Papers by Keyword: DDM

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Authors: K. Ito, Masaru Murata, J. Hino, Junichi Tazaki, T. Akazawa, M. Arisue
Abstract: Body fluid permeability and blood compatibility of biomaterials are especially critical properties for regenerative bone therapy [1, 2]. To have a role in bone repair, biomaterials must have the adsorptive performance of various bone growth factors. The bone-inductive property of rabbit dentin was discovered in 1967 [3]. In our previous study, we have been researching the autograft of human demineralized dentin matrices (DDM) as a clinical study [4]. DDM is an acid-insoluble collagenous material. On the other hand, hydroxyapatite (HAp) is a mineralized material. Commercially available HAp block (APACERAM-AX®, 85%-porosity with micropore) has been used as the artificial biomaterial in bone therapy [5]. Bone morphogenetic proteins (BMPs) are the strong hard tissue-inducing factors [6]. In this study, we investigated the existence of BMP-2 and -7, among proteins adsorbed to DDM and HAp, using immunoblottong analyses. The DDM granules and HAp blocks (64mm3) were implanted subcutaneously in 8-week-old Wistar rats, and sacrificed at 2 days after the implantation. Explanted DDM and HAp were homogenized by the ultrasonic procedure in phosphate-buffered saline (PBS) and the adsorbed proteins were separated on a 5-20% sodium dodecyl sulphate (SDS) polyacrylamide gradient gel by electrophoresis. For Western blotting, proteins in the gel were transferred to a polyvinylidene difluoride membrane and detected by anti-BMP-2 monoclonal antibody and anti-BMP-7 monoclonal antibody. BMP-2 and BMP-7 were detected as a major band at 50 kDa among proteins collected from the in vivo implanted DDM and HAp. BMP-2 was detected the second major band at 125 kDa in HAp and both BMP-2 and BMP-7 were detected the some minor bands in DDM and HAp. The bands of BMP-2 were stronger than those of BMP-7 in all. The DDM and HAp adsorbed BMP-2 and BMP-7. These results indicate that DDM is a useful bone substitute as much as HAp, adsorbed to the bone-inducing factors, in the bone engineering field.
Authors: Chuan Xiao, Jun Hong Feng
Abstract: the unstable approach caused by the distortion of glideslope, endangers aircraft in the forms of over-pitching, stalling at low altitude, and exceeding the limitation of descent rate. Aiming at the issues above, this paper presents a glideslope distortion correction model based on the fusion of multi-navigation sensors. Model simulations have been done to prove the effectiveness of the model, and the results show that the correction model can enhance the stability of glideslope effectively.
Authors: You Hui Zhang
Abstract: To ensure the fidelity of the ILS signal, the errors must be strictly controlled. The benchmark calibration flight precision control had very few attentions as the criterion. Therefore, through the computer to build a relatively complete set of airport simulation environment, we can design a control system and intuitive way to monitor the signal used to get rid of a variety of factors lead to errors. This showed the calibration results were unstable. The insightful significance is that this provides a guideline for the visualization and conformity of complex electromagnetic environment.
Authors: Chun Chang Fu
Abstract: Data mining provide us a technical found potential knowledge technical from mass data , the data mining technology is applied to GIS can promote GIS analysis of the data, so as to improve the ability of decision support level. WebGIS is traditional GIS space outspread, current network analysis and decision making support capability are low, the network-based integration of data mining and WebGIS can strengthen the analytical capacity.
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