Radular stylus of Cryptochiton stelleri: A multifunctional lightweight and flexible fiber-reinforced composite.

Animals Ferrosoferric Oxide Microscopy, Electron Polyplacophora Tooth
Biocomposite Flexible Force transduction Mollusk

Journal

Journal of the mechanical behavior of biomedical materials
ISSN: 1878-0180
Titre abrégé: J Mech Behav Biomed Mater
Pays: Netherlands
ID NLM: 101322406

Informations de publication

Date de publication:
11 2020
Historique:
received: 16 02 2020
revised: 22 05 2020
accepted: 13 07 2020
pubmed: 22 8 2020
medline: 15 5 2021
entrez: 22 8 2020
Statut: ppublish

Résumé

Chitons are herbivorous invertebrates that use rows of ultrahard magnetite-based teeth connected to a flexible belt (radula) to rasp away algal deposits growing on and within rocky outcrops along coastlines around the world. Each tooth is attached to the radula by an organic structure (stylus) that provides mechanical support during feeding. However, the underlying structures within the stylus, and their subsequent function within the chiton have yet to be investigated. Here, we investigate the macrostructural architecture, the regional material and elemental distribution and subsequent nano-mechanical properties of the stylus from the Northern Pacific dwelling Cryptochiton stelleri. Using a combination of μ-CT imaging, optical and electron microscopy, as well as elemental analysis, we reveal that the stylus is a highly contoured tube, mainly composed of alpha-chitin fibers, with a complex density distribution. Nanoindentation reveals regiospecific and graded mechanical properties that can be correlated with both the elemental composition and material distribution. Finite element modeling shows that the unique macroscale architecture, material distribution and elemental gradients have been optimized to preserve the structural stability of this flexible, yet robust functionally-graded fiber-reinforced composite tube, providing effective function during rasping. Understanding these complex fiber-based structures offers promising blueprints for lightweight, multifunctional and integrated materials.

Identifiants

DOI: 10.1016/j.jmbbm.2020.103991 PMID: 32823075
pubmed: 32823075
pii: S1751-6161(20)30543-9
doi: 10.1016/j.jmbbm.2020.103991
pii:
doi:

Substances chimiques

Ferrosoferric Oxide XM0M87F357

Types de publication

Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Langues

eng

Sous-ensembles de citation

IM

Pagination

103991

Informations de copyright

Copyright © 2020 Elsevier Ltd. All rights reserved.

Auteurs

Anna Pohl (A)

Materials Science and Engineering Program, University of California, Riverside, USA; Department of Chemical and Environmental Engineering, University of California, Riverside, USA.

Steven A Herrera (SA)

Materials Science and Engineering Program, University of California, Riverside, USA.

David Restrepo (D)

Lyles School of Civil Engineering, Purdue University, West Lafayette, USA; Department of Mechanical Engineering, The University of Texas at San Antonio, USA.

Ryo Negishi (R)

Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Tokyo, Japan.

Jae-Young Jung (JY)

Materials Science and Engineering Program, University of California, San Diego, USA; Department of Orthopaedic Surgery, University of California, San Francisco, USA.

Chris Salinas (C)

Materials Science and Engineering Program, University of California, Riverside, USA.

Richard Wuhrer (R)

Advanced Materials Characterization Facility, Western Sydney University, Australia.

Tomoko Yoshino (T)

Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Tokyo, Japan.

Joanna McKittrick (J)

Materials Science and Engineering Program, University of California, San Diego, USA.

Atsushi Arakaki (A)

Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Tokyo, Japan.

Michiko Nemoto (M)

Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.

Pablo Zavattieri (P)

Lyles School of Civil Engineering, Purdue University, West Lafayette, USA.

David Kisailus (D)

Materials Science and Engineering Program, University of California, Riverside, USA; Department of Chemical and Environmental Engineering, University of California, Riverside, USA; Department of Materials Science and Engineering, University of California, Irvine, USA. Electronic address: david.k@uci.edu.

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Classifications MeSH

questionsmedicales.fr › Eucaryotes › Animaux › Radular stylus of Cryptochiton stelleri: A...
questionsmedicales.fr › Produits chimiques inorganiques › Minéraux › Oxyde ferrosoferrique › Radular stylus of Cryptochiton stelleri: A...
questionsmedicales.fr › Techniques d'investigation › Microscopie électronique › Radular stylus of Cryptochiton stelleri: A...
questionsmedicales.fr › Eucaryotes › Animaux › Invertébrés › Mollusca › Polyplacophora › Radular stylus of Cryptochiton stelleri: A...
questionsmedicales.fr › Système stomatognathique › Bouche › Denture › Dent › Radular stylus of Cryptochiton stelleri: A...