Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room tempe...Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room temperature. The infrared emission at 1538 nm and visible emissions at 520–569 and 640–670 nm, corresponding to 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ ions, were simultaneously observed in Er3+/Yb3+:LiLa(MoO4)2 crystals under 976 nm excitation at room temperature. The maximal emiss...展开更多
The Loxahatchee Impoundment Landscape Assessment （LILA） facility is a unique physical model of the Everglades ecosystem. LILA has a closed-loop water delivery system and consists of four 0.08 square kilometer （-8 h...The Loxahatchee Impoundment Landscape Assessment （LILA） facility is a unique physical model of the Everglades ecosystem. LILA has a closed-loop water delivery system and consists of four 0.08 square kilometer （-8 ha） macrocosms, created to be replicates of one another and of the Everglades landscape. Built in 2003, LILA＇s purpose is to provide scientists with an opportunity to design and implement research concerning Everglades restoration techniques in an accessible, controlled and replicated Everglades environment. Key Everglades habitats were sculpted within LILA： tree islands, ridges, sloughs and alligator holes. Water levels and flows in each macrocosm are controlled independently, so that researchers can study the effects of hydrology on Everglades landscape and ecology. Studies have focused upon measuring survival and growth of native trees planted on the tree islands; measuring surface water and ground water movement and chemistry; studying wading bird feeding and the movement of prey species （crayfish）; and measuring erosion and accretion on tree islands and ridges. We developed a Geographic Information System （GIS） data set to identify, characterize, and spatially reference the features of LILA and document research activities. This development included mapping the boundaries of the landscape features, creating a theoretical Digital Elevation Model （DEM） and describing the research projects being carried out. The creation of this GIS data set enhances the ability to schedule and coordinate research, assist scientists in the visualization and spatial representation of their research, and provide a resource for the storage, analysis and synthesis of valuable scientific information.展开更多
基金This work supported by the Natural Science Foundation of Fujian Province (No.60378031)Key Project of Science andTechnology of Fujian Province (No.2001F004).
基金Project supported by the National Natural Science Foundation of China (60808033) Natural Science Foundation of Jiangxi Province (2008GZW0012)
文摘Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room temperature. The infrared emission at 1538 nm and visible emissions at 520–569 and 640–670 nm, corresponding to 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ ions, were simultaneously observed in Er3+/Yb3+:LiLa(MoO4)2 crystals under 976 nm excitation at room temperature. The maximal emiss...
文摘The Loxahatchee Impoundment Landscape Assessment （LILA） facility is a unique physical model of the Everglades ecosystem. LILA has a closed-loop water delivery system and consists of four 0.08 square kilometer （-8 ha） macrocosms, created to be replicates of one another and of the Everglades landscape. Built in 2003, LILA＇s purpose is to provide scientists with an opportunity to design and implement research concerning Everglades restoration techniques in an accessible, controlled and replicated Everglades environment. Key Everglades habitats were sculpted within LILA： tree islands, ridges, sloughs and alligator holes. Water levels and flows in each macrocosm are controlled independently, so that researchers can study the effects of hydrology on Everglades landscape and ecology. Studies have focused upon measuring survival and growth of native trees planted on the tree islands; measuring surface water and ground water movement and chemistry; studying wading bird feeding and the movement of prey species （crayfish）; and measuring erosion and accretion on tree islands and ridges. We developed a Geographic Information System （GIS） data set to identify, characterize, and spatially reference the features of LILA and document research activities. This development included mapping the boundaries of the landscape features, creating a theoretical Digital Elevation Model （DEM） and describing the research projects being carried out. The creation of this GIS data set enhances the ability to schedule and coordinate research, assist scientists in the visualization and spatial representation of their research, and provide a resource for the storage, analysis and synthesis of valuable scientific information.
文摘目的探讨药物利拉鲁肽对2型糖尿病患者C-肽水平的影响。方法采用酶联免疫法测定T2DM患者及正常人C-肽水平,分析空腹血糖、血糖、糖化血红蛋白、C肽(空腹、餐后l h、餐后2 h)等指标,调整剂量FPG,观察利拉鲁肽治疗前后24周以上T2DM患者血浆C-肽水平变化,并分析结果。结果治疗组和对照组患者治疗前FPG、2PhPG、H bIAC明显高于正常组(P<0.1),C肽(空腹、餐后l h、餐后2 h)低于正常组(P<0.1)。治疗后治疗组和对照组FPG、2 h PPG、H bI AC明显下降均已达标,与治疗前相比有显著差异(P<0.5),且治疗组下降幅度明显优于对照组(P<0.5)。治疗后、治疗组C肽与治疗前相比明显提高(P<0.1),对照组C肽较治疗前亦提高(P<0.5),且治疗组明显高于对照组(P<0.5)。结论利拉鲁肤不仅有降血糖,减轻体重,低血糖风险低,有利于维持血糖稳定,最主要是显著调节胰岛细胞功能,促进胰岛p细胞新生及分化,减少胰岛日细胞凋亡,从而增加胰岛细胞数量,增加C-肽分泌。
