Particle Residence
Particle Residence - 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...
09:12
The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
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Cited by 383 •
2013
This video shows the resident-intruder paradigm in rats. This test is a standardized method to measure offensive aggression, defensive behavior and violence in a semi-natural setting. The use of the paradigm for social stress experiments is explained as well.
06:26
Particle Image Velocimetry Investigation of Hemodynamics via Aortic Phantom
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Cited by 5 •
2022
The present protocol describes particle image velocimetry (PIV) measurements performed to investigate the sinus flow through the in vitro setup of the transcatheter aortic valve (TAV). The hemodynamic parameters based on velocity are also determined.
01:05
Noncompartmental Analysis: Mean Residence Time
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2025
According to statistical moment theory, mean residence time (MRT) is an important measure in pharmacokinetics. MRT can be defined as the expected mean of a probability density function distribution. It provides valuable insights into drug disposition in the body. After the administration of a drug through intravenous bolus injection, the drug molecules are distributed throughout the body and remain there for varying periods. The MRT represents the average time these drug molecules stay in the...
08:14
Immunomagnetic Isolation of the Vascular Wall-Resident CD34+ Stem Cells from Mice
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Cited by 1 •
2023
This study has established a stable and efficient method for the isolation, culture, and functional determination of vascular wall-resident CD34+ stem cells (CD34+ VW-SCs). This easy-to-follow and time-effective isolation method can be utilized by other investigators to study the potential mechanisms involved in cardiovascular diseases.
FAQs
Particle size and density affect how strongly particles respond to fluid motion and settling. These properties can cause particles to move at different speeds through the same equipment, producing unequal time spent in process zones. Engineers account for that variation when evaluating transport, reaction progress, separation behavior, and material throughput.
Fluid velocity controls how quickly particles are carried through a system, while geometry determines the available flow paths and zones. Changes in either factor can lengthen or shorten particle residence and may promote uneven flow or accumulation. Assessing both helps engineers connect equipment design and operating conditions with process performance.
Mixing changes how particles are distributed among regions of the equipment, whereas interactions with surfaces can affect their movement through the system. Together, these effects may broaden the range of residence times rather than producing uniform passage. That variation matters when consistent reaction, heat transfer, mass transfer, or separation is required.
The time particles spend in particular process zones affects whether reactions have sufficient opportunity to proceed and whether separation or classification can occur effectively. Residence information therefore links particle transport with reaction completion, heat and mass transfer, and classification performance. It also helps identify operating conditions that may reduce efficiency or product quality.
Engineers use particle-residence information through measurement or modeling to examine how particles move through reactors, fluidized beds, conveying lines, and other process zones. The analysis considers particle properties, fluid velocity, geometry, mixing, settling, and surface interactions. Results can reveal uneven flow, unwanted accumulation, and conditions affecting throughput or safety.
Reactors, fluidized beds, and conveying lines are important settings for analyzing particle residence because particles may experience transport, reaction, settling, or separation within them. Residence analysis supports evaluation of reaction completion, classification, heat and mass transfer, and throughput. It also provides a basis for examining flow nonuniformity and accumulation.
Residence information helps engineers assess process efficiency, product quality, material throughput, and process safety. It can show whether particles move unevenly, accumulate in unwanted locations, or encounter operating conditions that affect performance. In engineering studies, these findings support interpretation of transport, reaction, separation, classification, and transfer behavior within the system.