Mass Flow Rate
Mass Flow Rate - Related Videos
13:35
Mass Conservation and Flow Rate Measurements
0 Views •
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...
02:48
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,...
03:09
Measuring Reaction Rates
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2020
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...
10:59
Mass Cytometry: Protocol for Daily Tuning and Running Cell Samples on a CyTOF Mass Cytometer
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Cited by 48 •
2012
The steps necessary for daily tuning and optimization of the performance of a CyTOF mass cytometer are described. Comments on optimal sample preparation and flow rate are...
FAQs
These variables act together in the relationship between transported matter and movement through a system: increasing density, cross-sectional area, or flow velocity increases the mass passing per unit time when the other factors remain constant. This framework helps explain why biological transport can change when fluid composition, vessel dimensions, or movement speed changes.
A change in any contributing variable changes the amount of matter transported during the same time interval. For example, faster movement carries more mass through a surface, while a larger cross-sectional area provides more space for transport at the same density and velocity. Examining variables separately helps identify which condition drives a measured change.
Density links the amount of matter to the space occupied by a flowing substance. Two flows with similar area and velocity can therefore transport different masses if their densities differ. Including density is important when interpreting transport through biological systems, because a rate based only on movement or pathway size may not represent the actual mass delivered.
A basic calculation compares the change in mass with the elapsed time. Researchers determine how much matter has moved between two measurements, then divide that change by the time interval, reporting the result in units such as kilograms per second. Consistent timing and mass measurements allow rates to be compared across conditions or experiments.
In circulation, the rate provides a way to examine how much blood-related matter moves through a vessel over time. Because the outcome depends on vessel cross-sectional area, fluid density, and movement velocity, comparing rates can reveal how altered transport conditions affect circulation and the delivery of materials through the body.
The measure supports analysis of air transport during respiration, nutrient delivery, and fluid exchange across tissues. Comparing rates under different conditions can show how transport responds when density, pathway area, or velocity changes. This makes the concept useful for connecting physical flow variables with biological functions such as gas exchange and cellular supply.