Results 121 to 130 of about 69,282 (166)

Subtracting the Raman Spectrum of Solvent for Quantitative Analysis

Journal of Raman Spectroscopy
ABSTRACT Raman spectroscopy is widely employed for quantitative analysis in aqueous solutions, yet it faces a notable challenge: the overlap of water Raman bands, often used as an internal standard, with analyte bands.
Fei Zhang, Kailin Sun, Yiming Jiang, Guoqing Jia, Fengtao Fan, Can Li   +5 more
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Theoretical analysis of the resonance Raman spectrum of tryptophan

Journal of Raman Spectroscopy, 1991
AbstractThe resonance Raman excitation profiles of tryptophan in the region 240‐200 nm were calculated, taking into account the molecular properties of its chromophore, indole. The relevant quantities such as state displacements and vibronic coupling terms were evaluated by means of quantum mechanical semi‐empirical methods.
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Structural analysis of molecules from their Raman spectrum

Journal of Molecular Structure, 1992
Abstract This article is devoted to the study of molecular structure from vibrational spectra. As an example, common methods are applied to solving the complicated problem of rotational isomerism in hydrocarbons. The problem of establishing a relation between the structure of complex molecules and their Raman spectra is discussed.
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Analysis and Explanation of Agglomeration Phenomenon Based on Raman Spectrum

Advanced Materials Research, 2015
In this paper, from the standpoint of Raman spectrum research aspect in material science, Raman spectrum analysis of graphite and diamond microcrystal retained by gallium phosphide nanoparticles is introduced. We found that molecular configuration of basic fuchsin adsorbed on gallium phosphide nanoparticles through experiments.
Hai Ling Li, Geng Xin Sun, Shui Qing Jiang, Sheng Bin   +3 more
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Analysis of the raman spectrum of single crystals of naphthalene

Proceedings of the Indian Academy of Sciences - Section A, 1942
The paper reports the results of an exhaustive study and evaluation of 24 spectrograms concerning the Raman effect in a single crystal of naphthalene recorded for various settings of the crystal with respect to the directions of incidence and observation, and also for various directions of vibration in the incident and scattered radiations.
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Model analysis of the Raman spectrum from fused silica optical fibers

Applied Optics, 1982
Abstract : The Raman spectrum from pure silica optical fibers has been analyzed into a set of Gaussian components. Each component used is related to an observed feature of the spectrum, and a residual of about 1% resulted without the use of additional components. Both single- and multi-phonon peaks were fitted.
G E, Walrafen, P N, Krishnan
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Experimental and theoretical analysis of the rotational Raman spectrum of hydrogen molecules in clathrate hydrates

The Journal of Chemical Physics, 2011
The Raman spectra of H2 and HD molecules in simple hydrogen and binary hydrogen-tetrahydrofuran clathrate hydrates have been measured at temperatures as low as 20 K. The rotational bands of trapped molecules in simple and binary hydrates have been analyzed, and the contributions originating from hydrogen molecules in the large cages have been separated
Alessandra Giannasi, Milva Celli, Marco Zoppi, Massimo Moraldi, Lorenzo Ulivi   +4 more
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Application of artificial neural network to quantitative analysis of Raman spectrum

SPIE Proceedings, 2006
By means of Artificial Neural Network and Back-Propagation algorithm, the multi-component of azo-dyes can be qualitatively and quantitatively analyzed simultaneously, though their Raman spectra are overlapped. This article designed a Back-Propagation algorithm network to analyze the multi-component of azo-dyes (Sudan I and Sudan III). In conclusion,
Chen Chen, Guoping Zhang, Gang Li
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Harmonic and anharmonic analysis of the IR and Raman spectrum of macrocyclic dioxopolyamine

Journal of Molecular Structure, 2014
Abstract A detailed analysis of the vibrational spectra of 8,8a,9,10,11,12,12a,13-octahydrodibenzo[b,h][1,4,7,10] dioxadiazacyclododecine-7,14 (6H,15H)-dione has been conducted in harmonic and anharmonic approximation. B3LYP and B3LYP-D3 functionals and 6-31G(d), 6-31+G(d,p) and TZVP basis set were employed.
Yujiao Wang, Xiaomei Xie, Huijuan Lu, Feifei Chen, Huihong Liu, Wei Li   +5 more
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[Laser Raman spectrum analysis of carbendazim pesticide].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
Raman signal of solid and liquid carbendazim pesticide was collected by laser Raman spectrometer. The acquired Raman spectrum signal of solid carbendazim was preprocessed by wavelet analysis method, and the optimal combination of wavelet denoising parameter was selected through mixed orthogonal test. The results showed that the best effect was got with
Xiao-bin, Wang, Rui-mei, Wu, Mu-hua, Liu, Lu-ling, Zhang, Lei, Lin, Lin-yuan, Yan   +5 more
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