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We attempted to produce nanocrystalline soft magnetic powders with a high saturation magnetic flux density (Bs) and containing large-sized particles using a modified water atomization system named "HPWA/YK." Almost fully amorphous powders containing particles with median diameters of 15 μm and composed of Fe83.3Si4B8P4Cu0.7 were obtained. These results indicate that HPWA/YK reached a higher quenching rate than conventional water atomization systems. The powder circularity reached a value of 0.78 by changing the ratio of the gas to water pressure; moreover, after annealing at 713 K, the powders presented good magnetic properties (Bs = 1.66 T; Hc = 155 A/m). [ABSTRACT FROM AUTHOR]

The article describes the case of oropharyngeal and gastric syphilis that mimicked oropharyngeal cancer due to increased fluorodeoxyglucose (FDG) uptake in a 48-year-old man with oropharyngeal tumor and cervical lymphadenopathy. Topics discussed include the histological study of the oropharynx, the endoscopic screening for synchronous upper gastrointestinal cancer, and the presence of spirochetes of Treponema pallidum.