含砷烟灰脱砷现状

介绍了有色工业中含砷烟灰的主要来源及形态,综述了脱砷的两类方法——焙烧脱砷和浸出脱砷的研究现状,对比了两类方法的优缺点,得出浸出脱砷有工作环境好、适用范围广、能耗较低和技术手段丰富等优点,可实现含砷烟灰的变废为宝和综合利用。并指出含砷烟灰安全处置及综合利用的意义,以期对含砷废料的综合利用研究有所帮助。     

含砷铁矿石脱砷研究现状

进行含砷铁矿石脱砷研究对于有效开发利用我国贫矿、复合矿资源,降低钢材中砷质量分数有着重要意义。介绍了我国含砷铁矿资源的特点,综述了气化脱砷反应机理,铁矿石脱砷工艺以及温度、气氛、时间等因素对脱砷率的影响,展望了含砷铁矿石脱砷今后的研究方向及发展趋势。     

硫化法从砷滤饼中分离砷的试验研究

采用“硫化钠浸出砷-硫酸沉淀砷”工艺处理含砷滤饼,采用单因素试验考察了各因素对硫化钠浸出砷及硫酸沉淀砷的影响,确定了最优化工艺条件。在最优条件下,砷分离效果较好。     

闪速炼铜过程砷综合治理方案探讨

文章介绍了贵溪冶炼厂闪速炼铜过程砷的分布及砷的回收现状，探讨了砷的综合治理方案。     

含砷物料脱砷技术研究与开发的现状和展望

介绍有色冶金中砷的主要走向及含量分布情况,综述了现阶段国内对含砷物料进行综合处理的四类主要方法——火法焙烧脱砷、湿法浸出脱砷、火法与湿法联合脱砷以及生物氧化预处理脱砷的研究现状,对比分析了四类主要方法的优缺点。湿法脱砷和生物氧化预处理脱砷相对于其他方法具有工艺简单、操作条件温和、节能环保等优点,在实际生产中得到了一定的应用。最后,指出了有色冶金中含砷物料脱砷研究的发展方向。     

有色冶炼含砷危废玻璃固化技术研究进展

介绍了砷资源的供需情况及有色冶炼含砷物料的走向及含量分布情况。综述了含砷危废无害化处置技术及工业应用情况,详细介绍了国内外含砷危废玻璃固化技术研究现状,指出玻璃固化技术是含砷危废处理的最佳技术,并从政策管理、标准制定、技术研发及污染治理等角度指明了砷玻璃固化技术的发展方向。     

有色冶金工业含砷物料的处理及利用现状

综述了当前有色冶金工业中产生的AsH3气体、含砷烟尘、含砷废水及含砷废渣的处理方法及综合利用现状,并指出当前砷产品的开发、应用及发展前景,为以后含砷物料的处理指明了方向。     

引进波立顿脱砷技术对天马山硫砷金精矿进行预处理

分析天马山硫砷金精矿原料组成及引进波立顿脱砷技术的必要性;研究了硫砷金精矿缺氧磁化焙烧脱砷机理;介绍了波立顿脱砷技术的应用情况及焙烧试验结果;论证了预处理工艺流程、处理规模、进料方式及焙烧方式等技术方案;阐述了预处理工艺选择的主导原则、技术引进的内涵及性能保证的指标;评价了两原料方案的经济效益。     

关于集中治理砷害的思考

文章针对江西铜业公司高砷铜精矿冶炼的特点,分析了砷源、砷的分配、砷的危害途径及对象,评述了Cashman法和小坂法处理闪速炉电收尘烟尘的工艺特点,提出了集中脱砷方案的观点和基本构思.     

含砷烟尘湿法提取白砷新工艺

进行了含砷烟尘湿法提取白砷的实验研究。介绍针时烟尘中砷存在形式的不同所采取的不同处理方法及结果：获得优质白砷，降低浸出渣含砷。     

论从实践理解世界的物质性和自然世界的先在性

马克思主义唯物论是一种物本主义形态的唯物论,还是一种超越物本主义形态、从实践理解世界的本质相关问题的实践的唯物主义的唯物论?这是一个我们必须搞清楚的有关马克思主义唯物论的本质规定性和精神实质的重大问题.在考察物本主义的唯物论及其思维方式的局限性的基础上,揭示了马克思主义唯物论是现代的、实践的唯物主义,并重点研讨了马克思主义唯物论关于从实践理解世界的物质性和自然世界的先在性的原理,以期为马克思主义唯物论进一步阐明人类世界的实践性原理奠定基础.     

Effect of cyproheptadine on the ultrastructure of the neurons of the arcuate nucleus in the hypothalamus of the rat

The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease.     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.