Dye Coupling Detection
Dye Coupling Detection - Related Videos
01:11
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
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2023
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.
03:54
Multiplexed Quantitative Bacterial Detection using Dye-Labeled Magnetic Microspheres
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2025
Source:Rhea Kang1, Gabby Mora1, Sherry Dunbar11Luminex, A DiaSorin Company, Austin.This video demonstrates multiplexed quantitative bacterial detection employing carboxylated magnetic polystyrene microspheres dyed into distinct sets. The procedure encompasses the formation of bead-bacteria complexes, magnetic separation, and flow-based analysis, enabling precise and simultaneous quantification of multiple bacteria in the same reaction well.
11:09
Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres
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Cited by 5 •
2011
We describe a multiplex method for the detection of microorganisms within a sample using oligonucleotide-coupled fluorescent beads. Amplicon from all organisms within a sample is hybridized to a panel of probe-coupled beads. A Luminex or Bio-Plex instrument is used to query each bead for bead type and hybridization signal.
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
07:42
Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging
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Cited by 33 •
2008
This video shows techniques for labeling of human embryonic stem cells and mesenchymal stem cells with fluorescent dyes. This technique can be used for an in vivo tracking of transplanted stem cells with optical imaging and for histopathological correlations with fluorescence microscopy.
FAQs
Gap junction channels connect neighboring cells in a way that permits small molecules and ions to pass between them. When a tracer introduced into one neuron or glial cell appears in adjacent cells, that transfer provides evidence that the cells communicate directly through such channels. Because ions can also cross these connections, the observation is relevant to electrical coupling.
The presence of tracer in neighboring cells indicates that communication may occur between the initially loaded cell and those cells. The extent of spread shows how broadly the connected group is represented, while the transfer pattern helps reveal the organization of the participating cellular network. Together, these features provide structural context for studying coupled neural or glial populations.
Dye movement links an observable tracer signal to the functional permeability of intercellular channels. If material spreads from a loaded neuron or glial cell into adjacent cells, the pattern can indicate that those cells participate in a shared communication pathway. This is especially useful when investigating whether coupling occurs within neuronal groups, glial populations, or between neighboring cellular elements.
A researcher first introduces a fluorescent or otherwise visible tracer into a selected neuron or glial cell. The surrounding cells are then examined for tracer transfer, with attention to which neighbors contain dye and how far the signal extends. Interpreting the presence and distribution of transferred material provides evidence about direct cellular communication and network organization.
A visible tracer makes movement from the initially loaded cell into neighboring cells observable. Fluorescent labeling can show where transferred material appears, while other visible dyes can provide the same general type of transfer evidence when their spread can be examined. The selected tracer therefore serves as the readout for assessing coupling between adjacent neural or glial cells.
This approach is useful for examining neural circuit organization, communication among glial cells, and connectivity during development. It can reveal which cells participate in connected groups and how those groups are arranged. Researchers may also apply it when studying physiological or pathological conditions, where changes in the extent or pattern of coupling may provide evidence of altered intercellular communication.
Comparing the presence, extent, or pattern of tracer transfer across conditions can show whether cellular communication has changed. Reduced or expanded spread, or a different arrangement of labeled neighboring cells, may indicate altered coupling within the examined network. In neuroscience, such comparisons can help relate cellular connectivity to normal physiology, development, or pathological states.