• Journal of the Korean Society for Heat Treatment
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• v.34 no.5
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• pp.233-238
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• 2021

The mechanical, anti-tarnishing, and corrosion characteristics of Yuggi (Cu-22wt%Sn) alloy are greatly affected by fraction of constituent phases according to heat treatment method. The Yuggi heat-treated at 750℃ has a β1' phase of 98% or more, which is a high-temperature disordered beta phase, on the other hand, cast Yuggi that Sn is solid-solutioned into Cu consists with α-phase over 60v/o. This difference of constituent phases of Yuggi may cause a difference in dissolution of Cu under antimicrobial test condition. Nonetheless, few studies have been conducted on the effect of fraction of constituent phases and constituent phases in antimicrobial activity. In addition, few studies have also been conducted on the suitable method measuring the antimicrobial activity of Yuggi. Hence, the purpose of this study is to provide an optimum measurement method of antimicrobial activity, and to evaluate quantitatively the effect of constituent phases on antimicrobial activity.

• Journal of Korean Medical classics
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• v.19 no.2 s.33
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• pp.66-73
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• 2006

This study is on Yoshimasu Todo's thoughts of a real doctor and medicine. Conclusions are as below. disease-doctor[疾醫] is a doctor treating diseases by poisonous medicines. His role is different from food-doctor[食醫] who recuperates vital energy by food. Unlike food-doctor, a disease-doctor only detoxicates poisons of diseases by using poisonous medicines. Disease-doctor shall not take credit upon himself for the service of Heaven' s power. This is Yoshimasu Todo's view of a real doctor. Medicine is not an imagination, but a reality. It is the recognition of knowing what can be known and seeing what can be seen The truth of medicine is in ancient words(古語), ancient teachings[古訓] and ancient ways[古法]. To study medicine is not recklessly believing and following the contents of ancient medical texts-${\ulcorner}$Sanghanlon(傷寒論)${\lrcorner}$, ${\ulcorner}$Geumgwe-yolyag(金置要略)${\lrcorner}$,${\ulcorner}$Somun(素問)${\lrcorner}$, ${\ulcorner}$Yeongchu(靈樞)${\lrcorner}$. It is to follow the ancient ways written and left in ancient books and not to follow wrong ways fabricated by after ages. The theories of eum-yang-obaeng(陰陽五行) and o-un-yuggi(五運六氣) are useless to medicine because these are groudless ones. This is Yoshimasu Todo's view of medicine.