分子印迹技术在食品痕量分析中的应用

分子印迹技术是一种制备对特定目标分子具有高度特异性和选择性分子识别材料的新兴仿生技术，该技术在近几年已得到了迅速的发展，并在许多领域被广泛关注。作者综述了分子印迹技术原理、制备方法及其在食品痕量分析中的应用，最新的进展及其存在的问题等。     

Checking Finite Traces Using Alternating Automata

Alternating automata have been commonly used as a basis for static verification of reactive systems. In this paper we show how alternating automata can be used in runtime verification. We present three algorithms to check at runtime whether a reactive program satisfies a temporal specification, expressed by a linear-time temporal logic formula. The three methods start from the same alternating automaton but traverse the automaton in different ways: depth-first, breadth-first, and backwards, respectively. We then show how an extension of these algorithms, that collects statistical data while verifying the execution trace, can be used for a more detailed analysis of the runtime behavior. All three methods have been implemented and experimental results are presented.     

碱锰电池用锌粉中痕量铜的测定

提出了一种快速测定碱锰电池用锌粉中痕量铅的方法。铜在3.12×10-4mol/L乙基黄原酸钾-1.72×10-3mol/L丁二酮肟-0.6mol/L氨水-0.2mol/L氯化铵体系中,有一个灵敏的极谱波,峰电位在-0.70V附近。这样就可不经任何分离手续,利用示波极谱法测定锌粉中10-6～10-4范围内的铜。该方法灵敏度高,简单快速。     

Simultaneous determination of seven impurities in high-purity cobalt oxide by ICP-AES after matrix separation using 1-nitroso-2-naphthol as a precipitant

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｓｔａｎｄａｒｄｃｈｅｍｉｃａｌｍｅｔｈｏｄｓｆｏｒｔｈｅｄｅｔｅｒ ｍｉｎａｔｉｏｎｏｆｓｅｖｅｎｉｍｐｕｒｉｔｉｅｓｉｎｃｏｂａｌｔｏｘｉｄｅｉｎ ｃｌｕｄｅｔｗｏｄｉｆｆｅｒｅｎｔｍｅｔｈｏｄｓ (ＡＡＳｆｏｒＣａ ,ＡＥＳｆｏｒＺｎ ,Ｎｉ,Ｆｅ ,Ｃｕ ,ＭｎａｎｄＰｂ) [1] .Ｏｎｌｙａｆｅｗｓｔｕｄｉｅｓｈａｖｅｂｅｅｎｒｅｐｏｒｔｅｄｆｏｒｔｈｅｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｉｍｐｕｒｉｔｉｅｓｉｎｈｉｇｈ ｐｕｒｉｔｙｃｏｂａｌｔｏｘｉｄｅ .Ｋｕｊｉｒａｉａｎｄ…     

图象处理中边缘检测技术的研究

边缘检测是计算机视觉和图象处理中基础而又重要的课题。综述了目前边缘检测技术和边界跟踪技术 ,归纳了各种边缘检测方法和边界跟踪算法 ,以实际图象为例比较了这些方法。     

废水生物处理技术的研究动向

围绕生物难降解有机物处理及微量化学物质生物高度净化，介绍了国内外关于极端微生物的培养和利用、硝酸盐还原茵和硫酸盐还原茵的功能开发、废水处理微生物生态的研究、酶处理技术、碳源循环单级生物脱氮技术、微量化学物质生物高度净化技术等废水处理新技术。     

微量锌的光度法分析

由于光度法在分析化学中应用较为广泛，因此本文就近几年国内有关光度法测定微量锌的方法做了总结，为分析工作者提供了一个分析依据。分析方法大概分以下六类：(1)2-吡啶偶氮类显色剂；(2)酸性三甲烷染料类显色剂；(3)硫氰酸盐-三苯甲烷碱类染料类显色剂；(4)甲臜类显色剂；(5)卟啉类显色剂；(6)1，10-二氮杂菲-酸性染料类显色剂。     

微量Ag，Mg对Al-Cu-Li合金时效特性和显微组织的影响

研究了微量Ag，Mg对Al—Cu—Li合金显微组织和时效特性的影响。结果表明：单独加Ag对Al—Cu—Li系2197合金的固溶强化效果很小，但有较强的时效强化作用，Ag含量不同，时效强化效果也不同；Ag，Mg共同加入提高了Tl相（Al2CuLi）的析出速率和析出密度，使合金具有较大的固溶强化效果及最强烈的时效响应和时效强化效果。Ag，Mg的添加对合金的不同影响可通过溶质原子与空位、溶质原子与溶质原子之间的相互作用来解释。     

溴化碲分光光度法测定钛铝合金中微量碲

溴化碲分光光度法应用于钛铝合金中微量碲的测定，取得了良好的效果。干扰试验表明，在所选定条件下，Ｚｎ，Ｍｎ，Ｍｇ，Ｐｂ，Ｍｏ，Ａｓ，Ｙ，Ｓｎ，Ｎｂ，Ｓｂ，Ｐ，Ｃｏ，Ｎｉ，Ｃａ，Ｓｉ，Ｃｄ，Ｂｉ，Ｃｅ，Ｚｒ，Ｗ，Ｖ各１ｍｇ，Ｃｕ，Ｃｒ各０．１ｍｇＦｅ为０．２ｍｇ，对１００μｇＴｅ的测定基本无干扰，ＴｉＡｌ基体的轻微干扰可以用同量的ＴｉＡｌ作参比而消除。分别对含Ｔｅ０．１００％和０．０２０％的两组合成试     

Effect of Cd and Sn Addition on the Microstructure and Mechanical Properties of Al-Si-Cu-Mg Cast Alloy

The present work has investigated the effect of trace elements Cd and Sn on the microstructure and mechanical properties of Al-Si-Cu-Mg cast alloy. With the increase of Cd addition the strength of alloy rises at first and then drops. The optimal amount of Cd and Sn addition for AI-Si-Cu-Mg alloy is about 0.27% and 0.1% respectively. Due to the formation of some coarse Cd-rich phases and pure Cd particles the mechanical properties of alloy decrease when Cd amount exceeds 0.27%. When more than 0.1% Sn added, some Sn atoms form low-melting eutectic compound at grain boundary, and then cause over-burning in alloy when solution treated, which may deteriorate properties of alloy, especially ductility of alloy.On the other hand, the addition of Cd and Sn remarkably increases the peak hardness and reduces the time to reach aging peak in Al-Si-Cu-Mg alloy. The action of Cd/Sn in quaternary Al-Si-Cu-Mg alloy is effectively the same as that occur in binary Al-Cu alloy that the enhanced hardening associated with Cd/Sn addition is due to the promotion of the θ‘phase.