基因工程菌株EscherichiacoliC600（pRLK14）的流加培养

在１Ｌ搅拌发酵罐中对含有重组质粒ｐＲＬＫ１４的大肠杆菌进行了培养。结果表明，采用二段培养法，于３４℃增殖细菌，在对数增殖后期升温到４２℃进行诱导，可以高效表达基因产品半乳糖激酶。诱导期，醋酸浓度增长较快，模拟实验表明，控制醋酸浓度可进一步提高半乳糖缴酶产率。     

In situ Synthesis of Oligonucleotides on Plasma Treated Polypropylene Microporous Membrane

Polypropylene microporous membranes were treated with plasma in a mixture of N2 and H2 (1:2 in volume). Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and ultra-violet (UV) spectra demonstrated the success of grafting amino groups. The density of the polar amino groups on the membrane surface is about 0.59 μmol/cm^2. The as-treated membranes were successively applied to the in situ synthesis of oligonucleotides and an average coupling yield was more than 98%. The surface feature of the treated membrane is suggested to be responsible for its advantage over a glass slide.     

6－S－（取代的三或四唑杂环基）－1，2：3，4－二－O－异亚丙基－α-D吡喃型半乳糖的合成研究

报道了6－O－对甲苯磺酰基－1，2：3，4－二－O－异亚丙基－α-D吡喃型半 乳糖（3）与取代的3－巯基三唑或5－巯基四唑4a-4c或5a-5f的亲核取代反应，合 成了9个6－S－（取代的三或四唑杂环基）－1，2：3，4－二－O－异亚丙基－α- D吡喃型半乳糖（6a-6i），通过元素分析，IR，NMR和MS确证了上述化合物的结构 ，并经分子模型计算进行了其构象分析。     

甘油糖脂的合成 Ⅰ.1,2-二-O-脂酰基-3-O-(α-D-吡喃半乳糖基)-sn-甘油的合成

采用一种有效的方法合成了具有不同链长的二脂酰基α D 半乳糖型甘油糖脂 .将半乳糖烯丙苷化 ,重结晶得到α D 半乳糖烯丙苷 .随后将糖环的羟基用苄基保护 ,再利用OsO4 /NMO(N 甲基 N 氧吗啉 )的二羟基化条件将 1 O烯丙基氧化成为邻二羟基 ,得到 3 O ( 2′ ,3′ ,4′ ,6′ 四 O 苄基 α D 吡喃半乳糖基 ) sn 甘油 .其与不同链长的脂酰氯进行脂酰化反应 ,然后氢解去掉苄基得到五种二脂酰基α D 半乳糖苷基甘油 .利用1HNMR ,13 CNMR ,2DNMR ,IR和MS对化合物的结构进行了确证 .     

Expression and Purification of ZNF191（243-368） in Three Expression Systems

ZNF191 （243-368）, a new human zinc finger protein, probably relates to some hereditary diseases and cancers, To obtain adequate amount of ZNF191（243-368） for the study of its property, structure and function, three different expression systems of inclusion-body, glutathione S-transferase （GST）, and hexahistidine （6 × His） were used and compared. Among these systems, the expression level of ZNFI91（243-368） was increased in inclusion body system under a higher isopropylthio-β-D-galactoside （IPTG） concentration, but the non-target proteins were also increased more, which made its purification more difficult and the yield lower. The expression of His-tag fusion protein was almost not affected by IPTG concentration, temperature and inducing time. At a high IPTG concentration the highest expression yield for GST fusion protein was obtained. And the fusion proteins can be partially purified by a single affinity chromatography step. The fusion protein systems show advantages for expression of these proteins.     

基于微机械加工技术的双腔型生物传感器

利用微机械加工技术研制了具有三维结构的腔型传感器，双腔型工作电极与Ag/Agcl参比电极集成在同一微芯片上。考察了微腔型电极的电化学特性及其对H2O2含量的测定。并以此为基础电极制备了半乳糖、葡萄糖双腔型生物传感器。结果表明，该传感器可同时测定半乳糖、葡萄糖双组分，线性上限分别为4．5mmol/L和4．0mmol/L。而且在测试双组分过程中，没有观察到明显的交叉干扰现象。     

Characterization of Galactosyl-neoglycoalbumin by MALDI-TOF-MS

Matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS, model AXIMA CFR ) was used to analyze galactosyl-HSA (human serum albumin) synthesized in our laboratory. It clearly showed that HSA covalently combined with galactoses. Galactosyl-HSA is pure and the ratio of galactosyl residues to protein is 48:1.     

碳苷研究 XXIII. 三-O-乙酰基葡萄糖和半乳糖碳苷的合成及结构的测定

本文报道了葡萄糖和半乳糖碳苷的选择性乙酰化。通过比较四-O-乙酰基和三-O-乙酰基碳苷的^1H NMR谱证明糖环的2位羟基没有发生乙酰化。三-O-乙酰基半乳糖碳苷的构型用^1^3C NMR进行了鉴定。由其^1H NMR谱与通常规律相反的原因, 讨论了乙酰化的机理。     

溶剂对钯催化的叔丁基乙炔低聚反应化学选择性的调控作用

报道了溶剂对钯催化的叔丁基乙炔低聚反应化学选择性的调控作用. 反应可在苯-正丁醇双组分溶剂体系中顺利进行, 当双组分溶剂体系中苯占优势比例时, 反应发生递次的三分子炔烃顺式插入, 经由顺式s-烯钯中间体生成环三聚产物1,3,5-三叔丁基苯; 而当双组分溶剂中正丁醇组分上升至一定比例, 反应选择性生成(3Z,5Z)-2,2,7,7-四甲基- 3,6-二氯-3,5-辛二烯或(3Z,5Z)-2,2,7,7-四甲基-3,6-二溴-3,5-辛二烯, 这是由于正丁醇可显著加快C—Pd σ键的断裂, 并与叔丁基乙炔、σ-烯钯中间体形成弱氢键作用力, 同时也与Pd(II)和Cu(II)等离子存在配位效应. 在强极性质子溶剂H₂O中, 反应生成偶联双炔: 2,2,7,7-四甲基-3,5-辛二炔. 文中就反应溶剂体系、钯铜催化剂及反应可能机理等分别进行了探讨.