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  Tailored disorder in calcite organization in tergite cuticle of the supralittoral isopod Tylos europaeus Arcangeli, 1938

Seidl, B. H. M., Griesshaber, E., Fabritius, H.-O., Reisecker, C., Hild, S., Taiti, S., et al. (2018). Tailored disorder in calcite organization in tergite cuticle of the supralittoral isopod Tylos europaeus Arcangeli, 1938. Journal of Structural Biology, 204(3), 464-480. doi:10.1016/j.jsb.2018.09.012.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-A386-D Version Permalink: http://hdl.handle.net/21.11116/0000-0003-A387-C
Genre: Journal Article

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 Creators:
Seidl, Bastian H. M.1, Author              
Griesshaber, Erika2, Author              
Fabritius, Helge-Otto3, Author              
Reisecker, Christian4, Author              
Hild, Sabine5, Author              
Taiti, Stefano6, 7, Author              
Schmahl, Wolfgang W.2, Author              
Ziegler, Andreas Siegfried8, Author              
Affiliations:
1Central Facility for Electron Microscopy, University of Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Germany, ou_persistent22              
2Department of Earth and Environmental Sciences, LMU Munich, Germany, ou_persistent22              
3Biological Composites, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863385              
4Institute of Polymer Science, Johannes Kepler Universität Linz, Altenbergerstraße 69, 4040 Linz, Austria, ou_persistent22              
5Head of the Institute of Polymer Science, Johannes Kepler University, Austria, ou_persistent22              
6Istituto per lo Studio degli Ecosistemi, CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy, ou_persistent22              
7Museo di Storia Naturale, Sezione di Zoologia “La Specola”, Via Romana 17, 50125 Firenze, Italy, ou_persistent22              
8Central Facility for Electron Microscopy, University of Ulm, Albert-Einstein-Allee 11, Ulm 89069, Germany, ou_persistent22              

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Free keywords: calcium carbonate; calcium phosphate, animal experiment; animal tissue; Article; chemical composition; controlled study; crystallography; cuticle; diffraction; dorsal region; electron backscatter diffraction; electron probe microanalysis; field emission scanning electron microscopy; hardness; Isopoda; membrane; nonhuman; phase transition; priority journal; Raman spectrometry; structure analysis; Tylos europaeus; Young modulus
 Abstract: The crustacean cuticle forms skeletal elements consisting of chitin-protein fibrils reinforced by amorphous and crystalline calcium carbonate and phosphate minerals. The edges of skeletal elements are of particular interest. They are subject to repeated strain and stress because they form transitions to the arthrodial membranes connecting them. These allow for relative movements of skeletal elements. In this study, we investigate structure, chemical composition, mineral organization and local mechanical properties of the anterior and posterior edges of the tergite cuticle in the conglobating beach isopod Tylos europaeus and compare these with the protective dorsal region of the tergites. The distribution of mineral phases at the edges resembles that of dorsal regions of the tergites. At the transition with the unmineralized arthrodial membrane the calcite containing distal exocuticle is replaced by epicuticular material and the subjacent cuticular layers containing amorphous calcium carbonate become enriched with amorphous calcium phosphate. At the edges, the local elastic modulus and hardness values are significantly lower compared to dorsal regions of the tergite cuticle, for both, the calcite and the amorphous mineral containing layers. The calcite within the tergite cuticle is assembled in different texture patterns: (i) almost random co-orientation, (ii) almost single crystalline calcite, and (iii) a graded organization. Calcite organization and co-orientation strength is highly variable, not only on very few tens of micrometres, but also between regions with different skeletal functionality. Our results show that besides structure and composition, patterns of calcite organization contribute to the hierarchical architecture and functionality of biological composites. © 2018 Elsevier Inc.

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Language(s): eng - English
 Dates: 2018-12
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.jsb.2018.09.012
BibTex Citekey: Seidl2018464
 Degree: -

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Title: Journal of Structural Biology
  Abbreviation : J. Struct. Biol.
Source Genre: Journal
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Publ. Info: San Diego, CA : Elsevier
Pages: - Volume / Issue: 204 (3) Sequence Number: - Start / End Page: 464 - 480 Identifier: ISSN: 1047-8477
CoNE: https://pure.mpg.de/cone/journals/resource/954922650160