分光光度法测定四种壮腰健肾丸中铝的含量

用分光光度法测定了四种不同厂家生产的壮腰健肾丸铝的含量。结果表明,四种中成药中铝含量有显著差异（Ｐ〈０．０１）。这为临床合理用药提供了有用的数据。     

杂质靶丸注入在ITER诊断中应用的可行性

国际热核实验堆ITER-FEAT设计已完成。在ITER中,α粒子诊断是运行控制方面的一个关键性问题。从Kuteev的氢类靶丸消融理论出发,导出了杂质靶丸的半径烧蚀速率和粒子消融速率。并对杂质靶丸注入在未来ITER中作为α粒子诊断的可行性进行了探讨。计算和理论分析表明锂靶丸具有较多兼容性,既可用作α粒子诊断也可测量等离子体的q分布。     

基于改性二氧化硅纳米粒的薄膜微萃取法在固本延龄丸质量分析中的应用

合成新颖的、具有可控结构和性能的改性二氧化硅纳米粒、聚苯胺和聚吡咯作为功能材料,采用铺展法制备4种薄膜微萃取膜并结合高效液相色谱法建立固本延龄丸HPLC特征图谱。使用傅里叶变换红外光谱仪和扫描电子显微镜对薄膜的化学结构和表面微观形态进行表征。对影响萃取效率的主要因素如萃取时间、离子强度和解吸时间等进行了优化。在最优的萃取条件下,测定20批固本延龄丸样品,共确定固本延龄丸HPLC特征图谱10个共有峰,经对照品比对,4、5、6、8号色谱峰分别为松果菊苷、毛蕊花糖苷、甘草苷和丹酚酸B。结果表明该薄膜微萃取法简便、可靠、绿色安全,适用于固本延龄丸的质量分析。     

国家点火装置(NIF)点火靶制备技术研究进展

文章介绍了国家点火装置(NIF)点火靶制备技术在近年来取得的一些最新进展,主要内容包括芯轴与靶丸的制备,氘氚(DT)冰层的均匀化等方面.     

Efficient three-step entanglement concentration for an arbitrary four-photon cluster state

We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster state.As a pioneering three-step entanglement concentration scheme,our protocol only needs a single-photon resource to assist the concentration in each step,which makes this protocol more economical.With the help of the linear optical elements and weak cross-Kerr nonlinearity,one can obtain a maximally-entangled cluster state via local operations and classical communication.Moreover,the protocol can be iterated to obtain a higher success probability and is feasible under current experimental conditions.     

连续电提取浓缩技术

电去离子技术结合了电渗析和离子交换使离子在树脂中瞬时积累、降低体系电阻、电极上水解产生氢离子与氢氧根离子使树脂在线再生,以去除离子为目的制备纯水和高纯水. 这些被去除的离子在浓室中富集,可发展一种新型浓缩分离提取技术,现已逐渐应用于微量重金属、稀有金属、营养盐、有机酸碱,甚至气体的回收. 本文论述了这一连续电提取浓缩技术的原理及应用并探讨发展趋势,以期引起电化学研究工作者的关注.     

Facile Synthesis of Al-pillared Mesoporous Montmorillonite Assisted with Concentrated Al13 Solution

Al-pillared mesoporous montmorillonite was facilely synthesized from concentrated Al13 solution obtained by vacuum concentrating-ultrasonic pillaring strategy.Concentrated Al13 solution could reduce the process of pillare and increase pillaring efficiency.The absolute value of layer distance could be increased by 0.96 nm via concentrated Al13 solution pillare.27Al NMR indicates that Al Keggin ions of concentrated Al13 are arranged in a more regular way by vacuum concentrating method.The Al-pillared mesoporous montmorillonite from concentrated Al13 solution has bigger specific surface area and even pore size distribution which were characterized by X-ray diffraction（XRD） and nitrogen adsorption measurement.Furthermore the catalytic activity of Ai-pillared montmorillonite loaded Ni and Mo catalysts was tested by the hydrodesulfurization of thiophene.The thiophene conversion reached 77.5％,which was higher than the corresponding value reported in the literature.     

超高效液相色谱-串联质谱同时测定加味左金丸中的9种有效成分

建立了同时测定加味左金丸中9种药效成分含量的超高效液相色谱-串联质谱(UPLC-MS/MS)分析方法。采用Zorbax RRHD Eclipse Plus C18色谱柱,以含0.2%甲酸的水-甲醇为流动相进行梯度洗脱,流速0.4 mL/min,在电喷雾电离(ESI)正离子模式下,采用多重反应监测模式进行检测。结果表明,芍药苷、延胡索乙素、药根碱、小檗碱、巴马汀、吴茱萸碱、柴胡皂苷C、柴胡皂苷A、柴胡皂苷D的线性范围分别为0.025～5.0 mg/L、0.0010～2.0 mg/L、0.0023～7.2 mg/L、0.0027～28.9 mg/L、0.0023～9.1 mg/L、0.0050～1.0 mg/L、0.050～10 mg/L、0.005～1.0 mg/L、0.0075～1.5 mg/L;检出限分别为5.0、0.20、0.45、0.54、0.45、1.0、10、1.0、1.5 μg/L。9种成分的加样回收率为99.3%～105%,相对标准偏差均不大于2.6%。该法快捷、准确、重复性好,已成功用于实际样品的分析。     

Theoretical study of stereodynamics for the N+H2/D2/T2 reactions

The effects of isotopic variants on stereodynamic properties for the title reactions have been investigated using a quasi-classical trajectory method based on the first excited state NH2（I^2A＇） potential energy surface [Li Y Q and Varandas A J C 2010 J. Phys. Chem. A 114 9644]. The forward–backward symmetry scattering of the differential cross section can be observed, which demonstrates that all these reactions follow the insertion mechanism. Three angle distribution functions P（θr）, P（φr）, and P（θr, φr） with different collision energies and target molecules H2/D2/T2 are calculated. It is shown that the product rotational angular momentum is not only aligned, but also oriented along the direction perpendicular to the scattering plane. The title reaction is mainly governed by the ＂in-plane＂ mechanism through the calculated distribution function P（θr, φr）. The observable influences on the rotational polarization of the product by the isotopic substitution of H/D/T can be demonstrated.     

稳定同位素比质谱法测定苹果和浓缩苹果汁的δ13C值

用从国际原子能机构溯源得到的橄榄油标准物质[Cat No.B 2172-Batch 3130,其δ13CPDB为(-28.51±0.16)‰]作标准,应用稳定同位素比质谱法测定了苹果和苹果汁的δ13 C值,并以此确定国产苹果的δ13 C值的范围和鉴定制成的果汁的质量。苹果样品去皮后切碎,打成糊状,离心后取其上清液,在75℃加热2～3h至呈黏稠状液体,冷却至室温。此时其糖度约为70Brix。浓缩苹果汁样品是黏稠液体,其糖度一般也在70Brix左右。取2μL上述样品置于锡杯中,按方法处理后供质谱分析。标准物质的进样量为2μL。按所测得碳的稳定同位素13C与12C的比值代入所给公式计算δ13 C值。结果表明:方法的精密度较好,其相对标准偏差(n=11)均小于0.021%。根据测定结果发现,我国苹果的δ13C值在-29.1‰～-23.33‰之间。