Particle Classification
Particle Classification - Related Videos
03:37
Subatomic Particles
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2020
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom. The Discovery of the Electron The first clue about the subatomic structure came at the end of the 19th century when J.J. Thomson discovered the electron using a cathode ray tube. This apparatus consisted of a sealed glass...
02:41
Concentration and Purification of Viral Particles
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2026
Source: Fricano-Kugler, C. J., et al. Designing, Packaging, and Delivery of High Titer CRISPR Retro and Lentiviruses via Stereotaxic Injection. J. Vis. Exp. (2016).This video demonstrates the step-by-step process for concentrating and purifying lentiviral particles from a mixed suspension containing host cell debris. The procedure utilizes centrifugation, filtration, and PEG-salt precipitation to isolate viral particles while removing soluble impurities. The final product is resuspended in a...
01:30
Classification of Leukocytes
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2025
Leukocytes are classified into two groups based on the presence or absence of cytoplasmic granules. Granular leukocytes, which contain granules, belong to the myeloid lineage and are divided into three subtypes: neutrophils, eosinophils, and basophils. These cells are roughly spherical and characterized by the granules in their cytoplasm. Neutrophils are the most abundant type of granular leukocytes, comprising 50-70% of all leukocytes. They feature small, evenly distributed granules and a...
01:17
Classification of Illness
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2023
The meaning of illness is individualized to each person who experiences an alteration in health. In contrast, disease is a medical term indicating a pathological change in the structure and function of the body or mind. It is a condition that has specific symptoms and boundaries. An illness is a response to a disease in which the person's level of functioning is changed compared with a previous level. The general classification of illness includes acute and chronic. Acute illness is severe and...
01:18
Classification of Bones
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2025
The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones. Long and Short Bones The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...
FAQs
The decisive properties are particle size, density, shape, and settling behavior. Each property changes how a particle moves through a fluid or across a surface, so the selected process must exploit the strongest difference within the material population. Matching the separation principle to these characteristics improves control over product quality and process efficiency.
These methods distinguish particles through different physical pathways. Screening uses passage across a surface, while sedimentation relies on motion through a fluid. Air classification also uses fluid movement, and cyclonic separation exploits particle motion within a rotating flow pattern. Comparing these mechanisms helps engineers select a classification approach suited to the available particle differences.
Settling behavior affects how rapidly particles move through a fluid, influencing where they are collected or removed. Shape can alter that movement and therefore affect separation based on size or density alone. Considering both factors helps engineers avoid relying on a single nominal property when designing processes for consistent particulate performance.
Engineers first consider which particle differences are most useful, such as size, density, shape, or settling behavior, then select a method that exploits those differences through a fluid or across a surface. Screening, sedimentation, air classification, and cyclonic separation provide different options. The choice supports effective separation, equipment design, and energy optimization.
Particle classification supports mineral processing, powder technology, chemical engineering, and environmental systems. It can help control material size, remove contaminants, recover useful resources, and maintain consistent product quality. These applications connect classification with both manufacturing performance and the management of particulate streams in larger engineered processes.
Accurate classification can produce tighter control of particle populations and improve the consistency of processed materials. It also assists equipment design by clarifying how particles move and separate, while supporting more efficient energy use in large-scale particulate operations. In environmental and resource-oriented systems, the same control contributes to contaminant removal and resource recovery.