Manual Double Centrifugation
Manual Double Centrifugation - Related Videos
06:10
A Simple Double Centrifugation Tube Method to Obtain Platelet-rich Plasma from Equine Blood
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Cited by 1 •
2025
Platelet-rich plasma (PRP) is used in the treatment of equine musculoskeletal disorders. Different techniques yield PRP with varying platelet and leukocyte concentrations. This article describes a method for obtaining PRP from horse blood.
07:07
Working with Centrifuges
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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
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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...
09:32
Isolation of Human Monocytes by Double Gradient Centrifugation and Their Differentiation to Macrophages in Teflon-coated Cell Culture Bags
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Cited by 98 •
2014
We present a simple and efficient protocol for the generation of human macrophages. Buffy coats are processed by double density gradient centrifugation and isolated monocytes are then differentiated to macrophages in Teflon-coated cell culture bags. This maximizes macrophage yields and facilitates cell harvesting for subsequent experiments.
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...
FAQs
The two centrifugation cycles create repeated opportunities to concentrate spermatozoa while removing material that remains in the surrounding liquid. After the first spin, sperm are collected as a pellet, and removing the supernatant reduces seminal plasma, cellular debris, and other unwanted components before the second spin. This staged separation supports a cleaner, more concentrated final preparation.
The pellet contains the concentrated sperm fraction, whereas the supernatant contains much of the material targeted for removal. Removing the supernatant and carefully resuspending the pellet in a suitable culture medium prepares the sample for the next centrifugation and the final suspension. Proper separation and recovery determine how much sperm remains available for subsequent analysis or use.
Centrifugation conditions must balance effective concentration with protection of the sperm sample. Excessive mechanical stress can affect sperm quality and reduce recovery, even when unwanted components are removed successfully. Careful control of the process is therefore important when preparing material intended for laboratory analysis or clinical use.
The workflow begins with centrifuging the sample to form a sperm pellet. The supernatant is then removed, and the pellet is resuspended in a suitable culture medium. A second centrifugation concentrates the sperm again, after which the supernatant is removed and the pellet undergoes a final resuspension for analysis or clinical application.
The culture medium provides the liquid in which the first pellet is resuspended before the second centrifugation. This step allows the concentrated sperm fraction to be processed again after the initial removal of seminal plasma, debris, and other unwanted components. The final resuspension also produces a preparation that can be handled for its intended laboratory or clinical purpose.
In medicine, the method is relevant when sperm washing is needed for assisted reproductive procedures. It can also produce a more concentrated sperm preparation for laboratory analysis or clinical use. Its value comes from combining removal of unwanted sample components with recovery of a concentrated sperm fraction, while careful handling helps preserve quality and recovery.
The final suspension is intended to contain sperm in a more concentrated preparation than the starting sample, with seminal plasma, cellular debris, and other unwanted components reduced through sequential processing. This outcome supports downstream analysis or clinical use. Interpretation of the result should still consider how centrifugation conditions and pellet handling may have affected sperm quality and recovery.