti composites.

TL;DR: In this paper, a quick and reliable analytical method for the quantitative assessment of roxithromycin in pharmaceutical formulations was developed using Fourier-transform infrared (FT-IR) transmission spectroscopy for routine quality control.

TL;DR: In this paper, the authors explored the feasibility of vibrational spectroscopy in tandem with chemometric methods as a rapid and low-cost alternative quality control method for rose-scented geranium oil.

TL;DR: In this paper, Fourier transform infrared spectroscopy (FTIR) was applied on the mesocarp of the fresh olives without any preliminary treatment and the spectral data were pre-treated by derivative elaboration based on the Savitzky-Golay algorithm to reduce noise and increase analytical information.

TL;DR: In this article, the molecular structures, natural atomic charges and theoretical anharmonic Raman and infrared spectra of the three fluoroaniline isomers have been calculated by using the density functional B3LYP method with the extended 6-311++G(df,pd) basis set.

TL;DR: The Hartree-Fock component of ACM1 hybrid functionals should be 1/6 instead of 1/4 for a wide range of silicate structures, for which high-quality Raman spectra have been published as mentioned in this paper.

TL;DR: In this article, the cofactors of FAD and FMN were investigated in aqueous medium by Fourier transform infrared spectroscopy, and the absorption spectra in the range of 920-1800 cm−1 were determined after accurate subtraction of the contributions from the water vibrations.

TL;DR: A normal coordinate analysis has been made to investigate the Raman and the infrared wavenumbers in ABi 2 Nb 2 O 9 (ABN) having space group A 2 1 am (No. 36, C 2 v 12 ) as mentioned in this paper.