• 제목/요약/키워드: 환경방사선

검색결과 910건 처리시간 0.026초

방사선을 이용한 슬러지 탈수능 향상 및 퇴비화

  • 이재광;유대현;이병진;박치균;이면주;강호;이관형
    • 한국환경과학회:학술대회논문집
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    • 한국환경과학회 2005년도 봄 학술발표회지 제14권(제1호)
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    • pp.367-369
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    • 2005
  • 방사선 처리에 의한 슬러지의 기초 물성 변화 및 탈수율 증진에 대한 실험을 수행하였다. 또한 슬러지의 자원화를 위하여 슬러지 이용 퇴비를 제조하여 품질을 평가하였다. 방사선을 조사한 슬러지는 입자 내부에 존재하는 일부 수분이 유출되어 최종 탈수 케이크의 함유 수분이 약 7% 정도 감소하였으며, 이는 방사선 조사가 최종 슬러지 발생량을 저감시킬 수 있는 한 가지 방법임을 시사 하여준다. 슬러지를 이용한 퇴비화 실험을 통하여 방사선 처리를 한 퇴비의 품질이 비조사 퇴비에 비하여 퇴비 품질이 향상되었음을 입증하였다.

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제니스틴에 의한 방사선유발 세포사멸 민감도증가 (Sensitization of Radiation-Induced Cell Death by Genistein)

  • 김태림;김인규
    • 방사선산업학회지
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    • 제4권1호
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    • pp.91-94
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    • 2010
  • A number of epidemiological studies as well as biological experiments, showed that genistein, one of the isoflavone, prevents prostate cancer occurrence. In this study, we showed that genistein inhibited the cell proliferation of human promyeoltic leukemia HL-60 cells and induced G2/M phase arrest. In addition, combination of genistein treatment and ${\gamma}$-irradiation displayed synergistic effect in apoptotic cell death of HL-60 cells. This means that the repair of genistein-induced DNA damage was hindered by ${\gamma}$-radiation and thus cell death was increased. In conclusion, genistein is one of the important chemicals that sensitize radiation-induced cell death.

저선량과 고선량 측정구간 변환이 가능한 모바일 방사선 측정시스템 개발 및 평가 (Development and Evaluation of a Mobile Environmental Radiation Measurement System That Can Switch between Low and High Dose Measurement Sections)

  • 이홍연;한상준;김보길;이건주;김석현;김정훈
    • 대한방사선기술학회지:방사선기술과학
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    • 제45권1호
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    • pp.49-55
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    • 2022
  • This study is to develop a mobile type environmental radiation measurement system for emergency response or environmental radiation monitoring of local governments near nuclear facilities. A mobile radiation measurement system can monitor radiation by field beyond the spatial constraints of a fixed environmental radiation monitor. If installed in local government infrastructure such as public transportation, environmental radiation can be monitored without additional manpower and measurement work. In addition, it is designed to enable monitoring and measurement of radiation from low to high doses as well as the environment in preparation for radioactive disasters such as nuclear power plant accidents. It is expected that this system will be utilized not only in normal times but also in the event of a radiation accident to improve the disaster prevention capabilities of local governments.

중소 병.의원 근무환경 실태조사 (Research on the Actual Condition of Working Conditions in the Small and Medium Clinics)

  • 권대철;장명미;장윤희;정경모;곽중신
    • 대한방사선기술학회지:방사선기술과학
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    • 제28권1호
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    • pp.55-65
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    • 2005
  • 서울, 경기 지역의 중소 병 의원 회원들의 근무환경 실태를 파악하여, 국민보건증진과 무면허자의 방사선 검사업무 금지, 사기진작과 불만족해소, 직무만족도를 높여 복지와 권익을 향상, 정책 참여를 유도, 근무환경 개선에 목적이 있다. 2003년 7월부터 8월까지 271명을 대상으로 일반적 기본사항, 병실 수, 고용실태, 고용 및 업무범위, 이직빈도, 고용계약서 작성여부, 임금실태, 근무환경, 방사선사 호칭, 방사선안전관리, 품질관리, 방사선 차폐시설, 영상획득시스템, 필름시스템 종류, 장비보유현황, 방사선 피폭 방어기구, 협회와 관련된 항목을 설문 조사하였다. 근무환경, 불만족 문제점을 파악하여, 합리적이고 나은 근무환경을 제공하는 기초 자료로 활용하는데 이용하고, 근무환경 및 근무제도, 직제의 개선을 가져올 수 있도록 협회와 회원은 노력하여야한다. 주기적으로 설문조사를 실시하고 불만족을 해소하는 정책을 추진하도록 한다.

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전자선 조사된 폴리프로필렌 부직포의 그라프트에 있어 보관조건이 미치는 영향 (Effect of Storage Conditions on Graft of Polypropylene Non-woven Fabric Induced by Electron Beam)

  • 이진영;전준표;강필현
    • 방사선산업학회지
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    • 제9권2호
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    • pp.57-62
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    • 2015
  • In this study, we fabricated effect of storage conditions on graft of polypropylene (PP) non-woven fabric induced by electron beam. The electron beam irradiations on PP non-woven fabric were carried out over a range of irradiation doses from 25 to 100 kGy to make free radicals on fabric surface. The radical measurement was established by electron spin resonance (ESR) for confirming the changes of the alkyl radical and peroxy radical according to effect of storage time, storage temperature and atmosphere. It was observed that the free radicals were increased with irradiation dose and decreased with storage time due to the continuous oxidation. However, the radical extinction was significantly delayed due to reduced mobility of radicals at extremely low temperature. The degree of graft based on the analysis of ESR was investigated. The conditions of graft reaction were set at a temperature: $60^{\circ}C$, reaction time: 6 hours and styrene monomer concentration: 20 wt%.

에폭시 아크릴레이트의 전자선 영향 평가 (Characterization of Electron Beam Cured Epoxy Acrylate)

  • 신진욱;오병환;고금진;전준표;강필현
    • 방사선산업학회지
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    • 제4권3호
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    • pp.271-276
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    • 2010
  • Epoxy resin has wide application in various industrial fields because of their good mechanical strength, superiority adhesion and low shrinkage etc. And the typical curing method for epoxy resins is thermal and press compaction. However, a curing method was used electron beam process in this study. Epoxy acrylate was fabricated from mixture of epoxy, acrylic acid, tetraphenylporphyrin (TPP) and hydroquinone monomethyl ether (MEHQ) with mole ratios. Then electron beam irradiation effect on the curing of the epoxy acrylate resin was investigated various absorption dose in nitrogen atmospheres at room temperature. The dynamic mechanical and thermal properties of the irradiated epoxy acrylate resins were characterized using dynamic mechanical analysis (DMA) and thermogravimetric analyzer (TGA). And the tensile and flexural strength were measured by an universal tensile machine (UTM).