汞阳极氧化的电化学

粗汞含有众多杂质金属，杂质多数以ＨｇｘＭｙ，ＨｇＭ化合物、合金状态溶于汞中，从而影响其在电解过程中的分离效果，利用杂质与汞形成的合金的化学特点和易氧化的特性，在特殊的电解条件下，杂质汞合金阳极氧化固态氧化物微粒与汞分离。实践表明汞阳极氧化法具有效果好、节省能源、减少废液对环境的污染等优点。以其代替汞阳极电解法，作为高纯汞、超纯汞制备过程中的前级提纯方法，能获得更好的效果与效益。     

sHsps and their role in the chaperone network

Small Hsps (sHsps) encompass a widespread but diverse class of proteins. These low molecular mass proteins (15—42 kDa) form dynamic oligomeric structures ranging from 9 to 50 subunits. sHsps display chaperone function in vitro, and in addition they have been suggested to be involved in the inhibition of apoptosis, organisation of the cytoskeleton and establishing the refractive properties of the eye lens in the case of α-crystallin. How these different functions can be explained by a common mechanism is unclear at present. However, as most of the observed phenomena involve nonnative protein, the repeatedly reported chaperone properties of sHsps seem to be of key importance for understanding their function. In contrast to other chaperone families, sHsps bind several nonnative proteins per oligomeric complex, thus representing the most efficient chaperone family in terms of the quantity of substrate binding. In some cases, the release of substrate proteins from the sHsp complex is achieved in cooperation with Hsp70 in an ATP-dependent reaction, suggesting that the role of sHsps in the network of chaperones is to create a reservoir of nonnative refoldable protein.     

M(II)-氨基酸水杨醛席夫碱-ATP三元配合物稳定性研究

用pH电位滴定法测定了Zn2+,Cu2+,Ni2+和Co2+与氨基酸水杨醛席夫碱及ATP形成的三元配合物的稳定常数,发现logβ111与pk2之间存在很好的线性自由能关系,研究了三元配合物中配体间的疏水相互作用.     

不确定环境下语言信息集结算子研究

简述了语言信息集结算子的概念及其发展,根据属性权重不同划分了不确定环境下语言信息评价的类型,并对其进行了系统的分析,深入探讨了语言信息评价的研究趋势。     

虎杖苷对血栓形成及血小板与中性粒细胞间相互作用的影响

 采用电刺激大鼠颈动脉血栓形成和结扎大鼠下腔静脉方法评价虎杖苷(polydatin,PD)的抗血栓形成作用;应用玫瑰花结试验和Born比浊法观察PD对血小板与中性粒细胞之间的相互作用.实验结果显示:PD对电刺激大鼠颈动脉及结扎大鼠下腔静脉引起的血栓形成具有明显的对抗作用;PD明显抑制凝血酶引起的血小板与中性粒细胞间的粘附作用和肉豆蔻佛波醇(N-formyl-methiongl-leucyl-phenylalanine,fMLP)激活的中性粒细胞悬液引起的血小板聚集作用,其半数抑制浓度(medium inhibitory concentration,IC₅₀)分别为51.9,307.6μmol/L.本实验提示PD有明显的抗血栓形成作用,其机制与阻抑血小板与中性粒细胞间的相互作用密切相关.     

CTAB对不同中和度聚丙烯酸溶液粘度行为影响

利用聚丙烯酸（PAA）和聚丙烯酸钠（NaPAA）的水溶液作为溶剂,测定了不同浓度的十六烷基三甲基溴化铵（CTAB）在高分子溶剂中的相对粘度ηr,结果表明：对PAA溶液来说,随着CTAB浓度的增加,其ηr经历了迅速下降、保持恒定和迅速上升直到溶液中出现沉淀的过程;对NaPAA溶液来说,随着CTAB浓度的增加,其ηr虽然同样经历了迅速下降、保持恒定和迅速上升的过程,但是NaPAA溶液ηr上升幅度显著减小.当NaPAA中和度达到0.042时,NaPAA溶液ηr上升的幅度完全可以忽略,溶液也不出现沉淀.溶液中高分子链电荷密度的不同是导致PAA和NaPAA与CTAB在溶液中聚集行为不同的根本原因,具体表现为PAA溶液和NaPAA溶液ηr对CTAB浓度依赖性出现显著差异.     

Development and Research on the Internet Resources Aggregation Platform

We proposed an Intemet resource aggregation platform based on semantic web. The platform includes an Web Ontology Language（OWL） ontology design toolkit（VO-Editor） and a selective inference algorithm engine so that it can visually editing ontology and using novel selective reasoning for information aggregation. We introduce the VO-Editor and the principle of selective inference algorithm. At last a case of budget travel system is used to interpret the approach of Internet resources aggregation by this platform.     

Protein aggregation as primary and characteristic cell reaction to various stresses

Ehrlich carcinoma and EL-4 thymoma ascites cells were subjected in vitro to heat shock, ATP depletion, oxidative stress, Ca²⁺ overlading and iodoacetamide treatment. After the transient stresses, Triton (X-100)-insoluble TIS) fractions were isolated from the cells and analysed by electrophoresis and immunoblotting. All stresses used caused rapid aggregation of cell proteins. This was manifested in a signficant rise in protein content in the TIS fractions. The protein increase was mostly due to and increase in the insolubility of actin, 57 kDa protein of intermediate filaments, 70 kDa heat shock protein (HSP 70), and some specific proteins whose insolubilization was a characteristic sign for each type of cell injury. Different survival rates in the cell lines after either stress corrlated well with differences in their TIS protein accretion. Possible mechanisms for stress-induced protein aggregation and its relationship with cell viability are suggested.     

分维度随相互作用的变化

讨论了粒子之间的相互作用对其分形聚集的影响.根据SAK模型导出了分维度与相互作用能的关系,结果表明:随着粒子间相互吸引能的增加,聚集的分维度减小.从而解释了现有的实验结果和计算机模拟结果.     

Special IR properties of palladium nanoparticles and their aggregations in CO molecular probe infrared spectroscopy

Dispersed Pd nanoparticles (Pdn) have been synthesized by reducing H2PdCI4 with ethanol, and stabilized using poly(vinylpyrrolidone) (PVP). The Pdn is applied to the glassy carbon substrate to form a thin film, and then the potential cyclic scanning at 50 mV.s^-1 from -0.25 to 1.25 V was carried out for about 30 min to form the aggregations of Pdn (Pdn^ag). FTIR spectroscopy of both transmission and reflection modes was employed to study CO adsorption on Pdn and Pdn^ag in both solidlliquid and solidlgas interfaces. It has been revealed that CO adsorption on Pdn film yields two IRbands near 1964 and 1906 cm-1, which are assigned to IR absorption of CO bonded on asymmetric and symmetric bridge sites, respectively. In contrast to the IR properties of CO adsorbed on Pdn, only species of CO bonded on asymmetric bridge sites was determined on Pdn^ag, and the direction of the IR band near 1963 cm^-1 is completely inverted. The full width at half-maximum (FWHM) of the COB^as band near 1964 cm^-1 is measured to be 14 cm^-1 on Pdn film, while it is 24 cm^-1 on Pdn^ag film. The results of the present study demonstrated that the inverting of the IR band direction is a general phenomenon that is closely related to the interaction between nanoparticles in aggregation of Pdn.