Polystyrene Latex Beads
Polystyrene Latex Beads - Related Videos
09:11
Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
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Cited by 32 •
2014
Latex agglutination testing is a simple, rapid and inexpensive method for serotyping Streptococcus pneumoniae, and has also been widely applied in diagnostic microbiology. This manuscript describes the in-house production of latex agglutination reagents, quality control procedures and the application of this technique to pneumococcal serotyping.
07:52
In Vitro Reconstitution of Spatial Cell Contact Patterns with Isolated Caenorhabditis elegans Embryo Blastomeres and Adhesive Polystyrene Beads
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Cited by 8 •
2019
Tissue complexities of multicellular systems confound the identification of causal relationship between extracellular cues and individual cellular behaviors. Here, we present a method to study the direct link between contact-dependent cues and division axes using C. elegans embryo blastomeres and adhesive polystyrene beads.
11:09
Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness
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Cited by 5 •
2018
A procedure for the synthesis of polystyrene-grafted multiwalled carbon nanotubes using successive chemical modification steps to selectively introduce the polymer chains to the sidewalls and their self-assembly via anisotropic patchiness is presented.
03:45
A Bead-Based Multiplex Immunoassay to Identify Pathogen-Specific Antibodies in Saliva
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2025
This video demonstrates a bead-based multiplex immunoassay technique to simultaneously detect antibodies for multiple environmental pathogens in human saliva. Fluorescent beads were coupled to antigens from different pathogens, which were captured using antibodies in the human saliva sample. Upon labeling the antibodies using a fluorescent reporter, the beads were analyzed using flow cytometry to assess the presence of different pathogen-specific antibodies in the saliva.
09:45
Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
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Cited by 8 •
2011
Dielectrophoresis (DEP) is an effective method to manipulate cells. Printed circuit boards (PCB) can provide inexpensive, reusable and effective electrodes for contact-free cell manipulation within microfluidic devices. By combining PDMS-based microfluidic channels with coverslips on PCBs, we demonstrate bead and cell manipulation and separation within multichannel microfluidic devices.
FAQs
Surface charge and functional groups determine how biological molecules interact with each bead. Proteins, antibodies, nucleic acids, and other ligands may adsorb onto the polystyrene surface or become covalently bound through available chemical groups. These choices affect how the bead presents a recognition molecule and can therefore influence binding, aggregation, movement, or optical measurements.
Target binding can produce measurable changes in bead behavior rather than merely forming an invisible molecular complex. Depending on the assay design, binding may promote bead aggregation, alter movement, or change an optical signal. These responses convert molecular recognition into an observable outcome, allowing researchers to investigate interactions or measure biological behavior using a particle-based system.
Consistent bead size provides a more controlled particle population for comparing biological interactions and assay responses. When particle dimensions are uniform, differences in aggregation, movement, or optical behavior can be interpreted more readily in relation to surface chemistry or target binding. This consistency also supports their use as model particles for examining recognition, adhesion, and transport.
Adsorption and covalent binding provide two distinct strategies for associating proteins, antibodies, nucleic acids, or other ligands with the bead surface. Adsorption relies on interaction with the polystyrene surface, whereas covalent binding connects the ligand through chemical attachment. The selected approach determines how the recognition component is presented during studies of binding and assay performance.
A typical workflow begins by selecting beads with an appropriate size and surface chemistry, followed by associating the chosen ligand with the surface through adsorption or covalent binding. The prepared beads are then exposed to the biological target, and researchers monitor aggregation, movement, or optical changes. The observed response provides information about recognition or assay behavior.
In immunoassays and agglutination tests, antibodies or other recognition molecules can be associated with the bead surface. Interaction with a matching target may link beads together, producing aggregation that can be monitored as an assay response. This approach translates a specific biological recognition event into a visible or measurable particle-level change for evaluating assay performance.
Their uniform size and modifiable surfaces allow researchers to use them as controlled particles in several biological settings. They can serve as flow cytometry controls, objects for microscopy, or model particles in cell separation studies. These applications help examine particle behavior, recognition, adhesion, and transport while reducing variation associated with less-controlled particle populations.
Bead-based experiments can examine how surface-associated ligands recognize targets, how particles adhere to biological components, and how they move or separate in experimental systems. Researchers can also assess assay performance by tracking aggregation or optical responses. In this way, the beads connect molecular interactions with measurable cellular or particle-level behavior in biology.