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Artykuły w czasopismach na temat "Inorganic Crystal (Biomineralization)"
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Arai, Kosuke, Satoshi Murata, Taifeng Wang, Wataru Yoshimura, Mayumi Oda-Tokuhisa, Tadashi Matsunaga, David Kisailus i Atsushi Arakaki. "Adsorption of Biomineralization Protein Mms6 on Magnetite (Fe3O4) Nanoparticles". International Journal of Molecular Sciences 23, nr 10 (16.05.2022): 5554. http://dx.doi.org/10.3390/ijms23105554.
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Biomineralization is an elaborate process that controls the deposition of inorganic materials in living organisms with the aid of associated proteins. Magnetotactic bacteria mineralize magnetite (Fe3O4) nanoparticles with finely tuned morphologies in their cells. Mms6, a magnetosome membrane specific (Mms) protein isolated from the surfaces of bacterial magnetite nanoparticles, plays an important role in regulating the magnetite crystal morphology. Although the binding ability of Mms6 to magnetite nanoparticles has been speculated, the interactions between Mms6 and magnetite crystals have not been elucidated thus far. Here, we show a direct adsorption ability of Mms6 on magnetite nanoparticles in vitro. An adsorption isotherm indicates that Mms6 has a high adsorption affinity (Kd = 9.52 µM) to magnetite nanoparticles. In addition, Mms6 also demonstrated adsorption on other inorganic nanoparticles such as titanium oxide, zinc oxide, and hydroxyapatite. Therefore, Mms6 can potentially be utilized for the bioconjugation of functional proteins to inorganic material surfaces to modulate inorganic nanoparticles for biomedical and medicinal applications.
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Chernov, A. A., J. J. De Yoreo, L. N. Rashkovich i P. G. Vekilov. "Step and Kink Dynamics in Inorganic and Protein Crystallization". MRS Bulletin 29, nr 12 (grudzień 2004): 927–34. http://dx.doi.org/10.1557/mrs2004.262.
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AbstractRevived interest in crystal growth from solutions is driven by a variety of demands, including the need to develop an understanding of biomineralization processes in bones, teeth, and shells;and efforts to characterize large optically nonlinear crystals, perfect crystals of proteins, nucleic acids, and complexes such as viruses. Producing and purifying drugs, food, paint, fertilizers, and other polycrystalline materials in industry are other expanding areas that rely on crystal growth from solution. These general practical incentives have activated in-depth studies that revealed new phenomena and raised new fundamental questions: Are thermal fluctuations of steps on a crystal face always fast enough to assure the step propagation at the rate controlled just by molecular incorporation at kinks? Is the Gibbs–Thomson capillarity shift of thermodynamic equilibrium always applicable to evaluate the crystallization driving force of polygonized steps? Is it possible to eliminate the step bunching on a growing crystal face that compromises crystal homogeneity, or at least to mitigate it? In this overview, we will discuss experimental findings and provide state-of-the-art answers to these questions.
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Becker, Wilhelm, Julia Marxen, Matthias Epple i Oliver Reelsen. "Influence of microgravity on crystal formation in biomineralization". Journal of Applied Physiology 89, nr 4 (1.10.2000): 1601–7. http://dx.doi.org/10.1152/jappl.2000.89.4.1601.
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Biomineralized tissues are widespread in animals. They are essential elements in skeletons and in statocysts. The function of both can only be understood with respect to gravitational force, which has always been present. Therefore, it is not astonishing to identify microgravity as a factor influencing biomineralization, normally resulting in the reduction of biomineralized materials. All known biominerals are composite materials, in which the organic matrix and the inorganic materials, organized in crystals, interact. If, during remodeling and turnover processes under microgravity, a defective organization of these crystals occurs, a reduction in biomineralized materials could be the result. To understand the influence of microgravity on the formation of biocrystals, we studied the shell-building process of the snail Biomphalaria glabrataas a model system. We show that, under microgravity (space shuttle flights STS-89 and STS-90), shell material is built in a regular way in both adult snails and snail embryos during the beginning of shell development. Microgravity does not influence crystal formation. Because gravity has constantly influenced evolution, the organization of biominerals with densities near 3 must have gained independence from gravitational forces, possibly early in evolution.
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Rimer, Jeffrey D. "Inorganic ions regulate amorphous-to-crystal shape preservation in biomineralization". Proceedings of the National Academy of Sciences 117, nr 7 (5.02.2020): 3360–62. http://dx.doi.org/10.1073/pnas.1922923117.
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Heywood, Brigid R. "Crystal tectonics: Novel routes to the ordered aggregation and self assembly of inorganic solids". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 424–25. http://dx.doi.org/10.1017/s0424820100169857.
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Oriented materials attract considerable attention since thay have the potential to exhibit collective properties which exceed those of the isotropic species by several orders of magnitude. Much success has already been achieved with organic materials, e.g. liquid crystals, conducting polymers, but reliable protocols for the construction of organised crystal micro-architectures from inorganic solids have yet to be established. Given the potential advantages of translating molecular properties (optical, piezoelectric, catalytic) to the macroscopic scale strategies for the construction of hierarchical crystal assemblies, crystal tectonics, merit particular consideration.This crystal tectonics route to the synthesis of anisotropic inorganic materials remains entirely untested, but draws much of its inspiration from the study of deterministic self-organisation in biological systems. Such self-organisation relies on a series of highly specific “host-guest”, ligandreceptor type interactions (more typically cited examples of such include, enzyme-substrate-cofactor binding, antibody-antigen complexation, and triplet/base matching during polypeptide synthesis). The biogenic formation of hierarchical inorganic arrays, biomineralization, is remarkable not only for its control of crystallisation to yield solids of uniform size and unusual habit, but equally for the construction of elaborate functional micro-architectures from these biosolids.
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Ma, Wen Jie, i Xue Wu Wang. "Effect of Variety and Morphology of Substrate on the Crystal Form of Calcium Carbonate Crystal". Applied Mechanics and Materials 127 (październik 2011): 168–71. http://dx.doi.org/10.4028/www.scientific.net/amm.127.168.
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Based on the basic principles of biomineralization, calcium carbonate (CaCO3) which has specific shapes can be synthesized by the biomimetic synthesis, using three-dimensional (3D) photonic crystals self-assembled by polystyrene spheres as the matrix (Ps film).The effects of variety and morphology of substrate on the crystal form and morphologies of CaCO3 were investigated. It was found that variety of substrates has great influence on the phase of calcium carbonate. On the Ps film, large amount of calcite and aragonite can be observed. SEM of the gold surface shows aragonite needles and vaterite. On the glass surface, large amount of vaterite can be observed. Ps films self-assembled by different diameters of polystyrene spheres have different morphologies and surface roughness, which have deep effects on the crystal form of calcium carbonate.This simple route might open opportunity to synthesis and the study of other novel inorganic materials.
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Han, Yu, Bin Sun, Huaxiao Yan, Maurice E. Tucker, Yanhong Zhao, Jingxuan Zhou, Yifan Zhao i Hui Zhao. "Biomineralization of Carbonate Minerals Induced by The Moderate Halophile Staphylococcus Warneri YXY2". Crystals 10, nr 2 (22.01.2020): 58. http://dx.doi.org/10.3390/cryst10020058.
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Although biomineralization of minerals induced by microorganisms has been widely reported, the mechanisms of biomineralization and the characteristics of the biominerals precipitated needs to be studied further. In this study, Staphylococcus warneri YXY2, a moderate halophile, was used to induce the precipitation of carbonate minerals at various Mg/Ca molar ratios. To investigate the biomineralization mechanism, the growth curve, pH changes, ammonia test, the concentration of bicarbonate and carbonate ions, and the activity of carbonic anhydrase (CA) and alkaline phosphatase (ALP) were determined. X-ray powder diffraction (XRD), scanning electron microscopy - energy disperse spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning transmission electron microscopy (STEM), and stable carbon isotope analyses were used to characterize the minerals. The obtained biotic minerals were calcite, vaterite, Mg-rich calcite, and aragonite crystals. The crystallinity of aragonite decreased with increasing Mg/Ca ratios. The preferred orientation, diverse morphologies, organic substances, and more negative stable carbon isotope values proved the biogenesis of these carbonate minerals. The presence of Mg in the biotic aragonite crystals was likely related to the acidic amino acids which also facilitated the nucleation of minerals on/in the extracellular polymeric substances (EPS). Mg2+ and Ca2+ ions were able to enter into the YXY2 bacteria to induce intracellular biomineralization. Dynamics simulation using Material Studio software proved that different adsorption energies of Glutamic acid (Glu) adsorbed onto different crystal planes of aragonite led to the preferred orientation of aragonite. This study helps to deepen our understanding of biomineralization mechanisms and may be helpful to distinguish biotic minerals from abiotic minerals.
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Wolff, Annalena, Walid Hetaba, Marco Wißbrock, Stefan Löffler, Nadine Mill, Katrin Eckstädt, Axel Dreyer i in. "Oriented attachment explains cobalt ferrite nanoparticle growth in bioinspired syntheses". Beilstein Journal of Nanotechnology 5 (28.02.2014): 210–18. http://dx.doi.org/10.3762/bjnano.5.23.
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Oriented attachment has created a great debate about the description of crystal growth throughout the last decade. This aggregation-based model has successfully described biomineralization processes as well as forms of inorganic crystal growth, which could not be explained by classical crystal growth theory. Understanding the nanoparticle growth is essential since physical properties, such as the magnetic behavior, are highly dependent on the microstructure, morphology and composition of the inorganic crystals. In this work, the underlying nanoparticle growth of cobalt ferrite nanoparticles in a bioinspired synthesis was studied. Bioinspired syntheses have sparked great interest in recent years due to their ability to influence and alter inorganic crystal growth and therefore tailor properties of nanoparticles. In this synthesis, a short synthetic version of the protein MMS6, involved in nanoparticle formation within magnetotactic bacteria, was used to alter the growth of cobalt ferrite. We demonstrate that the bioinspired nanoparticle growth can be described by the oriented attachment model. The intermediate stages proposed in the theoretical model, including primary-building-block-like substructures as well as mesocrystal-like structures, were observed in HRTEM measurements. These structures display regions of substantial orientation and possess the same shape and size as the resulting discs. An increase in orientation with time was observed in electron diffraction measurements. The change of particle diameter with time agrees with the recently proposed kinetic model for oriented attachment.
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Jiang, Wenge, Xiaobin Chu, Ben Wang, Haihua Pan, Xurong Xu i Ruikang Tang. "Biomimetically Triggered Inorganic Crystal Transformation by Biomolecules: A New Understanding of Biomineralization". Journal of Physical Chemistry B 113, nr 31 (6.08.2009): 10838–44. http://dx.doi.org/10.1021/jp904633f.
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Heywood, Brigid R. "Biomineralization:New directions in crystal science". Proceedings, annual meeting, Electron Microscopy Society of America 50, nr 2 (sierpień 1992): 1026–27. http://dx.doi.org/10.1017/s0424820100129760.
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The development of effective protocols for the reproducible control of crystal structure, size and morphology is attracting considerable interest given the requirement for particles of modal size and shape in many areas of materials fabrication and the importance of crystallochemical selectivity in determining the exploitable properties (eg. optical, magnetic, electrokinetic) of inorganic solids. In biological systems their are many examples of advanced “crystal engineering” in which inorganic solids are deposited in a highly controlled manner to produce mineral phases that are unique with respect to their structure, habit, and uniformity of size (Figures 1 & 2). The crystallochemical specificity of such biogenic solids (eg. calcium phosphates, calcium carbonates, iron oxides, barium and strontium sulphates) is tailored to a wide variety of both structural (eg. bones and teeth) and non-structural roles. Examples of the latter include pH homeostasis, the transduction of magnetic signals and inertial detection.A review of biomineralization will show that while a complex array of strategies have evolved for regulating the formation of crystalline phases, one feature is common to the continuum of mechanisms; interactions between organized biopolymeric assemblies and the nascent inorganic solids play a fundamental role in controlling the deposition of the biomineral.
Części książek na temat "Inorganic Crystal (Biomineralization)"
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Bunker, Bruce C., i William H. Casey. "Bio-inspired Synthesis of Oxide Nanostructures". W The Aqueous Chemistry of Oxides. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199384259.003.0015.
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Nature is capable of building magnificently intricate and detailed structures out of otherwise boring materials such as calcium carbonate and silica. Anyone who has taken their children to see dinosaurs at a Natural History museum or visited natural wonders such as the Petrified Forest in Arizona are familiar with the natural process called fossilization by which the tissues of dead organisms are eventually replicated by objects of stone. Most living organisms (including humans) are critically dependent on more deliberate and controlled biomineralization phenomena that lead to the production of all hard tissues, including our teeth and bones, seashells and diatom skeletons, egg shells, and the magnetic nanoparticles that provide homing devices from bacteria to birds. All these processes are nothing more than specific examples of highly controlled nucleation and growth phenomena such as those described in generic terms in Chapter 7. At a molecular level, these processes are controlled by the same reaction mechanisms involving oxide surfaces, which were outlined in Chapter 6. However, biomineralization is orders of magnitude more sophisticated than standard nucleation and growth processes. The unique features of biomineralization involve the interplay between organic biomolecules and the nucleation and growth of inorganic phases such as oxides. This interplay is of critical importance in both biology and emerging nanotechnologies, providing specific examples that illustrate many of the concepts of oxide chemistry introduced in Chapters 5 through 7. In this chapter, we highlight the key concepts of biomineralization and provide examples of how researchers can now produce complex nanostructured oxides via biomimetic nucleation and growth strategies that replicate some of the key features used to make hard tissues in living systems. These strategies include the use of (1) molecular complexation and compartmentalization to control supersaturation levels, (2) specific ligands and surface structures to mediate nucleation phenomena, (3) hierarchical self-assembled organic architectures as templates for oxide formation, (4) functionalization to stimulate desired heterogeneous nucleation and growth processes on those templates, and (5) organic surfactants to manipulate both crystal-phase preferences and growth habits.
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Jolivet, Jean-Pierre. "Iron Oxides: An Example of Structural Versatility". W Metal Oxide Nanostructures Chemistry. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190928117.003.0010.
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Iron is Earth’s fourth most widespread element (6.2% in mass), behind oxygen, silicon, and aluminum. It exists mostly as ferric oxide and oxyhydroxide (Fig. 7.1a) and to a lesser extent as sulfide (pyrite), carbonate (siderite), and silicate (fayalite). Iron oxides are largely used in technological areas such as metallurgy, colored pigments, magnetic materials, and catalysts. They also play an important role in the environment because the dissolution of ferric oxides in natural waters, promoted by acid–base, redox, photochemical phenomena, and also microbial mediation, allows iron to be involved in many biogeochemical processes. Iron is present in many living organisms such as plants, bacteria, mollusks, animals, and humans in various forms: . . . Porphyrinic complexes of iron, which are active centers of hemoglobin and several ferredoxins involved in biological functions, especially respiration mechanism and photosynthesis. Nanoparticles of amorphous ferric oxyhydroxides in animal and human organisms as ferritin, which allows regulation and storage of iron and in various nanophases present in plants as phytoferritin. Crystalline iron oxy(hydroxi)des produced by biomineralization processes. Goethite, lepidocrocite, and magnetite are the main constituents of radulas and the teeth of mollusks (limpets, chitons). Magnetite nanoparticles produced by magnetotactic bacteria (Fig. 7.1b), as well as by bees and pigeons, are used for purposes of orientation and guiding along the lines of force of the Earth’s magnetic field. Green rusts are also ferric- ferrous compounds belonging to the biogeochemical cycle of iron. . . . The crystal chemistry of iron oxy(hydroxi)des is very rich. The ferric, ferrous, and mixed ferric- ferrous oxygenated compounds correspond to around a dozen crystal structural types (Fig. 7.2). Most of these crystal phases can be synthesized from solutions in the laboratory, giving rise to a most diversified chemistry. They are also formed in nature because of the large variability of physicochemical conditions: an acidity range from around pH 0 to 13; redox conditions from oxic to totally anoxic media; bacterial activity that can be extremely intense; salinity largely varying from almost pure waters to real brines; presence of many organic and inorganic ligands; and various photochemical processes.