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. 2017 Dec 18;12(12):e0188345. doi: 10.1371/journal.pone.0188345

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© 2017 Vongsvivut et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 7 — PCA score (left) and loading (right) plots based on high-resolution synchrotron macro ATR-FTIR spectra of 4.5% SiO₂NPs polyester composite coatings showing the projection against the first PC (PC1), which explains the majority of the spectral variation between their control and after 3 years of exposure to (A) tropical Singapore and (B) sub-tropical Queensland climates. Note that the PC3 loadings plot is also included for comparison.