Studies on the Interaction of Beryllon Ш with Proteins by Voltammetric Technique and its Application

A new quantitative determination method of proteins using beryllon Ш by voltammetric technique was developed in this paper. In pH 3.5 Britton-Robinson (B-R) buffer solution, beryllon Ш can bind with human serum albumin (HSA) to form an electro-inactive supermolecular complex. Beryllon Ш has a well-defined voltammetric reduction peak at -0.38 V (vs. SCE) and the addition of protein in this solution can cause the decrease of the reductive peak current. Based on the decrease of the reduction peak current, a new electrochemical method for the determination of HSA was established with linear range of 1.0~40.0 mg/L and the detection limit of 1.0 mg/L. This method is further applied to the determination of real sample of healthy human serum.     

Alkaloids from Fritillaria Hupehensis

Phytochemical investigation of the bulbs of Fritillaria hupehensis resulted in the isolation and structural elucidation of a new highly conjugated alkaloid of veratramine type identified as 3β,23β-dihydroxy-7,12（14）-dien-5α- veratramin-6-one （1）, together with two known alkaloids, ebeinine （2） and zhebeinine （3）, which were isolated for the first time from F. hupehensis. The structures of alkaloids 1-3 were established by extensive 1D and 2D NMR spectral analyses.     

β沸石分子筛固体酸的制备及其在异丁烷和丁烯烷基化反应中的应用

以四乙基溴化铵(TEABr)为模板剂，硅胶为硅源，铝酸钠为铝源，采用水热晶化法合成β沸石．研究了其晶化温度、晶化时间、硅铝比、碱度、水含量等各种因素对晶化过程和产物性质的影响．得出适宜的初始凝胶组成为SiO2和Al2O3的比值在25-60之间，TEABr和SiO2的比值在0．32～0．4之间，OH^-和SiO2的比值在0．2～0．23之间，H2O和SiO2的比值在8．6～18．0之间．通过XRD，ICP，IR，SEM和NH3-TPD方法分别对样品的结构和性质进行了表征．烷基化反应的结果表明，β分子筛具有较为适宜的孔结构和反应活性．     

CH_3O与CIO双自由基反应机理的量子化学研究

在QCISD(T)/6-311+G(d,p)//B3LYP/6-311+G(3df,3pd)水平上,对CH3O与ClO双自由基反应进行了理论研究.结果表明,该反应共有三个反应通道,产物分别为HOCI+CH2O,CH2O2+HCl和CH3Cl+O2(1△).不论从动力学角度,还是从热力学角度看,形成产物HOCl+CH2O的通道均是最有利的,因此为主要反应通道,这与实验观察到的结果是一致的.     

导数阴极溶出方波伏安法测定卡那霉素注射液含量

研究了汞 卡那霉素络合物的电化学行为 ,并建立了导数阴极溶出方波伏安法测定卡那霉素注射液含量的方法。在 pH 4 .7的HOAc NaOAc缓冲溶液中 ,在约 0 .12 6V (vs.SCE)处出现一个汞 卡那霉素络合物的还原峰 ,卡那霉素的浓度在 0 .0 2～ 1.5mg·ml- 1之间与导数方波伏安图的峰高存在良好的线性关系 ,回归方程ip(10 - 4A) =3.6C(mg·ml- 1) + 0 .4 6 ,相关系数为 0 .992 0。方法简便、灵敏、准确 ,可用于卡那霉素注射液含量测定     

Studies on Colloidal Properties of Mixed Metal Hydroxide－Clay Aqueous Suspension

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Synthesis of Tetra—Schiff Base Macrocyclic Compound Containing Benzo—12—crown—4

Tetra-Schiff base macrocyclic compound containing benzo-12-crown-4 was synthesized via condensation of 2,6-diformyl-4-methyl-phenol with 4′，5′-diaminobenzo-12-C-4 promoted by proton. The compound was characterized by MS,IR ^1HNMR spectroscopy and elemental analysis.     

2型糖尿病患者血清钙镁与甲状腺激素含量变化及临床意义

为了监测 2型糖尿病人血清钙、镁和甲状腺激素含量 ,分析其临床意义及相关性 ,应用放射免疫分析法测定了 1 1 5例 2型糖尿病及 1 5 0例健康人血清甲状腺激素含量。同时用美国杜邦RXL自动生化仪测定了其血清钙、镁含量。结果表明 ,在 2型糖尿病伴有明显并发症者血镁、FT3水平明显降低 (P <0 0 5 ) ,钙镁两种元素与甲状腺激素水平无明显相关性。 2型糖尿病患者适当补镁对预防其并发症是有益的 ,测定FT3 等可作为判断 2型糖尿病严重程度和估计预后的参考指标。     

趋磁细菌(MTB)吸附Pd2+的实验研究

以趋磁细菌MTB作为吸附剂,吸附溶液中的Pd2 ,对影响吸附的因素进行了实验研究。结果显示,MTB对溶液中Pd2 的最佳吸附条件为:pH=1~5,菌体浓度在6g/L左右,Pd2 初始浓度为20mg/L~80mg/L,室温条件下吸附30min。吸附过程遵循准一级动力学方程和Langmuir等温吸附模型。     

Studies on Ring—Opening Polymerization of Chloromethyl Thiirane with Rare Earth Catalysts and Functional Resins Synthesized therewith

Studies on ring-opening polymerization of chloromethyl thiirane with rare earth catalysts and functional resins synthesized therewith were reviewed.