Fabrication of porous alumina templates with a large-scale tunable interpore distance in a H_2C_2O_4-C_2H_5OH-H_2O solution

Highly ordered porous alumina templates with a large-scale tunable interpore distance (100―445 nm) have been successfully fabricated under an electric field of 40―180 V by modifying oxalic acid solution with adequate alcohol. The results under our experimental conditions show that the phenomena of burning and breakdown during the high-field anodization process can be avoided by adding a proper amount of alcohol to the oxalic acid solution. An excellent linear relationship between interpore distance and anodization voltage is obtained under 40―170 V, and the maximum anodization voltage that could be used to avoid burning and breakdown is 180 V.     

Differential binding of conA and WGA on the cell surface,the role of sialic acid in their expression and the increased activity of sialidase after cis-Platin treatment

Summary It is reported that concanavalin A (conA) and wheat germ agglutinin (WGA) have a differential binding pattern on normal mouse spleen lymphocytes and the surface of Dalton's lymphoma cells. It is suggested that sialic acid on the cell surface controls the expression of lectin binding sites. Further, it has been observed that the increased release of sialic acid from cell surfaces aftercis-dichlorodiammine platinum (II) (cis-Platin) treatment is due to the increased activity of sialidase.To whom reprint requests should be addressed.     

复合人工滑液的正交设计

利用正交实验设计配制由透明质酸HA、Lα-DPPC磷脂和γ－球蛋白3种成分构成的复合人工滑液，在PVA－H／PVA－H，PVA－H／316L SS两类人工关节摩擦副上，利用自制振子式摩擦仪测定其摩擦学参数，初步确定出复合人工滑液中3种成分的适宜配比。     

2，2—二甲基—5—（2,5—二甲苯氧基）戊酸合成反应的研究

在1-（2，5-二甲苯氧基）-3-溴丙烷与异丁腈的熔基化反应中加入相转移催化剂，生成物不经分离，直接水解，总收率可达78.2%。     

二苯羟乙酸糖酯酶促合成

二苯羟乙酸衍生物及糖类化合物分别具有重要的生理功能．二苯羟乙酸糖酯有可能同样具有一定的生理价值．本文着重对这类化合物的酶促合成进行探讨，选择定位合成二苯羟乙酸糖酯．     

均聚甲醛降解问题的探讨

对聚甲醛制品特别是均聚甲醛制品的降解在实验论证基础上，指出无论是均聚或者是共聚甲醛，在自然条件下都很难降解，并给出了降解的办法。     

多功能高效酸洗缓蚀剂的研制

利用ＤＪＳ－２９２型恒电位仪测定碳钢于各种酸中的阳极极化曲线，以比浊定量法测定酸雾挥发量，以重量法测定金属腐蚀。通过缓蚀剂的浓度、实验温度对各种酸的缓蚀效率影响，以及铁对酸洗对酸洗速度影响等各种因素的实验考察，研究了一种复合型高效酸洗缓蚀剂。     

微量元素硼对小麦生长发育及碳水化合物代谢的影响

春小麦赛洛斯用适宜浓度的认浸种和各期根外追肥的方法处理后，皆可促进小麦幼苗根系的生长发育；促进生长锥的分化和器官的形成过程；可提高主茎旗叶面积和花粉生活力；可促进小麦叶部和生殖器官糖类的合成和叶内由光合作用制造出的糖类向生殖器官的运转；春小麦赛洛斯用硼进行根外追肥的时期，从孕穗－开花期喷射效果最显；用硼进行播种前处理和根外喷射，皆能提高小麦产量。     

溴酸钾和维生素C对面包焙烤品质的影响

研究选用氧化剂溴酸钾、维生素C ,以改善面粉面筋强度 ,从而改善面包的纹理结构 ,通过对实验结果的评判 ,来判断它们对面包焙烤的影响 ,确立它们在面包制作过程中的添加量。对溴酸钾存在的安全性问题也进行了分析讨论     

Research progresses of artificial nucleic acid cleavage agents

Artificial nucleic acid cleavage agents have attracted close attention because they play important roles in biochemistry and molecular biology. According to the cleavage mechanism of nucleic acid, they are divided into three types, namely free radical, phosphodiester bond hydrolysis and elimination cleavage agents. In this review, a series of cleavage agents, including the site- and sequence-specific ones, are illustrated, and some suggestions for the future researches in this field are also put forward.