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Figure 3
Bright-field images (row 1) and corresponding PC1 (row 2) and PC2 (row 3) images of PR-SHG images analyzed with PCA. Results for four cPAH crystalline conglomerates (columns A–D) and two apparently single pristine crystals (columns E and F) are shown. White regions correspond to large positive values and black regions correspond to large negative values.

Journal logoBIOLOGICAL
ISSN: 1399-0047
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