• Title/Summary/Keyword: Yeon Ju Hwan

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Survival of Erwinia amylovora on Surfaces of Materials Used in Orchards

  • Choi, Hyun Ju;Kim, Yeon Ju;Lim, Yeon-Jeong;Park, Duck Hwan
    • Research in Plant Disease
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    • v.25 no.2
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    • pp.89-93
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    • 2019

  • Fire blight disease caused by the bacterium, Erwinia amylovora, was observed in apple and pear orchards in Korea in 2015. Since then, it has spread, sometimes over long distances to other orchards. Therefore, we examined the ability of E. amylovora to survive in soils and on the surfaces of common materials such as T-shirts, wrist bands, pruning shears, and rubber boots by both conventional PCR (cPCR) and quantitative PCR (qPCR) methods. E. amylovora was detected in all materials tested in this study and survived for sufficiently long periods to cause fire blight disease in new sites. Thus, based on the results of this study, sanitation protocols must be applied to equipment during orchard work.

  • https://doi.org/10.5423/RPD.2019.25.2.89 인용 PDF KSCI HTML

Fabrication and Performance Evaluation of the Valve Actuator for Glaucoma Implant (녹내장 임플랜트용 밸브 액추에이터의 제작 및 성능 평가)

  • Bae, Byung-Hoon;Kim, Nak-Hoon;Park, Kyi-Hwan;Lee, Sang-Ho;Sim, Tae-Seok;Kim, Yong-Kweon;Lee, Yeon;Kee, Hong-Seok;Kim, Seon-Ho
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1875-1877
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    • 2001

  • Glaucoma is an eye disease which is caused by abnormal high lOP (Intra Ocular Pressure). High lOP is caused by the aqueous humor which is produced consistently but not drained due to malfunction of the trabecular system which has a role of draining the aqueous humor into the venous system. Currently, there are some methods to treat glaucoma, Among these, the use of implants is increasing in these days due to many problems In other methods. However, conventional implants are passive implants and have critical disadvantage. Therefore, it is needed to develop an active implant which is composed of a valve actuator, pressure sensor, controller, and power supply. In this paper, we make experiment with the fabricated valve actuator in In-vitro experiment, and estimate the in-vivo result using the experimental result and investigate the possibility of the fabricated valve.

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