Chemical and Structural Information from the Enamel of a Troodon Tooth Leading to an Understanding of Diet and Environment
| Autor: | Kirstin S. Brink, Thomas Ellis, Renfei Feng, Ramaswami Sammynaiken, Don Brinkman, Gabriele Schatte, Jason Maley, Ruth E. Hoffmeyer |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Materials science X-ray fluorescence Environment Microscopy Atomic Force law.invention Dinosaurs 03 medical and health sciences 0302 clinical medicine stomatognathic system X-Ray Diffraction law Animals Electron paramagnetic resonance Spectroscopy Dental Enamel Instrumentation Enamel paint biology Fossils Spectrometry X-Ray Emission 030206 dentistry biology.organism_classification Biological Evolution Synchrotron Diet stomatognathic diseases Crystallography 030104 developmental biology visual_art X-ray crystallography visual_art.visual_art_medium Crystallite Troodon |
| Zdroj: | Applied spectroscopy. 70(11) |
| ISSN: | 1943-3530 |
| Popis: | Synchrotron micro X-ray fluorescence (XRF) spectroscopy with two-dimensional element mapping, micro X-ray diffraction (XRD), electron spin resonance spectroscopy (ESR) and atomic force microscopy (AFM) were used to investigate the chemical and structural nature of the enamel of a tooth from Troodon, a small theropod dinosaur. These methods show that the crystallites in the Troodon tooth are submicron-sized carbonated calcium hydroxyapatite, which are semi-randomly oriented with a preferred orientation of (002) towards the surface of the tooth. Transition metal ions are distributed in the voids between crystallite clusters. Comparison of the ESR spectra indicates that the Troodon tooth had less exposure to UV than a fossilized crocodile tooth. |
| Databáze: | OpenAIRE |
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