After the discovery of americium isotopes < sup > 241 </ sup > Am and < sup > 242 </ sup > Am, their production and compounds were patented listing only Seaborg as the inventor.

After the discovery of the reason why the fixture had failed, a comprehensive inspection of the other fixtures in the tunnel revealed that numerous other fixtures were also in the same state of deterioration.

After the discovery of the West Indies by Christopher Columbus in 1492, the Spanish term Antillas was assigned to the lands ; stemming from this, " Sea of the Antilles " is a common alternative name for the Caribbean Sea in various European languages.

After the discovery marine fossils in the Taihang Mountains ( hundreds of miles from the Pacific Ocean ), Shen Kuo devised a theory of land formation, or geomorphology.

After the initial discovery of introns in protein-coding genes of the eukaryotic nucleus, there was significant debate as to whether introns in modern-day organisms were inherited from a common ancient ancestor ( termed the introns-early hypothesis ), or whether they appeared in genes rather recently in the evolutionary process ( termed the introns-late hypothesis ).

After taking further data, the group discovered that this particle did not actually exist, and the " discovery " was named " Oops-Leon " as a pun on the original name ( mispronounced ) and Dr. Lederman's first name.

After his accidental discovery, Reinitzer did not pursue studying liquid crystals further.

After the discovery of Lindow Man, there were no further archaeological excavations at Lindow Moss until 1987.

After Columbus ' initial discovery, the name then evolved along the pronunciations Madinina (" Island of Flowers "), Madiana, and Matinite.

After the discovery of the ozone hole it only took 18 months to reach a binding agreement in Montreal.

After the discovery of a few meteorites in 1967, a public awareness campaign resulted in the finding of nearly 100 new specimens in the next few years, with many being

After 1992, the discovery of numerous small icy objects with similar or even wider orbits than Pluto led to a debate over whether Pluto should remain a planet, or whether it and its neighbours should, like the asteroids, be given their own separate classification.

After the observatory obtained further confirmatory photographs, news of the discovery was telegraphed to the Harvard College Observatory on March 13, 1930.

After studying hundreds of adoptive families, the discovery was that people who grow up together, whether biologically related or not, do not much resemble one another in personality.

After the discovery of the empty tomb, the Gospels indicate that Jesus made a series of appearances to the disciples.

After this discovery, French Jews erected a large monument in the center of the square — a large, black and white globe featuring a prominent Hebrew letter, Shin ( ש ) ( presumably for " Shlomo ", Rashi's name ).

After the discovery and excavation of these monuments and associated stone slabs by Russian archaeologists in the wider area surrounding the Orkhon Valley between 1889 and 1893, it became established that the language on the inscriptions was the Old Turkic language written using the Orkhon script, which has also been referred to as " Turkic runes " or " runiform " due to a superficial similarity to the Germanic runic alphabets.

After the publication of the improved method of flame spectroscopy by Robert Bunsen and Gustav Kirchhoff and the discovery of caesium and rubidium in the years 1859 to 1860, flame spectroscopy became an approved method to determine the composition of minerals and chemical products.

After Pluto's discovery, American astronomer Clyde Tombaugh continued searching for some years for similar objects, but found none.

* After having analyzed the data from the LCROSS lunar impact, in 2009 NASA announced that the discovery of a " significant " quantity of water in the Moon's Cabeus crater.

After this discovery at the mill, the " gold rush " era began and many people came from the east to find fortune.

After Raymond Dart's discovery of the Taung Child, an infant australopithecine, Broom's interest in paleoanthropology was heightened.

After the initial discovery in 1998, these observations were corroborated by several independent sources: the cosmic microwave background radiation and large scale structure, apparent size of baryon acoustic oscillations, age of the universe, as well as improved measurements of supernovae and X-ray properties of galaxy clusters.

After the discovery of Raman scattering by organic liquids, Rasetti decided to study the same phenomenon in gases at high pressure during his stay at Caltech in 1928-29.

After moving to Sarov in 1950, Sakharov played a key role in the development of the first megaton-range Soviet hydrogen bomb using a design known as " Sakharov's Third Idea " in Russia and the Teller-Ulam design in the United States.

After about 379, 000 years the electrons and nuclei combined into atoms ( mostly hydrogen ); hence the radiation decoupled from matter and continued through space largely unimpeded.

After the detonation of the first Soviet fission bomb in August 1949, he, along with Isidor Rabi, wrote a strongly worded report for the committee which opposed the development of a hydrogen bomb on moral and technical grounds.

After an oil drilling operation in 1903 in Dexter, Kansas, produced a gas geyser that would not burn, Kansas state geologist Erasmus Haworth collected samples of the escaping gas and took them back to the University of Kansas at Lawrence where, with the help of chemists Hamilton Cady and David McFarland, he discovered that the gas consisted of, by volume, 72 % nitrogen, 15 % methane ( a combustible percentage only with sufficient oxygen ), 1 % hydrogen, and 12 % an unidentifiable gas.

After a star has formed, it creates energy at the hot, dense core region through the nuclear fusion of hydrogen atoms into helium.

After the hydrogen fuel at the core has been consumed, the star evolves away from the main sequence on the HR diagram.

After the risks caused by the flammability of hydrogen became apparent, it was replaced with helium in blimps and balloons.

White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to become a neutron star — over 97 % of the stars in our galaxy .< sup >, § 1 .</ sup > After the hydrogen – fusing lifetime of a main-sequence star of low or medium mass ends, it will expand to a red giant which fuses helium to carbon and oxygen in its core by the triple-alpha process.

After the advent of nuclear weapons, especially hydrogen bombs, these technologies have usually been the dominant components of doomsday devices.

After the hydrogen in a star's core has fused, stars with more than about 10 solar masses become red supergiants for the duration of their helium-fusing phase.

After 2 hours of breathing air without hydrogen sulfide the mice returned to normal.

After a certain number of steps, we will obtain an alkene and hydrogen gas: CH < sub > 2 </ sub >= CH-CH < sub > 2 </ sub >- CH < sub > 3 </ sub > + H < sub > 2 </ sub > this is very useful since the catalyst can be recycled.

After final checks, the ground crew will fill up the second stage with liquid hydrogen ( LH < sub > 2 </ sub >) and liquid oxygen ( LOX ), with the crew, suited up in new all-purpose spacesuits, entering the spacecraft only three hours before liftoff.

After a launch scrub on 4 April 2002 due to a hydrogen leak, Space Shuttle Atlantis successfully launched on 8 April 2002, from Launch Complex 39B.

After 1952 the first maps of the neutral hydrogen in the Galaxy were made and revealed, for the first time, the spiral structure of the Milky Way.

After this line was discovered, he participated, with Jan Oort and Alex Muller, in the effort to use radio astronomy to map out the neutral hydrogen in our galaxy, which first revealed its spiral structure.

After shutting the inlet cone off at Mach 5. 14, 28. 5 km altitude, the system continues as a closed cycle high performance rocket engine burning liquid oxygen and liquid hydrogen from on-board fuel tanks allowing Skylon to reach orbital velocity after leaving the atmosphere on a steep climb.

Although the most common isotope of uranium, uranium-238 (< sup > 238 </ sup > U ), can be used as secondary fissionable material in hydrogen bombs, it cannot be used as the primary fissile material for an atomic bomb .< sup > 238 </ sup > U can be used to produce < sup > 239 </ sup > Pu, through the fission of < sup > 235 </ sup > U which produces neutrons, some of which will be absorbed by < sup > 238 </ sup > U creating < sup > 239 </ sup > U. After a few days the < sup > 239 </ sup > U will decay, turning into weapons-usable < sup > 239 </ sup > Pu.

After protein folding in aqueous solution, hydrophobic amino acids usually form protected hydrophobic areas while hydrophilic amino acids interact with the molecules of solvation and allow proteins to form hydrogen bonds with the surrounding water molecules.

After a while, free electrons recombine with those hydrogen ions.

After high school, Billings established his own company ( Energy Research Corp, later Billings Energy Corp ) in his hometown of Provo, Utah, in 1972, which he later moved to Independence, Missouri ( 1979 ), to take advantage of the steady supply of byproduct hydrogen near Kansas City, as well as to be in closer proximity to the hydrogen city he was planning to build in the state of Iowa.

After this was canceled when hydrogen proved to be impractical, Rich was program manager for the propulsion systems for the U-2's successor, the SR-71 Blackbird.