基于改进自由体积和无规因子贡献的聚合物热力学模型

给出了一个基于改进的自由体积和无规因子的聚合物溶液热力学模型，其无规因子项(NRF)用来描述聚合物溶液中聚合物与溶剂的局部交互作用对剩余Gibbs自由能的贡献，改进的自由体积项(Entropic-FV)用来描述聚合物溶液的混合效应对剩余Gibbs自由能的贡献。文中对45组二元聚合物与溶剂体系进行了关联计算，并与Zafarani-Moattar模型，Flory-Huggins模型和UNIFAC-FV模型的计算结果进行了比较，其平均绝对误差分别为1．910％，2．465％，3．738％和10．149％。     

纳米白炭黑的表面改性及其在氯丁橡胶中的应用

研究纳米白炭黑经硅烷偶联剂(Si-75)湿法改性后对氯丁橡胶抗疲劳性能的影响，并对改性剂的用量、改性工艺条件进行了优化。实验结果表明：适当改性后的纳米白炭黑可显著提高氯丁橡胶的抗撕裂和抗疲劳性能。     

HEAT TRANSFER IN PARTIALLY MISCIBLE TERNARY SYSTEMS

In the study of mass transfer between partially miscible liquids, temperature perturbations have been found to have an important effect in the generation of interfacial activity. Micro- and macro-generated interfacial convection usually occurs in combination with one another even in fairly simple heat or mass transfer events. These combinations are responsible for the enhancement of mass transfer rates. In an effort to acquire a better understanding of the heat transfer effects in ternary liquid-liquid systems, temperature difference profiles were measured when contacting two partially miscible phases. A vertical and a rotational transfer cell were designed to contact the partially miscible phases without inducing external disturbances. Five thermocouples were immersed in the bottom liquid phase at predetermined positions below the interface. In order to understand the influence of the convection generated, the vertical cell was designed to hinder convection in one phase, while the rotational cell permits convection in both phases. The experimental results showed larger temperature differences in the rotational cell after the contact of the phases. Also, systems which were initially unsaturated presented larger heat effects than those in which the partially miscible solvents were initially saturated. Several parameters indicating the importance of heat effects in the ternary systems studied are reported.     

重组人白细胞介素-10在大肠杆菌中的表达及生物学活性分析

目的在大肠杆菌中表达重组人白细胞介素-10(Interleukin-10,IL-10),并检测其生物学活性。方法将IL-10基因重组到质粒pET11c中,转化BL21(DE),提取质粒,经酶切鉴定和测序分析;在25℃用低浓度的IPTG诱导表达,对包涵体IL-10稀释复性;经ELISA检测其含量,MC/9细胞增殖法检测其生物学活性。结果工程菌IL-10/pET11c/BL21诱导表达的目的蛋白以可溶性和包涵体两种形式存在,Westernblot鉴定证实为IL-10蛋白,两种形式的IL-10均具有一定的生物学活性。结论已成功地在大肠杆菌中表达了IL-10,为进一步纯化和制备IL-10的基因工程药物打下了基础。     

气相法聚乙烯高效催化剂的进展

综述了国内外气相法聚乙烯高效催化剂研究进展概况,以及各种新型高效催化剂制备技术和性能,并对开发我国新型高效推化剂提出了看法。     

ZnO-P2O5-H2O反应体系磷酸锌颜料的防锈活性研究

采用X—ray、FT—IR、TEM硬化学分析等手段测定了ZnO—P2O5-H2O反应体系制备的磷酸锌防锈颜料的组成、结晶水、粒度分布、颗粒形貌、溶解性、润湿角、比表面积，及其在醇酸树脂中的分散性，研究其化学物理性质。结果表明：该法生产的磷酸锌含有16％未反应的氧化锌，颗粒粗大呈砖形，大部分分布在15～45μm之间；其比表面积较小，在水中溶解度小，离解程度低，在中性介质中表现为一种惰性颜料；磷酸锌在水和有机溶剂中均可润湿，但很快发生沉淀，分散性欠理想。     

Transformation of Crystal Phase of Micron-sized Rutile TiO2 and Investigation on its Sonocatalytic Activity

The partial transformation of crystal phase of micron-sized TiO₂ powder from rutile to anatase was realized utilizing microwave irradiation in hydrogen peroxide solution. Afterwards, the ultrasound of low power was used as an irradiation source to induce the transition crystal TiO₂ powder to perform the sonocatalytic activity through the degradation of azo fuchsine in aqueous solution. The results show that the sonocatalytic activity of the transition crystal TiO₂ powder is obviously higher than that of pure micron-sized rutile and anatase TiO₂ powders. The degradation ratio of azo fuchsine in the presence of the transition crystal TiO₂ powder attains nearly 80% within 80 min ultrasonic irradiation.     

Effects of sulfate-reducing bacteria on the corrosion behavior of carbon steel

The influences of the growing process of sulfate-reducing bacteria (SRB) in seawater system on the medium state and corrosion behavior of carbon steel were studied by detecting solution state parameters and using corrosion electrochemical methods. The growing process of SRB in the seawater shows the three stages of growing, death and residual phases. The solution state parameters of the concentration of sulfide, the pH value and the redox potential changed during the three stages of the SRB growing process. And the corrosion rate of D36 carbon steel was accelerated during the growing phase and stable during the death and residual phases. The results indicate that the medium state and the corrosion rate of the steel do not depend on the number of active SRB, but depend on the accumulation of the metabolism products of SRB.     

Structure, thermal-stability and reducibility of Si-doped Ce–Zr–O solid solution

The Si-doped Ce–Zr–O solid solutions have been prepared by the reverse microemulsion method. The effects of Si and its content on the structure characters, thermal-stability and reducibility of the Ce–Zr–O solid solution have been studied by N₂ adsorption, XRD, laser Raman (LR), TPR, FT-IR, NMR and XPS methods. The results indicate that, there are the bonds of Si–O–M (Ce or Zr) in the Ce–Zr–Si–O solid solutions, and the presence of Si can increase obviously the surface area, thermal-stability, crystal lattice distortion rate, and reducibility of the solid solution. The surface area of the sample with 20 wt.% Si reaches 153 m² g⁻¹ after being calcined at 900 °C for 6 h. The Ce–Zr–O solid solution with 5.2–10 wt.% Si shows excellent thermal-stability and reducibility.     

氰烯菌酯(JS399-19)防治水稻恶苗病的研究

氰烯菌酯(JS399-19)是一种结构新颖、作用方式独特的高效杀菌剂。离体抑菌活性测定表明,JS399-19对水稻恶苗病多菌灵敏感菌株和抗性菌株均有相似活性,EC50为0.1612～0.3136μg/mL,EC95为1.5387～6.0455μg/mL;持效性测定表明,JS399-19在10d内对恶苗病菌的抑菌率是稳定的,抑菌率为77.9%～81.4%;种子安全性试验表明,以25%JS399-19SC1:1000倍浸种处理对水稻种子的发芽势有一定的影响,但不影响发芽率、出苗率及成苗率,1:2000、1:3000、1:4000倍浸种处理时水稻种子的发芽势、发芽率、出苗率成苗率等均与空白对照无明显差异;温室小区筛选试验表明,当25%JS399-19SC1:500、1:1000、1:2000、1:3000浸种处理时30d防效均为100%,1:4000倍时防效大于92%;初步应用技术研究表明,JS399-19防治水稻恶苗病,浸种处理剂量为1:3000～4000倍,当浸种温度为15～20℃时,浸种时间以48～72h为宜。本研究为氰烯菌酯防治水稻恶苗病的应用开发提供了依据。