Japanese Paleolithic are a technology associated in the rest of the world with the beginning of the Neolithic around 10,000 BC. It is not known why such tools were created so early in Japan. Because of this originality, the Japanese Paleolithic period in Japan does not exactly match the traditional definition of Paleolithic based on stone technology (chipped stone tools). Japanese Paleolithic tool implements thus display Mesolithic and Neolithic traits as early as 30,000 BC. The Paleolithic populations of Japan, as well as the later Jōmon populations, appear to relate to an ancient Paleo-Asian group which occupied large parts of Asia before
Lithium hydride the reaction of lithium hydride and silicon tetrachloride by the Sundermeyer process: Lithium hydride is used in the production of a variety of reagents for organic synthesis, such as lithium aluminium hydride (LiAlH) and lithium borohydride (LiBH). Triethylborane reacts to give superhydride (LiBHEt). Lithium hydride (LiH) is sometimes a desirable material for the shielding of nuclear reactors, with the isotope lithium-7 (Li-7), and it can be fabricated by casting. Lithium deuteride, in the form of lithium-7 deuteride, is a good moderator for nuclear reactors, because deuterium (H-2) has a lower neutron absorption cross-section than ordinary hydrogen (H-1) does, and the