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Nicotianamine synthase gene has an important function in the Fe-deficiency response of graminaceous monocots, and it catalyzes substance to nicotianamine which plays an important carrier in the internal transport of Fe(superscript 2+) and other divalent metal ions. Nicotianamine can bind with Fe(superscript 2+) to form Fe(superscript 2+)-NA complex and protect plants from toxicity in acidic soil.

烟酰胺合成酶基因在单子叶禾本科的缺铁胁迫应答反应中起着关键作用，它的催化产物烟酰胺是铁及其他二价金属离子在体内吸收和转运的重要载体，且能与Fe(上标 2+)结合形成Fe(上标 2+)-NA复合物，从而使植物在酸性土壤中免受铁毒害。

Based on the colour reaction of copper with sulfocyanate and crystal violet, a new spectrphotometric method for determination of copper in the presence of β-cyclodextrin and arabic gum is proposed. The factors such as acidity, reagent dosage, influence of surfactant and coexisting ions on the reaction were discussed and the optimal conditions were investigated.

研究了在β-环糊精和阿拉伯树胶存在下，在硫酸介质中，硫氰酸盐－结晶紫与铜的显色反应，建立了光度法测定铜的新方法；讨论了酸度、显色剂用量、表面活性剂和共存离子的影响，确定了最佳实验条件。

The formation of polyhalide depends on the combination of central halide ions.

多卤化物的形成取决于中心卤化物离子的结合。

The formation of poly halide depends on the combination of central halide ions.

多卤化物的形成取决于中心卤化物离子的结合。

During magnetic reconnection, the Hall effect plays the important role in thedecoupling of electrons and ions of plasma.

磁重联过程中，Hall效应在等离子体内电子和离子的脱耦方面发挥着重要作用。

Ingredient:Particulate Oil Factor, Hamamelis essence, natural mineral crystal ions, allantoin

成份：微粒控油因子，金缕梅精华，天然矿晶离子，尿囊素。

In recent years, the harmfulness of lead ions pollutants and analysis has been one of the hot topics.

近年来，环境样品中铅离子的危害性及其分析测定问题成为人们日益关注的热点。

In the second chapter, the harmonically confined two ions in a linear trap are considered.

在第二章中，我们研究囚禁在线性Paul阱的谐振子势场中的两离子系统。

Pot experiments were carried out to study the effects of treatments with different concentrations of seawater on growths, distributions of ions, and different absorption of 32P of Helianthus tuberosus seedlings.

中国拥有1 80 0 0km海岸线和2 0 779km2 沿海滩涂，这些地区淡水资源十分缺乏，淡水供需矛盾十分尖锐，而农业用水又占有很大比例，减轻农业用水对淡水资源的压力，是一个十分迫切的任务[1 ，2 ] 。

Different saccharides and metal ions had different effects on Hemagglutination.

不同的糖、金属离子对凝集活性的影响不同，0.02mol／L EDTA可抑制全部凝集素的生物活性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。