• The excited state structural dynamics of phenyl isothiocyanate (PITC) after excitation to the light absorbing S{sub 2}(A′), S{sub 6}(A′), and S{sub 7}(A′) excited states were studied by using the resonance Raman spectroscopy and complete active space self-consistent field method calculations. (osti.gov)
  • The proposed research evaluates tissue oxygenation (StO2) as measured by resonance raman spectroscopy (RRS) in premature infants with and without patent ductus arteriosus (PDA). (bioportfolio.com)
  • 1974, Experientia, vol. 30, pages 481-83, combined fluorescence and Raman spectra of plasma samples from healthy human subjects and from patients suffering from a variety of organic diseases including non-malignancy as well as malignanacy diseases. (google.com)
  • Fluorescence and Raman samples were observed directly on the pollen surfaces after the particles were deposited on aluminum-coated slides. (photonics.com)
  • Joint probabilistic analysis of risk for aquatic species and exceedence frequency for the agricultural use of chlorpyrifos in the Pampean region, Argentina. (bioportfolio.com)
  • We describe the concept of effective conjugation length, and its relationship to the S 0 → S 2 electronic transition, the decay rate of the S 1 energetic level and the frequency of the ν 1 Raman band. (royalsocietypublishing.org)
  • If matter is irradiated with light at a precisely defined frequency, some of the photons of this light interact with the molecules of the matter, which thereby shifts the photons' own energy spectrum. (eurekalert.org)
  • You can also optionally choose a column for Frequency/Wavelength , which will be used for labels in Loading Plot , choose Spectra Names for labels in Scor Plot , and Group Info can be used to divide samples in Score Plot . (originlab.com)
  • We then used high-performance liquid chromatography and Raman spectroscopy to chemically assess the family-level distribution of plumage carotenoids, confirming their presence in 95 of 236 extant bird families (only 36 family-level occurrences had been confirmed previously). (royalsocietypublishing.org)
  • The Raman effect is based on the interaction between the electron cloud of a sample and the external electrical field of the monochromatic light, which can create an induced dipole moment within the molecule based on its polarizability. (wikipedia.org)
  • In addition, applying laser radiation allowed online detection of the Raman spectra providing thereby the capabilities to monitor the temperature, partial volume, and nanocrystal sizes in nc-Si composite during its formation and showing the possibility to control efficiently the crystallization process by varying the intensity and irradiation time of laser light. (hindawi.com)
  • A compilation of papers showcasing the latest discoveries and developments in the analysis and detection of food fraud, contamination, adulteration and spoilage. (rsc.org)
  • Hepcidin Detection by Affinity Based Sensing: a Possible Application in Clinical and Anti-Doping Analysis. (powells.com)
  • This review provides an overview of the theory of Raman spectroscopy, instrumentation used for measurement, and variation of Raman spectroscopic techniques for clinical applications in cancer, including detection of brain, ovarian, breast, prostate, and pancreatic cancers and circulating tumor cells. (springer.com)
  • To develop and endoscopic Raman spectroscopy probe for delivery down and channel in an endoscope to make near instant assessments of the condition of the oesophagus without the need for ex. (bioportfolio.com)
  • Both Raman and infrared (IR) spectroscopy probe molecular vibrations associated with chemical bonds in a sample to obtain information on molecular structure, composition, and intermolecular interactions. (springer.com)
  • Detecting biochemical changes in the rodent cervix during pregnancy using Raman spectroscopy. (biomedsearch.com)
  • Biochemical fractionation revealed that astrocytes may be converted into harmful cells by the inflammatory EV cargo, as indicated by immunohistochemical and qPCR analyses, whereas surface lipid components of EVs promote OPC migration and/or differentiation, linking EV lipids to myelin repair. (springer.com)
  • Recently, this technique has proved to be very useful within the biomedical imaging sector for label-free, biochemical analyses of cells, tissue and biofluids. (photonics.com)
  • in vitro analysis is a more realistic situation than biochemical assays carried out with purified biomolecules in a test tube 11 . (nature.com)
  • The resulting Raman spectra contained sufficient biochemical information to distinguish between profiles induced by individual antibiotics belonging to the same class. (asm.org)
  • We used SilviScan analysis and tracheid measurement to evaluate the effect of suppressed growth on the fundamental properties of wood fiber. (usda.gov)
  • The RAM II provides the ideal FT-Raman measurement. (azooptics.com)
  • Cell biologists at IGB use a specially developed Raman spectroscope jointly designed and built with physicists at the Fraunhofer Institute for Physical Measurement Techniques IPM in Freiburg, Germany. (eurekalert.org)
  • In this paper we will describe the instrumental basis for the measurement of VCD and ROA and discuss the potential of vibrational optical activity for applications in process analysis. (spie.org)
  • On-line measurement of fat, water, protein, colour and colour defects by NIR andVIS spectroscopy and imaging · Determination of connective tissue in meat and fish by fluorescence spectroscopy · Raman spectroscopy on biomaterials - how to cope with background fluorescence At our institute I am a principal researcher and project manager for one of ten basic research projects: Effective assessment of food quality by rapid spectroscopic and sensor techniques (Strategic institute project). (nofima.no)
  • In this research, E. coli cultures were subjected to three times the MICs of 15 different antibiotics (representing five functional antibiotic classes) with known mechanisms of action for 30 min before being analyzed by Raman spectroscopy (using a 532-nm excitation wavelength). (asm.org)
  • Were it not for the problem of photoluminescence, only one laser excitation wavelength would be necessary to perform Raman spectroscopy. (horiba.com)
  • Discriminant analysis by partial least squares, the commercial samples were classified correctly, since the samples with 1 and 2% w/w whey samples were classified as unadulterated. (ibict.br)
  • The collected spectral data were used to build a discriminant analysis model that identified the effects of unknown antibiotic compounds on the phenotype of E. coli cultures. (asm.org)
  • Resonance Raman spectra of polymer chains in the single crystals of the diacetylenes FBS (2,4-hexadiynylene-di-p-fluorobenzene sulfonate), TS/FBS [6-(p-toluenesulfonyloxy)-2,4-p-fluorobenzene sulfonate] and TS6 (2,4-hexadiynylene-di-p-toluene sulfonate) are described theoretically by means of a Franckâ€"Condon model, which considers a chain length dependence. (ebscohost.com)
  • The phase transitions were identified using the Raman and IR splitting modes and the appearance or disappearance of peaks, which clearly corresponded to the changes in the frequencies of the modes as the pressure changed. (bioportfolio.com)
  • We have recently started applying a new approach to lignin analysis - namely using nano- and micro-particles of silver for study of native and residual. (usda.gov)
  • Neste trabalho, a espectroscopia FT-Raman foi explorada como técnica rápida para avaliação da qualidade do leite em pó e leite condensado. (ibict.br)
  • A análise exploratória empregando os dados da espectroscopia Raman e a análise por componentes principais (PCA) permitiu a separação das amostras de leite em pó. (ibict.br)
  • As modificações que ocorrem no leite em pó com o tempo de armazenamento foram acompanhadas pela espectroscopia Raman, as mudanças observadas nos espectros indicam a cristalização da lactose como a principal alteração do leite armazenado. (ibict.br)
  • O trabalho desenvolvido mostra a espectroscopia Raman como uma ferramenta analítica que pode ser utilizada no controle de qualidade do leite em pó e de leite condensado. (ibict.br)
  • The origins of SIFT created to study interstellar chemistry and SIFT-MS developed for ambient gas and exhaled breath analysis and the UK centres in which these techniques are being exploited. (rsc.org)
  • M. N. Shashikala, N. Chandrabhas, K. Jayaram, A. Jayaraman and A. K. Sood, High Pressure Raman Spectroscopic Study of LiCsSO4: Pressure-Induced Phase Transitions and Amorphization, Journal of Physics and Chemistry of Solids 55 , 107 - 112 (1994). (jncasr.ac.in)
  • The polarized reflection spectra of single crystals of PDA-CPDO [poly-1-(N-carbazolyl)penta-1, 3-diyn-5-ol], which are Ï€ conjugated between the side groups and the main chain, have been measured in the photon energy region from 1.38 to 32 eV for the first time with a polarized synchrotron. (ebscohost.com)
  • Additional topics include basic instrumental components and sampling techniques, quantitative analysis, Raman polarization data, infrared gas contours, and polarized IR studies, among others. (okian.ro)
  • We are able to describe the Raman excitation profiles as well as the Raman band profiles for two Raman active modes, i.e., the C+C-, and the C 3/4 C-stretching vibrations of the polymer chains. (ebscohost.com)
  • Changes of position and Raman band profile as well as of the strength of the Fermi resonance can be explained by the enhancement of modes belonging to polymer chains having different chain lengths. (ebscohost.com)
  • Goodman, Paul A, "The Electrochemical Analysis of Bovine Bone Derived Supercapacitors, Organic Peroxide Explosives, and Conducting Polymer Nanojunctions" (2013). (unl.edu)
  • For example, thermal analysis paired with gas chromatography and mass spectrometry is employed to determine the quantity and types of plastic particles and additives that might be present. (news-medical.net)
  • N. Chandrabhas, A. K. Sood, D.V.S Muthu, C. S. Sundar, A. Bharathi, Y. Hariharan and C. N. R. Rao, Pressure-induced Amorphization in solid C70 : Raman and Photoluminescence Study, Physical Review Letters 73 , 3411 - 3414 (1994). (jncasr.ac.in)
  • A. K. Sood, N. Chandrabhas, D. V. S. Muthu, Y. Hariharan, A. Bharathi and C. S. Sunder, Pressure-induced Band gap Reduction, Orientational Phase Transition and Re- versible Amorphization in C70 Crystals: Photoluminescence and Raman Study, Philosophical Magazine B 70 , 347 - 358 (1994). (jncasr.ac.in)
  • Controlling the orientation of the laser and Raman polarization relative to the sample orientation can provide a wealth of information in the Raman spectrum that would be difficult to achieve by other methods. (horiba.com)
  • This column is going to explain what instrumental components affect the polarization effects that are observed, and how the sample setup itself affects the Raman signal. (horiba.com)