A γ - type of layered zirconium hydrogen phosphate, Zr(HPO 4) 2·2H 2O( γ ZrP), was synthesized under hydrothermal conditions and characterized by powder X ray diffraction and thermogravimetric analysis....A γ - type of layered zirconium hydrogen phosphate, Zr(HPO 4) 2·2H 2O( γ ZrP), was synthesized under hydrothermal conditions and characterized by powder X ray diffraction and thermogravimetric analysis. The temperature dependence of the proton conductivity in γ ZrP was investigated in a temperature range of 23￣413 ℃ by ac impedance spectroscopy. The variation of the conductivity with water loss and phase transitions was observed. The best proton conductivity in γ ZrP is 6×10 -4 S·cm -1 at 60 ℃. The proton conductivities in the dehydrated sample are ￣10 -5 at 150 ℃ and ￣10 -4 S·cm -1 at 350 ℃, respectively. The conductivities as a function of humidity in the temperature range of 120￣200 ℃ were measured.展开更多
This paper establishes the Razumikhin-type theorem on stability for neutral stochastic functional differential equations with unbounded delay. To overcome difficulties from unbounded delay, we develop several differen...This paper establishes the Razumikhin-type theorem on stability for neutral stochastic functional differential equations with unbounded delay. To overcome difficulties from unbounded delay, we develop several different techniques to investigate stability. To show our idea clearly, we examine neutral stochastic delay differential equations with unbounded delay and linear neutral stochastic Volterra unbounded-delay-integro-differential equations.展开更多
Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants rat...Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants ratio, reaction temperature and time, and the dosage of catalyst, were determined. At the optimum reaction condition the product yield reached 78.42%, which is higher than that reported in the literatures.展开更多
目的:探究2型糖尿病肾病(DN)患者外周血白细胞介素-4(IL-4)、γ-干扰素(INF-γ)、纤溶抑制物(TAFI)表达及其与肾小球滤过功能的相关性。方法:比较分析糖尿病肾病组(n=102)与健康组(n=54)的IL-4、INF-γ及TAFI表达水平;将糖尿病肾病组分...目的:探究2型糖尿病肾病(DN)患者外周血白细胞介素-4(IL-4)、γ-干扰素(INF-γ)、纤溶抑制物(TAFI)表达及其与肾小球滤过功能的相关性。方法:比较分析糖尿病肾病组(n=102)与健康组(n=54)的IL-4、INF-γ及TAFI表达水平;将糖尿病肾病组分为3组,比较分析3组患者的IL-4、INF-γ及TAFI表达水平;采用Spearman分析IL-4、INF-γ及TAFI表达水平与2型DN患者肾小球滤过功能的相关性。结果:糖尿病肾病组IL-4、INF-γ及TAFI水平高于健康组(P<0.05);不同肾功能损伤程度患者IL-4、INF-γ及TAFI比较,差异有统计学意义(P<0.05);Spearman相关性分析结果显示,IL-4与24 h UmAlb负相关(P<0.05),与eGFR、Scr无相关性(P>0.05);INF-γ与eGFR负相关,与Scr、24 h UmAlb正相关(P<0.05);TAFI与eGFR负相关,与Scr、24 h UmAlb正相关(P<0.05)。结论:2型DN患者外周血IL-4、INF-γ及TAFI表达水平与患者的肾小球滤过功能存在相关性,可通过检测外周血IL-4、INF-γ及TAFI的表达水平为2型DN患者肾小球滤过功能的评估和临床治疗提供参考。展开更多
文摘A γ - type of layered zirconium hydrogen phosphate, Zr(HPO 4) 2·2H 2O( γ ZrP), was synthesized under hydrothermal conditions and characterized by powder X ray diffraction and thermogravimetric analysis. The temperature dependence of the proton conductivity in γ ZrP was investigated in a temperature range of 23￣413 ℃ by ac impedance spectroscopy. The variation of the conductivity with water loss and phase transitions was observed. The best proton conductivity in γ ZrP is 6×10 -4 S·cm -1 at 60 ℃. The proton conductivities in the dehydrated sample are ￣10 -5 at 150 ℃ and ￣10 -4 S·cm -1 at 350 ℃, respectively. The conductivities as a function of humidity in the temperature range of 120￣200 ℃ were measured.
基金Supported by NSFC (11001091)Chinese UniversityResearch Foundation (2010MS129)
文摘This paper establishes the Razumikhin-type theorem on stability for neutral stochastic functional differential equations with unbounded delay. To overcome difficulties from unbounded delay, we develop several different techniques to investigate stability. To show our idea clearly, we examine neutral stochastic delay differential equations with unbounded delay and linear neutral stochastic Volterra unbounded-delay-integro-differential equations.
基金support from the National Natural Science Foundation of China(No.50473036)
文摘Methyl-（γ-chloropropyl）dichlorosilane was synthesized under the catalysis of a silicasupported Karstedt-type catalyst. By orthogonal experimental design method, the optimum reaction parameters such as reactants ratio, reaction temperature and time, and the dosage of catalyst, were determined. At the optimum reaction condition the product yield reached 78.42%, which is higher than that reported in the literatures.
文摘目的:探究2型糖尿病肾病(DN)患者外周血白细胞介素-4(IL-4)、γ-干扰素(INF-γ)、纤溶抑制物(TAFI)表达及其与肾小球滤过功能的相关性。方法:比较分析糖尿病肾病组(n=102)与健康组(n=54)的IL-4、INF-γ及TAFI表达水平;将糖尿病肾病组分为3组,比较分析3组患者的IL-4、INF-γ及TAFI表达水平;采用Spearman分析IL-4、INF-γ及TAFI表达水平与2型DN患者肾小球滤过功能的相关性。结果:糖尿病肾病组IL-4、INF-γ及TAFI水平高于健康组(P<0.05);不同肾功能损伤程度患者IL-4、INF-γ及TAFI比较,差异有统计学意义(P<0.05);Spearman相关性分析结果显示,IL-4与24 h UmAlb负相关(P<0.05),与eGFR、Scr无相关性(P>0.05);INF-γ与eGFR负相关,与Scr、24 h UmAlb正相关(P<0.05);TAFI与eGFR负相关,与Scr、24 h UmAlb正相关(P<0.05)。结论:2型DN患者外周血IL-4、INF-γ及TAFI表达水平与患者的肾小球滤过功能存在相关性,可通过检测外周血IL-4、INF-γ及TAFI的表达水平为2型DN患者肾小球滤过功能的评估和临床治疗提供参考。
