Results 21 to 30 of about 307,616 (251)

Raman spectroscopic evaluation of human serum using metal plate and 785- and 1064-nm excitation lasers.

open access: yesPLoS ONE, 2019
In this study, we utilized a stainless steel (SUS304) plate for measuring the Raman scattering spectra of body fluid samples. Using this stainless steel plate, we recorded the Raman scattering spectra of 99.5% ethanol and human serum samples by ...
Hiroaki Ito   +4 more
doaj   +1 more source

Fermi energy dependence of first- and second-order Raman spectra in graphene: Kohn anomaly and quantum interference effect [PDF]

open access: yes, 2016
Intensity of the first- and the second-order Raman spectra are calculated as a function of the Fermi energy. We show that the Kohn anomaly effect, i.e., phonon frequency renormalization, in the first-order Raman spectra originates from the phonon ...
Dresselhaus, Mildred   +3 more
core   +2 more sources

Raman Imaging of Plant Cell Walls in Sections of Cucumis sativus

open access: yesPlants, 2018
Raman microspectra combine information on chemical composition of plant tissues with spatial information. The contributions from the building blocks of the cell walls in the Raman spectra of plant tissues can vary in the microscopic sub-structures of the
Ingrid Zeise   +5 more
doaj   +1 more source

Fused Raman spectroscopic analysis of blood and saliva delivers high accuracy for head and neck cancer diagnostics

open access: yesScientific Reports, 2022
As a rapid, label-free, non-destructive analytical measurement requiring little to no sample preparation, Raman spectroscopy shows great promise for liquid biopsy cancer detection and diagnosis.
Hanna J. Koster   +5 more
doaj   +1 more source

Effects of vinyl substitutions on resonance Raman spectra of (bacterio)chlorophylls [PDF]

open access: yes, 1994
Soret resonance and Qy preresonance Raman spectra are reported and compared for a series of (bacterio)chlorophylls. Chlorophyll a, 2-acetylchlorophyll a, bacteriochlorophyll a and 2-vinylbacteriochlorophyll a were studied in the non-protic solvent ...
Boldt   +23 more
core   +1 more source

Characterization of Coals and Coal Ashes with High Si Content Using Combined Second-Derivative Infrared Spectroscopy and Raman Spectroscopy

open access: yesCrystals, 2019
The organic and mineral components in two coals and resulting high-temperature ashes with high silicon content were characterized by second-derivative infrared spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD).
Yanshan Yin   +7 more
doaj   +1 more source

Raman Spectra Characteristics of Fluid Inclusion in the Shaanxi Formation of the Dingbian Area in the Ordos Basin

open access: yesYankuang ceshi, 2015
Raman Spectroscopy is an important means of non-destructive fluid inclusions analysis. Composition of fluid inclusions in quartz from the Shaanxi formation of the Dingbian area in the Ordos Basin was determined by the Raman technique.
LI Yan-xia, YAN Xin-yi, TIAN Yu-feng
doaj   +1 more source

Carbonisation of biomass-derived chars and the thermal reduction of a graphene oxide sample studied using Raman spectroscopy [PDF]

open access: yes, 2013
Chars and carbonised chars were produced from three different oxygen-rich precursors (Pinus radiata wood, Phormium tenax leaf fibres, and sucrose crystals).
Manley-Harris, Merilyn   +2 more
core   +2 more sources

Rapid identification of pathogenic bacteria using Raman spectroscopy and deep learning

open access: yesNature Communications, 2019
The use of Raman spectroscopy for pathogen identification is hampered by the weak Raman signal and phenotypic diversity of bacterial cells. Here the authors generate an extensive dataset of bacterial Raman spectra and apply deep learning to identify ...
Chi-Sing Ho   +9 more
doaj   +1 more source

An FT-Raman, FT-IR, and Quantum Chemical Investigation of Stanozolol and Oxandrolone

open access: yesBiosensors, 2017
We have studied the Fourier Transform Infrared (FT-IR) and the Fourier transform Raman (FT-Raman) spectra of stanozolol and oxandrolone, and we have performed quantum chemical calculations based on the density functional theory (DFT) with a B3LYP/6-31G ...
Tibebe Lemma   +3 more
doaj   +1 more source

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