| 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
Places of action
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article
Additives influence the phase behavior of calcium carbonate solution by a cooperative ion-association process
Abstract
<p>Amorphous calcium carbonate (ACC) has been widely found in biomineralization, both as a transient precursor and a stable phase, but how organisms accurately control its formation and crystallization pathway remains unclear. Here, we aim to illuminate the role of biologically relevant additives on the phase behaviour of calcium carbonate solution by investigating their effects on the formation of ACC. Results show that divalent cations like magnesium (Mg<sup>2+</sup>) ions and negatively charged small organic molecules like aspartic acid (Asp) have little/no effect on ACC formation. However, the particle size of ACC is significantly reduced by poly(aspartic acid) (pAsp) with long chain-length, but no effect on the position of the phase boundary for ACC formation was observed. Phosphate (PO<sub>4</sub><sup>3-</sup>) ions are even more effective in reducing ACC particle size, and shift the phase boundary for ACC formation to lower concentrations. These phenomena can be explained by a cooperative ion-association process where the formation of ACC is only influenced by additives that are able to attract either Ca<sup>2+</sup> ions or CO<sub>3</sub><sup>2-</sup> ions and, more importantly, introduce an additional long range interaction between the CaCO03 complexes and promote the phase separation process. The findings corroborate with our proposed model of ACC formation via spinodal decomposition and provide a more realistic representation of how biology can direct mineralization processes.</p>