~(188)Re标记卟啉TPPS_4及其鼠体内分布行为

基于卟啉类仿生分子有亲多种肿瘤性和辐射增敏性,本文作者以亚锡还原法研究了无载体188Re标记中位-四(4-磺酸苯基)卟啉(TPPS4)制备条件对188Re-TPPS4合成的影响,以荷肝癌及黑色素瘤裸鼠为模型探索了188Re-TPPS4在健康鼠及裸瘤鼠体内靶向行为。结果表明,以Sn(II)-Tart为还原剂,在pH为1~5,沸水浴氮气氛中反应30m in,可获得产率大于95%的188Re-TPPS4,其放射性比活度可达11.2 GBq(mol.TPPS4)-1;Vc可增强产物在靶器官肝的摄取以及提高188Re-TPPS4的体内稳定性,有助于防止其标记物氧化分解为ReO4-,188Re-TPPS4在瘤裸鼠体内行为实验表明肝癌或黑色素瘤对其有较高摄取,注射后8h时瘤摄取(%ID.g-1)分别为5.7和4.4,且非瘤靶组织摄取相对较低,这提示188Re-卟啉配合物可望作为潜在肿瘤治疗剂。     

1-[N(2′-脱氧胞基)]-2-[N-(2′-脱氧鸟基)]乙烷的合成及其在DNA股间交联检测中的应用

以2′-脱氧鸟苷,2′-脱氧胞苷,2-氟乙醇等为原料合成了1-[N-(2′-脱氧胞基)]-2-[N-(2′-脱氧鸟基)]乙烷(dG-dC),其结构经1HNMR,IR和MS表征。以dG-dC为标准品,用HPLC-MS对1,3-双(2-氯乙基)-1-亚硝基脲导致DNA股间交联的损伤产物进行了定性分析。     

Nanometer-sized Silicon Particles Prepared by Laser Vaporization and Their Photoluminescence

Nanometer-sized silicon particles were prepared by laser vaporization of a silicon target in pure argon ambient at a reduced pressure. The shape and size of the nanoparticles were characterized by transmission electron microscopy. The as prepared nanometer silicon particles exhibit visible luminescence under light excitation and the activated light emissions are found to show a strong dependence on temperature.     

甲醇-正己烷和甲醇-环己烷溶液构型的分子模拟

用Ｍｏｎｔｅ Ｃａｒｌｏ分子模拟方法研究了不同温度条件下甲醇－正已烷、甲醇－环已烷溶液体系微观结构的变化情况。模拟表明，无论是甲醇－正已烷体系，还是甲醇－环已体系，在其溶液的近临界区，甲醇周围溶剂介质的密度最小，而甲醇分子之间的积聚最为明显。通过对氢健分析的结果表明，在溶液临界区，氢键作用与非氢键作用的距离不可区分。     

三阶矩阵的平方根

给出3×3矩阵的平方根公式，并通过实例阐明我们的方法，完善了有关文献中的某些结果．     

毛细管电泳法分离测定潮汕凉果中的山梨酸、苯甲酸、糖精钠

采用毛细管电泳-PDA检测法,考察了pH、缓冲介质、波长、电压对山梨酸、苯甲酸、糖精钠分离测定的影响,得到优化的实验条件.以20mmol/乙磷酸盐(pH=7.4)为运行缓冲液,12kV为分离电压,检测通道波长为:192、202、254nm的电泳条件下,进样时间5s,山梨酸、苯甲酸、糖精钠可在15min内实现分离.山梨酸在0.250-100mg/L,苯甲酸在0.100-50.0mg/L,糖精钠在0.100-50.0mg/L范围内呈良好的线性关系,迁移时间、峰面积相对标准偏差均小于1.41%(n=5).用上述方法对实际样品进行测定,回收率在90.9%以上.     

Suppercontinuum Generation in InP Nano Inner Cladding Fibers

The InP nano inner cladding fiber is fabricated by the method of modified chemical vapor deposition. The thickness of the InP nano thin film is about 16 nm. A 20 dB supercontinuum over 100nm in the telecommunication band is generated by infecting 1550nm, 120fs, 50MHz repetition rate optical pulse into this kind of fiber. Moreover, the results indicate that the width of the supercontinuum spectra can be influenced by the fiber length and pump power. The longer fiber at higher pump power can produce broader supercontinuum spectrum.     

溶胶-凝胶法制备氟化物薄膜光波导

以乙酰丙酮盐为原料,用溶胶——凝胶法（Ｓｏｌ－Ｇｅｌ）制备掺铒的锆钡镧铝（ＺＢＬＡ）氟化物薄膜光波导．第一步为制备包含锆钡镧铝及铒的溶胶;第二步为在基底上用旋转镀膜的方法镀膜及氟化．用这种方法得到的薄膜用扫描电镜测量了其组分和表面膜的形态．同时也测得膜的厚度和折射率．     

PLS-原子吸收光谱法同时测定稀土氧化物中的Eu和Cu

用偏最小二乘法（ＰＬＳ）校正了火焰原子吸收分析中Ｅｕ３２４．７５３ｎｍ对Ｃｕ３２４．７５４ｎｍ吸收线重叠干扰,用铜空心阴极灯同时测定了合成样及稀土氧化物中的Ｅｕ和Ｃｕ。     

in-situ ESR AND RAMAN SPECTROSCOPIC STUDIES ON ELECTROPOLYMERIZATION OF PYRROLE

The in-situ transient ESR measurements reveal that the oxidized structure (PP++) of polypyrrole (PP) films has an electrocatalytic activity to the oxidation of pyrrole during the electropolymerization process. Surface-enhanced resonance Raman scattering (SERRS) effect was used to probe the structure of PP films in very early stages of the polymerization on gold electrodes. It is of special interest that the electropolymerization can take place at much less positive potentials (about 300 mV) under the irradiation of light. This photocatalytic effect may be applied to the pattern deposition of polymers.