particle size distribution

简明释义

粒度分布

英英释义

例句

1.The particle size distribution in this sample indicates a high level of contamination.

该样本中的颗粒大小分布表明污染水平较高。

2.We need to analyze the particle size distribution of the powder before processing.

在加工之前，我们需要分析粉末的颗粒大小分布。

3.The particle size distribution of the soil affects its drainage properties.

土壤的颗粒大小分布影响其排水特性。

4.In pharmaceuticals, the particle size distribution is crucial for drug absorption.

在制药行业，颗粒大小分布对药物吸收至关重要。

5.A narrow particle size distribution can lead to more uniform material properties.

较窄的颗粒大小分布可以导致更均匀的材料性能。

作文

Understanding the concept of particle size distribution is crucial in various scientific fields, including material science, environmental science, and pharmaceuticals. Particle size distribution refers to the proportion of different sizes of particles within a sample. It is typically represented as a graph or a table that shows the frequency of each particle size in relation to the total number of particles examined.In material science, the particle size distribution of powders can significantly affect their physical properties, such as flowability, density, and reactivity. For instance, in the production of cement, the particle size distribution determines how well the cement will bind with water and other materials. A narrow particle size distribution can lead to better packing and higher density, which enhances the strength of the final product.Similarly, in environmental science, understanding the particle size distribution of pollutants in the air or water is essential for assessing their impact on health and the environment. Smaller particles, often referred to as PM2.5 or PM10, can penetrate deep into the lungs and even enter the bloodstream, leading to serious health issues. By analyzing the particle size distribution, scientists can develop strategies to mitigate pollution and protect public health.In the pharmaceutical industry, the particle size distribution of active ingredients can influence the efficacy and bioavailability of drugs. For example, smaller particles may dissolve faster and be absorbed more readily by the body, while larger particles may have slower dissolution rates. Therefore, controlling the particle size distribution during the manufacturing process is vital for ensuring consistent and effective medication.To measure particle size distribution, several techniques can be employed, including laser diffraction, dynamic light scattering, and sieve analysis. Each method has its advantages and limitations, and the choice of technique often depends on the nature of the sample and the required precision.In conclusion, the concept of particle size distribution plays a pivotal role in various scientific disciplines. Its implications are far-reaching, affecting everything from industrial processes to environmental health and pharmaceutical effectiveness. A thorough understanding of particle size distribution allows researchers and professionals to make informed decisions that enhance product quality, safeguard health, and promote environmental sustainability. As technology advances, the methods for analyzing particle size distribution will continue to improve, providing even greater insights into the behavior of materials at the microscopic level.

理解“粒径分布”这一概念在材料科学、环境科学和制药等多个科学领域中至关重要。“粒径分布”是指样本中不同粒子大小的比例。通常以图表或表格的形式表示，显示每种粒子大小与所检查的总粒子数的频率。在材料科学中，粉末的“粒径分布”会显著影响其物理性质，如流动性、密度和反应性。例如，在水泥生产中，“粒径分布”决定了水泥与水和其他材料结合的效果。较窄的“粒径分布”可以导致更好的堆积和更高的密度，从而增强最终产品的强度。同样，在环境科学中，了解空气或水中污染物的“粒径分布”对评估其对健康和环境的影响至关重要。较小的颗粒，通常称为PM2.5或PM10，能够深深渗透到肺部甚至进入血液，导致严重的健康问题。通过分析“粒径分布”，科学家可以制定减轻污染和保护公众健康的策略。在制药行业，活性成分的“粒径分布”可以影响药物的有效性和生物利用度。例如，较小的颗粒可能更快溶解并被身体更易吸收，而较大的颗粒可能具有较慢的溶解速率。因此，在制造过程中控制“粒径分布”对于确保药物的一致性和有效性至关重要。测量“粒径分布”可以采用多种技术，包括激光衍射、动态光散射和筛分分析。每种方法都有其优缺点，选择技术通常取决于样本的性质和所需的精度。总之，“粒径分布”的概念在各个科学学科中发挥着关键作用。其影响广泛，涉及从工业过程到环境健康和制药有效性的方方面面。深入理解“粒径分布”使研究人员和专业人士能够做出明智的决策，提升产品质量、保障健康并促进环境可持续发展。随着科技的发展，分析“粒径分布”的方法将继续改善，为我们提供更深入的材料微观行为洞察。