氨氧化过程中铂回收用吸附材料的制备和性能

研究了利用具有蜂窝状结构的吸附材料表回收在氨氧化过程中流失的铂催化剂组份的方法,重点考察了吸附材料载体的组成和制备条件对载体性质的影响,工业试验表明,该吸附材料不仅具有较好的吸附性能,而且具有机械强度高,流体阻力小等特点。     

α1-Adrenergic stimulation of ketogenesis and fatty acid oxidation is associated with inhibition of lipogenesis in rat hepatocytes

Summary The effect of norepinephrine on fatty acid synthesis (³H₂O incorporation into fatty acids), on fatty acid oxidation to CO₂ and on ketogenesis was studied in isolated hepatocytes of fed rats. After incubation with norepinephrine (50 M), lipogenesis was lower (5.7±1.1 nmoles³H₂O incorporated into fatty acids/mg dry weight/30 min) than in controls (7.5±1.7; n=6, p<0.02). In contrast, (1-¹⁴C) palmitate conversion into total ketone bodies was increased to 10.9±1.8 nmoles/mg/30 min with norepinephrine, vs 8.5±1.6 in controls (p<0.05), and more (1-¹⁴C) palmitate was converted to¹⁴CO₂ with norepinephrine than in controls (1.48±0.10 nmoles/mg/30 min vs 1.06±0.11, p<0.05). The inhibitory effect of norepinephrine on lipogenesis was abolished by addition of the ₁-receptor blocker prazosin, but not by ₂ or -blockers. The results demonstrate that the ketogenic effect of norepinephrine is coupled with an inhibitory effect on lipogenesis which may be explained by diminished activity of acetyl-CoA carboxylase, diminished formation of malonyl-CoA and decreased activity of carnitine palmitoyl transferase I.     

龙眼核提取物提高小鼠抗氧化功能的研究

研究了龙眼核提取物提高小鼠的抗氧化功能.每日对每组10只小鼠连续灌服不同剂量龙眼核提取物(TAC,48、240、1 200 u/g),21 d后测定小鼠血清超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶GSH-Px活力和脂质过氧化物丙二醛(MDA)的含量,并与对照组进行比较.结果表明,龙眼核提取物可显著增强小鼠血清SOD、GSH-Px活性,降低MDA含量,从而提高了小鼠的抗氧化功能.     

氯离子对电解氧化处理难降解垃圾渗滤液的影响

以循环式准好氧垃圾渗滤液为主要研究对象,探讨了渗滤液中氯离子对有机物电解去除效果的影响.实验结果表明,在一定条件下,渗滤液中难降解有机物的电解去除率随氯离子浓度的增加而增大.氯离子初始浓度和渗滤液COD等工艺条件对氯离子的作用效果有一定的影响.氯离子初始浓度在较低的范围内时氯离子对COD的去除比电耗的影响作用较明显,当渗滤液中氯离子初始浓度大于12.5 g/L时,COD的去除比电耗随氯离子初始浓度的增加变化不大;在电解处理低COD渗滤液时氯离子初始浓度对有机物降解效果的影响作用更明显.     

The kinetic studies of direct methane oxidation to methanol in the plasma process

The research outlined here includes a study of methanol production from direct methane conversion by means of thermal and plasma method. The kinetic study, derived from thermal-based approach, was carried out to investigate thoroughly the possible intermediate species likely to be presented in the process. A set of plasma experiments was undertaken by using dielectric barrier discharge （DBD）, classified as non-thermal plasma, done at atmospheric pressure and room temperature. Plasma process yields more methanol than thermal process at the same methane conversion rates and methane to oxygen feed ratios. Oxidation reaction of thermal process resulted CO and CO2 as the most dominant products and the selectivity reached 19% and 68%, respectively. Moreover, more CO and less CO2 were produced in plasma process than in thermal process. The selectivity of CO and CO2 by plasma was 47% and 20%, respectively. Ethane （C2H6）was detected as the only higher hydrocarbon with a significant concentration. The concentration of ethane reached 9% of the total products in plasma process and 17% in thermal process. The maximum selectivity of methanol, the target material of this research, was 12% obtained by plasma method and less than 5% by thermal process. In some certain points, the kinetic model closely matched with the experimental results.     

钛合金表面阳极氧化技术制备羟基磷灰石研究述评

羟基磷灰石与钛合金的结合,可以克服羟基磷灰石自身的缺点。阳极氧化技术是目前研究的热点,它包括阳极氧化法与微弧氧化法两种,本文综合论述了利用阳极氧化技术在钛及钛合金表面制备羟基磷灰石的研究现状,系统分析了阳极氧化技术与其他常用制备羟基磷灰石技术的优点,并对影响因素进行了详细地叙述,进而提出了相应的设想和展望。     

厌氧氨氧化及其工艺的研究现状

厌氧氨氧化工艺是生物脱氮领域里不断发展起来的新工艺,具有自身的优势,有很好的发展前景。通过介绍厌氧氨氧化的发展,进而谈到对厌氧氨氧化菌的研究。重点介绍了目前已开发出的三种厌氧氨氧化工艺:两相SHARON-ANAMMOX工艺、OLAND工艺、CANON工艺。     

Ru,CeO2,MnO2/TiO2新型CWO催化剂的研制

 制备了载体为TiO₂,活性组分为Ru(w=0.5%)和Ce,Mn的氧化物的催化湿式氧化法催化剂.制备中运用了Ce,Mn硝酸盐对载体的浸渍法预处理和表面纳米化技术的组合.研究了对模拟废水的催化湿式氧化分解的催化活性,COD去除率近70%,NH₃-N去除率87.9%.     

硝酸铈铵—溴酸钠对肟的选择性氧化研究

在水溶液中,用硝酸铵－溴酸钠串联氧化体系对肟进行选择性氧化生成相应的醛酮。     

碳载铂电极在甲酸氧化中的电催化特性

通过对碳载铂电极在甲酸氧化中电催化特性的研究,证明在玻碳表面镀铂黑制备高活性、低成本、新型实用型电催化剂的方法是成功的．研究结果表明,甲酸在碳载铂电极上电催化氧化是按双途径机理进行的．