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MS parameter: ion source: ESI; 50~800 m/z; ionization voltage: 3.0 kV; dry gas (N2) flow rate: 318 L/h; temp:150 ℃; emale cone voltage: 3.0 kV.

质谱条件:离子源:ESI;检出模式:正负离子二种形式;扫描范围:50~800m/z;电离电压:3.0kV;电喷雾接口干燥气(N2)流速318L/h;离子源温度150℃;锥孔电压30V。

The main research in this paper is ion mobility spectrometry with photo ionization source.

本论文主要研究了以光离子化为离子源的离子迁移谱技术。

The SI source is an array of microhotplates fabricated by microelectromechanical systems process. Besides as an ionizer, this source acts as an ion grid which can be used to inject ions into the drift region of drift tube periodically.

表面离化源为采用微机电系统工艺加工的微热板阵列,除了作为离子产生器,还作为漂移管的一个离子栅,用以实现离子向漂移区的注入。

The isopiestic molalities and water activities have been determined for the systems Li_2SO_4-H_2O and Li_2B_4O_7-H_2O at 273.15K in the ion strength ranges of 0.6063~ 1.7640 mol · kg~(-1),and 0.1069—0.6478 mol· kg~(-1) respectively and for the systems Li_2SO_4-H_2O, Li_2B_4O_7-H_2O and Li_2SO_4-Li_2B_4O_7-H_2O at 298.15K in the ion strength ranges of 0.3577—5.6378 mol·kg~(-1), 0.1747—2.4497 mol·kg~(-1), 0.2394—5.5399 mol · kg~(-1) respectively by the isopiestic method using an improved equipment.

本论文利用改进的等压设备和实验方法测定了273.15K下纯盐水溶液Li_2SO_4和Li_2B_4O_7离子强度范围分别为0.6063~1.7640mol·kg~(-1,0.1069~0.6478mol·kg~(-1)以及298.15K下纯盐水溶液Li_2SO_4和Li_2B_4O_7离子强度范围分别为0.3577~5.6378mol·kg~(-1,0.1747~2.4497mol·kg~(-1)和Li_2SO_4-Li_2B_4O_7-H_2O体系混合盐水溶液离子强度范围为0.2394~5.5399mol·kg~(-1的等压平衡浓度和水活度。

According to the adsorption isotherm, the form of the adsorption wasnt the only one.

其对稀土离子的吸附性能受体系的温度、离子强度的影响很小,对时间的依赖性也很小,也就是说它对稀土离子的吸附有很好的动力学性能。

After that we give a presentation of ion lysenkoism which describe the potential change between the two sides of membrane and present the Hodgkin-Huxley model and it\'s equations set.We introduce the basic conception of stochastic resonance and coherence resonance subsequently.

然后,给出了神经元的基本知识,包括神经元的基本结构,神经元细胞膜离子浓度的分布,离子电位梯度和平衡电位,神经元的静息电位、动作电位,接着本文给出了描述神经元膜两边电压变化的离子学说及Hodgkin-Huxley模型和它对应的方程。

They were recovered f rom the ion exchange bed by dilute HCl and , final2 ly , were replaced in the spent HCl by Al to form valuable water t reatment coagulant and recycleable metals. The effects of resin types , flow rate and flow pattern on the IX t reatment and regeneration were determined. Using 0. 2 M citric acid at p H of 3. 0 , more than 90 % of the heavy...

经柠檬酸处理后,污泥中90%以上的重金属被去除;柠檬酸处理液中的重金属用离子交换法回收,考察了树脂种类、流速、操作方式等因素对离子交换、再生效果的影响;在适宜工艺条件下,重金属的交换率均为100%,而洗脱率均接近90%;柠檬酸及离子交换树脂循环使用,重金属也得到回收,降低了处理成本。

Halogen ion can enter and break the phosphate glass network when they exceed certain content. The short range structure of metaphosphate and polyphosphate glasses are all built with phosphate chains. Most of lead ions still act as network modifiers, and some lead ions enter glass network to form tetrahedron or Pb-O-P linear linkages.

Br〓和F〓离子达到一定浓度时就会进入网络,使得玻璃网络发生断裂。P〓O〓含量为50mol%和40mo1%的玻璃样品结构都为链状结构,一部分pb〓离子进入玻璃网络中作为网络形成体,形成四面体或Pb-O-P键:而大部分的pb〓离子仍然作为网络修饰本。

Factors including pH, concentrations of heavy metals, dosages of minerals, ionic strength and temperature were studied and the results indicated that nepheline syenite and olivine had significantly higher capacity of absorbing heavy metal ions than glacimarine clay since they possessed stronger neutralization ability to acidic solution.

考察的因素包括溶液pH值、重金属离子浓度、矿物用量、离子强度、温度等,并得出结论,霞石正长岩和橄榄石吸附重金属离子的能力明显强于冰海粘土。通过理论分析表明,导致这一现象的原因为霞石正长岩和橄榄石对酸性溶液具有更强的中和能力。

Because of the nondirectional property of ionic bond and the fully delocalized property of pi electrons on carbon layers, translation will not change the electronic structure of carbon layers, resulting in that A-GIC and AE-GIC hare quite good lubrication as well. The electrons come from metals mainly transfer to the delocalized pi orbitals of carbon layers, and the increase of delocalized electrons will make metal graphite intercalation compound more electro-conductive than graphite itself. Because ionic bond between metals and carbon layers is weaker and its lattice energy is much less than that of typical NaCl crystal, so metals could be left from interlayers. The Mulliken populations of C-C in intercalation compounds are smaller than that of graphite, and the HOMO energy level of GIC is higher than that of graphite too. These Lead to that GIC will easier be oxidized.

由于离子键没有方向性,又由于碳层中的π电子是充分离域的,所以碳层不会由于平移而改变其电子结构,金属石墨层间化合物仍具有很好的润滑性;金属失去的电子主要转移到碳层的离域π轨道中,碳层离域电子增多使金属石墨层间化合物的导电性比石墨增强;金属与碳层间的离子键强度比较弱,其晶格能远小于典型的离子晶体,因而金属易从石墨层中脱出;金属石墨层间化合物中的C-C间Mulliken布居值小于石墨中C-C间的值,且金属石墨层间化合物的HOMO能级也高于石墨的HOMO能级,所以石墨层间化合物中的碳原子较石墨更易被氧化。

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