particle size

简明释义

粒度

英英释义

例句

1.The particle size of the powder affects its solubility in water.

粉末的粒子大小影响其在水中的溶解性。

2.A smaller particle size often leads to higher reactivity in chemical reactions.

更小的粒子大小通常会导致化学反应中的更高反应性。

3.Researchers found that the particle size can influence the drug's absorption rate.

研究人员发现，粒子大小会影响药物的吸收速率。

4.The manufacturer specified a particle size range for optimal performance of the product.

制造商指定了最佳性能产品的粒子大小范围。

5.In soil science, particle size is crucial for understanding drainage and aeration.

在土壤科学中，粒子大小对理解排水和通气至关重要。

作文

Understanding the concept of particle size is essential in various fields, including material science, pharmaceuticals, and environmental science. Particle size refers to the diameter or dimensions of individual particles in a sample. The significance of particle size cannot be overstated, as it plays a crucial role in determining the physical and chemical properties of materials. For instance, in the pharmaceutical industry, the particle size of drug formulations can affect their solubility, bioavailability, and ultimately, their efficacy. Smaller particle sizes often lead to faster dissolution rates, which can enhance the absorption of drugs in the body. Therefore, understanding how to manipulate particle size is vital for developing effective medications.In material science, particle size influences the behavior of powders and solids. For example, in the production of cement, the particle size of the raw materials can determine the strength and durability of the final product. Smaller particles provide a larger surface area for chemical reactions to occur, leading to better bonding and stronger materials. Consequently, engineers and scientists pay close attention to particle size when designing new materials or improving existing ones.Environmental science also relies heavily on the study of particle size. Airborne particles, such as dust and pollutants, can have significant health impacts. The particle size determines how far these particles can travel and how deeply they can penetrate the respiratory system. Fine particles, often referred to as PM2.5 (particles with a diameter of 2.5 micrometers or smaller), can enter the bloodstream and cause severe health issues, including cardiovascular diseases. As a result, monitoring and regulating particle size in air quality assessments are critical for public health.Moreover, the methods used to measure particle size vary depending on the application. Techniques such as laser diffraction, dynamic light scattering, and sieve analysis are commonly employed to obtain accurate measurements. Each method has its advantages and limitations, making it essential to choose the appropriate technique based on the specific requirements of the study.In conclusion, particle size is a fundamental characteristic that influences a wide range of scientific and industrial processes. From enhancing drug delivery in pharmaceuticals to improving material properties in engineering and assessing environmental health risks, understanding and controlling particle size is of paramount importance. As technology advances, the ability to manipulate particle size will continue to open new avenues for innovation and improvement across various disciplines.

理解粒子大小的概念在材料科学、制药和环境科学等多个领域都是至关重要的。粒子大小是指样本中单个粒子的直径或尺寸。粒子大小的重要性不容小觑，因为它在决定材料的物理和化学性质方面起着关键作用。例如，在制药行业，药物制剂的粒子大小会影响其溶解度、生物利用度，最终影响其疗效。较小的粒子大小通常会导致更快的溶解速率，这可以增强药物在体内的吸收。因此，了解如何操控粒子大小对于开发有效的药物至关重要。在材料科学中，粒子大小影响粉末和固体的行为。例如，在水泥生产中，原材料的粒子大小可以决定最终产品的强度和耐久性。较小的颗粒提供了更大的表面积供化学反应发生，从而导致更好的结合和更强的材料。因此，工程师和科学家在设计新材料或改善现有材料时，会密切关注粒子大小。环境科学也严重依赖于对粒子大小的研究。空气中的颗粒，如灰尘和污染物，可能对健康产生重大影响。粒子大小决定了这些颗粒能传播多远以及能深入呼吸系统的程度。细小颗粒，通常称为PM2.5（直径为2.5微米或更小的颗粒），可以进入血液并导致严重的健康问题，包括心血管疾病。因此，在空气质量评估中监测和调节粒子大小对公共健康至关重要。此外，用于测量粒子大小的方法因应用而异。激光衍射、动态光散射和筛分析等技术通常用于获得准确的测量结果。每种方法都有其优缺点，因此根据研究的具体要求选择适当的技术至关重要。总之，粒子大小是影响广泛科学和工业过程的基本特征。从提高制药领域的药物递送到改善工程中的材料性能，再到评估环境健康风险，理解和控制粒子大小至关重要。随着技术的进步，操控粒子大小的能力将继续为各个学科的创新和改进开辟新途径。