Discrimination of selected species of pathogenic bacteria using near-infrared Raman spectroscopy and principal components analysis

2012 ◽  
Author(s):  
Fernanda S. de Siqueira e Oliveira ◽  
Hector E. Giana ◽  
Landulfo Silveira, Jr.
Keyword(s):  
Raman Spectroscopy ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Pathogenic Bacteria ◽  
Near Infrared ◽  
Components Analysis

scholarly journals Raman investigation of corrosion products on Roman copper-based artefacts

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 129
Author(s):  
Leila Es Sebar ◽  
Leonardo Iannucci ◽  
Yuval Goren ◽  
Peter Fabian ◽  
Emma Angelini ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Roman Period ◽  
Corrosion Products ◽  
Beer Sheva ◽  
Chemometric Technique ◽  
Components Analysis ◽  
Main Components

<p class="Abstract">This paper illustrates a case study related to the characterisation of corrosion products present on recently excavated artefacts. The archaeological findings, from the Rakafot 54 site (Beer-Sheva, Israel), consist of 23 coins and a pendant, all dating back to the Roman period. Raman spectroscopy was used to identify the corrosion products that compose the patina covering the objects. To facilitate and support their identification, spectra were then processed using principal components analysis. This chemometric technique allowed the identification of two main compounds, classified as atacamite and clinoatacamite, which formed the main components of the patinas. The results of this investigation can help in assessing the conservation state of artefacts and defining the correct restoration strategy.</p>

Diagnosis of atherosclerosis in human carotid artery by FT-Raman spectroscopy: Principal Components Analysis algorithm

2004 ◽  
Author(s):  
Grazielle V. Nogueira ◽  
Landulfo Silveira, Jr. ◽  
Airton A. Martin ◽  
Renato A. Zangaro ◽  
Marcos T. Pacheco ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Carotid Artery ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Analysis Algorithm ◽  
Ft Raman Spectroscopy ◽  
Components Analysis ◽  
Human Carotid ◽  
Ft Raman
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