Biominerals

Ehrlich, Hermann

doi:10.1007/978-90-481-9130-7_2

Cited by 3 publications

(1 citation statement)

References 136 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Установлено, что карбонат кальция может быть осажден в трех кристаллических полиморфных формах: кальците и арагоните, в меньшей степени фатерите (ватерите). Инкрустация цианобактерий кальцитом часто наблюдается в морских, солоноватых и в меньшей степени пресных водах (Rivadeneyra, 1994;Билан, Усов, 2001;Ehrlich, 2010;Kamennaya et al, 2012;Цыренова и др., 2018;Самылина и др., 2022 и др.). Считается, что механизм процесса кальцификации цианобактерий, независимо от их местообитания и экологических условий, сходен и возникает как результат изменения карбонатного равновесия.…”

Section: Introductionunclassified

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Mityusheva,

Katkova,

Filippov

et al. 2024

Vestnik of Geosciences

View full text Add to dashboard Cite

This article describes crystallization formed in the exogenous mucous sheath of phototrophic microorganisms living in the surface waters of the south area of the Komi Republic. The mineralization of colonies of cyanobacteria of the Gloeotrichia sp. and green algae Chaetophora elegans was studied. The waters of rivers in the Northern Dvina basin have been studied as habitats for the microorganisms. They have a different composition: HCO3 Ca–Mg, typical for the taiga zone of a temperate continental climate; SO4–HCO3 Ca–Mg and Cl–Na (in the zone of technogenic pollution). Using the example of these neutral — weakly alkaline ultrafresh — salty (0.2—2.8 g/L) waters, it is shown that the geochemistry of the aquatic environment is one of the most important factors influencing the minerogenesis. Calcite, vaterite, quartz and halite were identified in dried colonies of microorganisms within the extracellular polymeric substance using the methods of X-ray diffractometry, electron microscopy, microprobe analysis and IR spectroscopy. The morphological features of microminerals are presented depending on the type of microorganisms. Calcium carbonate crystals and aggregates are formed within the exogenous mucous sheath of algae and cyanophytes. The carbon isotope composition of carbonates (13C –7.5 and –3.8 ‰ PDB) indicates their organic nature. The formation of minerals, morphological features of crystals and the degree of biomineralisation of colonies of phototrophic microorganisms are conditioned by the physicochemical parameters of the aquatic environment. The possibilities of chemogenic precipitation of carbonates from the studied natural waters were assessed.

show abstract

Section: Introductionunclassified

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Mityusheva,

Katkova,

Filippov

et al. 2024

Vestnik of Geosciences

View full text Add to dashboard Cite

show abstract

Medical Applications of Hierarchical Composites

Agrawal

Lahiri

2015

Hybrid and Hierarchical Composite Materials

View full text Add to dashboard Cite

Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO3 and CaCO3·6H2O to Calcite Film

et al. 2012

View full text Add to dashboard Cite

Calcium carbonate, ubiquitous throughout nature, is one of the most biologically significant minerals. It is known that the organic matrix of biological materials controls the phase transition of CaCO 3 , but much remains undiscovered regarding its pathway from an amorphous to crystalline solid. In this study, examination of the initial formation of CaCO 3 films has been proposed as a new methodology to identify the phase transition of CaCO 3 . We have identified a significant role for both serine and arginine in the synthesis of CaCO 3 and have found them to be important for the stabilization of amorphous calcium carbonate and CaCO 3 ·6H 2 O. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy have been used for the identification of crystalline phase and surface structure. This study presents information useful for understanding the phase transition of CaCO 3 and the function of organic molecules in the formation of biological materials.

show abstract

Biominerals

Cited by 3 publications

References 136 publications

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Medical Applications of Hierarchical Composites

Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO<sub>3</sub> and CaCO<sub>3</sub>·6H<sub>2</sub>O to Calcite Film

Contact Info

Product

Resources

About

Biominerals

Cited by 3 publications

References 136 publications

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)

Medical Applications of Hierarchical Composites

Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO<sub>3</sub> and CaCO<sub>3</sub>&middot;6H<sub>2</sub>O to Calcite Film

Contact Info

Product

Resources

About

Effect of Serine and Arginine on the Phase Transition from Amorphous CaCO<sub>3</sub> and CaCO<sub>3</sub>·6H<sub>2</sub>O to Calcite Film