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ultrastructure of pachycephalosaurid ossified tendon
This paper would probably have gone by undetected by most researchers: what an
obscure dinosaur journal!
Mark Goodwin, Ivan Lonardelli, Luca Lutterotti and Hans-Rudolf Wenk
Texture analysis from synchrotron diffraction images with the Rietveld method:
dinosaur tendon and salmon scale
Journal of Synchrotron Radiation
Volume 12 Issue 3 Page 354 - May 2005
A Rietveld method is described which extracts information on crystal structure,
texture and microstructure directly from two-dimensional synchrotron
diffraction images. This is advantageous over conventional texture analysis
that relies on individual diffraction peaks, particularly for low-symmetry
materials with many overlapping peaks and images with a poor peak-to-background
ratio. The method is applied to two mineralized biological samples with
hydroxylapatite fabrics: an ossified pachycephalosaurid dinosaur tendon and an
Atlantic salmon scale. Both are measured using monochromatic synchrotron
X-rays. The dinosaur tendon has very strongly oriented crystals with c-axes
parallel to the tendon direction. The salmon scale displays a weak texture.
Dr. Markus Moser
Staatliches Museum fuer Naturkunde Stuttgart
Museum am Loewentor (= Rosenstein 1)
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