Gamma Counting
Gamma Counting - Related Videos
10:19
Using a Hemacytometer to Count Cells
0 Views •
2023
Many biomedical experiments require manipulation of a known quantity of cells, in order to achieve accurate, reproducible, and statistically-relevant data. Therefore, learning how to count cells is a particularly essential technique for any successful biomedical scientist. The most common way to count cells is by using a hemacytometer - an instrument that bears two laser-etched grids, which aid in the enumeration of an aliquot cells under a simple light microscope. This data can then be used to...
01:32
Evoked Gamma Oscillations for the Treatment of Alzheimer’s Disease
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2025
Begin with a patient diagnosed with Alzheimer’s disease, wearing a gamma therapy stimulation device.The device consists of an eye-set and headphones.Using the controller, activate the device to deliver auditory and visual stimulation.The visual component emits flickering light at a gamma frequency, while the auditory component produces synchronized sound pulses.Gamma oscillations are brain waves generated by synchronized neuronal firing, crucial for cognition and memory.In AD, these...
05:47
Intravital Visualization of Gamma Delta Intraepithelial Lymphocytes
0 Views •
2025
This video demonstrates the visualization of γδ intraepithelial lymphocytes (IELs) in transgenic mice using confocal microscopy. The surgical procedure involves creating a perforation line and making a longitudinal incision to expose the intestinal mucosa and villi. The transgenic mice express reporter proteins exclusively in γδ IELs, allowing their tracking. Intravital imaging captures the dynamic movement of green fluorescence-labeled γδ IELs along the intestinal epithelial cell's basement...
05:47
Counting and Determining the Viability of Cultured Cells
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Cited by 19 •
2008
Determining the number of cells in culture is important in standardization of culture conditions and in performing accurate quantitation experiments. In this video, we demonstrate how cells are counted using a hemacytometer.
09:04
Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons
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Cited by 3 •
2016
The pedunculopontine nucleus (PPN) is located in the brainstem and its neurons are maximally activated during waking and rapid eye movement (REM) sleep brain states. This work describes the experimental approach to record in vitro gamma band subthreshold membrane oscillation in PPN neurons.
FAQs
The instrument links each stage of detection to a measurable signal. Incoming gamma photons produce flashes in a scintillation crystal, and a photodetector converts those flashes into electrical pulses. Counting the pulses provides a numerical readout related to radioactive decay, allowing the activity of a tracer or radioligand to be compared across samples or experimental preparations.
Comparing labeled-molecule accumulation can indicate how strongly or differently a tracer is associated with experimental samples or preparations. In neuroscience, these measurements help assess receptor binding, neurotransmitter transport, tissue distribution, and brain uptake. The resulting quantitative differences provide evidence about molecular interactions without relying only on qualitative observation.
High sensitivity makes it possible to detect and compare radioactive tracer activity in neuroscience samples or preparations. This supports measurements of relatively small differences in accumulation, which can clarify patterns of receptor binding, transport, distribution, or uptake. Such comparisons are especially relevant when evaluating molecular interactions in neuropharmacology and drug development research.
The measurement represents the gamma-emitting activity associated with a labeled molecule in a sample or experimental preparation. Researchers can use that quantitative signal to compare tracer accumulation among tissues or preparations and to evaluate brain uptake. The approach therefore connects radioactive activity with the distribution or interaction of the labeled compound under study.
A radioactive tracer or radioligand provides the measurable label, while the counted signal indicates its activity in the relevant sample or preparation. Researchers can compare these readings to examine receptor binding or neurotransmitter transport and to assess differences in molecular association. This makes the method useful for studying neuropharmacological mechanisms through quantitative rather than solely descriptive measurements.
Gamma counting supports brain imaging research, neuropharmacology, and drug development by quantifying labeled molecules in samples or experimental preparations. Its measurements can be used to examine tissue distribution, brain uptake, receptor binding, and transport. These outcomes help researchers compare tracer accumulation and assess molecular interactions relevant to the development or evaluation of neuroactive compounds.