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硬度是由一些两价金属阳离子引起的。Hardness is caused by divalent metallic cations.

元素离子水化热等。Heats of hydration of divalent transition metal cations.

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本剂抗酸抗碱抗二价离子，在任何水质中不沉淀。The dose of anti-acid-alkali divalent ions in any water does not precipitate.

对二价碘酸盐之间形成复盐的可能性也进行了探讨。The possibilities of formation of complex compound between divalent iodates have been studied.

二碘化钐是二价稀土试剂中的代表化合物，在有机合成中用途广泛。Samarium diiodide has been found to be a useful divalent lanthanide reagent for a variety of organic reactions.

报道了合成二价钐激活的复合氟化物的简单方法。A simple technique for preparation of powder binary fluorides activated with divalent samarium ions is described.

裂纹从管内壁开始向外扩展，裂纹面上有负二价硫离子存在。Cracks expanded from the inner tube wall to external wall, and divalent sulfur ions were found on the surface of cracks.

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该稳定剂是含有二价金属离子的化合物，例如碱土金属的碱式盐。The stabilising agent is a compound containing divalent metal ions, for example a basic salt of an alkaline earth metal.

合成了两个二价的过渡金属磺酸化合物，并通过X-射线衍射单晶结构分析进行结构表征。Two novel divalent transition metal disulfonates were synthesized and characterized by X ray single crystal diffraction.

并讨论了二价碘酸盐水化物的稳定性与阳离子电负性的关系。The stability of hydrated divalent iodates is expected to be related to the electronegativity of the corresponding cations.

说明了ST可以通过基因串联提高表达产物抗原活性，这为产肠毒素大肠杆菌多价疫苗的研制提供了重要的研究基础。It showed that the ST antigenicity could be improved and provide theoretical basis for developing a divalent vaccine against ETEC.

不同二价阳离子因为其与细胞表面官能基键结常数不同，而造成不同的电泳迁移率的变化。Because of different binding constants with surface functional group, there is different mobility with different kinds of divalent cation.

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显然这看起来是一个问题,因为我们知道实际上，甲烷是四价的，而这告诉我们它仅仅是二价的。So this should immediately look like a problem because we know, in fact, that methane is tetravalent, and this is telling us it's only divalent.

显然这看起来是一个问题，因为我们知道实际上，甲烷是四价的，而这告诉我们它仅仅是二价的。So this should immediately look like a problem because we know, in fact, that methane is tetravalent, and this is telling us it's only divalent.

电解质能大大增强PAM在黏土矿物上的吸附，其中二价离子比一价阳离子更有效。The amount of anionic PAM adsorbed on clay minerals increases greatly by electrolyte in which divalent cation is more effective than monovalent cation.

所述系统包括与锌或任何目的二价阳离子交联的果胶珠粒，所述珠粒然后用型聚合物包被。The systems include pectin beads crosslinked with zinc or any divalent cation of interest, which beads are then coated with Eudragit TM -type polymers.

结论抗原MPT83和MPT64二价基因疫苗有效提高了机体保护效力，对于结核病的防治具有一定的借鉴价值。Conclusion The divalent vaccine containing the antigens MPT83 and MPT64 effectively heightens the protective efficiency of vaccine against tuberculosis.

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对实验数据的分析表明，在二价金属离子对膜脂的影响中，膜脂起了主导作用。The analysis of the experimental data indicates that membrane lipids play a leading role in the interaction of divalent metal ions with membrane lipids.

研究了金属离子对DNA拉伸的影响，发现一价金属离子和二价金属离子对DNA的影响有显著的差别。It is found that the effects of monovalent and divalent cations were significantly different. Stretch-induced melting of single DNA molecules was directly observed.

锌离子随着神经元的活动从突触前膜的囊泡中释放到突触间隙，对突触内受体进行调控。This divalent cation is released from presynaptic vesicles into the synaptic cleft upon neuronal activity and acts as a modulator of many ligand-gated ion channels.