六偏磷酸钠对加碘食盐固结及碘剂稳定性的影响

食盐加碘是预防碘缺乏病最经济有效的措施,我国每年生产和销售的800多万吨食盐全部为加碘盐。而加碘盐易固结,所加KIO3不稳定,容易损失。六偏磷酸钠是优良的食品添加剂,应用于肉制品、面制品等食品中。本文研究六偏磷酸钠对加碘食盐固结及碘剂稳定性的影响。     

有机盐制备的Fe3O4-葡聚糖纳米粒子的磁性能及表征

By means of chemical co-deposition method in which added Ferric citrate and Ferrous Gluconate, Fe3O4-Dextran composite nano-particles having average diameter 26 nm, was obtained. The particles had a core of diameter 4.1 nm Fe3O4 with a shell of thickness 11 nm Dextran. In the experiment the critical structure of Fe3O4 inorganic particles abstained without N2 protection had no changes. From the result, it can be proven that organic salt has anti oxidation properties and the composite particles have superparamagnetic whose good magnetization is 52 emu/g at 300 K, and 63 emu/g at 5 K. The structure, pattern diameter and magnetic properties of the Fe3O4-Dextran composite particles were examined by means of TEM, XRD, DLS and VSM.     

漫谈食盐与工业盐

本文针对人们普遍关注的工业盐中毒问题,对食盐与含有亚硝酸钠的工业盐进行了比较,介绍了工业盐对人体健康的危害、工业盐中毒的原因及预防措施,探讨了区别食盐与工业盐的方法。     

季铵盐参与的直接化学选择性O-和N-烷基化反应

将羧酸或胺类化合物与季铵盐进行简单的混合加热,便可直接得到O-或N-烷基化产物。季铵盐中烷基的转移具有较好的选择性,其优先顺序为：苄基〉伯烷基〉仲烷基。     

镨甘氨酸高氯酸盐的低温热容和标准生成焓的测定

The rare-earth perchlorate complex compound with DL-α-Glycin was synthesized. Its structure was characterized as Pr2(DL-α-Gly)6(H2O)4(ClO4)6·5H2O by TG, DTA and chemical analysis, and the purity was 99.63 %. The melting point analysis experiment indicates that the complex has no stable melting point. The heat capacity of the complex was measured by a high-precise fully-automated adiabatic calorimeter from 79 to 371 K. No obvious abnormal heat capacity was observed within this low temperature range. The thermal decomposition temperature range of the complex was near 333 K. Its decomposition temperature, decomposition enthalpy and entropy were 320.010 K, 40.714 kJ/mol and 127.227 J/molK, respectively. The polynomial equation of heat capacity of this compound was simulated by the computer within the temperature range of 78.939~301.295 K. The standard enthalpy of formation was -8022.802 kJ/mol measured by isoperable reaction calorimeter at 298.15 K.     

烯基取代的甲酸态四氢叶酸辅酶模型的合成及其碳单元转移反应

以邻苯二胺和乙酸为原料,经3步反应合成了8种烃基乙烯基取代的苯并咪唑盐,其结构用元素分析,¹HNMR,IR,MS和UV-Vis进行了表征,并以其作为取代的甲酸态四氢叶酸辅酶模型,同亲核试剂(格氏试剂)反应得到烃基乙烯基取代的一碳单元完全转移的产物α,β-不饱和酮,为α,β-不饱和酮的合成提供了一种简便的仿生合成新方法.     

利用Grignard试剂的甲酰化反应合成对甲氧基苯甲醚

二取代苯并咪唑盐;利用Grignard试剂的甲酰化反应合成对甲氧基苯甲醚     

Syntheses and Application of All-lithium Salts of Heteropolyacid as Electrolyte of Lithium-ion Battery

IntroductionThesecondarylithium ionbatterieshaverecentlybecomeoneofthechemicalenergysourceswhichhavebeenresearchedanddevelopedintheworldbecauseoftheirbiggerspecificcapacity ,lighterweight ,higheroperatingvoltage ,longercycliclifeandbettersecuri ty[1— 3] .LiClO4 ,LiAsF6 andLiPF6 aremainlyusedaselectrolytesinthecommercializedlithium ioncellsintheworldinspiteoftheirdisadvantages:LiClO4 isalittleunsafewhichwillbedetonablewhenbeingbumpedandishygroscopic ;LiAsF6 ispoisonousanditisanenvironment…     

阳离子光引发剂芳茂铁六氟磷酸盐的制备

以二茂铁为原料制备了3种阳离子光引发剂芳茂铁六氟磷酸盐.考察了反应温度、反应时间和催化剂用量等因素对反应的影响.对产物进行了IR和UV光谱分析.     

铈对锂铝合金阳极充放电性能的影响

研究了铈对锂铝合金阳极充放电性能的影响。在锂铝合金阳极中添加 0 5%～ 1 5% (质量分数 )铈 ,可增大电池的放电容量和电压 ,改善锂铝合金阳极的表面形貌。添加铈的多孔锂铝合金阳极具有理想的充放电性能。