A5037324544- Bone Tissue Engineering Materials
- Calcium Carbonate Crystallization and Inhibition
- Crystallization and Solubility Studies
- Dental materials and restorations
- nanoparticles nucleation surface interactions
- Dental Implant Techniques and Outcomes
- Solidification and crystal growth phenomena
- Minerals Flotation and Separation Techniques
- Force Microscopy Techniques and Applications
- Mineralogy and Gemology Studies
- Bone and Dental Protein Studies
- Enzyme Structure and Function
- Protein Interaction Studies and Fluorescence Analysis
- Polymer Surface Interaction Studies
- Chemical Synthesis and Characterization
- Periodontal Regeneration and Treatments
- Enzyme Production and Characterization
- Advanced Condensed Matter Physics
- Dental Erosion and Treatment
- Crystal Structures and Properties
- Solid-state spectroscopy and crystallography
- Geological and Geochemical Analysis
- Proteins in Food Systems
- Surfactants and Colloidal Systems
- Orthopaedic implants and arthroplasty
Tsurumi University
2020-2025
National Institute of Advanced Industrial Science and Technology
2013-2024
Kyoto University
1999-2013
Johns Hopkins University
2013
The University of Tokyo
2013
Mineralogical Society of America
2010
Maruwa Foods and Biosciences (Japan)
2009
Japan Chemical Industry Association
2003
American Chemistry Council
2003
European Chemical Industry Council
2003
An intensity-enhanced dynamic light scattering technique revealed the presence of calcium phosphate clusters from 0.7 to 1.0 nm in size a simulated body fluid. The were also present fluids undersaturated with respect octacalcium and amorphous phosphates supersaturated only hydroxyapatite. These are growth unit hydroxyapatite judging fact that grows by step flow 0.8 or 1.6 height probability incorporation into crystal is extremely low, as previously. We propose cluster model where selective...
Abstract Simulated body fluid (SBF) with ion concentrations approximately equal to those of human blood plasma has been widely used for the in vitro assessment bioactivity artificial materials and formation bonelike apatite on various substrates. Ion conventional SBF (c‐SBF) are, however, not exactly plasma, hence formed c‐SBF is same as bone its composition structure. Recently, present authors prepared new kinds SBFs (r‐SBF, i‐SBF, m‐SBF) nearer plasma. The r‐SBF i‐SBF have total...
An animal's hard tissue is mainly composed of crystalline calcium phosphate. In vitro, small changes in the reaction conditions affect species phosphate formed, whereas, vivo, distinct types are formed a well-controlled spatiotemporal-dependent manner. A variety proteins involved hard-tissue formation; however, mechanisms by which they regulate crystal growth not yet fully understood. Clarification these will only lead to development new therapeutic regimens but also provide guidance for...
The effect of magnesium and zinc on the growth kinetics a hydroxyapatite (0001) face in pseudophysiological solutions was investigated. rates were measured under various concentrations or using Moire phase shift interferometry coupled with surface observation by atomic force microscopy. grew not spiral mode but multiple two-dimensional nucleation mode. It shown that lateral islands inhibited addition zinc, following an inhibition normal rate face. Although both cations growth, found to...
Using magnetic, thermal and neutron measurements we show that Rb4Mn(MoO4)3 is a quasi-2D triangular Heisenberg antiferromagnet with easy-axis anisotropy successive transitions bracketing an intermediate collinear phase. An accurate quantitative account of the phase diagram achieved through Monte Carlo simulation spin Hamiltonian D=0.22J.
As fluoride is known to affect the biomineralization of calcium phosphates, we examined how growth at 37 °C octacalcium phosphate (OCP) and hydroxyapatite (HAp) on an amorphous substrate affected by low-dose (0–2 ppm) in metastable solution. In absence fluoride, highly oriented plate-like OCP crystals grow substrate. With 0.7–0.8 ppm crystal formation was greatly modulated (the were smaller their orientation lower); moreover, tiny plates needles appeared plates. There two critical...
Using zinc-containing tricalcium phosphate (ZnTCP) as the zinc carrier for zinc-releasing calcium ceramic implants promoted bone formation around implants. Because no quantitative information was available on equilibrium solubility and resorbability of ZnTCP, in vitro vivo ZnTCP were determined compared quantitatively this study. The decreased with increasing content. negative logarithm product (K(sp)) expressed pK(sp) = 28.686 + 1.7414C - 0.42239C(2) 0.063911C(3) 0.0051037C(4) 0.0001595C(5)...
The stability of calcium phosphate clusters approximately 0.8 nm in diameter, which were found a simulated body fluid previous work, was investigated the system CaCl2−H3PO4−KCl−H2O using an intensity-enhanced dynamic light-scattering technique at 25 °C. It shown that tris(hydroxymethyl)aminomethane, used as buffer study, had no effect on formation clusters. amount decreased with decreasing supersaturation solution respect to hydroxyapatite. Under constant hydroxyapatite, reached maximum...
Using ab initio methods, a single isomer of D3h symmetry was found to be preeminent on the Ca3(PO4)2 cluster potential energy surface. This has distinct feature that each calcium atom is surrounded by four oxygen atoms. We studied aggregation this in [Ca3(PO4)2]n systemwith n being 2 or 3. gives us an reference for analyzing stability so-called Posner's Ca9(PO4)6 which core actual structural model amorphous phosphate. shown significantly stabilized comparison reference.
Our single crystal study reveals that the single-layer S=2 triangular Heisenberg antiferromagnet FeGa2S4 forms a frozen spin-disordered state, similar to S=1 isostructural magnet NiGa2S4. In this magnetic specific heat C{M} is not only insensitive field, but shows T2 dependence scales of NiGa2S4, suggesting same underlying mechanism 2D coherent behavior. contrast, bilayer system Fe2Ga2S5 exhibits 3D antiferromagnetic order.
Mesoporous bioactive glass (MBG) coatings with SiO2 : CaO P2O5 mol ratio of 100 0 0, 80 15 5 and 70 25 a tunable pore size structure were prepared on stainless steel plate by spin-coating sol solutions containing triblock copolymer the inorganic precursors. The calcium content in MBG affected mesoporous structure. With increase content, crystallinity increased thus Brunauer–Emmett–Teller (BET) surface area volume decreased. evaluated basis protein adsorption, cell attachment, proliferation,...