纯铁液中Y—O、Y—S平衡

本工作应用放射性同位素~(90)Y,通过将试样在低温有机电解液中电解的方法分离稀土夹杂物,测定了铁液中溶解态的稀土含量。用ZrO_2(MgO)固体电解质组成的定氧测头测定了铁液中氧的活度。用硫化氢气体发生法测定并计算了铁液中溶解态的硫含量。由此得出1560～1660℃范围内Y—O平衡常数与温度的关系式以及1600℃下Y—S平衡常数值,并测定了Y对O,Y对S的活度相互作用系数e_O~Y、e_S~Y及其它有关热力学数据。     

Phytate: impact on environment and human nutrition. A challenge for molecular breeding

Phytic acid （PA） is the primary storage compound of phosphorus in seeds accounting for up to 80% of the total seed phosphorus and contributing as much as 1.5% to the seed dry weight. The negatively charged phosphate in PA strongly binds to metallic cations of Ca, Fe, K, Mg, Mn and Zn making them insoluble and thus unavailable as nutritional factors. Phytate mainly accumulates in protein storage vacuoles as globoids, predominantly located in the aleurone layer （wheat, barley and rice） or in the embryo （maize）. During germination, phytate is hydrolysed by endogenous phytase（s） and other phosphatases to release phosphate, inositol and micronutrients to support the emerging seedling. PA and its derivatives are also implicated in RNA export, DNA repair, signalling, endocytosis and cell vesicular trafficking. Our recent studies on purification of phytate globoids, their mineral composition and dephytinization by wheat phytase will be discussed. Biochemical data for purified and characterized phytases isolated from more than 23 plant species are presented, the dephosphorylation pathways of phytic acid by different classes of phytases are compared, and the application of phytase in food and feed is discussed.     

痕量铁的分析

综述了近年来测定痕量铁的进展状况,预测和展望了测定痕量铁的要求及发展方向,包括光度法、电化学法及质谱法。     

新鲜铁表面锈蚀过程的拉曼光谱研究

实验采用共焦显微拉曼光谱技术测量水体系中的纯铁电极表面,获得了铁电极表面在激光照射下生成的氧化铁物种随时间而变的拉曼光谱,得到了铁电极表面在拉曼光谱测量中生成的锈蚀产物的结构变化过程。     

动力学光度法测定高纯碳酸锂中痕量铁

基于在稀氨水介质中,痕量铁可催化过氧化氢氧化碱性品红褪色的反应,建立了一种动力学光度法测定高纯碳酸锂中痕量铁的新方法,该方法线性范围为0-2ug/25mL,检出限为1.8×10-10g/mL.用于高纯碳酸锂中痕量铁的测定,获得令人满意的结果.     

PLC在钢铁工业中的应用与发展方向

本文首先介绍了PLC区别于其它控制设备的特点,以及近几年PLC在钢铁工业领域的应用情况,最后根据PLC在钢铁工业中应用现状,探讨了PLC应发展的方向。     

矿业废弃地园林植物应用综合评价与选择

随着城市化进程的不断加快,加剧了矿业的发展势头,矿业废弃地的生态恢复和开发利用越来越受人们所关注。本文针对迁安马兰庄铁矿排土场土壤的质量特征,应用特尔菲法对在唐山地区边坡绿化应用广泛的27种园林植物进行综合评价。研究表明:适宜迁安马兰庄铁矿排土场生态恢复,材料可以产生较高的环境效益;其次,不适宜的园林植物材料,要控制使用,以免浪费人力、物力、资金。     

铁催化砜基碳负离子的烯烃化反应中的异构化现象

分析铁催化α砜基碳负离子的烯烃化反应中的双键异构化现象。推测反应中的烯烃异构化是由于反应所生成的铁氢复合物催化作用，双键异构化过程可以推测为铁氢复合物的加成－消除机理．提出铁氢复合物可能形成机理．     

浅谈对太钢新炼钢连铸机检修工作的管理

结合太钢150万t新炼钢连铸1年多的工作（连铸机检修功能性承包）实践。总结了在铸机设备检修管理工作的一些经验和体会.     

Facile cathodic electrosynthesis and characterization of iron oxide nano-particles

Fe2O3 nano-particles have been synthesized by simple cathodic electrodeposition from the low-temperature nitrate bath.The morphology and crystal structure of the obtained oxide powder were analyzed by means of scanning and transmission microscopy(SEM and TEM),X-ray diffraction(XRD) and Fourier transform infrared(FTIR) spectroscopy.Thermal behavior and phase transformation during the heat treatment of as-deposited sample were investigated by differential scanning calorimetry(DSC) and thermogramimetric analysis(TGA).The results showed that the deposited Fe2O3 was composed of the nanoparticles with grain size of approximately 10-60 nm.A serious problem during cathodic electrodeposition of iron oxide was splashing of deposit into electrolyte due to its low adhesion.This problem was tackled by reducing the bath temperature and dielectric constant of solvent.