油漆工头发中铁、锌、铜水平的研究

对８２名苯作业工人和１００名对照组工人的发铁、发锌和发铜含量水平进行了研究。结果揭示，油漆作业工人发铁含量为１０．３×１０－６±２．３×１０－６，明显低于对照组（１４．４×１０－６±３．１×１０－６）．Ｐ＜０．０１，发铜含量为７．４×１０－６±１．２×１０－６，亦低于对照组（９．８×１０－６±１．３×１０－６）．Ｐ＜０．０５；发锌含量为１６９．２×１０－６±２６×１０－６，与对照组（１７２．５×１０－６±２８×１０－６）基本相同，Ｐ＞０．０５．     

佝偻病患儿发中微量元素观察

对４８例佝偻病患儿发中锌、铅、铜３种元素用ＩＣＰ－ＡＥＳ法测定，同时采患儿指端血用超微量分析仪测定血钙、磷、碱性磷酸酶（ＡＫＰ），与正常组对比，以探讨佝偻病与微量元素的关系．结果表明：佝偻病患儿发锌、血钙、血磷低于对照组，发锌１００．３６×１０－６±５１．８８×１０－６，１６７．７６×１０－６±１１３．５２×１０－６，Ｐ＜０．０１；血钙４．７７±０．８６ｍｇ／ｄＬ，５．２９±０．５７ｍｇ／ｄＬ，Ｐ＜０．０５；血磷８．２１±１．０６ｍｇ／ｄＬ，９．４５±１．４４ｍｇ／ｄＬ，Ｐ＜０．０１，发铅、铜／锌比值及ＡＫＰ高于对照组，分别为发铅４６．７×１０－６±２６．７×１０－６，２６．７９×１０－６±１１．６×１０－６，Ｐ＜０．０１；铜／锌０．２５８９±０．１８７，０．１４４２±０．１０６，Ｐ＜０．０５；ＡＫＰ３６．４３±２４．６５ｕ，２５．１８±５．７９ｕ，Ｐ＜０．０５。提示婴幼儿体内锌含量不足及铅过高是引起佝偻病的原因之一。在防治佝偻病时，应补充微量元素锌．     

厌食与反复呼吸道感染小儿的发锌.铜分析

测定了７５例厌食小儿、１０１例呼吸道感染小儿和１２０例健康儿童发锌、铜，结果表明：厌食儿及易感儿平均发锌值分别为８０．９０×１０－６和７５．７６×１０－６，均极显著低于健康儿（Ｐ＜０．０１）；发铜则无显著差异。发锌值在７０×１０－６以下者有６０％以上身高、体重低于正常标准。说明微量元素锌与小儿食欲、免疫功能和生长发育有密切关系。     

妊娠晚期羊水中微量元素测定及其与胎儿生长发育关系的研究

对１０２名足月正常妊娠第一胎的产妇妊娠晚期羊水中６种微量元素（锌、铜、锰、铁、钙、镁）首次进行了测定，并通过对出生新生儿生长发育的监测探讨其与胎儿生长发育的关系。妊娠晚期羊水中６种微量元素含量（±Ｓ／×１０－５）分别为：Ｚｎ２．２９±１．７７，Ｃｕ０．１４±０．１４，Ｍｎ０．１３±０．２３，Ｆｅ３．６９±２．７０，Ｃａ８２．５４±７４．１８，Ｍｇ１８．７１±１１．０９．男女新生儿其母羊水中微量元素含量比较无显著差异，Ｐ≥０．０５．与文献报道中期妊娠羊水中所含微量元素比较有增加趋势．６种微量元素相互关系中．与锌、钙呈正相关外，锌与铜、锰、铁、镁呈负相关．低体重组与低身长组新生儿孕母羊水中锌含量明显低于高体重组和高身长组，有显著差异，Ｐ≤０．０１．铁在高身长组含量增高，与低身长组比较有显著差异，Ｐ≤０．０５．锰于低体重组含量升高，与高体重组比较有显著差异，Ｐ≤０．０１．镁与铜于低身长组含量升高，与高身长组比较有显著差异，Ｐ分别≤０．０５与０．０１．可见高铜、高锰、高镁可致胎儿生长发育迟缓．     

妊娠糖尿病与非妊娠糖尿病患者头发微量元素含量分析

采用高频等离子体发射光谱法测定了妊娠糖尿病患者、非妊娠糖尿病患者以及相应对照组的头发微量元素锌、铁、铜、锰、锶、镁和常量元素钙的含量。56例健康妊娠妇女的发锌含量为（139．9±31.5）×10－6，而11例妊娠糖尿病妇女为（114．3±29．4）×10－6，两者比较差异有显著性，（P＜0．05），其它元素铁、铜、锰、锶、镁和钙不存在显著性差异。而45例非妊娠糖尿病女性与33名健康非妊娠女性的头发微量元素含量比较表明：两者锌含量不存在显著性差异，但糖尿病组铜显著低于健康对照组（P＜0．05），分别为（6．32±2．31）×10－6和（9．05±16．50）×10－6，糖尿病组铁含量（21．5±11．7）×10－6亦显著低于健康对照组（26．9±10．7）×10－6，其余元素无显著性差异。前后两组实验结果表明妊娠糖尿病患者与非妊娠糖尿病患者的微量元素代谢状况并不相同，妊娠糖尿病患者的锌缺乏状态值得引起注意。     

正常与不育男性精浆锌和铜的研究

测定了正常男性３３例与不育男性１４４例糖浆微量元素锌和铜的含量（μｇ／ｍＬ）：正常组锌２０２．５９±５２．９，铜０．２５±０．０１９，不育组锌１１７±５７．５，铜０．４８±０．３８．所得结果表明：不育组精浆锌明显低于正常组，差别有极显著意义．不育组精浆铜明显高于正常组，差别有显著意义．     

云南名香烟等嗜好物品含氟量的研究

本文报道了（１）十二种云南高档和普通香烟含氟量为５．４４３４×１０－６～８．５８４×１０－６，平均７．２２３±０．９９４０×１０－６，湖南笑梅、Ｍｏｒｅ香烟含氟显为１２．５４２×１０－６和６．１４８×１０－６；（２）用高氟玉米和小麦酿造的６０°和５０°白酒，含氟量分别为０．０７４±０．００４ｍｇ／Ｌ和０．０７６±０．００６ｍｇ／Ｌ；（３）西双版纳和广东大丰咖啡及雀巢咖啡含氟量范围１．６７２×１０－６～４．４４６×１０－６，平均３．１１０×１０－６±１．３０６×１０－６；（４）昆明市售花茶、红茶、绿茶、砖茶共３０份，含氟量分别为７５．５×１０－６±７．０７×１０－６、１０．４．１３×１０－６±６０．６６×１０－６、６２．２×１０－６±４８．０８×１０－６和３０５．５×１０－６。上述四种嗜好物品除茶叶含氟量高，饮茶过量会引起氟中毒外，其余三种与氟中毒关系不大．     

极谱法快速同时测定锌电解液中微量铜、镉、钴

铜、镉、钻在了丁二酮肟－氯化铵－柠檬酸钠－ＨＡｃ－ＮａＡｃ体系中有灵敏的极谱波。其峰电位分别为－０．２４Ｖ、－ ０．７９Ｖ和－０．９３Ｖ,线性范围分别为４ × １０~（－６）～ ４ × １０~（－３）、５ × １０~（－６）～ ５×１０~（－３）、１×１０~（－７）～１×１０~（－４）ｇ／Ｌ,检测限分别为２×１０~（－６）、４ × １０~（－６）和５×１０~（－８）ｇ／Ｌ。方法无需预处理直接用于锌电解液中微量铜、镉、钴的测定,结果令人满意。     

铜（Ⅱ）锌（Ⅱ）—氟哌酸体系电化学行为及示波极谱法研究

铜（Ⅱ）和锌（Ⅱ）分别在０．１ｍｏｌ／ＬＫＨ２ＰＯ４－Ｎａ２ＨＰＯ４缓冲溶液（ｐＨ６．５）和０．２５ｍｏｌ／ＬＮＨ４Ｃｌ溶液中，与氟哌酸形成良好的络合吸附波，峰电位分别为－０．２６Ｖ和－１．２８Ｖ（ｖｓ．ＳＣＥ），络合比分别为１：３和１：２，峰电流与铜（Ⅱ）和锌（Ⅱ）的浓度均在４．０×１０＾－７～５．０×１０＾－６ｎｏｌ／Ｌ范围内呈线性关系，检测限分别为７．０×１０＾－８和５．０×１０＾－８ｍｏｌ     

儿童发锌含量差异对血红蛋白及铜代谢的影响

分析测定了３４６名儿童的发锌（Ｚｎ）、发铜（Ｃｕ）含量，从中抽出发锌含量大于１００×１０－６和小于６０×１０－６的两组儿童进行比较，发现高锌儿童的血红蛋白（Ｈｂ）含量显著高于低锌儿童；身高、体重等代表体格发育的指标明显不同，高锌组儿童发育明显优于低锌组．说明发锌含量高低直接影响到儿童造血功能及发育水平．另外高锌组的发铜含量比低锌组低，两组μｕ／Ｚｎ比值有显著性差异，锌的高含量对铜的代谢有一定影响，锌对铜具有拮抗作用．     

多环芳二酐型聚酯亚胺膜的透气性能

多环芳二酐型聚酯亚胺膜的透气性能李悦生，丁孟贤，徐纪平（浙江大学高分子科学与工程研究所，杭州，３１００２７）（中国科学院长春应用化学研究所）关键词聚醚酰亚胺，聚酯酰亚胺，膜，透气性通常的聚酰亚胺加工性能较差，在芳环二酐的苯环间引入醚键等柔性基团后，其...     

Determination and study on residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil

A QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for the determination of benazolin-ethyl and quizalofop-p-ethyl in rape and soil by high-performance liquid chromatography-tandem mass spectrometry has been developed in this study. The residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil were determined with the developed method. The half-lives of benazolin-ethyl in rape straw and soil were 3.7–5.1 days and 14.3–26.3 days, respectively. The half-lives of quizalofop-p-ethyl in rape straw and soil were 5.0-6.1 days and 0.3–9.7 days, respectively. The residue of benazolin-ethyl and quizalofop-p-ethyl in rapeseed and soil were below the detection limit (i.e., 0.5?mg?kg^?1, the maximum residue level of European Union for quizalofop-p-ethyl).     

微量元素与疾病诊断治疗的研究现状及展望

对国内外微量元素与疾病的关系及其诊断治疗的研究现状及研究动向进行了综述，包括：微量元素与地方病、癌肿、心血管病、糖尿病、眼病、神经系统病等。参考文献72篇。     

Conformations and steric and stacking interactions of trisubstituted ureas and thioureas with alkyl and phenyl groups

The monomeric ν(N—H) vibrations of various trisubstituted ureas of the R₂UPh type and -thioureas of the R₂TUPh type have been studied. The trans—out isomerism in the former and the trans—out—cis isomerism in the latter are discussed from the point of view of steric effect. The monomeric ν(N—H) vibrations of RPhUPh and RPhTUPh are also examined. The single band appearing in the spectrum of both ureas is characteristic of the cis form; this suggests the existence of phenyl—phenyl interaction (the stacking interaction proposed by Galabov et al. [10]). Behavior of ν(N—H) vibrations at several concentrations is shown to be clearly different in the three forms (trans, out and cis). The presence of the cis form is confirmed by solvent effect experiments.     

Ti-V基储氢合金及其氢化物的物相结构与组分优化设计

Ti-V基储氢合金在室温、常压下即可表现出良好的储氢特性,且质量储氢容量明显高于传统AB₅型储氢合金,从而在氢气的精制和回收、运输和储存及热泵等方面有较早的应用。 此外,在混合气体分离、核反应堆中处理氢的同位素、镍氢电池及燃料电池负极材料等方面也得到了广泛的研究与关注。 基于目前Ti-V基储氢合金的研究现状,概述了该类合金的优势、限制性因素(包括成因)及改性手段。 此外,为了进一步理解Ti-V基合金储氢机理、构建合金组分与储氢特性之间的对应关系,本工作重点围绕Ti-V基储氢合金及其氢化物的结构、组分优化设计展开综述,并对其未来研究方向做出展望。     

钒与糖代谢及糖尿病

微量元素钒作为生物体内必需元素，经证实有很重要的生理学功能，与机体糖代谢有十分密切的关系，且能降低糖尿病动物模型的高血糖，极有可能被开发为治疗糖尿病的药物。     

Ferrocene and ferrocenium modified clays and their styrene and EVA composites

In this work, ferrocene- and ferrocenium-containing salts were employed to modify montmorillonite. X-ray measurements show an increase in the interlayer spacing upon clay modification, which means that the larger and more organophilic cations were inserted into the gallery space of montmorillonite. Attempts to prepare nanocomposites of polystyrene and ethylene vinyl acetate copolymers lead to immiscible systems; the morphology of these systems was elucidated with TEM, XRD and cone calorimetry. The thermal stability of the composites is greater than that of the virgin polymer.     

Synthesis and Optical and Redox Properties of Symmetric and Asymmetric BODIPYs

Herein, we present the synthetic route and the photophysical, electrochemical as well as laser properties of novel red‐emitting boron‐dipyrromethenes (BODIPYs) bearing arylethyne moieties. Such functionality is added along the main axis of the chromophore leading to single‐ and double‐substituted derivatives. The relationship between the dye structure and the lasing properties is studied in detail with the help of the photophysical and electrochemical properties as well as quantum mechanical simulations. The asymmetric substitution of the parent dye induces inhomogeneities in the charge distribution, which leads to an overall loss of the fluorescence capacity, mainly in polar media. Such non‐radiative deactivation processes can be softened by decreasing the electron‐donor ability of the substituent or even avoided by symmetrical substitution. Thus, grafting of the arylethyne moieties at the longitudinal axis of the indacene core results in an effective strategy to develop red‐edge BODIPYs with highly efficient and photostable laser emission.     

Synthesis of Tyrosol and Hydroxytyrosol Glycofuranosides and Their Biochemical and Biological Activities in Cell-Free and Cellular Assays

Tyrosol (T) and hydroxytyrosol (HOT) and their glycosides are promising candidates for applications in functional food products or in complementary therapy. A series of phenylethanoid glycofuranosides (PEGFs) were synthesized to compare some of their biochemical and biological activities with T and HOT. The optimization of glycosylation promoted by environmentally benign basic zinc carbonate was performed to prepare HOT α-L-arabino-, β-D-apio-, and β-D-ribofuranosides. T and HOT β-D-fructofuranosides, prepared by enzymatic transfructosylation of T and HOT, were also included in the comparative study. The antioxidant capacity and DNA-protective potential of T, HOT, and PEGFs on plasmid DNA were determined using cell-free assays. The DNA-damaging potential of the studied compounds for human hepatoma HepG2 cells and their DNA-protective potential on HepG2 cells against hydrogen peroxide were evaluated using the comet assay. Experiments revealed a spectrum of different activities of the studied compounds. HOT and HOT β-D-fructofuranoside appear to be the best-performing scavengers and protectants of plasmid DNA and HepG2 cells. T and T β-D-fructofuranoside display almost zero or low scavenging/antioxidant activity and protective effects on plasmid DNA or HepG2 cells. The results imply that especially HOT β-D-fructofuranoside and β-D-apiofuranoside could be considered as prospective molecules for the subsequent design of supplements with potential in food and health protection.