藻胆蛋白规模分离纯化及其应用研究通过鉴定

由中国科学院海洋研究所王广策研究员完成的“藻胆蛋白规模分离纯化及应用”课题不久前通过了山东省科技厅组织的专家鉴定委员会的成果鉴定。专家鉴定委员会一致认为：该研究成果创新性明显，总体达到国际领先水平。     

高固含量聚合物乳液制备方法新进展

高固含量一直是聚合物乳液制备追求的目标 ,本文将高固含量 (>6 0 % )聚合物乳液的制备方法按机理分为控制乳胶粒直径分布 ,增大乳胶粒直径和使乳胶粒发生形变三类 ,详细评述了各种制备方法的研究进展 ,并对高固含量乳液制备的发展进行了展望。     

病毒性肝炎、肝硬化与微量元素

（1）病毒性肝炎与微量元素锌、硒、铜有关：张冠群等测定了128例乙肝患者血清微量元素含量。结果显示，慢性乙肝患者血清锌、铜、铁含量低于常人，急性肝炎患者血清锌铜铁与常人无差异。任仲轩测定了47例老年慢性病毒性肝炎患者与45例非老年患者血清微量元素含量。结果显示，两组锌、铜、硒含量皆低于健康对照。王晋升等测定了122例急慢性肝炎患者血清微量元素含量。     

金属疏蛋白与人体内铜锌元素的代谢

金属巯蛋白是一类富住房物化学结构及为特殊的内源性蛋白，它构成机体内金属元素的新陈代谢中快速应签的缓冲体系。尤其在铜，锌两种元素的吸收，转运，排泄方面发挥着重要作用。     

硒与消化系统癌关系的探讨

据不同地貌、地质条件在30个县市按剖面、同步、随机取土壤样品372份．测定硒等微量元素含量．作等级相关分析显示。土壤硒含量与消化系统癌呈负相关关系．作相对危险度、剂量-效应及多因素分析,认为此负相关关系并非偶然现象．     

苏州荠苧总黄酮与微量元素含量的测定

采用分光光度法测定了苏州荠芋的总黄酮含量；采用了等离子发射光谱法测定了其元素含量。结果表明，苏州荠芋总黄酮的含量分别为55．31mg/g(7月采收)、65．00mg/g(8月采收)；含K、Ca、Mg等多种常量元素；含Cu、Fe、Mn、Zn、Cr、Co等多种人体必需的微量元素，其中Fe含量最高；而有害重金属元素Hg未检出，Pb和AS的含量均较低(小于药典规定量)。可见8月采收的苏荠芋总黄酮含量较高，苏州荠芋含多种人体必需的微量元素，有害重金属含量低，具有较大的开发价值。     

人参属植物中水溶性非蛋白氨基酸与寡肽的研究

从人参属植物水提取液中分离鉴定了若干具有生物活性的非蛋白氨基酸,如神经抑制性递质,γ－氨基丁酸（GABA）,神经兴奋毒素,β－N－草酰基－L－α,β－二氨基丙酸（β－N－ODAP）。首次从人参根的水提取液中分离纯化与鉴定了一组N－末端为从谷氨酸,并以其γ－羧基形成肽键为特征的七个寡肽;其结构为P－Ⅰ（氧化型谷胱甘肽,GSSG）P－Ⅱ（氧化型谷胱甘酰胺）,P－Ⅲ[N, N‘-双－（γ－谷氨酰甘氨酰）胱氨酸,IGSSG]与P－Ⅳ（N－γ－谷氨酰胱氨酰－双－甘氨酸）,P－Ⅴ-（N,N‘-双－γ－谷氨酰胱氨酰甘氨酸）,P－Ⅵ（γ-谷氨酰精氨酸）与P－Ⅶ（还原型谷胱甘肽）。化合物P－Ⅱ至P－Ⅴ与P－Ⅶ均与氧化型谷胱甘肽有关。P－Ⅱ至P－Ⅵ的结构均经化学合成确证。化 合物P－Ⅲ为未见报道的新生物活性肽,具有比化合物P－Ⅰ强的促睡眠活性。同时还讨论了β－N－ODAP与GABA以及其它化合物的生物活性。     

A New 4.0-Generation Dendrimer Phosphorescence Labeling Reagent and Its Application to Determination of Trace Alkaline Phosphatase by Affinity Adsorption Solid Substrate-room Temperature Phosphorimetry

A Triton X-100-4.0G-D （4.0G-D refers to a 4.0-generation dendrimer） was brought forward as a new phosphorescence labeling reagent. Two types of specific affinity adsorption （AA） reactions （direct method and sandwich method） were carried out between the labeling product of Triton X-100-4：0G-D-Wheat germ agglutinin （WGA） and alkaline phosphatase （ALP）, the product of AA reaction preserved the good characteristics of room temperature phosphorescence （RTP） of 4.0G-D and △Ip of the product was proportional to the content of ALP. According to the fact stated above, a new method for the determination of trace ALP by affinity adsorption solid substrate-room temperature phosphorimetry （AA-SS-RTP） was established on the basis of WGA labeled with the Triton X-100-4.0G-D. The detection limits were 0.20 ag·spot^-1 （corresponding concentration： 5.0×10^-16 g·mL^-1, namely 5.0×10^-18 mol·L^-1） for a direct method and 0.14 ag·spot^-1 （corresponding concentration： 3.5×10^-16 g·mL^-1, namely 3.5×10^-18 mol·L^-1） for a sandwich method, respectively. For their high sensitivity, good repeatability and high accuracy, the direct method and sandwich method have been successfully appfied to determine the content of ALP in human serum, and the results were coincided with the clinical detection results of the enzyme-linked immunosorbent assay method by the Zhangzhou Hospital of Traditional Chinese Medicine. Meanwhile, the mechanism for the determination of trace ALP by AA-SS-RTP was discussed.     

毛细管电泳法研究提取剂对黄连-黄柏共煎剂中生物碱含量的影响

用毛细管电泳法,对黄连与黄柏配伍后共煎剂中的主要生物碱进行了分析。以50 mmol/L Na2B4O7(pH=7)-CH3OH(85:15,V/V)为背景电解质,操作电压为14 kV,电迁移进样10 kV×5s,柱上223 nm检测,5种主要生物碱9 min内可在50 cm×75μm毛细管上实现基线分离。以小檗碱、巴马汀的提取量为指标,分析了提取剂对提取效果的影响。以30％的乙醇水溶液为提取剂,可得到最大煎出量。     

Aluminum Lon Removal from Monoaluminum Ovotransferrin by Pyrophosphate

The rates at which aluminum was removed from the N- and C-terminal monoaluminum ovotransferrins by pyrophosphate were evaluated by UV difference spectra in 0.01 mol/L Hepes, pH=7.4 and at 37℃. Pesudo first-order rate constants as a function of pyrophosphate concentration were measured. The results indicate that the pathways of aluminum removal are different. For the N-terminal binding site, aluminum removal follows simple saturation kinetics, while the removal of aluminum from the C-terminal binding site reverts to the combination of saturation and first-order kinetics. The saturation component is consistent with a rate-limiting conformational change in the protein as has been reported. We propose that the first-order kinetics mechanism is attributed to a pre-equilibrium process. The rate constants of saturation kinetics are accelerated from both terminals with the addition of 0.1 mol/L chloride to the monoaluminum ovotransferrin solutions, whereas the rates of the first-order kinetics are decreased for the C-terminal binding site. The effect of chloride ionic strength causes a continuing increase on kobs for the N- and C-terminal binding sites. Moreover, the kinetics behavior of the N-terminal is more easily affected by chloride than that of the C-terminal. In the experiment presumably the N-terminal site is apparently kinetically more labile than the C-terminal site.