Mass Deposition,Etching and Sputtering Effects of Low-Energy N~+ Ion Irradiation on Solid Fly Ash

Fly ash is an industrial waste created when coal is burned to generate electrical power. In the present study, we used low-energy nitrogen ion implantation on fly ash to improve its surface properties. Scanning electron microscope （SEM）, fourier transform infrared spectroscopy （FTIR）, X-ray photoelectron spectroscopy （XPS） and inductively coupled plasma-atomic emission spectroscopy （ICP-AES） were used to study the changes of physical and chemical properties of fly ash after N＋ ion implantation, and the mechanism of fly ash modified by ion implantation. In the optimal implantation with energy of 5 keV and dose Of 15D0, the ion beam could effectively increase the specific surface area （approximately 150% increase） of the fly ash. Lots of scratches were generated in the surface of the fly ash after N＋ ion implantation, therefore it is good for enhancing the specific surface area. Experimental results show that the ion implantation could open the chemical bonds of Si-O, Si-A1 and Al-O, and deposit nitrogen ions on the surface of fly ash.     

低能氮离子注入固体乙酸钠的质量沉积效应

对２５ｋｅＶ氮离子束辐照固体乙酸钠引起基分子结构的变化进行了研究，通过红外光谱的测定，发现氮离子辐照乙酸钠样品后的产物中含有新的化学基团，再配合 水合茚三酮反应等化学方法，分析得知辐照后的样品中含有氰基和氨基等产物。     

Nitrogen Deposition Via N^＋ Implantation： Implications for Primordial Amino Acids Synthesis Revisited

In this paper amino acids synthesis in aqueous solution induced by ion implantation, which was possibly ubiquitous on primitive Earth, is investigated. As a discharge using a graphite rod as the anode under a nitrogen atmosphere was performed against ammonia water, it was found that three kinds of amino acids were produced. They were glycine, serine and alanine. By introducing ion implantation into the carboxylate solution, ammonia and amino acids were also formed via nitrogen deposition/fixation. Another isotopic experiment showed that both OH and H radicals played a crucial role in the arc-discharge-promoted reactions in aqueous solution Therefore, we believe that the impact of ions in the original atmospheric conditions might have functioned as a promoter in the chemical origin and evolution of life.     

"五大"体系:管理变革的"特高压"

"建设‘五大'体系是公司发展方式转变的‘特高压'."在作公司"两会"工作报告时,刘振亚总经理以此比喻建设"大规划、大建设、大运行、大检修、大营销"体系对于转变公司发展方式所具有的革命性意义.也正因此,刘振亚总经理屡次强调,要保证稳妥、注意国情,实施这一重要的组织和管理模式变革.     

The Property and Application of Arachidonic Acid

Arachidonic acid(AA) is one of the most important PUFAs(polyunsaturated fatty acids) in human body.A high-yield arachidonic acid-producing strain(mortierella aplina) was selected by ion implantation(the relative content of arachidonic acid is 70.2% among all fatty acids).This paper mainly introduced the structure,distribution,source,physiologic healthcare function and application of AA.     

钢筋混凝土井管的成井工艺

钢筋混凝土管造价为钢管的１／３，孔隙率达１７％，接近铸铁井管，而大于素混凝土井管。成井工艺：１、加大开孔尺寸，并采用两次钻孔新工艺，即先用５００ｍｍ钻头开孔，再用７００ｍｍ钻头扩孔。２、推行无棕过滤成井工艺，通过设计使滤水流速小于砂粒起动流速，并加厚滤料层至１２～１５ｃｍ。３、采用托盘下管技术。４、采用预埋钢圈与螺干，施工时周围焊接，使井管整体性、密封性能增强。５、增设集水槽，降低进水阴力及水跃值，扩大进水面积。采取上述工艺效益显著。钢筋混凝土井管每眼井费用仅及铸铁管的１／２，而涌水量是后者的２倍。水位降深，在相同流量时，前者小于后者。（唐茂元）     

离子注入胞嘧啶核苷酸的释磷动力学研究

离子注入下胞嘧啶（ＣＭＰ）核苷酸释放无机磷具有快反应和慢反应两种方式。研究了温度对慢反应过程的影响，发现辐射诱发的不稳定磷酸酯释磷反应的特殊模式：在３５３Ｋ以下和３６８Ｋ条件下分别遵循一级反应和二级反应方式，给出了反应的支这方程和速率常数。     

弧光放电产生的低能氮离子对胞嘧啶水溶液损伤作用的研究

利用N2常压弧光放电产生低能N^ ,经电场加速后注入胸嘧啶（C）水溶液,研究了低能N^ 作用后胞嘧啶水溶液的pH值、紫外、红外及核磁共振光谱的变化。结果表明,溶液PH值由于N^ 的注入而逐渐下降,低能N^ 对溶液样品造成了多种形式的损伤,形成丰富多彩的损伤产物。其中不仅包括水溶液中多种损伤碎片之间的重新化合,还包括N^ 与溶液中元素形成新的化学基团,继而与其它碎片结合形成产物,使处来的N^ “沉积”在溶液样品中。     

低能离子与脱氧腺苷酸组分水溶液作用合成脱氧腺苷酸

利用气体常压弧光放电产生低能离子,以低能N^ 注入D－2－脱氧核糖,磷酸二氢铵的腺嘌呤水溶液,用高效液相色谱,核磁共振等方法对反应产物进行分析,证明有5－脱氧腺苷酸生成,给出了产物的产额－时间曲线,并对反应机理作了初步探讨。     

低能氮离子注入固态尿嘧啶的初步研究

对 ２５ ｋｅ Ｖ 氮离子束辐照尿嘧啶引起其分子结构的变化进行了研究。通过紫外光谱的分析，得到了离子注入后尿嘧啶的残余紫外吸收曲线。傅里叶红外光谱仪的分析，说明尿嘧啶受到了一定程度的损伤。茚三酮反应的测定证明了辐射后的样品中出现了新的化学基团——氨基。