Luminescence Decay Analysis
Luminescence Decay Analysis - Related Videos
02:48
Radioactive Decay and Radiometric Dating
0 Views •
2020
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time. The SI unit for activity is the becquerel, which is one disintegration per second. Another unit of activity is the...
07:42
Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter
0 Views •
Cited by 18 •
2016
The circadian clock regulates about a third of the Arabidopsis transcriptome, but the percentage of genes that feed back into timekeeping remains unknown. Here we visualize a method to rapidly assess circadian phenotypes in any mutant line of Arabidopsis using luminescent imaging of a circadian reporter transiently expressed in protoplasts.
08:45
Cerenkov Luminescence Imaging (CLI) for Cancer Therapy Monitoring
0 Views •
Cited by 8 •
2012
Use of Cerenkov Luminescence Imaging (CLI) for monitoring preclinical cancer treatment is described here. This method takes advantage of Cerenkov Radiation (CR) and optical imaging (OI) to visualize radiolabeled probes and thus provides an alternative to PET in preclinical therapeutic monitoring and drug screening.
02:27
Nonsense-mediated mRNA Decay
0 Views •
2020
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs. Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
01:16
Interference and Decay
0 Views •
2025
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations. Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
FAQs
Rapid and slower portions of the curve can reflect different contributions to emission loss, including radiative and nonradiative processes. Examining these components rather than treating the signal as a single decline may reveal that more than one behavior is present. In biological measurements, this distinction can help identify changes in a reporter’s environment or molecular state.
Luminescence lifetime summarizes how long emission persists after excitation and provides a measurable feature for comparing reporter behavior. Changes in lifetime can indicate that the reporter experiences a different environment or condition, even when intensity alone may not fully describe the response. This makes lifetime useful for characterizing fluorescent and bioluminescent reporters in quantitative biological studies.
Radiative processes contribute to light-producing emission, whereas nonradiative processes contribute to energy loss without the measured light output. Their relative contributions influence the shape and timing of the decay curve. Separating rapid and slower decay behavior therefore helps researchers interpret why emission changes and assess how molecular or cellular conditions affect a luminescent system.
The decay pattern can serve as an indicator of the conditions surrounding a luminescent molecule or reporter. When the measured curve or estimated lifetime changes, researchers can compare those differences with molecular interactions or altered cellular conditions. This approach adds time-dependent information to reporter analysis, supporting interpretation of biological changes beyond a single emission-intensity measurement.
A typical measurement records emission intensity at defined time points after the luminescent molecule or material has been excited. The resulting values are organized as a decay curve, which can then be interpreted by estimating luminescence lifetime and examining rapid or slower components. This workflow converts time-dependent emission into parameters suitable for biological comparison and analysis.
Researchers can apply the method to characterize fluorescent and bioluminescent reporters, monitor molecular interactions, and assess changes in cellular conditions. The resulting decay information can support imaging, biosensor design, and quantitative studies of dynamic biological processes. It is especially valuable when the timing of emission provides biological information that complements the measured intensity.