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At present, trademark as the gold content of the intangible assets will continue to improve

The following measures should be taken to prevent the degradation of trademarks. (1) start from the source, guaranteeing the trademark design; (2) to further improve the relevant legislation, for the prevention of trademark degradation and provide a stronger legal basis; (3) all kinds of trademark subjects should make full use of the existing laws and regulations, to form a three-dimensional cross protection network.

To evaluate the biocompatibility of a new type of nano porous titanium surface. Methods: electron microsco-py scanning (SEM) was used to observe the surface morphology of the materials and the elements of photoelectron spectroscopy X (XPS) were used to analyze the surface morphology of the materials. On rat mesenchymal stem cell proliferation and differentiation in adhesion, surface spreading, were evaluated. Results: the porous structure of the titanium surface was formed on the surface of titanium, and XPS was successfully introduced into the titanium surface.

Pseudopod in novel amino functionalized porous titanium surface, proliferation and differentiation were better than those of other groups. Conclusion: the new amino functionalized porous titanium surface can promote rat bone marrow mesenchymal stem cell adhesion, spreading, proliferation and differentiation.

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