芯片式流通池顺序注射可更新表面反射光谱法用于酶反应检测

将芯片式流通池顺序注射可更新表面反射光谱法用于酶反应检测。HRP催化H2O2氧化BPR底物的反应用于对H2O2的检测。此反应体系与葡萄糖氧化酶联用，用于对血清中葡萄糖的检测。     

VINYL MONOMERS BEARING CHROMOPHORE MOIETIES AND THEIR POLYMERS——Ⅹ.INITIATION AND PHOTOCHEMICAL PROPERTIES OF p-(N,N-DIMETHYLAMINO)STYRENE AND ITS POLYMERS*

A vinyl monomer having an electron-donating moiety, p-(N,N-dimethylamino)styrenc (DMAS),was synthesized. It was combined with benzoyl peroxide (BPO) to form a redox initiation system to initiatethe polymerization of methyl methacrylate (MMA). UV spectra measurements show that DMAS enters thePMMA chain as well. Both DMAS and its polymer P(DMAS) display strong fluorescence, and thefluorescence can be quenched by electron-deficient compounds such as methacrylonitrile, fumaronitrile andmethyl methacrylate etc. Moreover, DMAS can also form charge transfer complex (CTC) with strongelectron acceptors such as tetracyanoethylene (TCNE). The difference between the photochemical propertiesof DMAS and P(DMAS) were explained in terms of molecular structure change and polymer conformationeffect in solution. In addition, the CTC and exciplex formation of DMAS or P(DMAS) with C_(60) were alsostudied.     

苏云金芽孢杆菌杀虫基因导入中国栽培水稻品种中花11号获得转基因植株

在水稻的遗传转化中,迄今尚未见到将优良性状基因导入生产推广品种并获得转基因植株的报道。我们首次将B.t.杀虫基因导入到生产推广品种中花11号中,并建立了一套转导外源DNA的有效方法。应用剪掉内颖,同时去掉柱头保留完整外颖的方法可使种子结实率提高到50％。遗传转化植株经分子杂交实验室证实,B.t.杀虫基因已整合到水稻基因组中,得到了转杀虫基因水稻工程植株。用Jefferson的组织化学法测定转基因植株的β-glucuronidase的活性,与B.t.杀虫基因形成翻译融合的GUS基因得到了表达,这为B.t.杀虫基因在转基因水稻植株中的表达提供了证据。     

气相色谱手性衍生化试剂N－七氟丁酰基－L－脯氨酰氯的合成与应用

 合成了用于气相色谱（ＧＣ）的手性衍生化试剂Ｎ－七氟丁酰基－Ｌ－脯氨酰氯（Ｎ－ＨＦＢ－Ｌ－ＰＣｌ）。各种特性试验表明，Ｎ－ＨＦＢ－Ｌ－ＰＣｌ是灵敏的ＧＣ手性衍生化试剂，可直接于水相拆分微量的手性胺对映体。     

用气相色谱、气相色谱－质谱对萘普生重要中间体6－甲氧基－2－乙酰萘合成反应的研究

 在优良抗风湿药物萘普生的重要中间体６－甲氧基－２－乙酰素的合成中存在溶剂硝基苯的毒性及所带来的污染。而改用二氯乙烷作溶剂，只加少量硝基苯即可。为配合合成工艺的优化，用气相色谱（ＧＣ）、气相色谱－质谱（ＧＣ／ＭＳ）对反应产物、副产物及多个杂质进行了定性分析研究，并在５％ＯＶ－１０１ＣｈｒｏｍｏｓｏｒｂＷＡＷＤＭＣＳ柱上完成了产物的内标定量分析。从而减少了副反应和高沸点杂质的生成，最终生产出了９５％以上含量的６－甲氧基－２－乙酰萘产品，收率达到６０％。     

Synthesis and Characterization of the Chiral Skeleton Cluster [NiRuMo(CO)_5(μ_3-S)(η~5-C_5H_5)(η~5-C_5H_4COCH_3)]

1 INTRODUCTION The chemistry of transition metal cluster has enjoyed an exceptional growth since the mid 1970s[1, 2], especially in recent years the structural and bonding aspects of mixed-metal tetrahedral skeleton clusters have been extensively studied[3]. One important reason is that such chiral cluster can induce an asymmetric catalysis potentially. In our research group, considerable efforts have been directed to the synthesis of chiral tetrahedral clusters containing four different…     

THERMAL PROPERTY, MISCIBILITY AND CRYSTALLIZATION BEHAVIOR OF POLY（3-HYDROXYBUTYRATE-co- 3-YDROXYHEXANOATE） AND POLY（BUTYLENE SUCCINATE-ADIPATE） （PHBHHX/PBSA） BLENDS

Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/20 to 20/80 by melt mixing method. Differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMA), polarizing optical microscopy (POM) and wide angle X-ray diffractometer (WAXD) were used to study the miscibility and crystallization behavior of PHBHHx/PBSA blends. Experimental results indicate that PHBHHx is immiscible with PBSA as shown by the almost unchanged glass transition temperature and the biphasic melt.     

以混合价镍氢氧化物为镍源固气合成LiNi0.7Co0.25Al0.05O2

层状LiCoO2作为锂离子二次电池电极正极材料已得到广泛应用。由于钴资源匮乏及成本高,致使进一步提高比容量和比能量以及降低成本的研究引起关注。诸如LiCoO2体材中钴被M(N i,Mn,Ti,Mg)替代或部分被替代的研究[1-3],表面修饰研究[4-6],合成方法研究如固相法[7],溶胶凝胶法[8],共沉淀法[9],微波加热合成法[10]等。与钴相比,镍资源相对丰富且对环境友好,故以镍代钴合成LiCo1-xN ixO2的研究成为热点[11-13]。由于N i2 难以被氧化成N i3 致使合成时易生成非化学计量化合物,加之在充放电过程中,由于Li 离子与N i3 离子半径相近易产生阳离…     

Fast electron transfer repair of oxidizing OH adduct of dGMP by chlorogenic acid

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可控制自由基聚合DPE法制备P(AA-MMA-ST)/Fe3O4磁性复合微球

在制备超细Fe₃O₄磁性粒子的基础上, 利用可控制自由基聚合DPE法制备出平均粒径为265 nm的P(AA-MMA-ST)/Fe₃O₄磁性复合微球. 采用XRD, TGA, FTIR等手段对所制备的磁性复合微球的形态、结构及磁响应性等进行了表征, 结果表明用DPE法制备出的磁性复合微球磁含量较高, 粒径比较均匀.