以脱脂薏苡仁为原料,采用水提醇沉法制备薏苡仁多糖,通过DEAE Sepharose Fast Flow离子交换柱层析,得到薏苡仁多糖CSP1和CSP2 2种组分,结合扫描电镜和红外光谱对其结构进行分析,并通过对氧化应激细胞的保护作用研究其抗氧化活性。结果表...以脱脂薏苡仁为原料,采用水提醇沉法制备薏苡仁多糖,通过DEAE Sepharose Fast Flow离子交换柱层析,得到薏苡仁多糖CSP1和CSP2 2种组分,结合扫描电镜和红外光谱对其结构进行分析,并通过对氧化应激细胞的保护作用研究其抗氧化活性。结果表明:纯化后的薏苡仁多糖CSP1和CSP2总糖含量分别为90.83%和88.66%,蛋白质含量分别为1.403%和0.086%。体外抗氧化试验显示薏苡仁多糖CSP1和CSP2能提高H_(2)O_(2)诱导的WRL-68人正常肝细胞内超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px)的活力,起到抗氧化应激保护的作用,为薏苡仁多糖的应用提供理论依据。展开更多
By using p-type polymer poly(2,5-Didodecyloxy-1,4-Phenylenylenevinylene)(PDDOPV)and n-type inorganic material ZnO:Zn,the electronluminescent(EL)emission from bilayer device based on polymer/inorganic hetero-junction w...By using p-type polymer poly(2,5-Didodecyloxy-1,4-Phenylenylenevinylene)(PDDOPV)and n-type inorganic material ZnO:Zn,the electronluminescent(EL)emission from bilayer device based on polymer/inorganic hetero-junction was successfully demonstrated.In comparison with single layer polymer device,with dc voltage of 10V,the brightness and luminous efficiency of bilayer device were enhanced 14 and 26 times,respectively.The EL spectrum of bilayer device is not identical to the characteristic emission spectrum of either PDDOPV or ZnO:Zn,and shifts continuously towards to short wavelength direction as the applied voltage increases.展开更多
文摘以脱脂薏苡仁为原料,采用水提醇沉法制备薏苡仁多糖,通过DEAE Sepharose Fast Flow离子交换柱层析,得到薏苡仁多糖CSP1和CSP2 2种组分,结合扫描电镜和红外光谱对其结构进行分析,并通过对氧化应激细胞的保护作用研究其抗氧化活性。结果表明:纯化后的薏苡仁多糖CSP1和CSP2总糖含量分别为90.83%和88.66%,蛋白质含量分别为1.403%和0.086%。体外抗氧化试验显示薏苡仁多糖CSP1和CSP2能提高H_(2)O_(2)诱导的WRL-68人正常肝细胞内超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px)的活力,起到抗氧化应激保护的作用,为薏苡仁多糖的应用提供理论依据。
基金Supported by the National Natural Science Foundation of China under Grant No.69606002the Key Project Foundation of High Education Bureau of Tianjin。
文摘By using p-type polymer poly(2,5-Didodecyloxy-1,4-Phenylenylenevinylene)(PDDOPV)and n-type inorganic material ZnO:Zn,the electronluminescent(EL)emission from bilayer device based on polymer/inorganic hetero-junction was successfully demonstrated.In comparison with single layer polymer device,with dc voltage of 10V,the brightness and luminous efficiency of bilayer device were enhanced 14 and 26 times,respectively.The EL spectrum of bilayer device is not identical to the characteristic emission spectrum of either PDDOPV or ZnO:Zn,and shifts continuously towards to short wavelength direction as the applied voltage increases.
