Flow Rate Parameters
Flow Rate Parameters - Related Videos
13:35
Mass Conservation and Flow Rate Measurements
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The purpose of this experiment is to demonstrate the calibration of a flow passage as a flowmeter using a control volume (CV) formulation [1, 2]. The CV analysis focuses on the macroscopic effect of flow on engineering systems, rather than the detailed description that could be achieved with a detailed differential analysis. These two techniques should be...
02:09
Measurement of Multiple Mitochondrial Parameters in Neurons using Flow Cytometry
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2025
This video demonstrates the labeling of neuronal cells with antibodies for mitochondrial respiratory chain complexes, mitochondrial DNA-associated protein, and mitochondrial outer membrane protein, followed by flow cytometry to quantify their levels.
02:48
Zebrafish Rheotaxis Assay: A Method for Measuring Orientation Behavior in Response to Different Water Flow Rates
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2023
This video describes the rheotaxis assay in zebrafish. The method involves the measurement of orientation behavior of zebrafish in response to different water flow rates under the influence of different magnetic fields.
01:22
Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa
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2025
The pH of urine, the drug's pKa, and the urine flow rate are vital parameters for drug reabsorption and excretion. Urinary pH varies between 4.6 and 8.0 and is influenced by diet, drug intake, and the patient's pathophysiology. It affects a drug's ionization state and reabsorption. For instance, carbohydrate-rich food produces alkaline urine promoting drug excretion, while proteins and certain medications like ascorbic acid lead to acidic urine enhancing reabsorption. The pKa of a drug,...
10:16
Optimization of Flow Cytometric Sorting Parameters for High-Throughput Isolation and Purification of Small Extracellular Vesicles
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Cited by 2 •
2023
This protocol provides a rapid and size-specific isolation method for small extracellular vesicles by optimizing the size of the air spray nozzle, sheath fluid pressure, sample flow pressure, voltage, gain, and triggering threshold parameters.
FAQs
Pressure provides the driving force, while resistance opposes movement through the system. Channel dimensions alter how easily fluid can pass, so changes in the available pathway can modify the resulting rate even when the applied pressure remains unchanged. Considering these variables together helps researchers identify why transport conditions differ between biological devices or liquid-handling setups.
Flow behavior depends on how consistently fluid is delivered and how system conditions interact with the moving fluid. A constant delivery pattern can support steady flow, whereas changing delivery conditions may produce pulses. Under other conditions, movement can become turbulent rather than orderly, making transport less uniform and complicating control of biological processes.
Viscosity describes how strongly a fluid resists movement, so it affects the rate produced under otherwise similar conditions. A more viscous sample may require different pressure or resistance conditions to achieve comparable transport. Accounting for viscosity is especially important when biological fluids or prepared solutions differ in composition, because unrecognized changes can reduce experimental consistency.
Researchers monitor the fluid volume delivered over a defined elapsed time and compare that result with the intended operating condition. They can then adjust relevant pressure, resistance, channel dimensions, or delivery settings to correct deviations. Repeated monitoring helps maintain consistent conditions during liquid handling, perfusion, filtration, chromatography, microfluidic processing, or sample preparation.
These measurements are useful whenever fluid transport, mixing, or delivery must remain controlled. Applications include liquid handling, perfusion, filtration, chromatography, microfluidic processing, and sample preparation. In each setting, the measured rate provides a way to evaluate whether the system is operating consistently and whether processing conditions are suitable for the experiment.
Controlled flow helps protect sensitive cells and biomolecules from excessive shear, which can arise when fluid movement is too forceful for the system or sample. Maintaining an appropriate rate also supports reproducible delivery and processing conditions. Consequently, monitoring flow can improve experimental reliability while reducing variation introduced by inconsistent transport or handling.