cations

简明释义

英[ˈkæʃənz]美[ˈkæʃənz]

n. [化学]阳离子；[化学]正离子（cation 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Marine manganese nodule containing a large amount of metallic cations is a natural catalyst.

由于矿物晶格中含有催化剂金属离子，大洋锰结核是天然的催化剂。

2.Structural characteristics and sorptive behaviors and mechanisms for heavy metal cations of bentonite are analysed.

分析了膨润土的结构性质和它对重金属离子的吸附机理。

3.N deposition can acidify the soil and leaching the exchangeable base cations.

氮沉降能引起土壤酸化，同时造成土壤盐基离子淋失。

4.The regular patterns of soil temperature changes with the time and lo-cations are analysed.

分析了土温随时间、空间而变化的规律。

5.The usual source of trivalent cations in water treatment is alum (aluminum sulfate).

在水处理中三价阳离子通常来源于明矾（硫酸铝） 。

6.Ionic liquid is also known as room temperature molten salts, which consists of nitrogen-containing organic cations and inorganic anions.

离子液体又称室温熔盐，基本上是由含氮的有机阳离子和大的无机阴离子组成。

7.Carbon cations are important organic reaction intermediates, and hydrogen shift is a key path through which carbon cations isomerizes.

正碳离子是重要的有机化学反应中间产物，而氢原子移位则是正碳离子异构化的主要反应途径。

8.Surgical and non-surgical indi- cations were assessed by clinical features, volume of hematoma and intracranial pressure.

根据临床表现，血肿量，颅内压力变化，探讨手术与非手术治疗的指征。

9.It is obvious th at A. C. motors are superior to D. C. motors in many appli cations.

显然，交流电机在许多应用场合比直流电机优越。

10.The presence of cations in the solution can affect its pH level.

溶液中存在的阳离子可以影响其pH值。

11.Calcium and magnesium are important cations for human health.

钙和镁是对人类健康重要的阳离子。

12.In electrolysis, cations migrate towards the cathode to gain electrons.

在电解过程中，阳离子朝向阴极迁移以获得电子。

13.Plants absorb essential nutrients through cations in the soil.

植物通过土壤中的阳离子吸收必需的养分。

14.In chemistry, cations are positively charged ions that attract negatively charged ions.

在化学中，阳离子是带正电荷的离子，它们吸引带负电荷的离子。

作文

In the realm of chemistry, understanding the role of ions is fundamental. Among these ions, there are two main categories: anions and cations. While anions are negatively charged ions, cations (阳离子) are positively charged ions that play a crucial role in various chemical reactions and processes. This essay will delve into the significance of cations (阳离子), their formation, their impact on our daily lives, and their applications in different fields.Cations are formed when an atom loses one or more electrons, resulting in a net positive charge. This process can occur through various means, such as chemical reactions, ionization, or even through physical processes like evaporation. For example, when sodium (Na) loses an electron, it becomes a sodium cation (阳离子), denoted as Na+. This simple transformation is crucial for the formation of ionic compounds, which are essential in both nature and industry.One of the most significant roles of cations (阳离子) is in the field of biochemistry. In living organisms, cations (阳离子) such as calcium (Ca²+), potassium (K+), and sodium (Na+) are vital for numerous physiological functions. For instance, calcium ions are essential for muscle contraction and neurotransmitter release. Potassium and sodium ions are critical for maintaining the electrical potential across cell membranes, which is necessary for nerve impulse transmission and muscle function. The balance of these cations (阳离子) is crucial for the overall health of living organisms.Moreover, cations (阳离子) also have significant implications in environmental science. In soil chemistry, the presence of certain cations (阳离子) can affect soil fertility and plant growth. Cations such as magnesium (Mg²+) and calcium (Ca²+) contribute to soil structure and nutrient availability. Farmers often monitor the levels of these cations (阳离子) to optimize crop yields and ensure sustainable agricultural practices.In the field of technology, cations (阳离子) are also used in various applications. For instance, in batteries, cations (阳离子) play a crucial role in the movement of charge. Lithium ions (Li+) are commonly used in rechargeable lithium-ion batteries, which power everything from smartphones to electric vehicles. The ability of these cations (阳离子) to move between the anode and cathode during charging and discharging cycles is what makes these batteries efficient and reliable.Furthermore, the study of cations (阳离子) extends to fields like medicine and pharmacology. Many drugs are designed to interact with specific cations (阳离子) in the body, influencing physiological responses. For example, certain medications target calcium cations (阳离子) to manage blood pressure or treat heart conditions. Understanding how cations (阳离子) interact with biological systems is essential for developing effective treatments and improving healthcare outcomes.In conclusion, cations (阳离子) are not just mere chemical entities; they are integral to the functioning of life, the environment, and technology. Their formation and behavior influence a myriad of processes, from the microscopic level within our cells to the macroscopic level in our ecosystems and industries. As we continue to explore the world of chemistry, recognizing the importance of cations (阳离子) will undoubtedly enhance our understanding of various scientific disciplines and their applications in real-world scenarios.