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Negative Muon Capture on Nitrogen Oxide Molecules
Kazuhiko Ninomiya,Takashi U. Ito,Wataru Higemoto,Makoto Kita,Atsushi Shinohara,Takashi Nagatomo,Kenya Kubo,Patrick Strasser,Naritoshi Kawamura,Koichiro Shimomura,Yasuhiro Miyake,Taichi Miura 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.41
The characteristic muonic X-ray measuring system for low pressure gas sample was constructed to investigate the initial process of muonic atom formation. Low background characteristic muonic X-ray spectra were obtained for neon (1.0 bar) and nitrogen mono-oxide samples (0.99 bar) by muon irradiation with 19 MeV/c. The deviation of characteristic muonic X-ray intensity patterns both for muonic nitrogen and oxygen atoms in nitrogen mono-oxide sample between our low pressure experiment and the previous high pressure experiment was found. Muon capture probability was also determined and compared with the previous work and empirical estimations.
( Yusuke Niina ),( Nao Fujimori ),( Taichi Nakamura ),( Hisato Igarashi ),( Takamasa Oono ),( Kazuhiko Nakamura ),( Masaki Kato ),( Robert T. Jensen ),( Tetsuhide Ito ),( Ryoichi Takayanagi ) The Editorial Office of Gut and Liver 2012 Gut and Liver Vol.6 No.3
Multiple endocrine neoplasia type 1 (MEN1) is an inherited autosomal dominant disease presenting with pancreatic neuroendocrine tumors (pNETs), parathyroid tumors, or pitu-itary tumors. Using the PubMed database, we reviewed the literature on information regarding the proper diagnosis and treatment of MEN1-associated pNET. Many cases of MEN1-associated pNET are functioning pNETs. Gastrinomas and insulinomas tend to occur frequently in the duodenum and pancreas, respectively. In addition to diagnostic imaging, the selective arterial secretagogue injection test (SASI test) is useful for localizing functioning pNET. The standard treat-ment is surgical resection. However, in the case of a func-tioning pNET, the tumor should first be accurately located using the SASI test before an appropriate surgical method is selected. In cases of a MEN1-associated non-functioning pNET that exceeds 2 cm in diameter, the incidence of distant metastasis is significantly increased, and surgery is recom-mended. In cases of unresectable pNET, a somatostatin analog has been shown to demonstrate antitumor effects and is considered to be a promising treatment. In addition, molecular-targeted drugs have recently been found to be ef-fective in phase III clinical trials. (Gut Liver 2012;6:287-294)