DAB Substrate Kit (ab64238) Overview. Product overview This product is available in a two component form consisting of a liquid, refrigerator stable DAB Chromogen and DAB Substrate. Once the two components are combined, the reagent can be used for up to six hours, making it ideal for automated stainers.
The colour photograph of Earthrise-taken by Apollo 8 astronaut, William A. Anders, December 24, 1968. Although the photograph is usually mounted with the moon below the earth, this is how Anders saw it. This photograph was taken during the Apollo 8 mission in December 1968, seven months before the first lunar landing.Apollo 8 was the mission which put humans into lunar orbit for the very first time.lthough the photograph is usually mounted with the moon below the earth, this is how Anders saw it. This photograph was taken during the Apollo 8 mission in December 1968, seven months before the first lunar landing. Apollo 8 was the mission which put humans into lunar orbit for the very first time.
Later scientists called Aristotle the Father of Natural Science because centuries after the ancient scholar's death, his methods formed the basis of the scientific method. Most people in Aristotleâs time believed the earth was flat, but he did not agree. The Greek thinker realized that a lunar eclipse occurred when the earth came between the sun and the moon. The shape of the earthâs shadow, Aristotle observed, was round. If the earth were flat, its shadow would have a much different form. Next, Aristotle considered the position of the North Star. The farther north you journeyed, the closer the North Star seemed to move to the middle of the sky.