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Voltage-sensitive dyes have been used to measure neural activity in several areas of the nervous system in a variety of organisms, including the squid giant axon, [19] whisker barrels of the rat somatosensory cortex, [20] [21] olfactory bulb of the salamander, [22] [23] [24] visual cortex of the cat, [25] optic tectum of the frog, [26] and the ...
Photobleaching: The movie shows photobleaching of a fluorosphere. The movie is accelerated, the whole process happened during 4 minutes. In optics, photobleaching (sometimes termed fading) is the photochemical alteration of a dye or a fluorophore molecule such that it is permanently unable to fluoresce.
The Alexa Fluor family of fluorescent dyes is a series of dyes invented by Molecular Probes, now a part of Thermo Fisher Scientific, and sold under the Invitrogen brand name. Alexa Fluor dyes are frequently used as cell and tissue labels in fluorescence microscopy and cell biology . [ 1 ]
Retinylidene proteins, such as Channelrhodopsins or Halorhodopsins, are light sensitive cation and chloride channels, which open during illumination with blue and yellow light, respectively. This principle has been successfully employed to control the activity of neurons in living cells and even tissue and gave rise to a whole new research ...
A simplified Jablonski diagram illustrating the change of energy levels.. The principle behind fluorescence is that the fluorescent moiety contains electrons which can absorb a photon and briefly enter an excited state before either dispersing the energy non-radiatively or emitting it as a photon, but with a lower energy, i.e., at a longer wavelength (wavelength and energy are inversely ...
Fluorescent penetrant inspection (FPI) is a type of dye penetrant inspection in which a fluorescent dye is applied to the surface of a non-porous material in order to detect defects that may compromise the integrity or quality of the part in question. FPI is noted for its low cost and simple process, and is used widely in a variety of industries.
Pink eye is among the most unwanted and common infections around. The swollen red eyes, dried pus, and sticky discharge is enough to make anyone suffering with the condition want to avoid being ...
Light sensitivity or photosensitivity refers to a notable or increased reactivity to light. Apart from vision , human beings have many physiological and psychological responses to light. In rare individuals an atypical response may result in serious discomfort, disease, or injury.