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Object Record

Catalog Number 12.0008.003
Object Name Flash, Photolysis
Title Flash Photolysis Apparatus
Description Steel box. The top is stainless steel screwed on to the sides. A Hamamatsu E2608 flash is connected into the box, as is an electrical cord. The top has plug-ins for flash voltage, a dial for "MC Adjust", switch for selecting speed/power, connector for "ext trig.", fuse, toggle for on/off.
Date c. 1956
Accession number 12.0008
Caption Flash Photolysis Apparatus
Catalog date 2012-10-17
Catalog type History
Provenance Dr. William Hagins designed this instrument to use in flash photolysis, although this instrument has a commercial xenon flash. The power supply was made by Hagins. The flash is used for very bright light while taking very rapid photos. Hagins was one of the first to use the falsh tube in biology. He began in while a student at Cambridge, England when measuring the quantum efficiency of rhodopsin. The question was: when excited, does rhodopsin change to signal the brain that light was absorbed, because it could be excited and come back to its original state unchanged, but it has to change to be effective. Through flash photolysis, Hagins wanted to see how much rhodopsin increased and how much didn't. He thought about 50% would go back to its original state, which turned out to be very near the absolute rate later measured with more sophisticated instruments.
Number of images 1
Updated 2014-03-18
Condition Good
Credit line Courtesy of Dr. Shuko Yoshikami
Organizations NIH; NIDDK (National Institute for Diabetes Digestive and Kidney Disease)
Buildings Building 2
NIH Property # none
Old NIH Property # none
Serial # none
People Hagins, William A.
Yoshikami, Shuko