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Poster communications

Solid state NMR and diatoms: probing the interfaces

Abstract : Studies on silica biomineralization focus principally on marine sponges and diatoms. Diatoms are known to synthesise a silicified cell wall named “frustule” by intracellular transport and polymerisation of silicic acid Si(OH)4. Frustule is also composed of organic matter - mainly polysaccharides, proteins such as silaffins and long chain polyamines - that were already demonstrated to be capable of inducing silica polymerization into nanospheres of ca. 50-200 nm in diameter. In this context, solid-state Nuclear Magnetic Resonance (ssNMR) appears to be a powerful tool for studying the mineral-organics interactions in Thalassiosira pseudonana specimen. To do so, isotopically doubly-enriched (15N, 13C) T. Pseudonana were studied as whole cells, SDS-extracted and H2O2-cleaned samples by 1H, 13C, 15N, 29Si and 31P ssNMR through 1D and 2D experiments.
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Poster communications
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https://hal.sorbonne-universite.fr/hal-01138970
Contributor : Guillaume Laurent <>
Submitted on : Friday, April 3, 2015 - 10:56:10 AM
Last modification on : Wednesday, September 23, 2020 - 4:33:52 AM
Long-term archiving on: : Saturday, July 4, 2015 - 10:11:46 AM

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  • HAL Id : hal-01138970, version 1

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Sylvie Masse, Guillaume Laurent, T. Coradin. Solid state NMR and diatoms: probing the interfaces. Biomineralization short course, Dec 2014, Paris, France. ⟨hal-01138970⟩

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