Effect of Osteoblasts Cell Adhesion Behavior on Biomaterial Surfaces by Atomic Force Microscope
Afrina Khan Piya,
Munshi Muhammad Raihan,
Md Alamgir Hossain
Issue:
Volume 5, Issue 1, March 2020
Pages:
1-10
Received:
26 October 2019
Accepted:
29 November 2019
Published:
23 March 2020
Abstract: Atomic force microscopy (AFM) is a great scientific invention that can visualize cell morphology in aqueous environment and provide information to investigate cell biomechanics at a high spatial resolution in a controlled environment with force sensitivity. Contemporary AFM techniques permit solving a number of problems of cell biomechanics due to synchronized evaluation of the local mechanical properties. For characterizing mechanical properties force spectroscopy is used that provides information on cellular structures including cytoskeleton structure and morphology. For the success of biomedical implant, the most crucial factor is biocompatibility and osteo-conductivity of the implant material that can be characterized by the change in mechanical properties of cellular filaments and nucleus determined by exploiting atomic force microscope techniques. Hydroxyapatite is a bioactive material in bio-ceramics, hence used for fillers, bone grafts and metallic implant coating. Recently developed HAp/amino acid fluorescent complexes could be a significant candidate to be used for dental implant, had shown antibacterial properties with visible light irradiation. This study aims at revealing murine osteoblasts cell (MC3T3) adhesion behavior on the HAp coating and HAp/amino acid complexes. The AFM revealed that no significant changes were observed in mechanical properties of the osteoblasts cells when adhered on electrochemically deposited HAp coating and HAp/amino acid ligands complex coating. SEM and EDX analysis revealed cell morphology were identical for HAp and HAp/amino acid ligands complex coating. Such characteristics are desirable for the success of implant biomaterial coating that can preserve both antibacterial property and cell adhesion behavior.
Abstract: Atomic force microscopy (AFM) is a great scientific invention that can visualize cell morphology in aqueous environment and provide information to investigate cell biomechanics at a high spatial resolution in a controlled environment with force sensitivity. Contemporary AFM techniques permit solving a number of problems of cell biomechanics due to ...
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Wind Tunnel Test Research on Aerodynamic Characteristics of Iced Conductors
Li Li,
Guo Li,
Huajin Cao
Issue:
Volume 5, Issue 1, March 2020
Pages:
11-19
Received:
5 December 2019
Accepted:
12 December 2019
Published:
1 April 2020
Abstract: Aiming at that the wind tunnel tests on aerodynamic characteristics of iced conductors were not systematic enough, the wind tunnel test for different icing types was conducted to study the aerodynamic characteristics of iced conductors more systematically. It can accounts for the characteristics of structure and wind field. The aerodynamic characteristics of different icing types such as crescent, fan and corona shapes with different icing thickness were obtained, and the effect of mean wind speed, turbulence and two-dimensional flow on aerodynamic characteristics were also investigated. It is concluded that the icing shapes have much effect on aerodynamic characteristics. The aerodynamic characteristics of rigid segment model with crescent-shaped are regular, while these of corona-shaped and fan-shaped have more peaks and troughs. In addition, the aerodynamic instability of iced conductors is more pronounced in turbulence. Furthermore, the wind speed has significant effects on drag coefficient, but the effects on lift coefficient is little.
Abstract: Aiming at that the wind tunnel tests on aerodynamic characteristics of iced conductors were not systematic enough, the wind tunnel test for different icing types was conducted to study the aerodynamic characteristics of iced conductors more systematically. It can accounts for the characteristics of structure and wind field. The aerodynamic characte...
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