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The anodic oxidation reactions of borohydride ion involves a novel and complex reaction system of three hydrogen valence states: protide H(superscript --protium H(superscript 0*-proton H(superscript +. Based on cyclic voltammetry and polarization studies, a multi-step mechanism for the oxidation of BH4-on Cu anode in NaOH solution was presented, and a kinetic expression containing the coverages of BH(superscript - subscript 4) and OH-adsorbed on the surface of Cu anode was deduced by the steady state approximation theory.
鉴于BH(上标-下标 4)阳极氧化反应涉及一个复杂的氢负离子H(上标-下标 4)-氢单原子H(上标 0*)-质子H之间价态转化的新颖反应体系,在循环伏安和极化实验研究基础上,提出了NaOH溶液中BH(上标-下标 4)在Cu电极上氧化反应的多步骤机理,导出了包含表面吸附态BH(上标-下标 4, ad)和OH覆盖率θ和θ的电极反应动力学方程。
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Brown rhizomorph and hyphae can be seen on the seedlings'rhizome, main root and side root while nothing is on the tip of the root.It was found that rhizomorph on the surface of roots would die after inoculation in 90 days in pot.
子实体单生或丛生,出菇至成熟3 d~4 d,单个子实体重20.0 g~62.0 g;小粒咖啡苗的根茎、主根及侧根被茶褐色的菌索和菌膜包裹,而根尖及靠近根尖的侧根上没有菌丝和菌索生长或生长很少;盆栽小粒咖啡苗,在接种90 d后其根系表面的菌索死亡。
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A lot of works on both of modification for the electronic structure on the surface of C_(60) and designation of side chain structure have been completed.
这一系列化合物的合成,令C_(60)球表面开环和球体积增大,这对以化学方法置入粒子提供了可能性。
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A stereographic projection is an ancient method of mapping points on the surface of a sphere to points on a plane.
立体投影法:这是一个古老的方法,我们可以用这个方法把一个球形上的表面地图投射到一个平面上。
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First of all, the paper carried out test study on four two-spanned model members of FSMRCWB, including three 1/2-scaled two-storeyed models and one 1/3-scaled three-storeyed model. The paper analyzed the test results, including analysis on mechanical property of the composite wall beam under vertical loads, and failure mode, deformation capacity, aseismic performance under horizontal loads and constant vertical loads. Secondly, the nonlinear property of concrete is studed and the nonlinear models of FSMRCSS is builded by ANSYS. Last, The paper studies the result of ANSYS, which mainly includes the loading-displace curve of FSMRCSS under horizontal loads and constant vertical loads, the mechanics of arch under vertical loads lonely and under horizontal loads and constant vertical loads respectively, and status of the distribution and changing of vertical stress and cross shear on the surface of the suporting beam, and the influence of span ratio and hole.All in all, the caculating results are in good agreement with the test results.
本文首先进行了三个1/2比例的两跨两层和一个1/3比例的两跨三层的框支密肋复合墙梁的模型试验,分析了框支密肋复合墙梁在竖向荷载作用下的受力性能,以及在竖向荷载与水平低周反复荷载共同作用下的受力性能、变形性能、滞回性能、耗能系数及破坏形态;其次,研究了混凝土的非线性特性,建立了框支密肋复合墙梁非线性有限元模型,并借助大型通用有限元软件ANSYS进行计算;再则,进行了非线性有限元结果分析,主要研究框支密肋复合墙梁在竖向荷载与水平地震力共同作用下的荷载位移曲线,分析在竖向荷载单独作用下和在竖向荷载与水平地震力共同作用下墙梁的拱作用,托梁顶面的竖向应力和横向剪应力分布及变化情况,并讨论跨度比、洞口对墙梁拱作用和托梁顶面的竖向应力的影响。
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Study on its topography, orientation and electrical property on the surface of electrode is very necessary and attractive.
另外,蛋白质的力电效应会直接影响蛋白质分子器件的可靠性和稳定性。
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This paper analyzes reasons to form corner and transverse crack on the surface of 150?mm CC billet based on Anyang Steel's production practice.
结合安钢150mm连铸小方坯表面角部横裂纹攻关的实践分析其成因,提出了改进措施,实施后取得了良好的效果。
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The results showed that loading Ag^+, Ni^2+, Cu^2+ or Zn^2+ ion on the activated carbon obviously improved its adsorption of benzothiophene, while loading Fe^3+ or Co^3+ ion on the activated carbon caused a decrease in its adsorption of benzothiophene in comparison with the original unloaded activated carbon, which was due to the variation of the nature of soft and hard acid on the surface of the activated carbon.
采用密度泛函数理论法计算结果表明,苯并噻吩的电负性χ为2.638,属软碱类物质;由于Ag^+为软酸,活性炭负载Ag^+离子,增加了其局部表面的软酸,从而增强了对苯并噻吩硫化物的吸附;由于Ni^2+、Cu^2+和Zn^2+离子属交界酸,负载Ni^2+、Cu^2+、Zn^2+离子增加了活性炭表面的交界酸,也在一定程度上提高了其表面对苯并噻吩硫化物的吸附;当活性炭表面负载了硬酸性Fe^3+或Co^3+离子,其局部表面硬酸增大从而降低了其对苯并噻吩的吸附。
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It caused aggregation of purple membrane fragments at very low concentration. This effect might be attributed to its positive charges because cationic surfactant DTAB acted the same. On the other hand, melittin seemed to have behavior similar to CHAPS which has a rigid cholane ring,both had little effect on the conformation of retinal chromporphores.In consideration of the two-dimensional crystalline structure of purple membrane,melittin may form a rigid conformation such as α-helix on the surface of the membrane.
通过与三种在结构和电荷上不同的表面活性剂与紫膜的作用相比较,可以年出蜂毒作为带正电荷的分子与同样带正电的表面活性剂DTAB在引起紫膜凝聚方面表现相同;但在对紫膜可见光区的吸收光谱和圆二色谱的影响上却与具有刚性结构的CHAPS相似,表明蜂毒可在紫膜表面以一种刚性较大的构象存在,不能进入膜蛋白流水区的深层。
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And the feasibility of the two measurement methods is demonstrated.3 Computer simulation is performed in the situation of air passing by a heating columned thermistor through a round pipeline. The fluid velocity and temperature distributions under different mass flowrate are shown. They reflect the impact the heating thermistor has on the fluid. The velocity distribution on the surface of the heating thermistor is studied and the impact of natural convection is revealed. The lower limit of measurement based on the simulation result is given.
仿真实验结果给出了不同空气质量流量下加热元件周围流体的速度和温度分布,直观反映了加热元件对流动产生的影响;研究了发热元件表面流体的速度分布,揭示了由浮升力引起的自然对流对流量测量的影响,给出了测量下限值的仿真结果;并通过仿真实验数据验证了恒功率热消散式热式流量计的流量方程。
- 推荐网络例句
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Plunder melds and run with this jewel!
掠夺melds和运行与此宝石!
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My dream is to be a crazy growing tree and extend at the edge between the city and the forest.
此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。
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When you click Save, you save the file to the host′s hard disk or server, not to your own machine.
单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。