scholarly journals Possibility of Raman spectroscopy method use for evaluation of periodontitis-affected tooth enamel before and after open curettage

2021 ◽  
Vol 2103 (1) ◽  
pp. 012055
Author(s):  
P E Timchenko ◽  
E V Timchenko ◽  
I V Bazhutova ◽  
O O Frolov ◽  
L T Volova ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Mineral Composition ◽  
Raman Spectra ◽  
Evaluation Method ◽  
Tooth Enamel ◽  
Organic Matrix ◽  
Chemometric Analysis ◽  
Spectroscopy Method ◽  
Spectral Changes ◽  
Before And After

Abstract The results of the research of enamel of periodontitis-affected teeth before and after open curettage are presented in the work. The Raman spectroscopy method was used as an evaluation method of curettage influence on tooth enamel. Chemometric analysis of the Raman spectra of tooth enamel before and after curettage was made. Spectral changes of tooth enamel were detected. It was found that after the procedure of open curettage spectral changes occur in tooth enamel related to the changes in mineral composition and organic matrix forming.

scholarly journals Raman Spectroscopy of Changes in the Tissues of Teeth with Periodontitis

Diagnostics ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 876
Author(s):  
Elena Timchenko ◽  
Pavel Timchenko ◽  
Larisa Volova ◽  
Oleg Frolov ◽  
Maksim Zibin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spectral Properties ◽  
Tooth Enamel ◽  
Experimental Studies ◽  
Spectroscopy Method ◽  
Noninvasive Diagnosis ◽  
Dental Practice ◽  
Spectral Changes

The results of experimental studies of the tissues of teeth with periodontitis, using the Raman spectroscopy method, are presented in this work. Spectral changes in the tissues of teeth with periodontitis were identified, and the results can be used for the correction of treatment of this disease in dental practice. Criteria for the noninvasive diagnosis of periodontitis, based on changes in tooth enamel spectral properties, were developed.

scholarly journals The raman spectroscopy method for evaluation of structural changes in hard tissues of teeth after in-office whitening

2021 ◽  
Vol 2103 (1) ◽  
pp. 012161
Author(s):  
E V Timchenko ◽  
P E Timchenko ◽  
O O Frolov ◽  
O A Magsumova ◽  
L T Volova ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structural Changes ◽  
Tooth Enamel ◽  
Spectroscopy Method ◽  
Hard Tissues ◽  
Before And After ◽  
Whitening Process ◽  
Mineral Components

Abstract Start The experiments in evaluation of hard tissues using the Raman spectroscopy method have been made. Spectral differences between the tooth enamel and dentin before and after the in-office whitening procedure were found as a result of the work. It was shown with the use of the Raman spectroscopy method that the whitening process causes changes of tooth enamel and dentin related to the changes of organic and mineral components.

Evidence of Electrochemical Graphene Functionalization by Raman Spectroscopy

2012 ◽  
Vol 717-720 ◽  
pp. 661-664 ◽  
Author(s):  
Kevin M. Daniels ◽  
Biplob K. Daas ◽  
Nishtha Srivastava ◽  
Christopher Williams ◽  
Randall M. Feenstra ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Electrochemical Cell ◽  
Epitaxial Graphene ◽  
Ratio Increase ◽  
Dependent Effect ◽  
Before And After ◽  
Graphene Functionalization ◽  
G Ratio ◽  
Bond Peak

Electrochemical functionalization of treated epitaxial graphene samples on Si-face 6H-SiC are presented in this work. Three semi-insulating 6H-SiC substrates cut from different boules with varying off cut angle (on axis, 0.5° and 1.0° degrees off axis in the [112‾0] direction) were diced into 10mm x 10mm samples and quality EG grown on top. A home-build electrochemical cell was used with current applied though a 10% H2SO4 solution, with a Pt wire and exposed graphene as the anode and cathode respectively. Functionalization was determined using Raman spectroscopy and measured by an increase in D/G ratio, increase in fluorescence background and introduction of C-H bond peak at ~2930 cm-1. Components of the Raman spectra before and after functionalization of all samples used were analyzed to show a substrate dependent effect on functionalization with values such as D/G ratio and normalized fluorescence slope varying between the substrates.

scholarly journals Raman Spectroscopy for Assessment of Hard Dental Tissues in Periodontitis Treatment

Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1595
Author(s):  
Elena V. Timchenko ◽  
Irina V. Bazhutova ◽  
Oleg О. Frolov ◽  
Larisa Т. Volova ◽  
Pavel Е. Timchenko
Keyword(s):  
Raman Spectroscopy ◽  
Dental Plaque ◽  
Tissue Repair ◽  
Plaque Formation ◽  
Discriminant Model ◽  
Dental Tissues ◽  
Spectral Changes ◽  
Dental Procedures ◽  
Before And After ◽  
Hard Dental Tissues

The objective of this work was to use Raman spectroscopy to assess hard dental tissues after professional oral hygiene treatment and curettage. Spectral changes were identified, and the discriminant model of the specific changes of intensity of the Raman lines (i.e., of dentin, cementum, and enamel), before and after the dental procedures, was developed. This model showed that 6 weeks after the procedures, the hard dental tissues did not have differences and, thus, provided similar conditions for bio-film and dental plaque formation, tissue repair, and new attachment to the surface of the root.

The Effect of Post-Anodization Chemical Etching on Porous Silicon Investigated by Means of Photoluminescence and Ir Spectroscopy

1999 ◽  
Vol 560 ◽  
Author(s):  
Nobutomo Uehara ◽  
Tetsuya Yamazaki ◽  
Akiharu Kobayashi ◽  
Shinji Fujihara ◽  
Masato Ohmukai ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Porous Silicon ◽  
Ir Spectroscopy ◽  
Raman Spectra ◽  
Chemical Etching ◽  
Close Relation ◽  
Pl Spectra ◽  
Spectral Changes ◽  
Pl Emission

ABSTRACTWe studied the effect of post-anodization chemical etching on porous silicon by means of photoluminescence (PL), Fourier transform infrared (FTIR) absorption and Raman spectroscopy. We performed these measurements with repeating etching and then observed the variation of the spectra. On the basis of the correlation between PL and FTIR spectral changes, the PL emission at 660 and 730 nm in PL spectra stems from Si-H2, and Si-H clusters at surface, respectively. Raman spectra show a close relation between PL emission at 850 nm and nanocrystallites in porous silicon. In addition, chemical etching contributes to the promotion of nanocrystallites and to dissolving them.

Submicron Simultaneous IR and Raman Spectroscopy (IR+Raman): Breakthrough Developments in Optical Photothermal IR (O-PTIR) Combined for Enhanced Failure Analysis

2019 ◽  
Author(s):  
Jay Anderson ◽  
Mustafa Kansiz ◽  
Michael Lo ◽  
Curtis Marcott
Keyword(s):  
Raman Spectroscopy ◽  
Failure Analysis ◽  
Data Quality ◽  
Raman Spectra ◽  
Spatial Resolution ◽  
Far Field ◽  
Field Mode ◽  
Microscopic Scale ◽  
Analytical Tools ◽  
Ir And Raman

Abstract Failure analysis of organics at the microscopic scale is an increasingly important requirement, with traditional analytical tools such as FTIR and Raman microscopy, having significant limitations in either spatial resolution or data quality. We introduce here a new method of obtaining Infrared microspectroscopic information, at the submicron level in reflection (far-field) mode, called Optical-Photothermal Infrared (O-PTIR) spectroscopy, that can also generate simultaneous Raman spectra, from the same spot, at the same time and with the same spatial resolution. This novel combination of these two correlative techniques can be considered to be complimentary and confirmatory, in which the IR confirms the Raman result and vice-versa, to yield more accurate and therefore more confident organic unknowns analysis.

scholarly journals Quantitative and Qualitative Analysis of Some Inorganic Compounds by Raman Spectroscopy

1994 ◽  
Vol 48 (7) ◽  
pp. 875-883 ◽  
Author(s):  
Daniel R. Lombardi ◽  
Chao Wang ◽  
Bin Sun ◽  
Augustus W. Fountain ◽  
Thomas J. Vickers ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Raman Spectra ◽  
Solid Phase ◽  
Inorganic Compounds ◽  
Core Material ◽  
Storage Tanks ◽  
Hanford Site ◽  
Sampling Probe

Raman spectra have been measured for a number of nitrates, nitrites, sulfates, ferrocyanides, and ferricyanides, both in the solid phase and in aqueous solution. Accurate locations of peak maxima are given. Limits of detection for some of the compounds are given for solutions and for solid mixtures in NaNO3. Preliminary measurements have been made on core material recovered from the storage tanks on the Hanford site in Richland, Washington. Representative spectra are presented, showing that it is possible to observe responses of individual components from measurements made directly on untreated cores, with the use of a fiberoptic sampling probe.

scholarly journals Indication of high lipid content in epithelial-mesenchymal transitions of breast tissues

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Siti Norbaini Sabtu ◽  
S. F. Abdul Sani ◽  
L. M. Looi ◽  
S. F. Chiew ◽  
Dharini Pathmanathan ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Raman Spectroscopy ◽  
Multivariate Analysis ◽  
Nucleic Acids ◽  
Raman Spectra ◽  
Cancer Progression ◽  
Component Analysis ◽  
Breast Cancer Tissue ◽  
Metabolic Changes ◽  
Cancer Tissue

AbstractThe epithelial-mesenchymal transition (EMT) is a crucial process in cancer progression and metastasis. Study of metabolic changes during the EMT process is important in seeking to understand the biochemical changes associated with cancer progression, not least in scoping for therapeutic strategies aimed at targeting EMT. Due to the potential for high sensitivity and specificity, Raman spectroscopy was used here to study the metabolic changes associated with EMT in human breast cancer tissue. For Raman spectroscopy measurements, tissue from 23 patients were collected, comprising non-lesional, EMT and non-EMT formalin-fixed and paraffin embedded breast cancer samples. Analysis was made in the fingerprint Raman spectra region (600–1800 cm−1) best associated with cancer progression biochemical changes in lipid, protein and nucleic acids. The ANOVA test followed by the Tukey’s multiple comparisons test were conducted to see if there existed differences between non-lesional, EMT and non-EMT breast tissue for Raman spectroscopy measurements. Results revealed that significant differences were evident in terms of intensity between the non-lesional and EMT samples, as well as the EMT and non-EMT samples. Multivariate analysis involving independent component analysis, Principal component analysis and non-negative least square were used to analyse the Raman spectra data. The results show significant differences between EMT and non-EMT cancers in lipid, protein, and nucleic acids. This study demonstrated the capability of Raman spectroscopy supported by multivariate analysis in analysing metabolic changes in EMT breast cancer tissue.

Application of Raman spectroscopy method for analysis of biopolymer materials

2016 ◽  
Author(s):  
Elena V. Timchenko ◽  
Pavel E. Timchenko ◽  
S. E. Volchkov ◽  
Alexsandra O. Mahortova ◽  
Anna A. Asadova ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopy Method
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