Fluoride nanoparticles with multiform crystal structures and morphologies were successfully synthesized by a facile, effective, and environmentally friendly coprecipitation method. Transmission electron microscopy (TE...Fluoride nanoparticles with multiform crystal structures and morphologies were successfully synthesized by a facile, effective, and environmentally friendly coprecipitation method. Transmission electron microscopy (TEM) was used to characterize the nanoparticles. The nanoparticles were modified by PEI, CTAB, PAA and Ci, respectively. It was feasible for function by -COOH and -NH2 groups, due to the surface modification. Moreover, different surface modifications of the nanoparticles were examined. The possible formation mechanisms for fluoride nanoparticles with surface modification were presented in detail. More importantly, it is expected to be widely applied to biomedicine.展开更多
One-day-old healthy ducklings(n=100)were divided into control group and experimental group randomly, and selenium poisoning of ducklings was artificially caused by feeding ration containing 8 mg kg-1 Se every day. The...One-day-old healthy ducklings(n=100)were divided into control group and experimental group randomly, and selenium poisoning of ducklings was artificially caused by feeding ration containing 8 mg kg-1 Se every day. The dynamic changes of No content and NOS activity in the serum and tissues were determined by means of the method of nitric acid reductase. Results showed that the NO content and NOS activity in serum and tissues in experimental group increased significantly(P<0. 05)and they were time-dependent. It was suggested that the high level of selenium in bodies could increase the NOS activity and NO content as it destroyed the metabolism of material and energy as well as structure and function of tissues and cells. These changes of NO content and NOS activity might be involved in the metabolism of selenium poisoning.展开更多
"Promoting green development and realizing the harmonious coexistence of man and nature" is an important goal of the countrys "14 Five Year Plan". Whether this goal can be achieved will directly af..."Promoting green development and realizing the harmonious coexistence of man and nature" is an important goal of the countrys "14 Five Year Plan". Whether this goal can be achieved will directly affect the transformation of Chinas economic and social development mode. The focus of this paper is based on the analysis of the current situation and challenges of green finance under the background of carbon peaking and carbon neutralization. On this basis, it puts forward some reference measures for the future development of green finance in China to help China achieve the goal of carbon peaking and carbon neutralization as soon as possible.展开更多
基金Funded by the Natural Science Foundation of Shaanxi Province(No.2018JQ2057)Shaanxi Provincial Education Department(No.17JK0151)Ph D Research Foundation Project of Shaanxi University of Technology(No.209020195)
文摘Fluoride nanoparticles with multiform crystal structures and morphologies were successfully synthesized by a facile, effective, and environmentally friendly coprecipitation method. Transmission electron microscopy (TEM) was used to characterize the nanoparticles. The nanoparticles were modified by PEI, CTAB, PAA and Ci, respectively. It was feasible for function by -COOH and -NH2 groups, due to the surface modification. Moreover, different surface modifications of the nanoparticles were examined. The possible formation mechanisms for fluoride nanoparticles with surface modification were presented in detail. More importantly, it is expected to be widely applied to biomedicine.
文摘One-day-old healthy ducklings(n=100)were divided into control group and experimental group randomly, and selenium poisoning of ducklings was artificially caused by feeding ration containing 8 mg kg-1 Se every day. The dynamic changes of No content and NOS activity in the serum and tissues were determined by means of the method of nitric acid reductase. Results showed that the NO content and NOS activity in serum and tissues in experimental group increased significantly(P<0. 05)and they were time-dependent. It was suggested that the high level of selenium in bodies could increase the NOS activity and NO content as it destroyed the metabolism of material and energy as well as structure and function of tissues and cells. These changes of NO content and NOS activity might be involved in the metabolism of selenium poisoning.
文摘"Promoting green development and realizing the harmonious coexistence of man and nature" is an important goal of the countrys "14 Five Year Plan". Whether this goal can be achieved will directly affect the transformation of Chinas economic and social development mode. The focus of this paper is based on the analysis of the current situation and challenges of green finance under the background of carbon peaking and carbon neutralization. On this basis, it puts forward some reference measures for the future development of green finance in China to help China achieve the goal of carbon peaking and carbon neutralization as soon as possible.
