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In order to achieve in vivo and vitro fluorescence emission and imaging of YOF nanoparticles with high-performance, co-precipitation method was employed to design and fabricate YOF : Yb3+/Er3+ nanoparticles. The phase structure, microstructure, up conversion fluorescence properties and in vivo and vitro fluorescence imaging performance were measured respectively. The results show that the size of the nanoparticles is about 50 nm, and the morphology is between hexagonal and circular; yellow-green light is emitted under 980 nm laser excitation, and the red/green ratio of its upconversion fluorescence spectrum is 3. 287; optimal upconversion fluorescence emission and in vivo and vitro gradient fluorescence imaging performance were achieved. [ABSTRACT FROM AUTHOR]

According to EI A report requirements, the industrial and overhaul waste water of Luojiazhai and Gunziping shall be reinjected into ground via reinjection well after treatment. The distance between natural gas treatment plant of Luojiazhai or Gunziping gas field to reinjection well is far away, so the reliability & feasibility of reinjection wellhead data transmission design is very critical for real-time monitoring of pressure, temperature and flow in reinjection well & pipeline as well as alarming on time when accident happens during reinjection. From the point of design, this paper specified the feasible scenarios of reinjection wellhead data transmission. GPRS wireless data transmission should be the best scenario for this project through comparisons, which might provide some reference for other similar data transmission projects. [ABSTRACT FROM AUTHOR]