一种逆付－克反应及苯并［h］香豆素的合成

对位取代的肉桂酸和ａ－萘酚在多聚磷酸作用下生成苯并［ｈ］香豆素，其反应机理被认为是通过一个逆付－克反应。     

含溴芳基磷酸三聚氰胺盐的合成及应用

以三氯氧磷、2，4，6－三溴苯酚及三聚氰胺等为原料合成了含磷－溴－氮阻燃剂0－（2，4，6－三溴苯基）磷酸三聚氰胺盐（Ⅲ） 和O，O－二（2，4，6－三溴苯基）磷酸三聚氰胺盐（Ⅳ），元素分析、红外光谱、^1HNMR等确定了结构。在不饱和聚酯树脂中应用试验证明磷－溴－氮在同一分子中具有协同阻燃作用，相同添加量时阻燃剂（Ⅲ）、（Ⅳ）的阻燃性能优于含磷－溴阻燃剂（Ⅴ）。应用试验表明，阻燃剂（Ⅲ）、（Ⅳ）、（Ⅴ）基本不影响不饱和聚酯树脂的物理机械性能。     

磷酸—氢钛二水合物的合成和性能表征

该文合成了一种具有层状结构的磷酸－氢钛二水合物，并对该化合物的性能进行了多种表征。实验证明：它是一具有独特性能的无机离子交换体，对氨的吸附性能与人格昂贵的磷酸－氢锆－水全物相当，能快速高效地吸附水溶液中的氨和敢态氨。     

稀脉浮萍中环腺苷-磷酸(cAMP)含量变化与开花及衰老的关系

自从cAMP最初在动物中被分离、鉴定和确定其生理作用以来,对生物体内环核苷酸的研究日益引起人们的重视;并从分子水平上阐明了cAMP作为动物激素的第二信使在细胞内引起一系列生理变化的作用机理。高等植物中环核苷酸的含量比动物组织低得多。过去由于受到测定方法的限制,曾在较长时期对其在植物中是否存在有所争论;且多用外加     

Fermentation of xylose to produce ethanol by recombinant <Emphasis Type="Italic">Saccharomyces cerevisiae</Emphasis> strain containing <Emphasis Type="Italic">XYLA</Emphasis> and <Emphasis Type="Italic">XKS1</Emphasis>

Fermentation of the pentose sugar xylose to produce ethanol using lignocellulosic biomass would make bioethanol production economically more competitive. Saccharomyce cerevisise, an efficient ethanol producer, cannot utilize xylose because it lacks the ability to convert xylose to its isomer xylulose. In this study, XYLA gene encoding xylose isomerase (XI) from Thermoanaerobacter tengcongensis MB4T and XKS1 gene encoding xylulokinase (XK) from Pichia stipitis were cloned and functionally coexpressed in Saccharomyces cerevisiae EF-326 to construct a recombinant xylose-utilizing strain. The resulting strain S. cerevisiae EF 1014 not only grew on xylose as sole carbon source, but also produced ethanol under anaerobic conditions. Fermentations performed with different xylose concentrations at different temperatures demonstrated that the highest ethanol productivity was 0.11 g/g xylose when xylose concentration was provided at 50 g/L. Under this condition, 28.4% of xylose was consumed and 1.54 g/L xylitol was formed. An increasing fermentation temperature from 30℃ to 37℃ did not improve ethanol yield.     

Expression of Aspergillus niger 9891 Endoinulinase in Pichia pastoris

An endoinulinase gene from Aspergillus niger 9891 (CGMCC0991) has been expressed in Pichia pastoris GS115 using pPIC9 vector. The recombinant endoinulinase was highly expressed and the optimization of the expression in a 7 liter of fermentor has been investigated. In fermented broth, the concentration of protein secreted is 2.15 mg/ml. The activity of endoinulinase is 1501 U/ml with sucrose as substrate and 291 U/ml with inulin as substrate, 105 and 273 times higher than that from the original strain respectively.     

醇体系中硅支撑的层柱状磷酸锑(Ⅴ)的合成与表征

在有机体系中,以溶剂热法合成出五价层柱状磷酸锑化合物,并研究了合成条件对产物的影响;采用X-ray衍射和红外光谱法分析了该化合物粉末并对其化合物的结构组成进行了鉴定.为定向合成其它层柱状化合物提供了可参考的依据.