以亮绿为指示反应的催化光度法测定痕量锰

本文通过研究锰对KIO_4氧化亮绿的催化作用的适宜条件,建立了测定痕量Mn的分析方法,测定波长为460nm,符合比尔定律的范围是0.1～2.5ppb,检测限为3.8×10~(-11)g/ml,测定婴儿食品中锰含量得到满意结果。     

软锰矿直接还原浸取制备硫酸锰的研究

研究了用软锰矿与硫铁矿，硫酸直接浸取制备硫酸锰的新方法，并对该垢反应原理，原料配方，工艺流程作了介绍，新工艺具有能源消耗少，生产成本低，锰的回收率高等优点。     

热动力学研究的线性拟合法(Ⅰ)——简单级数化学反应

在热动力学理论的基础上，导出了简单级数反应的线性拟合法．应用这种方法研究了乙酸乙酯在纯水中、丙酸乙酯在“７０％”乙醇－水混合溶剂中、丁酸乙酯在“８５％”乙醇－水混合溶剂中皂化反应的热动力学．实验测得的速率常数与文献值相符合．     

Hormonal control of manganese transport in the mouse thyroid

The present study deals with a possible mechanism controlling the transport of manganese (Mn), an essential trace element, from the circulation to the thyroid. Mice were pretreated with propylthiouracil (PTU) or triiodothyronine (T₃), and a measurement of the thyroid:serum concentration ratio (T/S) of radioactive manganese (⁵⁴Mn) was carried out. The T/S of⁵⁴Mn was greatly enhanced by PTU, but reduced by T₃. Several methods were used to demonstrate that the T/S of⁵⁴Mn depends upon the level of thyroid-stimulating hormone (TSH) in the serum. First, bovine TSH was injected into mice; an increase in the T/S resulted. Secondly, serum thyroxine and T₃ levels measured by radioimmunoassay (RIA) suggested that PTU produced an increase in serum TSH and T₃ a decrease. However, direct measurement of mouse TSH by RIA for rat TSH failed to produce proof of any changes in TSH level, owing to poor cross-reactivity. Taking all the information into account, it is concluded that Mn-transport into the thyroid is controlled by the thyroid state.     

近岸海水中痕量锰的催化动力学分光光度法测定

锰是生物所必需的一种痕量元素,它参与人体中精氨酸酶、丙酮酸化酶、RNA多聚酶的反应,促进人体发育,并具有抗癌作用。海水中的锰是一种营养要素,它的含量随海洋中生物的活动而发生很大的变化。 催化动力学分光光度法测定锰,是基于锰对H_2O_2或KIO_4等氧化剂参与的氧化还原     

钛锰二元合金的吸放氢性能

系统地研究了钛锰二元合金的吸、放氢量,压力组成等温线以及吸氢过程热力学函数(ΔHΔS)的变化。实验证实,对于不加均匀化退火和活化处理的二元钛锰合金,其综合吸放氢性能最佳的组成为TiMn_(1.15)-TiMn_(1.25)。     

Evaluation of charge storage ability of chrome doped Mn2O3 nanostructures derived by cathodic electrodeposition

A facile synthetic route has been proposed to prepare cauliflower-like nanostructures of Cr doped Mn2O3. The synthesis was carried out by constant current cathodic electrodeposition from Mn2+ nitrate solutions containing minor amounts of dichromate. It was found that the presence of Cr mediates the formation of cathodic MnO2 which then reacts with the excess Mn2+ species to form Mn2O3 nanostructures. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Differential Thermal Analysis (DTA) were used to characterize the nanostructures. The storage ability of the obtained nanostructures was investigated by cyclic voltammetry (CV) in 0.5 M Na2SO4 solution. The results indicated that the Cr doped manganese oxide material shows better performance than the non-doped one, and the charge capacity (SC) of doped manganese oxide (218 F/g) was higher than pure manganese oxide (208 F/g).     

几种因素对硫化锌精矿、软锰矿同时浸出的影响

研究了硫化锌精矿、软锰矿同时浸出Ｚｎ－ＭｎＯ２同时电解的新工艺，将两种产品的生产工艺巧妙 结合起来，克服了单独生产的一系列缺点。运用正交设计考察了Ｈ＾＋、ｔ、ｈ对锌、锰浸出率的影响，建立了相关的数学模型。     

污染矿区共同治理利益相关者利益偏好分析——以西南地区“锰三角”为例

曾经环境极度恶化的西南地区"锰三角"经过政府部门、锰矿企业、当地居民等利益相关者共同治理,已取得了显著成效.对西南地区"锰三角"共同治理利益相关者利益偏好分析,结果表明政府部门、锰矿企业、当地居民等利益相关者共同关注社会、经济和环境效益.建议政府部门、锰矿企业、当地居民等利益相关者共同治理,实现"锰三角"社会、经济和环境效益协调发展.     

软锰矿与硫精矿直接浸出制备硫酸锰及在电解锌工业上的应用

本文介绍使用软锰矿和硫精矿在酸性条件下常压直接浸出制取硫酸锰溶液来快速解决湿法炼锌厂贫锰问题的理论与实践。