低温等离子体联合光催化减少船舶柴油机模拟烟气中NOx排放的实验     

范丽  周小力  张丽  董耀华  董丽华 《上海海事大学学报》2018,39(2):73-80

为减少船舶柴油机模拟烟气中NO_x的排放,将低温等离子体技术与光催化技术联合。通过实验研究2种技术单独及联合使用时影响NO_x排放的因素和反应机理。结果表明:采用低温等离子体技术时NO的脱除率随放电电压的增大而提高,随气体流速、NO初始体积分数和O_2体积分数的增大而降低,该技术对高体积分数NO的脱除更有优势;采用光催化技术时NO的脱除率随紫外灯功率和O_2体积分数的增大而提高,随气体流速和NO初始体积分数的增大而降低,该技术更适合处理低体积分数、低流速气体。在流速1 L/min、O_2体积分数4%、放电电压14 kV、紫外灯功率15 W的工况下,采用联合处理技术时NO的脱除率达65%~75%,脱除效果优于单独使用低温等离子体技术和光催化技术的效果。  相似文献   

运动训练与脑内一氧化氮关系的研究进展     

马春伟  张河水  杨澎湃 《体育科技文献通报》2011,19(3):128-129

采用文献资料法,介绍了不同形式的运动训练对中枢神经系统中NO含量的影响,并综述了NO与运动训练的研究现状及该领域研究中存在的问题,以及NO在将来的研究方向,为改善运动员运动性中枢疲劳及全民健身提供一定的神经生物学依据。  相似文献   

Biochemistry of Nitric Oxide     

Habib S  Ali A 《Indian journal of clinical biochemistry : IJCB》2011,26(1):3-17

Nitric oxide (NO) a free radical having both cytoprotective as well as tumor promoting agent is formed from l-arginine by converting it to l-citrulline via nitric oxide synthase enzymes. The reaction product of nitric oxide with superoxide generates potent oxidizing agent, peroxynitrite which is the main mediator of tissue and cellular injury. Peroxynitrite is reactive towards many biomolecules which includes amino acids, nucleic acid bases; metal containing compounds, etc. NO metabolites may play a key role in mediating many of the genotoxic/carcinogenic effects as DNA damage, protein or lipid modification, etc. The basic reactions of nitric oxide can be divided as direct effect of the radical where it alone plays a role in either damaging or protecting the cell milieu and an indirect effect in which the byproducts of nitric oxide formed by convergence of two independent radical generating pathways play the role in biological reactions which mainly involve oxidative and nitrosative stress. Nitric oxide is also capable of directly interacting with mitochondria through inhibition of respiration or by permeability transition. Reaction of nitric oxide with metal ions include its direct interaction with the metals or with oxo complexes thereby reducing them to lower valent state. Excessive production of nitric oxide can be studied by inhibiting the synthetic pathway of nitric oxide using both selective or specific nitric oxide synthase inhibitor or non-selective nitric oxide synthase inhibitor with respect to isoforms of nitric oxide.  相似文献   

A review on high power SOFC electrolyte layer manufacturing using thermal spray and physical vapour deposition technologies   总被引：1，自引：0，他引：1  

Pierre Coddet Han-lin Liao Christian Coddet 《上海大学学报(英文版)》2014,(3):212-221

Manufacturing of solid oxide fuel cell （SOFC） components remains nowadays a key point for the indus- trial development of this technology. Especially, the deposition of the dense electrolyte layer which is sand- wiched between the porous anode and the porous cathode is of paramount importance and thus focuses a lot of attention. Therefore, this paper considers and reviews recent developments concerning solid electrolyte layers manufacturing using thermal spray （TS） and physical vapour deposition （PVD） technologies.  相似文献   

层状复合金属氧化物光催化材料的结构与光谱响应特征     

何杰  刘晓天 《六安师专学报》2014,(5):70-75

由金属复合氧化物组成的层状材料,包括铌酸盐、钛酸盐、钛铌酸盐等,因其独特的结构和性质使其成为一种新型光催化材料而被广泛研究。通过调节层板组成、结构以及层间离子等可调变其光催化性能,通过插层（柱撑）、剥离组装等可形成丰富的光催化功能材料。本文就该方向的研究做一简要探讨,为进一步构建新型光催化材料提供参考。  相似文献   

Co-Pi和Cu₂O共修饰TiO₂薄膜及其光电化学性质研究     

姜春香  沈明荣 《常熟理工学院学报》2014,(4):51-54

用阳极氧化法在Ti基片上制备出TiO2薄膜,然后通过电化学沉积法将Co-Pi和Cu2O沉积在TiO2薄膜表面.通过扫描电镜、X-射线衍射和光电化学性质测试,发现TiO2薄膜表面先沉积Co-Pi能够有效阻止Cu2O颗粒堆积,光电流显著提高.而先沉积Cu2O后沉积Co-Pi,则会使Cu2O还原为Cu,同时形貌发生改变.特别地,沉积300秒Co-Pi后再沉积Cu2O颗粒,能得到200 mA/cm2的最大光电流.  相似文献   

对静电辐照促进急性耐力游泳大鼠疲劳恢复作用的研究     

陶胜国 《吉林体育学院学报》2005,21(2):73-74

分析了0．6kv/cm，锄静电场强作用对应激训练后大鼠24h血清NO、SOD、MDA水平的影响。认为在一次急性耐力性游泳训练，并经适宜的静电场处理，可加速大鼠体内自由基的消除，提高体内抗自由基酶类活性，对加速疲劳机体的恢复具有积极的作用。  相似文献   

运动、一氧化氮与学习记忆     

王泽军  徐波  褚昕宇  季浏  杨毅飞 《北京体育大学学报》2006,29(6):809-811

长期适宜的运动对学习记忆提高有着良好的促进作用,其机制是多方面的.一氧化氮作为一种新型的神经递质,与学习记忆密切相关,主要表现在一氧化氮可影响突触传递长时程增强,可调节与学习记忆相关的神经递质的释放,调节脑血流量以及参与神经发育过程和基因表达的调控.运用文献综述法,分别探讨了一氧化氮与学习记忆、运动与学习记忆的关系,并对一氧化氮在运动与学习记忆中的潜在作用进行了较详尽地分析,从而使人们可以更深入地了解运动与学习记忆及一氧化氮三者间的关系.  相似文献   

锑掺杂氧化锡ATO纳米导电粉体的研制     

何焕全  陈进中  伍祥武 《大众科技》2012,(8):106-107

通过设备和工艺的改进,寻求成本低、产率高、比表面积大的工业化锑掺杂氧化锡ATO纳米导电粉体制备方法。即在络合能力强的复合有机酸溶液中加入纯度99.9%以上高纯锡和高纯锑化合物,再滴加硝酸和氨水,进行凝胶化反应和聚合反应,得到棕色透明液体,经过过滤、干燥、热分解和粉碎后,得到纯度达到99.0%以上、粒度小于100纳米、比表面积30m2/g的锑掺杂氧化锡ATO纳米导电粉体,工艺简单、生产周期短、成本低。  相似文献   

Role of Nitric Oxide in Salmonella Infection     

Joya Ghosh 《Indian journal of clinical biochemistry : IJCB》2012,27(3):306-308

Nitric oxide (NO) derivative of l-arginine is an important signaling molecule that mediates a variety of essential physiological processes including vasodilation neurotransmission, and host cell defense. Many types of cells produce NO e.g., smooth muscle cell, endothelial cell, and leukocytes. Host defense functions are known for many bacterial and parasitic infections. In the present study we estimated the levels of serum NO in cases of salmonellosis and in controls. The nitric oxide was estimated by cadmium reduction method, Griess reaction. We observed that in controls the level of NO was (22 ± 2.06) μmol/l and in cases the level was (137.49 ± 29.84) μmol/l. The level of NO was significantly higher than controls (p < 0.001). The raised level of NO could be accounted for by host response to the infection. The host rapidly expresses iNOS, which in turn produces an excess amount of NO. Its cytotoxic effect is by its reactive nitrogen oxide derivative e.g., peroxynitrite. Apart from this it also has anti apoptotic functions. In future one can do follow up study of typhoid cases by bacterial culture.  相似文献