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Zinc has been shown to increase bone mass and promote bone cell proliferation and differentiation. We, therefore, hypothesized that zinc might be cytoprotective for bone cells during oxidative stress. The cells were divided into H2O2, zinc and zinc + H2O2 groups. In the present study, zinc was found to inhibit H2O2-induced apoptosis in MC3T3-E1 cells, as(More)
Mobile Ad hoc network is a self-organizing, multi-hop and wireless network. This kind of networking is convenient to construct because it is free of time and space and it can be constructed without infrastructure. It has been widely used on many occasions such as danger zones, military regions, hospital and family. Due to the dynamic changes of topology, Ad(More)
In order to dynamically construct 3d models in the virtual modeling, a method based on OpenGL is used in this paper. By introducing how to use OpenGL to build three-dimensional geometric model and texture mapping using two-dimensional image constructed a virtual three-dimensional model described in VC++6.0. It depends on the typical geomentric texture(More)
Proper smoke control design is an important aspect in the operating security of ultra-long railway tunnels. Taihang Mountain Tunnel on Shijiazhuang-Taiyuan Passenger Specified Railway is investigated as a typical case. The numerical model representing the smoke control design and fire scenarios is set up, based on which the smoke motion and the efficiency(More)
In this paper, McCaffrey plume model is introduced to calculate convection heat flux to large span steel structure during fire, and a critical temperature is defined, below which the stress calculation could be omitted. It's also suggested that the impact of the failure of a certain section on the whole structure should be considered. Such method is applied(More)
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