• Title/Summary/Keyword: 방사선멸균

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Sterilization Effect by the Nd:YAG Laser pulse (Nd:YAG 레이저 펄스에 따른 멸균효과)

  • Jeong, Kyeonghwan;Jung, Dongkyung;Park, Jeongkyu;Choi, Hyeonwoo;Seo, Jeongmin
    • Journal of the Korean Society of Radiology
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    • v.14 no.5
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    • pp.695-703
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    • 2020
  • The use of medical devices is increasing due to the development of medical technology. Among medical devices, it is often used in the human body for graft and treatment. Therefore, in medical institutions, various sterilization methods according to the type and material of medical devices are applied to prevent infection. Hydrophosphite (HA) materials are the most popular in bone grafts. We would like to present a sterilization method using Q-switch Nd:YAG laser with high output energy among non-ionizing radiation suitable for small medical devices. In this study, sterilization power was most ideally shown at UV wavelengths of 1.5 W, 266 nm, and 10 pulses. Different wavelength bands; infrared and visible light; showed passive sterilization, and ultraviolet A and C showed differences in sterilization according to the pulse. In laser sterilization were differences that found according to the wavelength bands and pulses.

어류양식용 사료의 위생화. I. 어류유래 병원성 세균에 대한 방사선 조사의 효과

  • 김세라;이종환;조성기;변명우;김성호
    • Proceedings of the Korean Society of Veterinary Pathology Conference
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    • 2001.09a
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    • pp.23-23
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    • 2001
  • 대표적인 어류질병의 원인이 되는 주요 병원성 미생물인 에드워드균(Edwardsiella tarda), 비브리오균(Vibrio anguillarum), 연쇄구균(Streptococcus faecalis)의 방사선 감수성을 파악하고, 주요 생어사료재료 3종(고등어, 전어, 새우) 및 배합사료 1종을 대상으로 일반세균의 방사선 멸균 효과 및 생어사료에 병원성 세균을 인위적으로 오염시킨 후 방사선 조사에 의한 멸균 효과를 파악하였다. (중략)

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Sterilization Effect of Microbial Strains by using Non-ionizing Radiation (비전리방사선을 이용한 미생물 균주 멸균효과)

  • Jeong, Kyeonghwan;Seo, Jeongmin
    • Journal of the Korean Society of Radiology
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    • v.14 no.6
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    • pp.833-839
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    • 2020
  • Globally, infection prevention and social awareness have been greatly changed by the severe acute respiratory syndrome coronavirus, and as a result, the infection control guidelines and procedures for patients with high exposure to hospital-acquired infection are further strengthened and management and monitoring are more thorough. In order to prevent infection, sterilization should be carried out with the highest priority, and we will find a sterilization method that is low in cost, easy to install, and easy to operate, to present appropriate sterilization effects. In this study, the UV sterilizer was used to contaminate the caries bacteria with an output of 4 W and irradiation time of 60, 150, and 300 sec, and the laser was irradiated with outputs of 0.8 and 1.5 W at wavelengths of 266 and 355 nm, respectively. Ultraviolet sterilizer showed safety in infection prevention at over 150 sec, and laser showed safety in prevention at 1.5 W, 0.8 W, and 266 nm. As a result, the higher the output and the wavelength closer to 253.7 nm, the better the sterilization effect.

Comparative Study of Sterilization by Gamma-ray and Electron-Beam (감마선, 전자선에 의한 멸균 비교분석)

  • Jeong, Kyeonghwan;Park, Changhee
    • Journal of the Korean Society of Radiology
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    • v.14 no.5
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    • pp.537-543
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    • 2020
  • The elderly population in the modern society is growing rapidly due to advance medical technology and minimally invasive surgery. Therefore, as the tendency to use medical device is increasing, pathogenic infection is a concern. Therefore, the first aim of modern medicine is infection prevention in medical place. Recently, patient implants are increasing using 3D printing. Hydroxyapatite is used as a representative material. And, there haven't had currently absorbed dose standard for sterilization of hydroxyapatite discs. Escherichia coli and Streptococcus mutans contaminated on the surface of hydroxyapatite discs were irradiated at each absorbed dose of 0, 0.5, 1.0, 3.0, 5.0 kGy using Gamma-ray of cobalt and Electron-beam of linear accelerator. Then, the number of bacteria was measured in the sample by the decimal dilution method. After sterilization, a non-parametric testing method was performed to compare the survival of Escherichia coli and Streptococcus mutans. As a result, Escherichia coli was sterilized at 1 kGy or more and Streptococcus mutans at 3 kGy or more on absorbed dose. It is considered possible to perform sterilization at a lower value than the recommended absorbed dose of radiation sterilization.

방사선 멸균의 현재와 장래

  • 한수남
    • Journal of the korean veterinary medical association
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    • v.34 no.10
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    • pp.726-730
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    • 1998
  • 우리 나라의 식품의 방사선 조사 기술 등에 대해서는 1997년도에 발간된 보건복지부의 식품 공전에 자세히 기록 되어 있으나, 특히 실험 동물 사료에 대한 정보가 불명해서 외국 <일본, 미국>에서 최근 보고를 참고로 소개 하고자 한다.

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