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Embedded proteins and sacrificial bonds provide the strong adhesive properties of gastroliths
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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2012 (English)In: NANOSCALE, ISSN 2040-3364, Vol. 4, no 13, 3910-3916 p.Article in journal (Refereed) Published
Abstract [en]

The adhesive properties of gastroliths from a freshwater crayfish (Cherax quadricarinatus) were quantified by colloidal probe atomic force microscopy (AFM) between heavily demineralized gastrolith microparticles and gastrolith substrates of different composition. Combined AFM and transmission electron microscopy studies demonstrated that the sequential detachment and large adhesion energies that characterise the adhesive behaviour of a native gastrolith substrate are dominated by sacrificial bonds between chitin fibres and between chitin fibres and CaCO3. The sacrificial bonds were shown to be strongly related to the gastrolith proteins and when the majority of these proteins were removed by ethylenediaminetetraacetic acid (EDTA), the sequential detachment disappeared and the adhesive energy was reduced by more than two orders of magnitude.

Place, publisher, year, edition, pages
2012. Vol. 4, no 13, 3910-3916 p.
National Category
Chemical Sciences Materials Chemistry Nano Technology
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URN: urn:nbn:se:su:diva-80114DOI: 10.1039/c2nr30536dISI: 000305255600015OAI: oai:DiVA.org:su-80114DiVA: diva2:553299
Note

AuthorCount:9;

Available from: 2012-09-18 Created: 2012-09-12 Last updated: 2012-09-18Bibliographically approved

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Jansson, KjellHedin, NiklasBergström, Lennart
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