给小鼠喂食壳聚糖(chitosan,CS)、羧甲基壳聚糖(carboxymethyl chitosan,CMCS)、壳聚糖季铵盐(quaternary ammonium salt of chitosan,HACC)和羟丙基壳聚糖(hydroxypropyl chitosan,HPCS)30 d后,测定其免疫器官指数、碳粒廓清速率、迟...给小鼠喂食壳聚糖(chitosan,CS)、羧甲基壳聚糖(carboxymethyl chitosan,CMCS)、壳聚糖季铵盐(quaternary ammonium salt of chitosan,HACC)和羟丙基壳聚糖(hydroxypropyl chitosan,HPCS)30 d后,测定其免疫器官指数、碳粒廓清速率、迟发型变态反应、血清溶血素含量(半数溶血值HC_(50))。结果表明:摄食CS及其水溶性衍生物的小鼠以上指标均高于对照组;除胸腺指数和双耳质量差值外,HACC组小鼠其他各项免疫指标与对照组相比均呈显著或极显著差异(P<0.05或P<0.01);同样,除胸腺指数外,HPCS组小鼠其他各项免疫指标均显著或极显著高于对照组(P<0.05或P<0.01);CMCS组小鼠的吞噬指数(K)和半数溶血值(HC_(50))与对照组相比均呈显著差异(P<0.05);壳聚糖及其3种水溶性衍生物都能够增强小鼠免疫功能,增强效果排序为HPCS>HACC>CMCS>CS,这可能与引入的化学基团不同有关。展开更多
Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COO...Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COOH) 9, respectively. They are particularly interesting in medical application.展开更多
The luminescent behavior on formation 1∶1 complex of 25,26,27,28 tetra carboxylic acid 5,11,17,23 calixarenesulfonate(L 2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed tha...The luminescent behavior on formation 1∶1 complex of 25,26,27,28 tetra carboxylic acid 5,11,17,23 calixarenesulfonate(L 2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed that the pH value of the solution had obviousan influence on the fluorescence intensity of L 2·Tb 3+ complex, but the fluorescence intensity was hardly changed over the pH range from 6 to 11. The complex exhibits a higher emission quantum yield( φ =0.31) in aqueous solution, which indicates energy transfer type emission. The complexation behavior of L 2 with trivalent lanthanoid ions(Tb 3+ and Eu 3+ ) was also studied in aqueous boracic acid(hydrochloric acid buffer solution(pH 8.0) at 25 ℃ by UV Vis and fluorescence measurements. The spectrophotometric titrations have been performed to give the complex stability constants( K S) for the stoichiometric 1∶1 inclusion complexation of L 2 with Tb 3+ and Eu 3+ . The complex stability for L 2·Eu 3+ was higher than that for L 2·Tb 3+ , but no characteristic fluorescence was found.展开更多
文摘给小鼠喂食壳聚糖(chitosan,CS)、羧甲基壳聚糖(carboxymethyl chitosan,CMCS)、壳聚糖季铵盐(quaternary ammonium salt of chitosan,HACC)和羟丙基壳聚糖(hydroxypropyl chitosan,HPCS)30 d后,测定其免疫器官指数、碳粒廓清速率、迟发型变态反应、血清溶血素含量(半数溶血值HC_(50))。结果表明:摄食CS及其水溶性衍生物的小鼠以上指标均高于对照组;除胸腺指数和双耳质量差值外,HACC组小鼠其他各项免疫指标与对照组相比均呈显著或极显著差异(P<0.05或P<0.01);同样,除胸腺指数外,HPCS组小鼠其他各项免疫指标均显著或极显著高于对照组(P<0.05或P<0.01);CMCS组小鼠的吞噬指数(K)和半数溶血值(HC_(50))与对照组相比均呈显著差异(P<0.05);壳聚糖及其3种水溶性衍生物都能够增强小鼠免疫功能,增强效果排序为HPCS>HACC>CMCS>CS,这可能与引入的化学基团不同有关。
文摘Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COOH) 9, respectively. They are particularly interesting in medical application.
文摘The luminescent behavior on formation 1∶1 complex of 25,26,27,28 tetra carboxylic acid 5,11,17,23 calixarenesulfonate(L 2) and terbium(Ⅲ) ion was investigated by means of fluorescence spectra. The results showed that the pH value of the solution had obviousan influence on the fluorescence intensity of L 2·Tb 3+ complex, but the fluorescence intensity was hardly changed over the pH range from 6 to 11. The complex exhibits a higher emission quantum yield( φ =0.31) in aqueous solution, which indicates energy transfer type emission. The complexation behavior of L 2 with trivalent lanthanoid ions(Tb 3+ and Eu 3+ ) was also studied in aqueous boracic acid(hydrochloric acid buffer solution(pH 8.0) at 25 ℃ by UV Vis and fluorescence measurements. The spectrophotometric titrations have been performed to give the complex stability constants( K S) for the stoichiometric 1∶1 inclusion complexation of L 2 with Tb 3+ and Eu 3+ . The complex stability for L 2·Eu 3+ was higher than that for L 2·Tb 3+ , but no characteristic fluorescence was found.
