Mg-Al LDH film was fabricated on anodized magnesium alloy AZ31 by in-situ growth method.The characteristics of the film were investigated by X-ray diffraction(XRD),Fourier transform infrared(FT-IR),scanning electron m...Mg-Al LDH film was fabricated on anodized magnesium alloy AZ31 by in-situ growth method.The characteristics of the film were investigated by X-ray diffraction(XRD),Fourier transform infrared(FT-IR),scanning electron microscopy(SEM)observation and electrochemical tests.The results showed that the crystallinity of LDH film was increased with reaction time.When the reaction time was more than 12 h,the LDH film had complete crystal layered structure.The anodic oxide film was sealed basically by the growth of LDH nanosheets after 6 h reaction.The corrosion resistance of the films became better with the increasing of reaction time.However,after 12 h reaction,the corrosion resistance of the film decreased.The formation behavior of the Mg-Al LDH film was proposed.That the competitive growth of LDH grains,which contains dissolution and recrystallization,was proposed to explain the change of the growth and corrosion resistance of the Mg-Al LDH film.展开更多
目的观察西藏胡黄连醇提物(ethanol extraction of Picrorhiza scrophulariiflora,EPS)对apoE^(-/-)小鼠动脉粥样硬化的干预机制。方法将30只apoE^(-/-)小鼠随机分为对照组,模型组,EPS低、中、高剂量组和辛伐他汀组,每组5只。分别给予...目的观察西藏胡黄连醇提物(ethanol extraction of Picrorhiza scrophulariiflora,EPS)对apoE^(-/-)小鼠动脉粥样硬化的干预机制。方法将30只apoE^(-/-)小鼠随机分为对照组,模型组,EPS低、中、高剂量组和辛伐他汀组,每组5只。分别给予相应药物灌胃,对照组和模型组给予等体积的蒸馏水,连续灌胃12周。超声和病理切片观察各组主动脉中的斑块形成情况,试剂盒检测血清生化指标,蛋白免疫印迹法和实时荧光定量聚合酶链式反应检测PPARγ和PON1的表达。结果与模型组比较,EPS和辛伐他汀组可以显著减少动脉粥样硬化斑块的形成,降低血清TC,LDL-C,TNF-α,IL-6,MCP-1,MDA水平(P<0.05,P<0.01,P<0.001),显著升高GSH-Px,SOD活性(P<0.01,P<0.001),增加主动脉中PPARγ和PON1的表达显(P<0.001)。结论西藏胡黄连具有改善动脉粥样硬化的功能,其机制可能与上调动脉壁中PPARγ和PON1的表达有关。展开更多
基金Supported by the National Natural Science Foundation of China (51701029, 51531002, 51474043)the National Key Research and Development Program of China (2016YFB0301100)+3 种基金the Chongqing Research Program of Basic Research and Frontier Technology (cstc2016jcyjA0388, cstc2017jcyjBX0040)China Postdoctoral Science Foundation Funded Project (2017M620410, 2018T110942)the Chongqing Postdoctoral Scientific Research Foundation (Xm2017010)the Fundamental Research Funds for the Central Universities (2018CDGFCL005)~~
文摘Mg-Al LDH film was fabricated on anodized magnesium alloy AZ31 by in-situ growth method.The characteristics of the film were investigated by X-ray diffraction(XRD),Fourier transform infrared(FT-IR),scanning electron microscopy(SEM)observation and electrochemical tests.The results showed that the crystallinity of LDH film was increased with reaction time.When the reaction time was more than 12 h,the LDH film had complete crystal layered structure.The anodic oxide film was sealed basically by the growth of LDH nanosheets after 6 h reaction.The corrosion resistance of the films became better with the increasing of reaction time.However,after 12 h reaction,the corrosion resistance of the film decreased.The formation behavior of the Mg-Al LDH film was proposed.That the competitive growth of LDH grains,which contains dissolution and recrystallization,was proposed to explain the change of the growth and corrosion resistance of the Mg-Al LDH film.
文摘目的观察西藏胡黄连醇提物(ethanol extraction of Picrorhiza scrophulariiflora,EPS)对apoE^(-/-)小鼠动脉粥样硬化的干预机制。方法将30只apoE^(-/-)小鼠随机分为对照组,模型组,EPS低、中、高剂量组和辛伐他汀组,每组5只。分别给予相应药物灌胃,对照组和模型组给予等体积的蒸馏水,连续灌胃12周。超声和病理切片观察各组主动脉中的斑块形成情况,试剂盒检测血清生化指标,蛋白免疫印迹法和实时荧光定量聚合酶链式反应检测PPARγ和PON1的表达。结果与模型组比较,EPS和辛伐他汀组可以显著减少动脉粥样硬化斑块的形成,降低血清TC,LDL-C,TNF-α,IL-6,MCP-1,MDA水平(P<0.05,P<0.01,P<0.001),显著升高GSH-Px,SOD活性(P<0.01,P<0.001),增加主动脉中PPARγ和PON1的表达显(P<0.001)。结论西藏胡黄连具有改善动脉粥样硬化的功能,其机制可能与上调动脉壁中PPARγ和PON1的表达有关。
