The outer layer of the brain, known as the cortex, is made of different types of neurons. Neuroscience studies suggest that these different neuron types have distinct functions, yet for a long time this was difficult to ascertain, ...
(Medical Xpress) -- Optically monitoring the brain’s neuronal activity can be accomplished in several ways, including electrochromic dyes, hydrophobic anions, calcium imaging, or voltage-sensitive ion channels. Fluorescence ...
Researchers at Masaryk University, Czech Republic, have innovated a technique to track bone development, growth dynamics and healing in a mouse model. In their paper, "Spatiotemporal monitoring of hard tissue development ...
Using a fluorescent probe that lights up when brain cells are electrically active, MIT and Boston University researchers have shown that they can image the activity of many neurons at once, in the brains of mice.
Oct 9, 2019
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Some of the most important tools in the toolbox of modern cell biologists are special chunks of DNA that act like spies, reporting on the cell's function. The markers, known as reporter genes, allow researchers to get a sense ...
Sep 27, 2019
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Research at the University of Leicester is offering new clues into how and why cognitive functions such as memory and learning become impaired with age. A paper published recently in a specialist neuroscience journal shows ...
Aug 12, 2019
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(MedicalXpress)—Researchers from Ohio State University have designed nanoparticles based on naturally occurring green fluorescent proteins that can trace the progression of a cancer drug through human cells. These nanoparticles ...
Northwestern University neuroscientists now can read the mind of a fly. They have developed a clever new tool that lights up active conversations between neurons during a behavior or sensory experience, such as smelling a ...
Dec 4, 2015
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A small molecule called VIP, known to synchronize time-keeping neurons in the brain's biological clock, has the startling effect of desynchronizing them at higher dosages, says a research team at Washington University in ...
Oct 28, 2013
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Researchers at the University of Liège (Belgium) have discovered a new population of macrophages, important innate immune cells that populate the lungs after injury caused by respiratory viruses. These macrophages are instrumental ...
Aug 2, 2024
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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.
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