Figure 1
Prayer bead, boxwood, AGO ID.29283. (A) Exterior (B) Interior carving showing the Carring of the Cross. The Thomson Collection of European Art © Art Gallery of Ontario.
Table 1
FTIR absorbance: assigned vibrations and corresponding structural units (Barker & Owen, 1999; Collier et al., 1992; Ferraz et al., 2000; Garside & Wyeth, 2003; Pandey, 1999).
| FTIR Absorbance Location (cm–1) | Vibration | Structural Unit |
|---|---|---|
| 3347 | O–H | Cellulose, Lignin, Absorbed H2O |
| 1596 | Aromatic skeletal C–C | Lignin |
| 1508 | Aromatic in-plane C–C | Lignin |
| 1369 | C–H | Cellulose |
| 1033 | Alkyl C–OH | Cellulose |
Figure 2
X-ray photoelectron spectra of high-resolution carbon 1s (A) 44-hour experiment with data collected every 25 minutes (B) 13-hour experiment with data collected every 4 minutes (C) first 25 minutes of the 13-hour experiment.
Figure 3
FTIR spectrum before and after 44-hour exposure to XPS.
Figure 4
FTIR peak absorbance values for boxwood: (A) µCT scanned sample compared to reference (B) sample exposed to handheld XRF for 60 or 120 seconds compared to reference. For each data set, no differences in absorbance at any measured wavenumber were detected (µCT: U ≤ 66.0, P > 0.140; XRF: F ≤ 1.436, P > 0.159).