Luminescence Intensity Measurement
Luminescence Intensity Measurement - Related Videos
06:06
A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
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2016
A simple liquid nitrogen Dewar/cryostat apparatus comprised of a small fused silica optical Dewar, a thermocouple, and a charge-coupled device (CCD) spectrograph are described. The experiments for which this Dewar/cryostat is designed require fast sample loading, freezing, and alignment, accurate and stable sample temperatures, and small size/portability.
02:36
The Luciferase Assay: A High-Throughput Assay to Measure Luminescent Signals Using Engineered Nanoluciferase System-Based Bioreporters
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2025
The video demonstrates the luciferase assay used to quantify luciferase-tagged proteins. The assay uses an engineered luciferase enzyme composed of a large fragment that binds with the small fragment, which is conjugated with a protein of interest. The bound subunits form an active enzyme that, in the presence of the substrate, releases a luminescent signal. This signal is then quantified using a luminometer.
07:04
A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence (FUEL)
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Cited by 2 •
2014
Expanding the foundation and applicability of Fluorescence by Unbound Excitation from Luminescence (FUEL) by surveying the relevant principles and demonstrating its compatibility with a multitude of fluorophores and antibody-targeted conditions.
09:39
A Behavioral Assay to Measure Responsiveness of Zebrafish to Changes in Light Intensities
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Cited by 222 •
2008
We developed the Visual-Motor Response to quantitate the motor output of larval zebrafish in response to light increments and decrements. We also examined zebrafish vision mutants, including the no optokinetic response (nrc) mutants, which were thought to be completely blind when tested by another vision assay, the optokinetic reflex.
04:00
Luminescence-Based Assay to Assess Neurotoxicity of Test Compounds on Neurons
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2025
In this video, we describe a luminescence-based method to assess the neurotoxicity of neurite outgrowth-promoting small molecule compounds on the viability of hNPC-derived neurons. The assay measures intracellular ATP level, an indicator of cell viability, to evaluate neurotoxicity following test compound treatment.
FAQs
The measured light serves as a quantitative readout because photon output can reflect the amount of a target, the level of reporter expression, or the activity of cells or pathogen-associated material. When the assay conditions are defined, changes in emitted intensity can therefore be interpreted as changes in the underlying biological event rather than simply as visible light.
The assay design determines the meaning of the signal. A system configured around a target can produce intensity related to analyte concentration, whereas a reporter-based cellular system can link emission to cellular activity or reporter expression. In infection studies, the same measurement principle may instead track pathogen-associated material, so interpretation depends on what the luminescent reaction represents.
Defined conditions make measurements comparable by keeping the relationship between the luminescent reaction and its biological source consistent. If conditions vary between samples, changes in photon output may be harder to attribute to target amount, reporter expression, cellular activity, or pathogen-associated material. Standardized measurement is therefore important when comparing biological states or treatment responses.
Low background improves the ability to distinguish a biologically generated signal from nonspecific instrument or assay output. This is especially valuable when the relevant change in target, cellular activity, or pathogen-associated material is small. In immunology and infection research, the resulting contrast supports sensitive monitoring of molecular events and clearer comparisons among samples.
A typical workflow establishes the biological assay, uses a luminescent reporter enzyme or light-generating reaction, maintains the relevant conditions, and places the prepared sample in a luminometer. The instrument detects emitted photons and reports their intensity for interpretation against the assay's intended readout, such as target amount, cellular activity, or pathogen-associated material.
It is useful when an immunoassay or detection system needs a sensitive quantitative readout of a target or pathogen-associated material. The measured intensity can support comparisons across samples under defined conditions, helping investigators monitor molecular events without relying solely on qualitative observation. Its low-background signal is particularly relevant to rapid biological detection workflows.
In host-response studies, luminescent output can provide a readout of cellular activity or another selected biological event associated with immune behavior. During antimicrobial or immune-modulating treatment evaluation, measurements can be compared across defined conditions to identify treatment-related changes in the signal. The outcome depends on how the reporter or reaction is linked to the process being studied.