divalent

简明释义

英[ˈdaɪˌveɪlənt]美[daɪˈveɪlənt]

adj. 化合物二价的；染色体二价的

英英释义

单词用法

同义词

反义词

例句

1.Heats of hydration of divalent transition metal cations.

元素离子水化热等。

2.Objective To investigate the effects of iron on the expression and regulation of divalent metal transporter 1 (DMT1) that may play an important role in the physiological brain iron metabolism.

目的探讨在脑铁代谢中发挥重要生理作用的二价金属转运蛋白1 (DMT1)的表达及其调控机制。

3.The dose of anti-acid-alkali divalent ions in any water does not precipitate.

本剂抗酸抗碱抗二价离子，在任何水质中不沉淀。

4.The possibilities of formation of complex compound between divalent iodates have been studied.

对二价碘酸盐之间形成复盐的可能性也进行了探讨。

5.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.

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。

6.The systems include pectin beads crosslinked with zinc or any divalent cation of interest, which beads are then coated with Eudragit TM -type polymers.

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。

7.Hardness is caused by divalent metallic cations.

硬度是由一些两价金属阳离子引起的。

8.Calcium alginate gel beads were widely used as drug carriers, which were obtained by the gelation of sodium alginate with divalent cation as Ca2 +.

目前，海藻酸钠与二价钙离子交联反应形成的海藻酸钙凝胶小球作为药物的载体日益受到广泛的应用。

9.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。

10.In chemistry, a divalent element can form two bonds with other elements.

在化学中，一个二价元素可以与其他元素形成两个键。

11.Calcium is a divalent cation commonly found in biological systems.

钙是生物系统中常见的二价阳离子。

12.The divalent nature of iron allows it to participate in various oxidation states.

铁的二价特性使其能够参与各种氧化态。

13.In immunology, some antibodies are divalent, allowing them to bind two antigens.

在免疫学中，一些抗体是二价的，允许它们结合两个抗原。

14.The divalent bond in molecules can significantly affect their stability.

分子中的二价键可以显著影响其稳定性。

作文

In the realm of chemistry, the term divalent refers to an element or ion that has a valence of two. This means that it can form two bonds with other atoms or ions. Understanding the concept of divalent elements is crucial for students and professionals alike, as it plays a significant role in various chemical reactions and compounds. For example, calcium (Ca) is a well-known divalent metal that is essential for many biological processes, including bone formation and muscle contraction. In its ionic form, calcium typically loses two electrons, resulting in a positive charge of +2. This ability to lose two electrons allows calcium to bond effectively with other elements, making it a key player in biochemistry. Moreover, divalent ions are often involved in the formation of salts. When a divalent ion combines with two monovalent ions, they can create a stable compound. A classic example is magnesium chloride (MgCl₂), where magnesium is a divalent ion that pairs with two chloride ions, which are monovalent. This interaction not only highlights the importance of divalent elements in forming compounds but also illustrates their role in maintaining the balance of ions in various solutions. The significance of divalent elements extends beyond chemistry into fields like biology and environmental science. For instance, in biological systems, divalent cations such as magnesium and calcium are vital for enzyme function and cellular signaling. They act as cofactors that facilitate numerous biochemical reactions, underscoring the interconnectedness of chemistry and biology. In environmental science, divalent metals can have both beneficial and harmful effects. While essential for life, excessive concentrations of divalent metals like lead or mercury can be toxic to organisms and ecosystems. Understanding the behavior of these divalent metals in nature is crucial for managing pollution and ensuring environmental health. In conclusion, the concept of divalent is fundamental in various scientific disciplines. From its role in chemical bonding to its significance in biological processes and environmental interactions, divalent elements are integral to understanding the complexities of the natural world. As we continue to explore the intricacies of chemistry, biology, and environmental science, the importance of divalent ions will remain a critical area of study, illuminating the pathways through which life and matter interact.

在化学领域，术语二价指的是具有两个价态的元素或离子。这意味着它可以与其他原子或离子形成两个键。理解二价元素的概念对学生和专业人士来说至关重要，因为它在各种化学反应和化合物中发挥着重要作用。例如，钙（Ca）是众所周知的二价金属，对于许多生物过程至关重要，包括骨骼形成和肌肉收缩。在其离子形式中，钙通常失去两个电子， resulting in a positive charge of +2.这种失去两个电子的能力使钙能够有效地与其他元素结合，使其成为生物化学中的关键角色。 此外，二价离子通常参与盐的形成。当一个二价离子与两个单价离子结合时，它们可以形成一个稳定的化合物。一个经典的例子是氯化镁（MgCl₂），其中镁是一个二价离子，与两个单价氯离子配对。这种相互作用不仅突显了二价元素在形成化合物中的重要性，还说明了它们在维持各种溶液中离子平衡中的作用。 二价元素的重要性超越了化学，延伸到生物学和环境科学等领域。例如，在生物系统中，镁和钙等二价阳离子对酶功能和细胞信号传导至关重要。它们作为辅助因子，促进众多生化反应，强调了化学和生物学之间的相互联系。 在环境科学中，二价金属可能有益也有害。虽然对生命至关重要，但过量的二价金属如铅或汞可能对生物体和生态系统有毒。了解这些二价金属在自然界中的行为对管理污染和确保环境健康至关重要。 总之，二价的概念在各个科学学科中都是基础。从其在化学键合中的作用到其在生物过程和环境相互作用中的重要性，二价元素对于理解自然界的复杂性至关重要。随着我们继续探索化学、生物学和环境科学的复杂性，二价离子的意义将仍然是一个关键研究领域，照亮生命与物质相互作用的途径。