Characterizing photochemical ageing processes of microplastic materials using multivariate analysis of infrared spectra

2022 ◽  
Author(s):  
Misha Zvekic ◽  
Larissa C Richards ◽  
Christine C. Tong ◽  
Erik T. Krogh
Keyword(s):  
Multivariate Analysis ◽  
Environmental Health ◽  
Infrared Spectra ◽  
Direct Effects ◽  
Ageing Processes

Microplastics in the environment are an emerging concern due to impacts on human and environmental health. In addition to direct effects on biota, microplastics influence the fate and distribution of...

A multivariate analysis for enhancing the interpretation of infrared spectra of plant residues on lithic artefacts

2020 ◽  
Vol 33 ◽  
pp. 102526
Author(s):  
Alessandro Nucara ◽  
Stella Nunziante-Cesaro ◽  
Flavia Venditti ◽  
Cristina Lemorini
Keyword(s):  
Multivariate Analysis ◽  
Infrared Spectra ◽  
Plant Residues

Pre-processing of Fourier transform infrared spectra by means of multivariate analysis implemented in the R environment

The Analyst ◽  
2015 ◽  
Vol 140 (8) ◽  
pp. 2810-2814 ◽  
Author(s):  
Krzysztof Banas ◽  
Agnieszka Banas ◽  
Mariusz Gajda ◽  
Bohdan Pawlicki ◽  
Wojciech M. Kwiatek ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Multivariate Analysis ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Hierarchical Cluster Analysis ◽  
Traditional Approach ◽  
Hierarchical Cluster ◽  
Fourier Transform Infrared ◽  
Average Intensity ◽  
Fourier Transform Infrared Spectra

Segmentation of the hyperspectral dataset by using hierarchical cluster analysis shows its advantage over the traditional approach based on the average intensity.

A novel diagnostic test for arthritis: Multivariate analysis of infrared spectra of synovial fluid

1997 ◽  
Vol 3 (2) ◽  
pp. 161-167 ◽  
Author(s):  
H. H. Eysel ◽  
M. Jackson ◽  
A. Nikulin ◽  
R. L. Somorjai ◽  
G. T. D. Thomson ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Synovial Fluid ◽  
Diagnostic Test ◽  
Infrared Spectra

Benthic assemblages in Utah headwater streams with and without trout

1993 ◽  
Vol 71 (5) ◽  
pp. 896-900 ◽  
Author(s):  
Bret C. Harvey
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Herbivorous Insect ◽  
Direct Effects ◽  
Multivariate Analysis Of Variance ◽  
Benthic Assemblages ◽  
High Gradient ◽  
Invertebrate Predators ◽  
Significant Difference ◽  
Northern Utah

In a series of high-gradient streams along the Wasatch Front in northern Utah, perlid stoneflies were more abundant in benthic samples from 14 fishless streams than in 9 similar streams which contained trout. Smaller-bodied perlodid stoneflies were more abundant in samples from streams containing trout. Herbivorous insect abundances varied substantially within groups of streams containing and lacking trout; multivariate analysis of variance using the six most abundant herbivorous taxa indicated no significant difference between the two groups of streams. Similarly, total numbers of invertebrates did not differ between streams with and without fish. Sites above and below the upstream limit of trout in three streams showed patterns in invertebrate abundances similar to that seen at the whole-stream scale. Trout may have no effect on the overall density of stream benthos because of their negative direct effects on invertebrate predators.

Multivariate analysis applied to near-infrared spectra of milk

1987 ◽  
Vol 59 (17) ◽  
pp. 2187-2191 ◽  
Author(s):  
Paul. Robert ◽  
Dominique. Bertrand ◽  
Marie Francoise. Devaux ◽  
Rene. Grappin
Keyword(s):  
Multivariate Analysis ◽  
Infrared Spectra ◽  
Near Infrared ◽  
Near Infrared Spectra
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