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![[Figure 1]](vl5025fig1mag.jpg)
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Figure 1
The overall data-processing workflow and representative data collected in scanning tomography measurements. (A) An overview of all the processing and analysis described in this article. The experimental geometry and typical scattering patterns are shown in (B). The plant sample is schematically depicted as a collection of hollow cylinders that represent the cell walls. The spiral lines indicate the orientation of cellulose fibrils with a non-zero MFA value. The sample is scanned across the X-ray beam (red arrow) at a series of projection angles during measurements. The scattering patterns were collected on two separate detectors, for small- and wide-angle X-ray scattering (SAXS and WAXS), and then reformatted and merged into q–φ maps. The relevant data collection and processing details have been described elsewhere (Yang et al., 2022  ). The data shown are from (C) a bamboo sample and (D) a rice sample, respectively. The lower horizontal (ix) and left vertical axes (iy) are the pixel indices of the intensity map. The intensity profiles averaged over all azimuthal angles, φ, are shown in (E), while the angular intensity distributions near the maximum of the cellulose peak are shown in the inset. The scattering intensity spans a dynamic range of several orders of magnitudes. Therefore, in (C) and (D), the scattering intensity has been multiplied with a factor of q2 so that the features at both high q and low q are visible with the same color scale. Similarly, a non-uniform q grid is used to show features more clearly at both high q and low q. The black vertical lines in (E) indicate the peaks that are attributed to the structure of starch. |
![[Figure 1]](vl5025fig1.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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