本论文着重讨论了NMR中的化学交换问题。
This dissertation is focused on some problems of chemical exchange in NMR.
结果表明，测得的化学交换的速率常数是合理的。
The rate constants of these chemical exchange comply with Eyring or Arrehenuius equation.
综述了化学交换精馏法分离同位素硼10的技术进展。
Advances in boron10 isotope separation by chemical exchange distillation are reviewed.
它们培养菌类，将蚜虫当作家畜来饲养，发对军队作战，使用化学喷雾来警告和迷惑敌人，捕获奴隶，雇佣童工，并且不停地交换信息。
They farm fungi, raise aphids as livestock, launch armies to war, use chemical sprays to alarm and confuse enemies, capture slaves, engage in child labour, exchange information ceaselessly.
部分信息交换可能是在信息素(一种动物间传递信息的化学信号)的辅助下进行。
Part of this information exchange is most likely facilitated by pheromones, chemical signals that are passed between animals to help send messages.
我们同样按照了一个化学开关，它可以允许电子交换过程以相反的方向进行。
We also installed a chemical switch that allowed the electron transfer process to proceed in the opposite direction.
地质特征暗示着火星上曾经流动着液态水，而现在悄无声息的死火山也曾经一度繁荣，在地表和火星内部进行着化学物质交换。
Geologic features imply that liquid water once flowed across the surface, and volcanic activity, now dead, once flourished, recycling chemicals and minerals between the surface and the interior.
在他们的研究中，这些化学家创造了两个分子，它们可以相遇并交换电子，但并不能形成新的化合物。
In their research, the chemists created two molecules that could meet and exchange electrons but not unite to form a new compound.
此外，通过交换水分、能量和化学元素(如碳元素)，这些系统还以不同的方式互相联系着。
And these systems connect with each other in different ways, through the exchange of water, and energy, and chemistry, such as the exchange of carbon.
文章从铸铁的化学成分、微量元素、孕育处理及金属型的热交换方面叙述了产生白口的原理及防白口的有效方法。
From the chemical composition, trace element, inoculation and thermal exchange of metal mold casting, the principle of chill formation and the effective methods for preventing chill were studied.
沉积物-水界面的磷交换过程与沉积物本身的物理化学特征直接相关。
Phosphorus exchange processes between the sediment and water are directly associated with the physical and chemical characteristics of the sediment itself.
研究了化学成分、阳离子交换容量与胶体性能的关系。
The relationship between its colloid properties and chemical compositions as well as cation exchange capacity was researched.
该微球经化学改性后得到一种亲水性良好的新型高效弱阳离子交换色谱固定相。
Based on this media, a new hydrophilic weak cation exchange stationary phase(WCX) for high(performance) liquid chromatography was synthesized by a new chemical modification method.
红壤长期施用单一化学肥料，土壤明显酸化，土壤交换性氢铝显著增加，作物生长变差，产量降低。
The soil became acid obviously, the exchangeable al in soil increased significantly, crop grew poorly and the yield decreased after applying sole chemical fertilizer for long term.
把含有害离子的废液，经由电解、化学、离子交换、膜分离等方法下降至排放标准。
Its processes the liquid with harm ion, by descending to the exhaustion standard through the methods, such as electrolysis, chemistry, ion exchange and the film separation etc.
交换性阳离子组成、养分全量及速效含量可作为评价红粘土红壤化学肥力演化的指标。
The composition of exchangeable cation and the soil nutrient content can be used as the indexes to evaluate soil chemical fertility evolution, especially the former is more important.
以离子交换膜为基础，进行预处理和化学改性。
多亏气候变化学，我们现在非常了解，我们的健康是多么依赖于地球能量交换系统的健康。
Thanks to the science of climate change, we now understand only too well how contingent our human wellbeing is on the "health" of the Earth's systems of energy exchange.
俯冲带流体循环及伴随的化学作用是壳幔演化和物质交换的重要机制。
Cycling processes and simultaneous chemical reactions of fluids in subduction zones play an important role in the evolutions of Earth crust and mantle and in the substance exchange.
结果表明：自制的离子交换纤维具有强碱性离子交换纤维的结构特征和一定的化学稳定性。
The results indicate that the self-made anion exchange fiber has structural characteristics of the strong alkaline anion exchange fiber and certain chemical stability.
结合质子交换膜燃料电池(PEMFC)发动机的工作原理，建立电化学模型。
With working principles of PEMFC engines, an electrochemistry model of PEMFC was established.
粮食烘干是一个复杂的热质交换过程，粮食本身又是一种复杂的生物化学物质。
The grain drying is a complicated heat and substance exchange course, and grain itself is also a kind of complicated biochemistry matter.
聚合物成膜后的研究结果表明，该膜具有良好的机械性能和电化学性能，可能在质子交换膜燃料电池中得到应用。
They can be easily cast into tough membranes and show good mechanical and electrochemical properties. The polymers show good prospective usages in the proton exchange membranes fuel cell.
给出了碰撞分子各自由度间的能量交换模式及各类化学反应的选择模式。
It has got energy transfer models among molecular degrees in collisions and chemical reactions selection models.
给出了碰撞分子各自由度间的能量交换模式及各类化学反应的选择模式。
It has got energy transfer models among molecular degrees in collisions and chemical reactions selection models.
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