| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Politi, Yael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2021The spider cuticle: a remarkable material toolbox for functional diversitycitations
- 2020Adaptations for Wear Resistance and Damage Resiliencecitations
- 2018Hydrogen Bonding in Amorphous Calcium Carbonate and Molecular Reorientation Induced by Dehydrationcitations
- 2018The Crystallization of Amorphous Calcium Carbonate is Kinetically Governed by Ion Impurities and Water.citations
- 2018Additives influence the phase behavior of calcium carbonate solution by a cooperative ion-association processcitations
- 2018Interplay between Calcite, Amorphous Calcium Carbonate, and Intracrystalline Organics in Sea Urchin Skeletal Elementscitations
- 2017Nano-channels in the spider fang for the transport of Zn ions to cross-link His-rich proteins pre-deposited in the cuticle matrixcitations
- 2017Control of Polymorph Selection in Amorphous Calcium Carbonate Crystallization by Poly(Aspartic Acid): Two Different Mechanismscitations
- 2017On the Phase Diagram of Calcium Carbonate Solutionscitations
- 2016Ordering of protein and water molecules at their interfaces with chitin nano-crystalscitations
- 2015Micro- and nano-structural details of a spider's filter for substrate vibrationscitations
- 2014A spider's biological vibration filtercitations
- 2014The Mechanical Role of Metal Ions in Biogenic Protein-Based Materialscitations
- 2014Multiscale structural gradients enhance the biomechanical functionality of the spider fangcitations
- 2014Nanostructure of Biogenic Calcite and Its Modification under Annealing: Study by High-Resolution X-ray Diffraction and Nanoindentationcitations
- 2013Structural and mechanical properties of the arthropod cuticlecitations
- 2012Plant Cystoliths: A Complex Functional Biocomposite of Four Distinct Silica and Amorphous Calcium Carbonate Phasescitations
- 2012A Spider's Fang: How to Design an Injection Needle Using Chitin-Based Composite Materialcitations
- 2010Differences between bond lengths in biogenic and geological calcitecitations
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article
Differences between bond lengths in biogenic and geological calcite
Abstract
<p>We used high-resolution neutron powder diffraction to accurately measure the atomic positions and bond lengths in biogenic and geological calcite. A special procedure for data analysis was developed in order to take into account the considerable amounts of magnesium present in all the investigated samples. As a result, in biogenic calcite we found some atomic bonds to have significantly different lengths as compared to those in geological calcite, after the contribution of magnesium is accounted for. The maximum effect (elongation up to 0.7%) was found for the C-O bonds. We also analyzed changes in frequencies and spectral widths of normal vibrations of carbonate groups in biogenic calcite (as compared to geological calcite) measured by Raman and Fourier transform IR techniques. Surprisingly, the frequency shifts after subtracting the magnesium contribution are close to zero. At the same time, substantial spectral broadening (up to 1.2%) in biogenic calcite as compared to geological samples was detected. Possible explanations for the experimental findings are discussed.</p>