二(十二烷基苯磺酰胺喹啉)合铜(Ⅱ)的制备及表征

用自行制备的磺酰氯与8-氨基喹啉反应，得到十二烷基苯磺酰胺喹啉，并制得了二（十二烷基苯磺酰胺喹啉）合铜（Ⅱ）配合物。配合物用红外、^1H NMR和元素分析进行表征。     

PEI与Cr（Ⅲ）螯合物结构的测定及其分析应用

使用分光光度法与电导滴定法研究了聚乙烯亚胺（PED与Cr^3＋的配合过程，测定了二者形成的螯合物结构。Cr^3＋与水溶性聚胺PEI可以定量地形成六配位螯合物，而且配合过程速度很快，螯合物稳定；在用PEI水溶液滴定Cr^3＋过程中，体系的电导率快速下降，在滴定终点电导率发生了清晰的转变。建立了测定Cr^3＋含量的一种新方法-PEI螯合作用电导滴定法，考察了各种因素对分析方法的影响，优化了分析条件。     

H2O2稳定剂的研究进展

概述了H2O2漂白稳定剂的稳定机理，详尽地归纳了近20年来所报道的稳定剂类型，分为以吸附屏蔽为主，结合或螯合为主，吸附与络合相结合、多成分复配及其他。     

螯合分散剂在亚麻粗纱煮练中的作用

亚麻织物以其优良的服装性能，深受广大消费者青睐．但传统的煮练工艺对亚麻纱的强力损伤大，纱线柔软性差．本文首先在理论上分析研究了传统煮练工艺对亚麻纱强力损伤的机理及用柔软剂和螯合分散剂保护纱线强力的机理．然后采用实验对比分析的方法，研究探讨了上述两种助剂的用量对亚麻纱性能的影响．实验结果表明，在亚麻粗纱煮练工艺中使用柔软剂和螯合分散剂，可以提高亚麻纱的柔软性和可纺性，进而使其强力得到提高，但若加入过多的柔软剂，反而使细纱平均强度下降，强度不匀情况恶化．     

镧系金属螯合物作为CEST磁共振造影剂的研究进展

化学交换饱和转移（CEST）成像是一种基于化学位移现象的新型磁共振成像（MRI）,通过检测水质子信号变化来间接测定可交换质子的信息,而镧系金属螯合物的顺磁化学位移大,质子共振位移更远离水的信号,可实现更多的选择性饱和,提高MRI的对比性,因此非常适合用作CEST造影剂.镧系金属螯合物CEST造影剂具有进一步扩展磁共振功能和分子成像的巨大潜力,文章主要介绍了此类物质的类型及应用.     

螯合-蒸馏法脱除异丙醇铝中痕量铁研究

异丙醇铝是醇盐水解工艺制备铝酸盐系发光材料和高纯超细氧化铝粉体的重要前驱物.铁是影响其使用性能的关键杂质.为了证实是否可以通过在制备异丙醇铝过程中加入一种螯合剂,使其与铝中的铁杂质反应生成高沸点化合物,通过减压蒸馏将其除去来制备无铁异丙醇铝,研究了螯合剂种类和加入量对除铁效果的影响.实验结果表明:一种含N/O功能基的螯合剂ON 1具有强的除铁功能,在m(ON 1)∶m(A l)为1∶160时,馏出物中有80%馏分的铁质量分数低于10×1-0 6,能够满足长余辉发光材料的制备要求.     

新型螯合型改性红薯淀粉对Pb(II)的吸附研究

红薯淀粉(SSt)与马来酸(MA)在吡啶的催化下,发生酯化反应,合成了对Pb(Ⅱ)具有高效率吸附性能的新型改性淀粉螯合吸附剂。通过探究反应物配比、合成温度(T1),确定了其最佳制备条件:m(SSt)∶m(MA)=5∶3,T1≥70℃。考察了吸附时间、模拟废液p H、Pb(Ⅱ)浓度、吸附温度对吸附量的影响。吸附过程符合二级动力学模型假设,线性回归方程为:y=0.033 4x+0.406 1,R2=0.989 4,k=6.764×10-3g/(mmg·h),Qe(理论平衡吸附量)=29.94 mg/g、Qe(实验平衡吸附量)=26.14 mg/g。     

Discussion on the mechanism of the calcium absorption in the human body

The present article discusses a new mechanism of calcium absorption in the human body. The mechanism is revealed as follows. First, after food is digested in the stomach, calcium ions (Ca2+) are released. The small intestine secretes amino acid or short peptide chain with small molecular weight automatically, which are called chelating agent; when the calcium ions from the stomach get to the small intestine, the reaction of the chelating agent with the calcium ions occurs, producing the neutral amino acid calcium chelate. Then, this kind of calcium chelate with small molecular weight is absorbed as a whole into the tissues of the small intestine. After being absorbed, in the cell the calcium chelate can break down its chelating bond automatically and decompose into the amino acid and calcium ion again. Finally, the calcium ion goes into blood through portal vein and is transferred to the organs and also deposits on the bone. The reason for the body抯 calcium insufficiency, which has no linear relation with the calcium intake amount, is the lack of the amino acid secreted by the small intestine. The main barrier that influences the calcium absorption is anion pollution. The calcium absorptivity of the body has nothing to do with the solubility of the calcium source out of the body. A new kind of calcium supplement agent——glycine calcium chelate——is synthesized, whose molecular weight is 206.06 (containing a molecular water). If the glycine calcium chelate is used to make calcium supplement agent, about 20 mg calcium element (converted from the glycine calcium chelate, the same below, no longer indicated) per day for one person, 50 mg at most, is enough to maintain the positive balance of calcium metabolism.     

2-[2-(5-甲基-1,3,4-噻二唑)偶氮]-5-二甲基氨基苯酚及其镍螯合物的合成与性质研究

以 2-氨基-5-甲基-1, 3, 4-噻二唑, 3-N,N-二甲基氨基苯酚,四水合乙酸镍为主要原料合成了未见文献报导的 2-[2-(5-甲基-1, 3, 4-噻二唑)偶氮] -5-二甲基氨基苯酚及其镍螯合物。并采用元素分析、质谱、核磁、ICP发射光谱及红外光谱等对目标产物进行了表征,同时研究了它们的电子吸收光谱性质和热学性质。     

Cadmium-induced changes in avian renal morphology

Summary The effects of i.m. administered cadmium on growth rate and nephromorphology were studied in young pullets. The growth rate of pullets treated with 0.6 mg Cd²⁺/kg at 48-h intervals was severely retarded, reaching only 50% of normal growth by 21 days. Such a decrease in growth rate was prevented when cadmium was given with either ferric or magnesium EDTA chelate. Electron micrographs of kidney tissue from cadmium intoxicated birds revealed massive intracellular disorganisation of proximal tubular cells, showing increased vacuolation and dilated endoplasmic reticulum. Mitochondria were few and swollen with reduced cristae. Some disorganisation was noted in the group treated with MgEDTA in conjunction with cadmium, with normal morphology observed in the group treated FeEDTA plus cadmium.In general, glomerular morphology of intoxicated pullets appeared normal, except that a 25% increase in thickness of the glomerular basement membrane was evident. No such membrane thickening was observed in any of the chelate treated groups.These findings indicate that both chelates can provide certain levels of protection, in terms of growth rate and morphology, from cadmium intoxication. The possible mechanisms by which chelates offer protection have been discussed, but many questions remain unanswered.