氧氟沙星荧光光度法测定痕量铁

研究了在HAc-NaAc缓冲溶液中氧氟沙星与Fe(Ⅲ)的络合反应，结果表明：在pH=4．0的缓冲溶液中，氧氟沙星有稳定而较强的荧光；与Fe(Ⅲ)络合后，荧光强度减弱．最大激发及发射波长为324nm和498．6nm，Fe(Ⅲ)的质量浓度在0．56～3．08mg／L范围内，荧光强度与浓度呈良好的线性关系．检出限为0，076mg／L，常见的共存离子不干扰其测定．本方法用于水中痕量铁的测定，得到了满意的结果。     

纳米Ag（Ⅰ，Ⅲ）O粉体化学沉淀法制备条件的正交试验及其光学热分解性能研究

本文首先利用正交试验确定了液相沉淀法合成纳米AgO粉体的最佳制备条件。接着研究了最佳条件下制备的纳米AgO粉体的性能。UV—vis DRS分析结果表明，反射率随着AgO含量的增加而降低，高纯度AgO在400nm-1100nm波长范围内具有较强的吸收能力。TG—DTG分析结果表明，在N2气氛下，AgO热分解为Ag2O。的温度范围为100℃—200℃，Ag2O热分解为Ag的温度范围为400℃-450℃。     

2—乙酰基—乙酰苄胺与铕(III)和铽(III)配合物的合成及荧光性质研究

合成了一个新型β—二酮型配体,2—乙酰基—乙酰苄胺(L),以及它与铕(III)和铽(III)形成的配合物。分别在固态、乙醇、丙酮、氯仿及甲醇溶液中研究了配合物的荧光性质,并讨论了溶剂效应对配合物荧光强度的影响。     

High molecular transport proteins for JH-III in insect hemolymph

Summary Using two independent techniques, ultracentrifugation in a KBr-gradient, and native pore polyacrylamide gel electrophoresis in combination with [³H]-epoxyfarnesyldiazoacetate photoaffinity labeling, we showed that in the hemolymph ofPeriplaneta americana, and probably also inLeptinotarsa decemlineata JH-III binds to the lipophorin, whereas inLocusta migratoria JH-III binds to a different protein.     

Preparation of MCM-41-supported chiral Salen Mn （Ⅲ） catalysts and their catalytic properties in the asymmetric epoxidation of olefins

A secondary amino-modified mesoporous molecular sieve MCM-41 was obtained by reaction of bis(3-(triethoxysilyl)propyl)amine with MCM-41. The chiral Salen-Mn (III) complex was anchored onto the modified MCM-41 by a multi-step grafting method and two heterogenized catalysts with different Mn contents were obtained. The catalysts were characterized by XRD, N2 adsorption, ICP, FT-IR and DR UV-Vis. Their catalysis on asymmetric epoxidation of several olefins was studied with NaClO and m-CPBA as oxidants respectively. It was found that both the activity and enantioselectivity of the cata- lysts decreased after the homogeneous catalyst was heterogenized. The reasons resulting in the de- crease of catalytic performance were discussed.     

三氯偶氮氯膦-铁(Ⅲ)-溴酸钾催化光度法测定微量铁

在硫酸介质中，微量铁（Ⅲ）对2，4，6－三氯偶氮氯膦的褪色反应有明显的催化作用，确定了最佳反应条件，建立了测定微量铁的催化分光光度新方法，铁在0－6μg/L范围内符合比尔定律，检测限为3．3μg/L，用于大米和活性炭样品中的微量铁的测定，结果满意。     

In vitro biosynthesis of juvenile hormone III by the corpora allata ofCalliphora vomitoria and its role in ovarian maturation and sexual receptivity

Summary JH III is the only JH detected by GLC-MS in medium from in vitro incubations of corpora allata of adult females ofCalliphora vomitoria. When corpora allata were removed from females at various times during the reproductive cycle and the JH III produced by the glands in vitro measured by a JH III radioimmunoassay, an increase in the level of synthesis was found to occur before previtellogenesis (0–24 h). A second increase appeared at the onset of vitellogenesis (72–83 h) and continued until the end of vitellogenesis (96 h) and the occurrence of chorionation (120 h). Since sexual receptivity develops with vitellogenesis, the significantly higher levels of JH III biosynthesis in vitro at this time supports a possible role for JH in the acquisitive of receptivity.     

基于准RTK的GBAS机载定位精度性能研究

摘要：地基增强系统(ground-based augmentation systems,GBAS)中机载导航定位精度和精度可靠性关系到飞机和人员的生命财产安全。因此,提出了在GBAS中使用以准载波相位差分技术（Real - time kinematic,RTK）为差分方式减小潜在误差影响的方法。RTK利用了参考站和移动站之间观测误差的空间相关性,通过差分的方式消除了移动站观测数据中的大部分误差,与传统的差分方式相比,RTK具有更大的技术优势。通过实验验证和数据仿真结果表明：该方案的单频准RTK可实现分米级甚至厘米的高精度定位,能够为飞机的进近提供精密和稳定的导航数据,同时为机场实现GBAS CAT II/III类精密进近服务起到积极地促进作用。     

Tb~(3+)-GMFX-AR体系的共振瑞利散射光谱特性及吉米沙星的测定

建立了一种新的检测吉米沙星的方法.在p H 5.5 HAc-Na Ac缓冲溶液中,吉米沙星(GMFX)作为配体与铽(Ⅲ)与形成配位阳离子,配位阳离子进一步与茜素红(AR)的阴离子反应形成1∶2∶1(Tb3+∶GMFX∶AR)三元离子缔合物,此时将出现新的共振瑞利散射(RRS)光谱,此RRS光谱分别在370 nm与590 nm波长形成两个散射峰.研究发现,370 nm时,在0.005~4.00μg·m L-1吉米沙星浓度范围内此体系的散射强度(ΔI)与吉米沙星浓度线性相关,该体系对吉米沙星的检出限(3σ)为14.5 ng·m L-1.该法简单、快速、重现度高,选择性好,在吉米沙星检测中具有应用价值.     

一个单核三价铬配合物的晶体结构、发光性质及热稳定性

我们重新合成了曾经报道过的反式K[Cr(C₂O₄)_2·(H₂O)₂]_2·3H₂O三价铬配合物, 并借助先进的单晶衍射仪和更先进的解析手段得到了该配合物更加精确的结构模型,该配合物属于单斜晶系,P2/n（No. 13）空间群,晶胞相关参数为：a = 7.8827 (4) Å,b = 5.7296(3) Å,c = 13.6447(7) Å,β= 103.506(5)°,Z = 2,Dc =1.980 Mg/m³,V = 599.22(5) ų。热重测试结果显示该配合物在357 K以前是稳定的,在410 nm最有效的紫外光光源的激发下,配合物在610 nm处有一个尖锐的发射峰。