火焰光度法测定氧化铝中的氧化钠

氧化铝原料纯度高,熔点高,不被氢氟酸—硫酸所分解,但能迅速熔解于热的硫—磷混酸溶液中。控制溶液中硫—磷混酸的浓度,并在氧化钠系列标准溶液中配入等量的硫—磷混酸,即可在火焰光度计上直接测量氧化钠的含量。     

新型兽用消毒剂合成及应用研究

综述了兽用消毒剂发展情况以及几种新型兽用消毒剂的合成方法及应用,指出合理选择使用各种消毒剂是提高饲养质量的重要环节.     

P_2O_5影响Na_2O-B_2O_3-SiO_2系玻璃结构与性质的特殊性

本文通过不混溶温度的确定,分相玻璃沥滤速率的测定以及NMR定量分析,研究了P_2O_6对Na_2O-B_2O_3-SiO_2系统玻璃结构和沥滤性质的影响。结果表明,P_2O_5在很大程度上促进钠硼硅分相玻璃的沥滤并非压抑“硼反常”所致,而是由以下三种因素综合作用的结果:(1)P_2O_5促进了钠硼硅玻璃的分相,使连通富硅相骨架尺寸增大;(2)P_2O_5的加入使富硅相骨架间隙中沉积的SiO_2量减少,减小了可溶相扩散阻力;(3)P_2O_5也使可溶相的溶解速率加快。     

焦亚硫酸钠生产工艺的改进与提高

焦亚硫酸钠生产装置原设计采用φ(SO2)7.0-7.5%的低含量二氧化硫气体为原料，但在生产过程中出现了种种问题，后通过加入液体二氧化硫，将原料气φ（SO2），提高到9％－12％，并同时对装置的烘干系统和离心系统进行改进，提高了产品质量和生产效率，降低了成本，改善了操作环境。     

Sodium Coordination Environments in Silica Films

The local structure centered on sodium after diffusion in silica (Na-SiO₂ samples) has been determined by means of extended X-ray absorption fine structure (EXAFS) studies. The Na-SiO₂ samples are of particular interest because (i) their sodium content can be varied over a wide range of concentration and (ii) their local structure is representative of that of soda–silica glass. EXAFS analyses reveal the existence of a well-defined local structure involving oxygen, sodium, and silicon neighbors. The Na-O, Na-Na, and Na-Si bonds lengths, which amount to 0.23, 0.30, and 0.38 nm, respectively, do not depend on sodium concentration. This environment closely resembles that found in soda–silica glass. Moreover, it is compatible with the "target site" and "the site memory effect" suggested by recent theories of the ionic conductivity in oxide glasses.     

SMAS/AM/淀粉抗温接枝共聚物的研究

研究了甲基丙烯磺酸钠(SMAS)、丙烯酰胺(AM)与淀粉接枝共聚物的合成方法，接枝反应的影响因素和热稳定性。实验结果表明，该接枝反应基本符合自由基反应的一般规律，并且其聚合产物具有明显的抗高温能力。     

泡花碱在味精废水处理中的应用及其废渣的利用

叙述了泡花碱处理味精废水的作用原理及对处理废水后的废渣的利用。实验结果表明 :经泡花碱处理后的味精废水COD降低至 1× 10 4 mg/L以下 ,pH =7.0～ 8.0。     

Soy protein combined with copper and boron compounds for providing effective wood preservation

Chromated copper arsenate (CCA), an arsenicbased wood preservative, is toxic to human health and the environment. Although CCA is stable in seasoned wood, there are potential dangers during CCA manufacture, lumber treatment, and waste disposal. This research was conducted to study the effectiveness of soy products to replace toxic chromium and arsenic compounds in wood preservative formulations. Three soy product (Arpro 2100, HM 90, and Supro 760) were used as fixative agents in preservative solutions containing anhydrous CuSO₄ and Na₂B₄O₇·10H₂O. The decay resistance of treated wood blocks was measured by a soil-block culture method. Despite the large molecular sizes of copper-protein and copper-boron-protein complexes, southern pine sapwood was treatable with these preservative formulations. Wood samples treated with >6 kg°m⁻³ CuSO₄ and 7.5 kg·m⁻³ soy product, and subsequently leached for 3 d and exposed to the decay fungus Gloeophyllum trabeum (Fr.) Mur., sustained only 0.5% weight loss over 12 wk. Wood samples needed 40 kg·m⁻³ CuSO₄ and 50 kg·m⁻³ soy protein to resist the copper-tolerant decay fungus Postia placenta (Fr.) M. Lars. & Lomb. These results suggest that soy-based wood preservatives can prevent wood products from fungal attack and can replace CCA.     

准同型相界附近(Na1-xKx)0.5Bi0.5TiO3的制备及性能研究

利用固相法制备了（Na1-xKx）0.5Bi0.5TiO3系压电陶瓷，XRD分析表明所得陶瓷样品为纯的钙钛矿结构，其准同型相界在x=0．18～0．22之间；电子探针显微分析显示所做陶瓷样品晶粒发育良好，具有规则的外形和明显的晶界；实验所得陶瓷样品损耗tanδ最大不超过5％，最好的压电常数d33=153 pC／N，平面机电耦合系数kp=0．299，它们分别出现在x=0．22和0．20处。     

氯氧化锆生产中除钠工艺的研究

概述烧碱生产氯氧化锆工艺的传统方法，介绍新的除钠方法，该法比传统方法具有明显的优势。