Cell Centrifugation
Cell Centrifugation - Related Videos
07:07
Working with Centrifuges
0 Views •
2023
Source: Robert M. Rioux & Suprita Jharimune, Pennsylvania State University, University Park, PA Earth's gravitational force is capable of separating heterogeneous mixtures. However, many systems avert this type of separation owing to the length of time usually required in such cases. Centrifugation is one of the most powerful tools for the separation of heterogeneous mixtures1. It involves the application of centripetal force for sedimentation of the heavier phase, leading to separation of...
01:05
Centrifugation
0 Views •
2024
Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
07:52
An Introduction to the Centrifuge
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2023
The centrifuge is an instrument used in nearly every research lab across the globe. Centrifugation is the process by which a centrifuge is used to separate components of a complex mixture. By spinning laboratory samples at very high speeds, the components of a given mixture are subjected to centrifugal force, which causes more dense particles to migrate away from the axis of rotation and lighter ones to move toward it. These particles can sediment at the bottom of the tube into what’s...
02:13
Centrifugation-Assisted Mitochondrial Transfer to Glioblastoma Stem Cells
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2025
In this video, a method is demonstrated to enable the transfer of fluorescently labeled mitochondria into glioblastoma stem cells (GSCs) through centrifugation. The successful uptake and functional integration of the donor mitochondria are confirmed by detecting the fluoresce using confocal microscopy.
06:53
Cell Fractionation of U937 Cells in the Absence of High-speed Centrifugation
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Cited by 4 •
2019
Here, we present a protocol to isolate the plasma membrane, cytoplasm and mitochondria of U937 cells without the use of high-speed centrifugation. This technique can be used to purify subcellular fractions for subsequent examination of protein localization via immunoblotting.
FAQs
These variables determine how effectively particles move into separate fractions. Increasing rotational speed or extending the run can promote collection of denser material, while changing the medium density alters how particles move relative to the surrounding liquid. Researchers adjust these conditions to favor recovery of whole cells, organelles, or other desired fractions rather than collecting an uncontrolled mixture.
Particles with different physical characteristics respond differently to centrifugal force. Density affects how strongly material moves toward the tube bottom, while size and shape also influence movement through the suspension. These differences allow a sample to be partitioned into fractions with distinct compositions, supporting targeted collection of cells or subcellular components for later analysis.
The medium provides the environment through which cells or components move during spinning. Adjusting its density changes the separation conditions and can help distinguish material with different physical properties. This control is especially useful when the goal is to obtain organelle fractions rather than simply collect all cellular material together, improving the suitability of the preparation for downstream studies.
A suspension is placed in a centrifugation tube and spun under selected conditions of rotational speed, duration, and medium density. The denser material collected at the bottom is treated as the pellet, while the remaining liquid is the supernatant. Researchers then collect the relevant fraction, depending on whether the experiment requires concentrated cells, cellular components, or surrounding liquid.
Cell centrifugation is useful when a biological suspension must be prepared for another procedure. Spinning can gather cells into a pellet, allowing the sample to be concentrated, while cell washing supports removal or exchange of the surrounding liquid. These preparation steps help produce a more suitable sample for microscopy, biochemical assays, or molecular studies.
Fractions produced by the method can support several types of biological investigation. Collected cells or cellular components may be examined by microscopy, tested in biochemical assays, or used in molecular studies. The value of centrifugation lies in providing a controlled preparation whose concentrated or separated material is better suited to the requirements of the next analytical step.
Researchers can use controlled spinning conditions to separate cellular material into fractions based on differences in physical properties. By selecting rotational speed, time, and medium density, they can favor collection of organelles or other components instead of only whole cells. The resulting fractions provide prepared material for biochemical or molecular analysis of cellular organization and function.