液相色谱法测定地质样品中的芳香化合物

发展了用液相色谱法检测地质样品中芳香化合物的方法。对观察到的色谱峰进行了定性分析，了该法对油气地球化学勘探的意义。     

Chiral Salen Manganese Complex Immobilized on SBA-15： A New Heterogenized Enantioselective Catalyst for the Epoxidation of Alkenes

Jacobsen‘s catalyst was immobilized onto SBA-15 by multi-step grafting, and this heterogenized catalyst exhibited comparable catalytic performance with the corresponding homogeneous counterpart for the epoxidation of alkenes, and the catalyst could be recycled effectively several times.     

大孔吸附树脂负载氢氧化锰作催化剂空气氧化水中硫化物的研究

采用ＮＫＡ２型大孔吸附树脂负载氢氧化锰作催化剂，研究模拟水样中硫化物的空气氧化过程和影响因素，并对煤气和焦化工业含硫废水进行氧化试验．结果表明，在ｐＨ９～１１和不低于３０℃的条件下，浓度６３０～３８００ｍｇ／ｌ的Ｓ２－可在１～３小时内达到９９％的氧化率，树脂负载催化剂可重复使用．     

应用晶体结构数据进行化学反应途径研究 Ⅰ. 五配位钼化合物Mo(L)5的动态立体化学

The principle of structure correlation is applied to 28 crystal structures which contain 44 different five-coordinate molybdenum fragments. The data derived map the reaction pathway for a bimolecular ligand substitution reaction at tetrahedral molybdenum centers. The dihedral-angle method from Muetterties and Guggenberger is employed in order to describe the interconversion between the trigonal bipyramidal (TBP) and the square pyramidal (SQP) conformations via the Berry pseudorotation mechanism in the system of Mo(L)_5 complexes. This structure correlation method provides a convincing mapping of the Berry pathway in this paper.     

大鼠肾组织的超低温快速冷冻固定和冷冻置换研究

超低温快速冷冻固定以极高的冷冻速率（１００００Ｋ／ｓ）对生物组织进行物理固定，可使生物组织结构、组织内可溶性离子及游离性物质得到保存，使被固定后的生物组织保持最接近于原自然状态，这种样品制备方法大大优于化学制备法，因而在Ｘ－射线微分析及免疫细胞化学中得到广泛应用。生物样品超低温快速冷冻后，利用冷冻置换法，在低温下将生物组织内的结晶水缓慢置换出来，而后常规包埋切片，可获得理想的组织结构及组织内待分析成分。本文应用超低温快速冷冻固定技术及冷冻置换法对大鼠肾皮质部的快速冷冻固定及损伤进行探讨。     

Preparation of Nanoelectrode Ensembles by Assembly of Nano—Silver Colloid on Gold Surface

A novel method for preparing silver nanoelectrode ensembles(SNEEs) and gold nanoelectrode ensembles (GNEEs) has been developed. Silver colloid particles were first absorbed to the gold electrode surface to form a monolayer silver colloid. N-hexadecyl nercaptan was then assembled on the electrode to form a thoil monolayer on which hydrophilic ions cannot be transfered. The SNEEs was prepared by removing thiol from silver colloid surface through applying and AC voltage with increasing frequency at 0.20V(vs.SCE). Finally,GNEEs was obtained by immersing a SNEEs into 6 mol/L HNO3 to remove the silver colloid particles. By comparison with other methods such as template method ect., this method enjoys some advantages of lower resistance, same diameter,easy preparation,controllable size and density.     

Effects of sugar inhibition on cellulases and β-glucosidase during enzymatic hydrolysis of softwood substrates

A quantitative approach was taken to determine the inhibition effects of glucose and other sugar monomers during cellulase and β-Glucosidase hydrolysis of two types of cellulosic material: Avicel and acetic acid-pretreated softwood. The increased glucose content in the hydrolysate resulted in a dramatic increase in the degrees of inhibition on both β-Glucosidase and cellulase activities. Supplementation of mannose, xylose, and galactose during cellobiose hydrolysis did not show any inhibitory effects on β-Glucosidase activity. However, these sugars were shown to have significant inhibitory effects on cellulase activity during cellulose hydrolysis. Our study suggests that high-substrate consistency hydrolysis with supplementation of hemicellulose is likely to be a practical solution to minimizing end-product inhibition effects while producing hydrolysate with high glucose concentration.