Characterization of Amino Terminated Hyperbranched Collagen Fiber and Adsorption Thermodynamics to Cr(Ⅵ)

In this study, a novel adsorption material amino terminated hyperbranched polyamide collagen fiber( CF-HBPN)was prepared by loading amino terminated hyperbranched polyamide( HBPN) which was synthesized by polycondensation of methacrylate and diethylenetriamine onto the surface of collagen fiber( CF) with glutaraldehyde as the cross-linking agent. X-ray photoelectron spectroscopy( XPS) and thermogravimetric analysis( TGA) were employed to characterize the structures of CF and CFHBPN. In addition,the adsorption property of CF-HBPN toward Cr( Ⅵ) and adsorption thermodynamic were studied as well. The experimental results indicated that the Cr( Ⅵ) 's removal rate by CF-HBPN was 3. 09 higher than that of CF under the same conditions. Langmuir single layer adsorption model was found more suitable to describe the adsorption process than Freundlich adsorption model. The adsorption process was an endothermic reaction. The adsorption efficiency was enhanced with the increase of temperature. X-ray diffraction( XRD) was employed to elucidate the difference between CF-HBPN and Cr( Ⅵ) loaded CF-HBPN[CF-HBPN-Cr( Ⅵ) ].

Study on university teachers＇ career development complying with the connotative development in Shanxi province Taking young English teacher from Shaanxi University of Science and Technology for example

With the development of higher education in China, the social responsibility undertaken by higher education is becoming more and more obvious and knowledge innovation in universities, scientific research, teaching and others have played an important role for social and economic development. And the agent and practitioner of all the nature and content of these are teachers in universities and colleges which are the main power of education, teaching and research. Highly qualified team of teachers have an important value for higher education. New mode of higher education has also undergone a significant change from denotative growth gradually to connotative development concerning over personnel training and teaching quality, which bring up more requirements for the quality and ability of university teachers. Thus we will put forward a comprehensive analysis of how to comply with cormotative development and come up with new strategy of teachers＇ pro fessional development.