三聚氰胺甲醛树脂对金的吸附行为

研究了在不同酸性介质（硝酸、硫酸、盐酸）中，三聚氰胺甲醛树脂（蜜胺树脂）对金的吸附行为及其影响因素，结果表明，在酸性介质中，该树脂对金有较高的吸附率（达８０％以上）和好的选择性，并对其吸附机理进行了初步的探讨。     

氮硫方酸与卤代烃的反应

氮硫方酸的巯基和氨基有较高的反应活性，利用巯基酸性较强易于成盐的特点，实现了氮硫方酸与卤代烃的选择性Ｓ－烃基化反应，成功地制得了１１个相应的衍生物。     

用萃取第三相形成法治理β－萘磺酸废水Ⅰ．β－萘磺酸－水－三辛胺（苯）体系的萃取机理

研究了文题体系的萃取机理。结果表明，初浓度为１．１３０×１０￣（－２）ｍｏｌ／Ｌ的β－萘磺酸与初浓度范围为（１．４５１～４．１３５）×１０￣（－２）ｍｏｌ／Ｌ的三辛胺在达到萃取平衡后，以１：１摩尔比缔合成胺盐萃合物；反应平衡常数Ｋ＝５．００ｋＬ／ｍｏｌ；反应焓变。对β－萘磺酸之类的有机芳族磺酸来说，三辛胺是一种高效萃取剂。     

黄烷酮电解氧化合成黄酮

黄烷酮电解氧化合成黄酮鲁宽科，谭镇，李裕林（兰州大学化学系，兰州７３００００）狼毒素是从瑞香狼毒（ｓｔｅｌｌｅｒａｃｈａｒｍａｅｊａｓｍｅ，Ｌ）中分离出的一种Ｃ３─Ｃ３Ｎ偶联的双黄烷酮［１］，其结构正好是两个柚皮素在Ｃ─３位相连。我们曾以黄酮为原料，...     

S－三嗪衍生物的合成（Ⅱ）

由三聚氯氰出发，经胺化、巯基化，合成了以Ｓ－三嗪为母体的８种衍生物。通过红外光谱、元素分析进行了结构鉴定。     

具生物功能的二氧四胺大环配合物的研究──Ⅲ．十三元二氧四胺大环铜（Ⅱ）配合物的K_2S_2O_8氧化反应

用紫外可见光谱跟踪Ｋ２Ｓ２Ｏ８对［Ｃｕ（Ｈ_２ｄｔ）］及［Ｃｕ（Ｈ_２ｎｐｄｔ）］的氧化过程，研究［ＣｕⅢＨ_２Ｌ］＋配合物的生成、分解反应动力学，获得了拟一级反应的速率常数和表现活化能。配合物［Ｃｕ（Ｈ_２ｄｔ）］的氧化速度比带有取代基［Ｃｕ（Ｈ_２ｎｐｄｔ）］的更快。     

聚丙烯酰胺凝胶电泳体系中蛋白质的荧光标记分析

在室温下,采用聚丙烯酰胺凝胶电泳法,分离经荧光胺或对氯荧光胺荧光标记的蛋白质样品,可在2.5小时内完成蛋白质样品的分离和其区带的鉴定。耗时是传统方法的四分之一,而且荧光图象清晰、灵敏度较高。     

N-氯乙酰基-5-芳氧甲基-2-噁唑烷酮类化合物的合成

目的研究N-氯乙酰基-5-芳氧甲基-2-噁唑烷酮类化合物的合成方法。方法以三乙胺为催化剂，甲苯为溶剂，在110℃反应3h制备目标产物，并对产物进行了薄层色谱、元素分析、红外、核磁的分析鉴定和表征。结果合成了7种化合物，产率大于80％。结论反应条件温和，方法简单，具有较好的应用价值。     

Inhibition of Alkaline Phosphatase from Pearl Oyster Pinctada fucata by o-Phthalaldehyde： Involvement of Lysine and Histidine Residues at the Active Site

Alkaline phosphatase from Pinctada fucata was inactivated by o-phthalaldehyde （OPA）. The inactivation followed pseudo first-order kinetics with a second rate constant of 0.167 （mmol/L）^-1·min^-1 at pH 7.5 and 25℃. A Tsou＇s plot analysis showed that inactivation occurred upon formation of one isoindole group. The OPA-modified enzyme lost the ability to bind with the specific affinity column and the presence of substrates or competitive inhibitors protected the enzyme from inactivation. The results revealed that the OPA-reaction site was at the enzyme substrate binding site. Prior modification of the enzyme by lysine or histidine specific reagent abolished formation of the isoindole derivatives, suggesting that lysine and histidine residues were involved in the OPA-induced inactivation. Taken together, OPA inactivated the alkaline phosphatase from Pinctada fucata by cross-linking lysine and histidine residues at the active site and formed an isoindole group at the substrate binding site of the enzyme.     

Functional identification of gene cluster for the aniline metabolic pathway mediated by transposable element

A convenient and widely applicable method has been developed to clone aniline metabolic gene cluster in this study. Three positive recombinant plasmids pDA1, pDB2 and pDB11 were cloned from genomic library of aniline degradation strain AD9. The result of aniline dioxygenase （AD） activity and catechol 2,3-oxygenase （C230） activity assay showed that pDA1 and pDB11 contain aniline dioxygenase genes and catechol 2,3-dioxygenase genes, respectively. The sequence analysis of the total 24.7-kb region revealed that this region contains 25 ORFs, of which 17 genes involve metabolism of aniline. In the gene cluster, the first five genes （tadQTA1A2B） and the subsequent gene （tadR1） were predicted to encode a multi-component aniline dioxygenase and a LysR-type regulator, respectively, while the others （tadD1C1D2C2EFGIJKL） were expected to encode metacleavage pathway enzymes for catechol degradation. The gene cluster was surrounded by two IS1071 sequences.