Diseases, Conditions, Syndromes

Study: Portable, point-of-care COVID-19 test could bypass the lab

As COVID-19 continues to spread, bottlenecks in supplies and laboratory personnel have led to long waiting times for results in some areas. In a new study, University of Illinois, Urbana-Champaign researchers have demonstrated ...

Neuroscience

Probe detects the destruction of defective mitochondria

A versatile probe that can detect with pinpoint accuracy the programmed destruction of defective mitochondria—the powerhouses of cells—has been developed by RIKEN researchers. They used it to show that damaged mitochondria ...

Medical research

Molecules in urine allow doctors to monitor skin cancer

What if you could simply provide a urine sample rather than undergo a painful surgical procedure to find out if your cancer was responding to treatment? It may seem too good to be true, but researchers at Pavol Jozef Šafárik ...

Diseases, Conditions, Syndromes

Rapid test for the determination of antibodies against Sars-Cov-2

To determine immunity to SARS-Cov-2 and the effectiveness of potential vaccines, the amount of neutralizing antibodies in the blood of recovered or vaccinated individuals must be determined. A traditional neutralization test ...

Genetics

How to map brain connections using DNA barcodes

A new method developed at Cold Spring Harbor Laboratory (CSHL) uses DNA sequencing to efficiently map long-range connections between different regions of the brain. The approach dramatically reduces the cost of mapping brain-wide ...

Neuroscience

A focused approach to imaging neural activity in the brain

When neurons fire an electrical impulse, they also experience a surge of calcium ions. By measuring those surges, researchers can indirectly monitor neuron activity, helping them to study the role of individual neurons in ...

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Fluorescence

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength. It is a form of luminescence. In most cases, emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation. However, when the absorbed electromagnetic radiation is intense, it is possible for one electron to absorb two photons; this two-photon absorption can lead to emission of radiation having a shorter wavelength than the absorbed radiation.

The most striking examples of fluorescence occur when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible to the human eye, and the emitted light is in the visible region.

Fluorescence has many practical applications, including mineralogy, gemology, chemical sensors (fluorescence spectroscopy), fluorescent labelling, dyes, biological detectors, and, most commonly, fluorescent lamps.

This text uses material from Wikipedia, licensed under CC BY-SA