Unlike conventional x-ray diffraction techniques that use x-rays of one energy, EDD irradiates with x-rays of different wavelengths. "The mechanical properties of mineralized tissues depend strongly on how the mineral is oriented, and we wanted to use our novel technique to obtain informative 3D EDD maps of distribution of bioapatite nanocrystal orientations within the mineralized tissue of blue sharks." Stock of Northeastern University's Feinberg School of Medicine. The information we can get from traditional absorption or phase contrast imaging techniques is quite limited," explains corresponding author Stuart R. "Studies that use 3D diffraction to map mineralized tissue are quite rare, and there have been no such diffraction studies on shark centrum tissues. Their findings are reported in a new paper published in SPIE's Journal of Medical Imaging (JMI). To gain further insights into the special characteristics of shark centra, an interdisciplinary team of researchers used a novel approach in which energy dispersive diffraction (EDD) was performed using polychromatic synchrotron x-radiation. However, from a functional standpoint, it is not fully clear how the complex 3D mineral structures of the shark centrum support and distribute loads within it. These swimming-induced loads are borne by the centrum-mineralized bony tissue present in the shark's vertebrae.
Sharks swim at high speeds under deep water, and their skeletons experience high pressure and strain.
Shark skeletons, made of rubbery tissue called cartilage, have fascinated scientists for eons. Sharks, found in deep and shallow waters throughout the oceans, are some of the oldest living creatures on planet Earth.
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