翻訳と辞書 Words near each other ・ Nitrogen monosulfide ・ Nitrogen mustard ・ Nitrogen narcosis ・ Nitrogen nutrition in the arbuscular mycorrhizal system ・ Nitrogen oxide ・ Nitrogen Oxide Protocol ・ Nitrogen oxide sensor ・ Nitrogen pentafluoride ・ Nitrogen rejection unit ・ Nitrogen rule ・ Nitrogen tribromide ・ Nitrogen trichloride ・ Nitrogen trifluoride ・ Nitrogen triiodide ・ Nitrogen washout ・ Nitrogen-13 ・ Nitrogen-15 nuclear magnetic resonance spectroscopy ・ Nitrogen-vacancy center ・ Nitrogenase ・ Nitrogenase (flavodoxin) ・ Nitrogenous base ・ Nitrogen–phosphorus detector ・ Nitroglycerin ・ Nitroguanidine ・ Nitroimidazole ・ Nitrome ・ Nitromemantine ・ Nitromersol ・ Nitromethane ・ Nitromethane (data page) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nitrogen-13 ： ウィキペディア英語版 Nitrogen-13 Nitrogen-13 is a radioisotope of nitrogen used in positron emission tomography (PET). It has a half life of a little under ten minutes, so it must be made at the PET site. A cyclotron may be used for this purpose. Nitrogen-13 is used to tag ammonia molecules for PET myocardial perfusion imaging. ==Production== :H1 + O16 → N13 + He4 The proton must be accelerated to a kinetic energy of about 5.55 Mev or a little more. The reaction is endothermic (i.e. the mass of the products is greater than the reactants, so energy needs to be supplied which is converted to mass).This is one reason why the proton needs to carry extra energy to produce the nuclear reaction. The energy difference is actually 5.22 MeV, but if the proton only supplied this energy the reactants would be formed with no kinetic energy. As momentum must be conserved, the true energy that needs to be supplied by the proton is given by: :$K\; =(1+m/M)\; |E|$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nitrogen-13」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.