Centrifugation Suspension
Centrifugation Suspension - Related Videos
03:39
Preparation of Virus-Enriched Suspension Using Stepwise Sucrose Centrifugation
0 Views •
2026
Source: Vijayraghavan, S. and Kantor, B. A Protocol for the Production of Integrase-deficient Lentiviral Vectors for CRISPR/Cas9-mediated Gene Knockout in Dividing Cells. J. Vis. Exp., (2017)This video demonstrates a two-step ultracentrifugation method using sucrose gradients and cushions to purify and concentrate viral particles from cell culture supernatant. The procedure enables separation based on buoyant density, allowing recovery of intact virus suitable for downstream applications.
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...
03:52
Suspension Culture Production and Purification of Adeno-Associated Virus by Iodixanol Density Gradient Centrifugation for In Vivo Applications
0 Views •
Cited by 1 •
2024
Adeno-associated virus is produced in suspension cell culture and purified by double iodixanol density gradient centrifugation. Steps are included to increase total virus yield, decrease the risk of virus precipitation, and further concentrate the final virus product. Expected final titers reach 1012 viral particles/mL and are suitable for pre-clinical in vivo use.
07:52
An Introduction to the Centrifuge
0 Views •
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
Separation depends on how suspended components respond to centrifugal acceleration, particularly their size, density, and shape. Components with different physical properties move through the liquid at different rates, allowing them to become distributed into distinct fractions. This principle explains why a single suspension can yield a concentrated pellet containing some material while other components remain in the supernatant.
The pellet and supernatant represent different portions of the original sample. Material driven through the liquid collects in the pellet, whereas components that remain suspended are retained in the supernatant. Examining or using these fractions separately allows researchers to analyze selected cellular or subcellular material rather than treating the starting mixture as chemically and structurally uniform.
Speed and time determine the conditions under which suspended components travel through the liquid and separate. Changing these parameters can alter which material reaches the pellet and which remains in the supernatant. Defined conditions are therefore important for obtaining reproducible fractions, especially when the goal is to compare molecular, biochemical, or imaging results across samples.
Size alone does not determine movement through the suspension. Density and shape also influence how each component responds to centrifugal force, so particles with similar dimensions may travel at different rates. Considering all three properties helps explain the composition of the resulting fractions and supports more informed interpretation of what is present in a pellet or supernatant.
In neuroscience, suspensions prepared from brain tissue can support the isolation of cells, nuclei, synaptosomes, and other subcellular organelles. Separating these materials into fractions provides sample types suited to different investigations. The resulting preparations can be used for molecular, biochemical, and imaging analyses focused on neural structure or function.
Separated neural fractions provide access to material that may be difficult to study effectively within an unfractionated tissue homogenate. Cell, nuclear, synaptosomal, or organelle-enriched material can supply distinct preparations for molecular and biochemical measurements, as well as imaging studies. These outcomes help researchers examine components of neural systems at cellular and subcellular levels.