Chemical preparation and investigation of Fe-P-B ultrafine amorphous alloy particles

A series of Fe-P-B ultrafine amorphous alloy particles has been prepared by the chemical reduction method The composition and size of the particles have been effectively adjusted.Mossbauer spectroscopy in addition to sonic other techniques has been used to investigate the reaction process,the factors that influence the preparation,the crystallization of the particles,and the interactions between the components within them.The results indicate that the co-deposition of iron,phosphorus and boron atoms in the solution at room temperature forms Fe-P-B amorphous alloy particles,and a preferential bonding of Fe-P bond to Fe-B one exists in the particles.     

Fractal phenomena in molecular mechanics calculation

It is proposed that in molecular mechanics calculation points belonging to various stable or meta-sta-ble conformtrs are mixed up and form fractal structures in conformation space.The calculation results show the following two phenomena:(i)Two levels of structure with fractal feature were observed.Around the conformer without mirror symmetry points belonging to the conformer and its enantiomer are mixed up and form the first level of fractal structure; on the boundary of the attractive basin o{ each atlractor,points belonging to different attractors form the second level of fractal structure.(ii) The variation of molecular mechanics parameters will influence the structure and area of each attractive basin significantly The above phenomena may become the basis of a new method for solving the troublesome multi-minimum-point problem in molecular mechanics calculation.     

堇青石窑具多晶结构与性能研究

利用X-射线衍射分析和电子显微镜分析的结果，确定堇青石窑具的多晶结构和各晶相的含量；结合窑具性能的研究，确定堇青石窑具具有优良性能的适宜配方。     

异咯嗪蒙脱石修饰电极的电化学行为

应用十六烷基三甲基溴化铵对蒙脱石进行改性，成功地制备稳定性良好的异咯嗪蒙脱石修饰电采，用循环伏安法对此修饰电极的电化学行为进行了研究。测定了异咯嗪在蒙脱石膜内的化学扩散系数，对异咯嗪在改性蒙脱石中电极反应机制进行了探讨。     

化学实验操作技能测评可靠性分析

化学实验操作技能测评一般包括三个方面：一是实验操作过程的评定,二是实验结果的评定,三是完成实验所需时间的测量。有关测评的可靠性间题目前还少见报导。本人有幸接触到一次职业高中化学分析工(初级工)技术等级考核的过程和基础资料,经数据统计后,试对其可靠性作一初步的分析探讨。     

表面电沉积Ni—La2O3复合镀层的Fe26Cr1Mo不锈钢的氧化行为研究

Ｆｅ２６Ｃｒ１Ｍｏ不锈钢在９００℃氧化时，生成的氧化层在冷却过程中大量剥落，经表面共电沉积ＮｉＬａ２Ｏ３复合镀层后，抗热循环能力明显提高。     

触头用银合金粉末的氧化性能和氧化后的组织结构

通过热重实验和扫描电子显微等方法，研究了４种触头用银合金粉末的氧化性能及氧化后的组织结构。发现Ａｇ－Ｓｎ－ＲＥ合金粉末氧化以后，在粉末表层形成一层纯银层，其组织结构理想；它的氧化性能最好，适于制备触头材料。Ａｇ－Ｓｎ－ＲＥ合金粉末的优良氧化性能与其氧化后理想的组织结构有关。稀土元素可以降低合金粉末的氧化温度，其它影响作用有待于进一步研究。     

高效液相色谱法定量分析人胎肝细胞上清液及细胞裂解液中7-酮基胆固醇

用高效液相色谱法定量分析了７－酮基胆固醇在胎肝细胞上清液及细胞裂解液中的含量。色谱柱为μ－ＰｏｒａｓｉｌＳｉＯ２柱,流动相为正己烷∶异丙醇（９１∶９,Ｖ／Ｖ）。方法回收率高、色谱重复性好、分析速度快。     

植物中酞酸酯的分析测定研究

建立了二氯甲烷超声提取、小粒径硅胶住色谱项分离、UV-HPLC测定植物中酞酸酯的方法,简便、快速,可使酞酸酯与杂质有效分离,回收率为85％～101％。用于实际植物样品中酞酸酯的测定,结果满意。     

高效凝胶过滤色谱法分离测定豆薯种子蛋白

用高效凝胶蛋白往分离豆薯种子蛋白租提液,结合光电二极管阵列检测器对分离的蛋白峰进行紫外光谱扫描来确认蛋白的纯度,测定了3种蛋白的分子量,采用邻苯二甲醛（OPA）柱后衍生法测定了豆薯种子蛋白的氨基酸含量。