The best-known classes of exothermic nuclear transmutations are fission and fusion. Cold fusion researchers have since claimed to find X-rays, helium, neutrons and nuclear transmutations. She is most famous for her research on nuclear transmutations and radioactivity. Most of the very first transmutations were performed by microinjection of DNA directly into cells. Such transmutations are not possible according to mainstream physics, chemistry and biology. Yakuza released "Transmutations" in 2007. Barker had previously worked on "Transmutations" (also known as "Underworld"). Empire Pictures, the USA distributor, retitled the film as Transmutations for the USA market. According to him, transmutations can be controlled by the serum. Transmutations is the fourth full-length studio album by Chicago-based progressive metal band Yakuza.