Combination of Laser-Induced Breakdown Spectroscopy and Raman spectroscopy for multivariate classification of bacteria

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU125772" target="_blank" >RIV/00216305:26620/17:PU125772 - isvavai.cz</a>

Alternative codes found

RIV/68081731:_____/18:00489532 RIV/00216224:14110/18:00102429

Result on the web

<a href="https://doi.org/10.1016/j.sab.2017.11.004" target="_blank" >https://doi.org/10.1016/j.sab.2017.11.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sab.2017.11.004" target="_blank" >10.1016/j.sab.2017.11.004</a>

Result language

angličtina

Original language name

Combination of Laser-Induced Breakdown Spectroscopy and Raman spectroscopy for multivariate classification of bacteria

Original language description

In this work, we investigate the impact of data provided by complementary laser-based spectroscopic methods on multivariate classification accuracy. Discrimination and classification of five Staphylococcus bacterial strains and one strain of Escherichia coli is presented. The technique that we used for measurements is a combination of Raman spectroscopy and Laser-Induced Breakdown Spectroscopy (LIBS). Obtained spectroscopic data were then processed using Multivariate Data Analysis algorithms. Principal Components Analysis (PCA) was selected as the most suitable technique for visualization of bacterial strains data. To classify the bacterial strains, we used Neural Networks, namely a supervised version of Kohonen’s self-organizing maps (SOM). We were processing results in three different ways - separately from LIBS measurements, from Raman measurements, and we also merged data from both mentioned methods. The three types of results were then compared. By applying the PCA to Raman spectroscopy data, we observed that two bacterial strains were fully distinguished from the rest of the data set. In the case of LIBS data, three bacterial strains were fully discriminated. Using a combination of data from both methods, we achieved the complete discrimination of all bacterial strains. All the data were classified with a high success rate using SOM algorithm. The most accurate classification was obtained using a combination of data from both techniques. The classification accuracy varied, depending on specific samples and techniques. As for LIBS, the classification accuracy ranged from 45% to 100%, as for Raman Spectroscopy from 50% to 100% and in case of merged data, all samples were classified correctly. Based on the results of the experiments presented in this work, we can assume that the combination of Raman spectroscopy and LIBS significantly enhances discrimination and classification accuracy of bacterial species and strains. The reason is the complementarity in obtain

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Spectrochimica Acta Part B

ISSN

0584-8547

e-ISSN

—

Volume of the periodical

2018

Issue of the periodical within the volume

139

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

6-12

UT code for WoS article

000423897000002

EID of the result in the Scopus database

2-s2.0-85033551008