Local Hydrogen Vibration in Crystalline and Amorphous Zirconium-Nickel Hydrides

application/pdfThe energy eigenvalues of the localized hydrogen vibration modes in both crystalline and amorphous zirconium-nickel hydrides are determined by means of the TOF neutron inelastic scattering experiment. A giant peak with maximum at 114 meV is observed for crystalline ZrNiH_. The spectrum of amorphous ZrNiH_ shows a very broad peak with maximum at 113 meV ; the FWHM is about 100 meV, which is almost double of that for the crystalline specimen. The broad peak for the amorphous hydride is found to split apparently rather than for the crystal.紀要類(bulletin)355521 bytesdepartmental bulletin pape

Histopathological evaluation of gastric mucosal environments in peptic ulcer using the endoscopic 5-point gastric biopsy method.

Although a strong association has been established between chronic Helicobacter pylori infection and peptic ulcers, the role of H. pylori is not necessarily causative because there are many patients infected with H. pylori who do not develop peptic ulcer. Therefore, we studied the relationship between the gastric mucosal environment and the development of peptic ulcers. We examined 165 endoscopic biopsy specimens from the gastric mucosa of 33 patients with peptic ulcers using the 5-point gastric biopsy method. The follow-up biopsies done within 3 weeks were well correlated with the first biopsy samples. We also reviewed the clinicohistopathological findings of 2250 endoscopic biopsy specimens from 450 patients with active gastric and/or duodenal ulcers. Over 90% of the patients with duodenal ulcer, with or without gastric ulcer, had no fundic gland atrophy, and a high incidence of intestinal metaplasia and pyloric mucosal atrophy was found in the patients with gastric ulcer. These findings suggest that patients with concomitant active gastric and duodenal ulcers exhibit severe atrophic changes in the antral mucosa but not in the fundic mucosa.</p