Determination of water speciation in hydrous haplogranitic glasses with partial Raman spectra

2020 ◽  
Vol 553 ◽  
pp. 119793
Author(s):  
Christoph Helo ◽  
Jonathan M. Castro ◽  
Kai-Uwe Hess ◽  
Donald B. Dingwell
Keyword(s):  
Raman Spectra ◽  
Water Speciation

scholarly journals Possibility of Human Gender Recognition Using Raman Spectra of Teeth

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3983
Author(s):  
Ozren Gamulin ◽  
Marko Škrabić ◽  
Kristina Serec ◽  
Matej Par ◽  
Marija Baković ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Principal Component ◽  
Support Vector ◽  
Gender Recognition ◽  
Proof Of Concept ◽  
Male And Female ◽  
Tooth Type ◽  
Tooth Apex ◽  
The Difference

Gender determination of the human remains can be very challenging, especially in the case of incomplete ones. Herein, we report a proof-of-concept experiment where the possibility of gender recognition using Raman spectroscopy of teeth is investigated. Raman spectra were recorded from male and female molars and premolars on two distinct sites, tooth apex and anatomical neck. Recorded spectra were sorted into suitable datasets and initially analyzed with principal component analysis, which showed a distinction between spectra of male and female teeth. Then, reduced datasets with scores of the first 20 principal components were formed and two classification algorithms, support vector machine and artificial neural networks, were applied to form classification models for gender recognition. The obtained results showed that gender recognition with Raman spectra of teeth is possible but strongly depends both on the tooth type and spectrum recording site. The difference in classification accuracy between different tooth types and recording sites are discussed in terms of the molecular structure difference caused by the influence of masticatory loading or gender-dependent life events.

Determination of the structure of some tetrachloropropenes by means of Raman spectra

2010 ◽  
Vol 65 (3) ◽  
pp. 165-167 ◽  
Author(s):  
H. Gerding ◽  
H. J. Prins ◽  
G. W. A. Rijnders
Keyword(s):  
Raman Spectra

scholarly journals Revisiting water speciation in hydrous alumino-silicate glasses: A discrepancy between solid-state 1H NMR and NIR spectroscopy in the determination of X-OH and H2O

2020 ◽  
Vol 285 ◽  
pp. 150-174 ◽  
Author(s):  
George D. Cody ◽  
Michael Ackerson ◽  
Carolyn Beaumont ◽  
Dionysis Foustoukos ◽  
Charles Le Losq ◽  
...  
Keyword(s):  
Solid State ◽  
1H Nmr ◽  
Nir Spectroscopy ◽  
Silicate Glasses ◽  
Alumino Silicate ◽  
Water Speciation
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