Physical and chemical properties of the magnetic nanoparticles coated with oleate have been investigated by means of transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Mossbauer spectroscopy, su...Physical and chemical properties of the magnetic nanoparticles coated with oleate have been investigated by means of transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Mossbauer spectroscopy, superconducting quantum interference device (SQUID) magnetometry, infrared spectra (IR) and the contact angle device. The results show that doped Al ions in Fe3O4 nanoparticles are located on the octahedral sites of the spinel structure. Oleate is coated on the magnetic nanoparticles with two layers by chemical absorbing, the outer layer can be washed away. The wetting of the surface of magnetic nanoparticles coated with monolayer has been changed from hydrophilicity to hydrophobicity, and the nanoparticles can be dispersed very well in some organic solutions.展开更多
This paper mainly introduces the origin of Mongolian medicine diet therapy,classic works of Mongolian medicine diet therapy and clinical conventional diet therapy through literature research,to provide a certain refer...This paper mainly introduces the origin of Mongolian medicine diet therapy,classic works of Mongolian medicine diet therapy and clinical conventional diet therapy through literature research,to provide a certain reference for giving reasonable diet therapy for clinical patients and improving treatment and prognosis research.展开更多
The characteristics of construction projects are firstly large quantities and many professional types. At the same time, due to the long construction period, there will often be a relatively large number of participan...The characteristics of construction projects are firstly large quantities and many professional types. At the same time, due to the long construction period, there will often be a relatively large number of participants. In addition, the involved construction steps are also changeable and complex, which often requires the support of a large number of professional equipment and technical schemes. Because the comprehensive management capabilities of construction enterprises are not the same, the overall performance is mixed, so many safety accidents will inevitably occur, seriously affecting the core interests of employees within the enterprise. In order to fully solve the limitation and influence of safety accidents and effectively eliminate potential safety hazards, we should focus on the analysis of on-site safety management and solve the limitation and influence of various problems, so as to lay a solid foundation for the safe and stable development of the construction industry. In order to ensure that the construction industry can achieve more effective development, this paper will focus on the analysis of common safety problems in the current construction site, and find corresponding solutions, in order to provide relevant reference for relevant units.展开更多
基金Hi-Tech Research and Develop-ment Program of China under the grant No.2002AA302202 the National Natural Scicnce Foundation of China through grant No.20490210.
文摘Physical and chemical properties of the magnetic nanoparticles coated with oleate have been investigated by means of transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Mossbauer spectroscopy, superconducting quantum interference device (SQUID) magnetometry, infrared spectra (IR) and the contact angle device. The results show that doped Al ions in Fe3O4 nanoparticles are located on the octahedral sites of the spinel structure. Oleate is coated on the magnetic nanoparticles with two layers by chemical absorbing, the outer layer can be washed away. The wetting of the surface of magnetic nanoparticles coated with monolayer has been changed from hydrophilicity to hydrophobicity, and the nanoparticles can be dispersed very well in some organic solutions.
文摘This paper mainly introduces the origin of Mongolian medicine diet therapy,classic works of Mongolian medicine diet therapy and clinical conventional diet therapy through literature research,to provide a certain reference for giving reasonable diet therapy for clinical patients and improving treatment and prognosis research.
文摘The characteristics of construction projects are firstly large quantities and many professional types. At the same time, due to the long construction period, there will often be a relatively large number of participants. In addition, the involved construction steps are also changeable and complex, which often requires the support of a large number of professional equipment and technical schemes. Because the comprehensive management capabilities of construction enterprises are not the same, the overall performance is mixed, so many safety accidents will inevitably occur, seriously affecting the core interests of employees within the enterprise. In order to fully solve the limitation and influence of safety accidents and effectively eliminate potential safety hazards, we should focus on the analysis of on-site safety management and solve the limitation and influence of various problems, so as to lay a solid foundation for the safe and stable development of the construction industry. In order to ensure that the construction industry can achieve more effective development, this paper will focus on the analysis of common safety problems in the current construction site, and find corresponding solutions, in order to provide relevant reference for relevant units.
