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CC BY V4.0, Open Access
Journal article
Composite material in the sea urchin Cidaris rugosa : ordered and disordered micrometre-scale bicontinuous geometries
Journal of the Royal Society interface, Vol.21(212), 20230597
2024
PMID: 38471532
Abstract
The sponge-like biomineralized calcite materials found in echinoderm skeletons are of interest in terms of both structure formation and biological function. Despite their crystalline atomic structure, they exhibit curved interfaces that have been related to known triply periodic minimal surfaces. Here, we investigate the endoskeleton of the sea urchin that has long been known to form a microstructure related to the Primitive surface. Using X-ray tomography, we find that the endoskeleton is organized as a composite material consisting of domains of bicontinuous microstructures with different structural properties. We describe, for the first time, the co-occurrence of ordered single Primitive and single Diamond structures and of a disordered structure within a single skeletal plate. We show that these structures can be distinguished by structural properties including solid volume fraction, trabeculae width and, to a lesser extent, interface area and mean curvature. In doing so, we present a robust method that extracts interface areas and curvature integrals from voxelized datasets using the Steiner polynomial for parallel body volumes. We discuss these very large-scale bicontinuous structures in the context of their function, formation and evolution.
Details
- Title
- Composite material in the sea urchin Cidaris rugosa : ordered and disordered micrometre-scale bicontinuous geometries
- Authors/Creators
- Anna-Lee Jessop - School of Mathematics, Statistics, Chemistry and Physics, Murdoch University, Murdoch, AustraliaAllan J Millsteed - Murdoch UniversityJacob J K Kirkensgaard - University of WürzburgJeremy Shaw - The University of Western AustraliaPeta L Clode - The University of Western AustraliaGerd E Schröder-Turk - University of Canberra
- Publication Details
- Journal of the Royal Society interface, Vol.21(212), 20230597
- Publisher
- the Royal Society
- Identifiers
- 991005649566007891
- Copyright
- © 2024 The Authors.
- Murdoch Affiliation
- School of Mathematics, Statistics, Chemistry and Physics
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.1339 Marine Invertebrate Development
- Web Of Science research areas
- Multidisciplinary Sciences
- ESI research areas
- Biology & Biochemistry