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DEPENDENCE OF FRETTING WEAR ON AMBIENT PRESSURE
Asanome Shizu,Iwabuchi, Akira,Shimizu, Tomoharu ENGINEERING TRIBOLOGY RESEARCH INSTITUTE KYUNGPOOK 1998 INTERNATIONAL SYMPOSIUM ON HIGH PERFORMANCE OF TRI Vol.1998 No.-
In this paper the dependence of ambient pressure on the friction and wear of SUS304 stainless steel during fretting at room temperature was investigated. The ambient pressure was varied from 10 to 10 Pa. The experiment was carried out under the following conditions; normal loads of 0.6, 1.0 and 1.8 N, slip amplitudes of 10, 50, and 100 μm, a frequency of 10 Hz and the number of fretting cycles of 105. The friction and wear behaviors were affected by the pressure. In order to examine the formation and separation/removal of the compacted oxide layer in detail, the experiment was carried out in which ambient pressure was changed alternately from 10 Pa to 10 Pa during frettiong. From the change in coefficient of friction, it was found that the removal and formation rates of the oxide were more affected by normal load than slip amplotude, and more changeble at light load than those at higher load.
Kita, Yasuyuki,Tohma, Hirofumi,Hatanaka, Kenji,Takada, Takeshi,Fujita, Shigekazu,Mitoh, Shizue,Sakurai, Hiromu,Oka, Shigenori 梨花女子大學校 藥學硏究所 1994 藥學硏究論文集 Vol.- No.4
A novel hypervalent iodine induced nucleophilic substitution of para-substituted phenol ethers in the presence of a variety of nucleophiles is described. UV and ESR spectroscopic studies indicate that this reaction proceeds via cation radicals, 〔ArH^+〕, as reactive intermediates generated by single-electron transfer (SET) from a charge-transfer(CT) complex of phenol ethers with phenyliodine(III) bis(trifluoroacetate) (PIFA). This is the first case that involves a radical intermediate on hypervalent iodine oxidations of aromatic compounds.
Endoscopic Evaluation of Adenoids: Reproducibility Analysis of Current Methods
Murilo Fernando Neuppmann Feres,Juliana Sato Hermann,Ana Carolina Sallum,Shirley Shizue Nagata Pignatari 대한이비인후과학회 2013 Clinical and Experimental Otorhinolaryngology Vol.6 No.1
Objectives. To investigate intra- and interexaminers’ reproducibility of usual adenoid hypertrophy assessment methods, according to nasofiberendoscopic examination. Methods. Forty children of both sexes, ages ranging between 4 and 14 years, presenting with nasal obstruction and oral breathing suspected to be caused by adenoid hypertrophy, were enrolled in this study. Patients were evaluated by nasofiberendoscopy, and records were referred to and evaluated by two experienced otolaryngologists. Examiners analysed the records according to different evaluation methods; i.e., estimated, and measured percentage of choanal occlusion; as well as subjective and objective classificatory systems of adenoid hypertrophy. Results. Data disclosed excellent intraexaminer reproducibility for both estimated and measured choanal occlusion. Interexaminers analysis revealed lower reproducibility rates of estimated in relation to measured choanal occlusion. Measured choanal occlusion also demonstrated less agreement among evaluations made through the right and left sides of the nasal cavity. Alternatively, intra- and interexaminers reliability analysis revealed higher agreement for subjective than objective classificatory system. Besides, subjective method demonstrated higher agreement than the objective classificatory system, when opposite sides were compared. Conclusion. Our results suggest that measured is superior to estimated percentage of choanal occlusion, particularly if employed bilaterally, diminishing the lack of agreement between sides. When adenoid categorization is used instead, the authors recommend subjective rather than objective classificatory system of adenoid hypertrophy.