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Atomic-scale flattening of Ni-Cr alloy surfaces by electrochemical passivation treatments
H. Nanjo,N. J. Laycock,H. Deng,I. Ishikawa,N. Sanada 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
Ni–Cr alloys were electrochemically passivated in sulphuric acid solutions, generating atomically flat oxide surfaces on the terraces of the resulting passive films. High resolution ex-situ scanning tunnelling microscopy revealed a nanocrystalline structure for the passive film, with a tendency for the grain size to decrease with increasing Cr content in the alloy.
Nanoscale surface properties of iron treated by electrochemical and physico-chemical methods
H. Nanjo,M. Fujimura,N.J. Laycock,Z. Xia,M. Nishioka,I. Ishikawa,J. Onagawa 한국물리학회 2006 Current Applied Physics Vol.6 No.3
The nanoscale surface structure of surface oxide lms formed on pure iron treated by UV irradiation at 3 mW/cm2 and electrochem-microscopy and spectroscopic ellipsometry. UV irradiation of the air-formed lm decreased the lm thickness, surface roughness andsurface area. UV irradiation of electrochemically passivated surfaces increased the lm thickness and the terrace width of the oxide film.
DEVELOPMENT OF THE EPIDIDYMIS IN MEISHAN BOARS
Harayama, H.,Nanjo, I.,Kanda, S.,Kato, S. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.1
The developmental process of the epididymis was investigated in Meishan boars from 1 to 364 days of age. Epididymal weight increased rapidly between 45 and 150-180 days of age. The diameter and epithelial area of the epididymal ducts greatly increased up to 105-120 days of age. At 1 day of age, the central and distal cauda already had a pseudostratified epithelium surrounded by smooth muscle. At 60-75 days of age, the central and distal caput, corpus, and proximal cauda revealed a well-developed structure of the epithelium. The proximal caput showed a tall, irregular and vacuolar epithelium at 105-120 days of age. PAS-positive contents in the lumen of the caput, corpus and cauda epididymides were first detected at 60-75, 45-60 and 1-30 days of age, respectively. Moreover, in the central and distal caput, PAS-positive granules appeared at 60-75 days of age, and increased until 105-120 days. These results suggest that the epididymis develops completely by approximately 120 days of age, though its weight increases rapidly up to 150-180 days. Thus, it appears that development of the epididymis occurs at an earlier age in Meishan boars than in European and American breeds.