particle size

简明释义

粒度

英英释义

例句

1.In soil science, particle size 颗粒大小 affects water retention and drainage.

在土壤科学中，颗粒大小影响水分保持和排水。

2.Environmental scientists study the particle size 颗粒大小 of pollutants in the air.

环境科学家研究空气中污染物的颗粒大小。

3.In food processing, the particle size 颗粒大小 of ingredients can influence texture and flavor.

在食品加工中，成分的颗粒大小可以影响口感和风味。

4.Manufacturers often control the particle size 颗粒大小 to ensure product consistency.

制造商通常控制颗粒大小以确保产品的一致性。

5.The effectiveness of the drug can depend on the particle size 颗粒大小 of its active ingredients.

药物的有效性可能依赖于其活性成分的颗粒大小。

作文

Understanding the concept of particle size is crucial in various scientific fields, including chemistry, physics, and environmental science. Particle size refers to the diameter or dimensions of individual particles within a substance. The significance of particle size can be observed in numerous applications, from pharmaceuticals to materials science. For instance, in drug formulation, the particle size of active ingredients can influence the rate of dissolution and absorption in the body, ultimately affecting the drug's efficacy. Smaller particle sizes often lead to faster absorption rates, which is why many medications are designed with nanoparticles or fine powders.In environmental science, understanding particle size is vital for studying air quality and pollution. Particulate matter (PM), which is classified based on particle size, has significant health implications. PM10 and PM2.5 refer to particles that are 10 micrometers and 2.5 micrometers in diameter, respectively. These tiny particles can penetrate deep into the lungs and even enter the bloodstream, causing respiratory and cardiovascular issues. Thus, monitoring particle size is essential for public health and safety.Furthermore, in the field of materials science, particle size affects the properties of materials such as strength, reactivity, and thermal conductivity. For example, in the production of concrete, the particle size of the aggregate used can determine the strength and durability of the final product. Smaller aggregates may lead to a denser and stronger concrete, while larger aggregates can create voids and reduce strength.The measurement of particle size can be conducted using various techniques, including laser diffraction, dynamic light scattering, and electron microscopy. Each method has its advantages and limitations, and the choice of technique often depends on the specific requirements of the study or application. For example, laser diffraction is commonly used for its speed and ability to measure a wide range of particle sizes, while electron microscopy provides high-resolution images but is more time-consuming and complex.In conclusion, the concept of particle size plays a pivotal role across multiple disciplines. Its impact is evident in drug delivery systems, environmental monitoring, and material properties. A thorough understanding of particle size not only enhances scientific research but also contributes to advancements in technology and public health. Therefore, continued exploration and innovation in measuring and manipulating particle size will undoubtedly lead to significant breakthroughs in various fields, improving our quality of life and understanding of the world around us.

理解粒子大小的概念在化学、物理和环境科学等多个科学领域至关重要。粒子大小是指物质中单个粒子的直径或尺寸。粒子大小的重要性可以在许多应用中观察到，从制药到材料科学。例如，在药物配方中，活性成分的粒子大小可以影响药物在体内的溶解和吸收速率，最终影响药物的疗效。较小的粒子大小通常会导致更快的吸收速率，这就是为什么许多药物设计为纳米颗粒或细粉的原因。在环境科学中，理解粒子大小对于研究空气质量和污染至关重要。颗粒物（PM）根据粒子大小进行分类，对健康有显著影响。PM10和PM2.5分别指直径为10微米和2.5微米的颗粒。这些微小的颗粒可以深入肺部甚至进入血液，引起呼吸和心血管问题。因此，监测粒子大小对公共健康和安全至关重要。此外，在材料科学领域，粒子大小影响材料的强度、反应性和热导率等性质。例如，在混凝土生产中，所用骨料的粒子大小可以决定最终产品的强度和耐久性。较小的骨料可能会导致更密实、更强的混凝土，而较大的骨料则可能形成空隙，降低强度。粒子大小的测量可以通过各种技术进行，包括激光衍射、动态光散射和电子显微镜。每种方法都有其优缺点，选择技术通常取决于研究或应用的具体要求。例如，激光衍射因其速度和能够测量广泛的粒子大小而被广泛使用，而电子显微镜提供高分辨率图像，但更耗时且复杂。总之，粒子大小的概念在多个学科中发挥着关键作用。其影响在药物输送系统、环境监测和材料特性中显而易见。对粒子大小的透彻理解不仅增强了科学研究，还促进了技术和公共健康的进步。因此，继续探索和创新粒子大小的测量和操控无疑将带来各个领域的重大突破，提高我们的生活质量和对周围世界的理解。