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[6] [4] A shift in the circadian phase response curve creates a connection between the amount of light in a day (day length) and depressive symptoms in this disorder. [6] [4] Light seems to have therapeutic antidepressant effects when an organism is exposed to it at appropriate times during the circadian rhythm, regulating the sleep-wake cycle ...
Trijicon specializes in self-luminous optics and night sights, mainly using the low-energy tritium illumination, light-gathering fiber optics and battery-powered LED. [ 1 ] [ 2 ] [ 3 ] Additionally, Trijicon is a contractor for the United States military and supplies the Advanced Combat Optical Gunsight (ACOG) and RX01 reflex sights .
Department store 50 mm Tasco Specialty Refractor on modified mount (lower left) and a 114mm Sky-Watcher reflector. Tasco's telescopes have a reputation as entry-level equipment. [ 2 ] [ 3 ] It is one of several companies advertising their products based on claims of high magnification, far beyond any attainable usable magnification . [ 2 ]
Franz Halberg (July 5, 1919 – June 9, 2013 [1]) was a scientist and one of the founders of modern chronobiology.He first began his experiments in the 1940s and later founded the Chronobiology Laboratories at the University of Minnesota.
They launched the flagship e-commerce site OpticsPlanet.com in 2000, and grew to achieve an annual revenue of over $163 million, and a staff of 300 employees. [1] These figures led OpticsPlanet to be recognized as one of the United States Top 500 ecommerce sites by Internet Retailer Magazine. [ 3 ]
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In vertebrates, the master circadian clock is contained within the suprachiasmatic nucleus (SCN), a bilateral nerve cluster of about 20,000 neurons. [10] [11] The SCN itself is located in the hypothalamus, a small region of the brain situated directly above the optic chiasm, where it receives input from specialized photosensitive ganglion cells in the retina via the retinohypothalamic tract.
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.
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