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纳米核药的研究进展 被引量:5
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作者 张华明 罗顺忠 魏洪源 《同位素》 CAS 2018年第5期326-334,共9页
本文对近十年纳米核药的研究进展进行综述,展望其发展方向。纳米载体材料以生物材料如脂质体或生物友好材料如磷酸盐、羟基磷灰石等为主。根据诊断和治疗目的选择核素,如^(131)I、^(111)In、^(125)I、^(166)Ho、^(177)Lu、^(90)Y、^(225... 本文对近十年纳米核药的研究进展进行综述,展望其发展方向。纳米载体材料以生物材料如脂质体或生物友好材料如磷酸盐、羟基磷灰石等为主。根据诊断和治疗目的选择核素,如^(131)I、^(111)In、^(125)I、^(166)Ho、^(177)Lu、^(90)Y、^(225)Ac等。制备方法包括纳米粒子后辐照活化法、包覆法和吸附法等。大量预临床试验结果表明,纳米核药对肿瘤诊治具有较好的特异性,是肿瘤诊治和个性化医疗研究的重要方向。 展开更多
关键词 放射性核素 标记 纳米技术 纳米载体材料 纳米药物
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Effects of helium on titanium films and the helium diffusion
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作者 SONG YingMin luo shunzhong +6 位作者 LONG XingGui AN Zhu LIU Ning PANG HongChao WU XingChun YANG BenFu ZHENG SiXiao 《Chinese Science Bulletin》 SCIE EI CAS 2008年第3期469-472,共4页
Using direct current-magnetron sputtering,Helium-trapped Ti films with a He/Ar mixture was studied.The relative helium content,helium depth profiles for the Ti films and crystallization capacity were analyzed by Enhan... Using direct current-magnetron sputtering,Helium-trapped Ti films with a He/Ar mixture was studied.The relative helium content,helium depth profiles for the Ti films and crystallization capacity were analyzed by Enhanced Proton Backscattering Spectrometry(EPBS)and X-ray diffraction(XRD).It was found that helium diffusion enhanced as more helium trapping into Ti films,and the He holding ratios were 95.9%,94.9%,93.9%,82.8% when the Ti films with the He/Ti of concentrations of 9.7 at.%,19.5 at.%,19.7 at.%,48.3 at.% were measured again 4 months later,respectively.The diffraction peaks be-came weak and wider,the peak of(002)plane was shifted to smaller diffraction angles and the relevant interplanar spacing d(hkl)increased gradually as more helium trapping into Ti films.The main peak was made trending to the(101)plane by both higher deposition temperature and more helium trapping. 展开更多
关键词 磁电管反应溅射法 钛膜 扩散
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Crescent aromatic oligothioamides as highly selective receptors for copper(Ⅱ) ion
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作者 HE LuTao JIANG Qian +6 位作者 GAO RongZhao YANG XinShi FENG Wen luo shunzhong YANG YanQiu YANG Liang YUAN LiHua 《Science China Chemistry》 SCIE EI CAS 2014年第9期1246-1256,共11页
A series of crescent aromatic oligothioamides(4, 6, 8, 15, and 18) bearing different number of sulfur atoms were designed and synthesized via thionation of their corresponding aromatic oligoamides(3, 5, and 7) using L... A series of crescent aromatic oligothioamides(4, 6, 8, 15, and 18) bearing different number of sulfur atoms were designed and synthesized via thionation of their corresponding aromatic oligoamides(3, 5, and 7) using Lawesson's reagent. The X-ray structure of a trimeric analogue(13) revealed the presence of intramolecular three-center hydrogen bonds that are responsible for the rigidification of the molecular backbone. The extraction by these novel receptors toward some representative heavy metal cations(Zn2+, Cd2+, Co2+, Ni2+, Pb2+, and Cu2+) and alkali and alkaline earth metal cations(Li+, Na+, K+, Rb+, Cs+, Ca2+, and Sr2+) demonstrated high efficiency(83.5%–96.4%) and superior selectivity for Cu2+ over other selected metal cations. Particularly, the extractability was correlated to both the number of sulfur atoms and orientation of thiocarbonyl groups as revealed in the order: 6 > 4 > 18 > 15. This is in stark contrast to the oligoamides that only gave much lower extractability(5.9%–16.4%), suggestive of the importance of replacement of carbonyl oxygen atoms with sulfur atoms in the extraction of Cu2+. The complexation behavior of 4, 6, and 8 with Cu2+ was also examined by UV-Vis and NMR techniques. 展开更多
关键词 aromatic oligothioamide hydrogen bonding copper selective extraction cation receptor
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