0000000000646387

AUTHOR

Myriam Hajir

showing 3 related works from this author

Single nanogranules preserve intracrystalline amorphicity in biominerals.

2015

We revisit the ultrastructural features of different calcareous biominerals and identify remarkable similarities: taxonomically very distant species show a common nanogranular structure, even if different extracellular secretion patterns are employed or calcium carbonate polymorphs formed. By these analyses, we elucidate the locus of the small fraction of intracrystalline organic matrix revealing its intergranular character and localize the intracrystalline amorphous calcium carbonate moiety commonly found in mesocrystalline biominerals and provide a first explanation for the pathway by which it is preserved.

0301 basic medicineMaterials scienceMechanical EngineeringMineralogy02 engineering and technology[ SDV.IB.BIO ] Life Sciences [q-bio]/Bioengineering/Biomaterials021001 nanoscience & nanotechnologyAmorphous calcium carbonate[SDV.IB.BIO] Life Sciences [q-bio]/Bioengineering/Biomaterials03 medical and health scienceschemistry.chemical_compound030104 developmental biologyCalcium carbonatechemistryMechanics of MaterialsBiophysicsGeneral Materials ScienceOrganic matrix0210 nano-technologyMesocrystalCalcareousComputingMilieux_MISCELLANEOUSBiomineralization
researchProduct

Pseudomorphic transformation of amorphous calcium carbonate films follows spherulitic growth mechanisms and can give rise to crystal lattice tilting

2015

Amorphous calcium carbonate films synthesized by the polymer-induced liquid-precursor (PILP) process convert into crystallographically complex calcite spherulites. Tuning the experimental parameters allows for the generation of crystal lattice tilting similar to that found in calcareous biominerals. This contribution evidences the role of spherulitic growth mechanisms in pseudomorphic transformations of calcium carbonate.

CalciteMaterials scienceTechnische FakultätMineralogy02 engineering and technologyGeneral ChemistryCrystal structure-010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesTransformation (music)Amorphous calcium carbonate0104 chemical scienceschemistry.chemical_compoundCalcium carbonatechemistryChemical engineeringGeneral Materials Science0210 nano-technologyCalcareousddc:600
researchProduct

Stable amorphous calcium oxalate: synthesis and potential intermediate in biomineralization.

2014

Amorphous calcium oxalate nanoparticles with sizes of 10–30 nm were synthesized at room temperature by the hydrolysis of a dimethyl oxalate from ethanol solution.

Calcium OxalateEthanolHydrolysisInorganic chemistryMetals and AlloysCalcium oxalateTemperatureNanoparticleGeneral ChemistryCatalysisSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsAmorphous solidHydrolysischemistry.chemical_compoundCalcium ChloridechemistryMaterials ChemistryCeramics and CompositesNanoparticlesParticle SizeDimethyl oxalateBiomineralizationChemical communications (Cambridge, England)
researchProduct