Virus Separation
Virus Separation - Related Videos
09:50
Single Cell Micro-aspiration as an Alternative Strategy to Fluorescence-activated Cell Sorting for Giant Virus Mixture Separation
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Cited by 9 •
2019
Here, we describe a single cell micro-aspiration method for the separation of infected amoebae. In order to separate viral subpopulations in Vermamoeba vermiformis infected by Faustoviruses and unknown giant viruses, we developed the protocol detailed below and demonstrated its ability to separate two low-abundance novel giant viruses.
08:02
Separation of Mixtures via Precipitation
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2023
Source: Laboratory of Dr. Ana J. García-Sáez — University of Tübingen Most samples of interest are mixtures of many different components. Sample preparation, a key step in the analytical process, removes interferences that may affect the analysis. As such, developing separation techniques is an important endeavor not just in academia, but also in industry. One way to separate mixtures is to use their solubility properties. In this short paper, we will deal with aqueous solutions. The...
07:29
Separating Protein with SDS-PAGE
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2023
Sodium Dodecyl Sulfate Poly-Acrylamide Gel Electrophoresis, or SDS-PAGE, is a widely-used technique for separating mixtures of proteins based on their size and nothing else. SDS, an anionic detergent, is used to produce an even charge across the length of proteins that have been linearized. By first loading them into a gel made of polyacrylamide and then applying an electric field to the gel, SDS-coated proteins are then separated. The electric field acts as the driving force, drawing the SDS...
08:17
Electrophoretic Separation of Proteins
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Cited by 29 •
2008
In this video, we demonstrate a method for electrophoretic separation of proteins using poly-acrylimide gel electrophoresis (PAGE).
18:10
Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency
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Cited by 40 •
2011
The present article describes the steps required to isolate and characterize RNA polymerase fidelity variants of RNA viruses and how to use mutation frequency data to confirm fidelity changes in tissue culture.
FAQs
Virus separation works by selecting physical or surface differences between virus particles and surrounding biological material. Size differences support filtration, while density differences guide centrifugation. Charge or other surface properties can be exploited during chromatography. Choosing a property that differs strongly between the virus and host-cell components improves selectivity and produces a cleaner preparation for later analysis.
Initial separation may remove some unwanted material without producing a sufficiently clean or concentrated sample. Purification further distinguishes virus particles from host-cell components, whereas concentration increases the amount available for downstream work. These steps must be controlled carefully because sample quality and reproducibility depend on retaining the biological properties needed to assess structure, infectivity, or other virus characteristics.
The methods emphasize different separation properties. Filtration primarily exploits particle size, centrifugation separates materials according to density, and chromatography uses charge or surface characteristics. They are therefore complementary rather than interchangeable. A workflow may select one approach or combine several so that distinct types of host-cell material are removed while the desired virus preparation becomes more suitable for analysis or controlled use.
The starting material strongly affects the separation strategy because virus particles may be present in cells, tissues, culture fluids, or other biological materials. Their relevant size, density, charge, and surface properties determine which method can distinguish them from contaminants. Matching the method to both the sample source and the particle properties helps preserve sample quality and supports more reproducible downstream results.
A general workflow begins with a biological sample, followed by a separation step selected for particle size, density, charge, or surface properties. Researchers may then apply purification and concentration to improve the preparation. The resulting material can be assessed for virus structure or infectivity and prepared for molecular studies, imaging, or other controlled biological applications.
Relevant starting materials include cells, tissues, culture fluids, and other biological samples containing virus particles. The principal approaches described for processing them are filtration, centrifugation, and chromatography. These methods can be followed by purification and concentration steps. Together, they provide a way to reduce host-cell material and obtain a preparation appropriate for the intended biological analysis.
A carefully prepared sample can support assessment of viral structure and infectivity while reducing interference from host-cell components. It can also provide material for molecular and imaging studies, where sample quality affects interpretation. Because separation improves reproducibility, the resulting preparation is more useful for comparing observations and for evaluating the biological properties of virus particles.
In biology, separated virus preparations support controlled experimental use and the study of viral properties. The approach also contributes to vaccine research, diagnostic development, and antiviral research by providing material that is cleaner and more consistently prepared. Its value extends beyond isolation alone: reliable separation helps researchers examine viruses and test related applications while maintaining relevant biological properties.