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Vasilyeva MS, Lukiyanchuk IV, Yarovaya TP, Arefieva OD, Shchitovskaya EV. Plasma electrolytic synthesis and characterization of pH-sensitive TiO2-ZrO2-ZrTiO4-CeOx films on titanium. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05306-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Vasilyeva MS, Lukiyanchuk IV, Shchitovskaya EV, Golushko AD, Kondrikov NB. Plasma Electrolytic Formation and Photoelectrochemical Properties of Zr- and/or Ce-Containing Oxide Layers on Titanium. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622090182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang W, Xu P, Cheng Y, Yang Y, Mao Q, Chen Z. Preparation of a nanopearl powder/C-HA (chitosan-hyaluronic acid)/rhBMP-2 (recombinant human bone morphogenetic protein-2) composite artificial bone material and a preliminary study of its effects on MC3T3-E1 cells. Bioengineered 2022; 13:14368-14381. [PMID: 35758269 PMCID: PMC9342380 DOI: 10.1080/21655979.2022.2085394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A nanopearl powder/C-HA (chitosan-hyaluronic acid)/rhBMP-2 (recombinant human bone morphogenetic protein-2) composite artificial bone material was prepared, and its biological properties were evaluated. The nanopearl powder/C-HA/rhBMP-2 composite porous artificial bone material was prepared using the freeze-drying method after the nanopearl powder was prepared using mechanical ball milling. The particle was measured with a transmission electron microscope, its surface morphology and pore size were observed under a scanning electron microscope. The porosity of the artificial bone was determined using pycnometry, a compression performance test was conducted with a universal testing machine, and XRD (X-ray diffraction) patterns were recorded to examine the crystal form of the pearl powder in the composite artificial bone. Finally, the artificial bone was cocultured with mouse MC3T3-E1 cells to investigate its effects on cell proliferation and differentiation and the expression of osteogenesis-related genes. The pearl powder prepared in this experiment had a particle size in the nanometer range. This nanopearl powder, along with C-HA and rhBMP-2, was compounded into the nanopearl powder/C-HA/rhBMP-2 composite artificial bone, showing pore sizes of 188.53 ± 15.32 μm, a porosity of 86.43 ± 2.78% and a compressive strength of 0.342 ± 0.024 MPa. Notably, rhBMP-2 was released from the artificial bone in a sustained manner. Moreover, this artificial bone promoted the adhesion, proliferation, and differentiation of MC3T3-E1 cells and upregulated the expression of ColαI (collagen α1), OCN (osteocalcin), OPN (osteopontin) and Runx2 (runt-related gene 2). Conclusively, this nanopearl powder/C-HA/rhBMP-2 composite artificial bone material showed good performance and cytocompatibility, suggesting that it can be used for bone tissue engineering.
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Affiliation(s)
- Wenbo Zhang
- Department of Periodontitis, Affiliated Haikou Hospital, Xiangya Medical School, Central South University • Hainan Provincial Stomatology Centre, Haikou, Hainan, China
| | - Pu Xu
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University Hainan Provincial Stomatology Centre, Haikou, Hainan, China
| | - Yanan Cheng
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University Hainan Provincial Stomatology Centre, Haikou, Hainan, China
| | - Yanlan Yang
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University Hainan Provincial Stomatology Centre, Haikou, Hainan, China
| | - Qiuhua Mao
- Department of Periodontitis, Affiliated Haikou Hospital, Xiangya Medical School, Central South University • Hainan Provincial Stomatology Centre, Haikou, Hainan, China
| | - Zuogeng Chen
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University Hainan Provincial Stomatology Centre, Haikou, Hainan, China
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Influence of Pore Size and Fatigue Loading on NaCl Transport Properties in C-S-H Nanopores: A Molecular Dynamics Simulation. MATERIALS 2020; 13:ma13030700. [PMID: 32033156 PMCID: PMC7040904 DOI: 10.3390/ma13030700] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/28/2020] [Accepted: 02/03/2020] [Indexed: 11/17/2022]
Abstract
The transport properties of chloride ions in cement-based materials are one of the major deterioration mechanisms for reinforced concrete (RC) structures. This paper investigates the influence of pore size and fatigue loading on the transport properties of NaCl in C-S-H nanopores using molecular dynamics (MD) simulations. Molecular models of C-S-H, NaCl solution, and C-S-H nanopores with different pore diameters are established on a microscopic scale. The distribution of the chloride ion diffusion rate and the diffusion coefficient of each particle are obtained by statistically calculating the variation of atomic displacement with time. The results indicate that the chloride ion diffusion rate perpendicular to C-S-H nanopores under fatigue loading is 4 times faster than that without fatigue loading. Moreover, the diffusion coefficient of water molecules and chloride ions in C-S-H nanopores increases under fatigue loading compared with those without fatigue loading. The diffusion coefficient of water molecules in C-S-H nanopores with a pore size of 3 nm obtained from the MD simulation is 1.794 × 10−9 m2/s, which is slightly lower than that obtained from the experiment.
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