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이현경,박정임,Lee, Hyeongyeong,Park, Jeongim 한국산업보건학회 2017 한국산업보건학회지 Vol.27 No.3
Objectives: This study aims to investigate the occupational radiation exposures of emergency medical technicians(EMTs) in emergency medical centers in Korea. The results will provide a basis for developing prevention programs to minimize adverse health effects relating to radiation exposure among emergency medical technicians working in this area. Methods: Radiation exposure doses were measured for twenty-two EMTs working in six emergency medical centers. Thermo Luminescent Dosimeters(TLD) were placed on three representative body parts, including chest, neck, and a finger. Measurements were conducted over the entire working hours of the participants for foor weeks. Dosimeters were analyzed according to a standard method by a KFDA-designated lab. Detection rate, annual radiation exposure dose, and relative levels to dose limit were derived based on the measured doses from the dosimeters. SPSS/Win 18.0 software(IBM, US) was used for statistical analysis. Results: Detection rates were 45.5%, 36.4%, and 45.5% for the dosimeters sampled from chest, neck, and a finger, respectively. The average annual doses were $2.39{\pm}3.44mSv/year$(range 0.38-10.0 mSv/year) for the chest, $2.72{\pm}3.05mSv/year$(2.00-11.34) for the neck, and $20.98{\pm}17.57mSv/year$(1.25-53.50) for the hand dose. The average annual eye dose was estimated to $3.61{\pm}2.37mSv/year$(1.50-8.34). The exposure dose levels of EMTs were comparable to those of radiologists, who showed relatively higher radiation dose among health care workers, as reported in another study. Conclusions: EMTs working in emergency medical centers are considered to be at risk of radiation exposure. Although the radiation exposure dose of EMTs does not exceed the dose limit, it is not negligible comparing to other professionals in health care sectors.
이현경 ( Hyeongyeong Lee ),김경수 ( Kyeongsu Kim ),최동필 ( Dongphil Choi ),최원종 ( Wounjong Choi ) 한국보건정보통계학회(구 한국보건통계학회) 2020 보건정보통계학회지 Vol.45 No.2
Objectives: The occurrence of injury causes physical and mental health problems and socioeconomic losses. Identifying the extent of injury to farmers is an important basic data for preventing, treating and rehabilitating injuries to farmers. The purpose of this study was to comparison the injury rate and injury ratio by farmers and non-farmers by year, and to analyze the impact factor of injury occurrence. Methods: The data sources used in this study are Community Health Survey as national accreditation statistics. The annual injury rates were estimated for farmers and non-farmers aged 19 or older in the past year occurred during daily life and work. The annual injury rates of farmers and non-farmers were weighted according to the guidelines for using raw data. The analysis method was frequency and percent analysis, weighted fraction (%), standard error (SE), chi-square, logistic regression. Results: The annual injury rate of farmers was 8.6% (odds ratio, OR=1.14, 95% confidence interval, 95% CI=1.04-1.24) in 2013, 5.9% (OR=1.24, 95% CI=1.13- 1.36) in 2014, 9.1% (OR=1.23, 95% CI=1.14-1.33) in 2015, 9.5% (OR=1.23, 95% CI=1.14-1.33) in 2016, 8.9% (OR=1.33, 95% CI=1.23-1.44) in 2017. The annual injury rate of non-farmers was 6.9% in 2013, 4.9% in 2014, 7.6% in 2015, 7.9% in 2016, 6.6% in 2017. Conclusions: The annual injury rate of farmers was higher than non-farmers. The annual rate of injury for farmers is about 1.2 times higher than non-farmers each year. For farmers at high risk of injury, safety education related to injury prevention is continuously needed.
한국 농업인을 위한 응급 구급함 응급처치 가이드북의 개발
박수인(Sooin Park),이현경(Hyeongyeong Lee),채혜선(Hyeseon Chae),김승연(Seoungyeon Kim),김인수(Insoo Kim) 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.11
본 연구는 한국 농업인의 안전재해에 특화한 응급 구급함 응급처치 가이드북 개발을 목적으로 수행하였다. 농촌은 농작업 안전사고 발생 시 의료기관과 공간적 거리로 인해 신속한 전문 치료에는 한계가 있다. 이에 손상사고의 경우 신속한 현장 응급처치와 이를 도울 수 있는 가이드북은 중요한 요소이다. 이를 위해 한국 농업인의 업무상 손상 통계 자료와 국내외 응급처치 가이드 적용 사례 검토 등을 통해 응급처치 방법 및 콘텐츠를 구성하였다. 그리고 효과적인 정보전달을 위해 일러스트, 픽토그램, QR코드, 웹 기반 동영상을 제작하였고, 이를 적용한 책자를 개발하였다. This study aimed to develop a first aid kit guidebook for agricultural accidents in Korea. When safety-related accidents occur, prompt professional treatment is difficult in rural areas due to spatial distances from medical institutions. Therefore, in the case of an accident, prompt on-site first aid is required, and a guidebook that can help ensure appropriate treatment is important. To this end, the contents of such a guidebook, including first aid methods, were organized by reviewing statistical data on occupational accidents involving Korean farmers and application cases of first aid guides in Korea and abroad. In addition, illustrations, pictograms, QR codes, and web-based videos were produced to ensure effective information delivery and were applied to and developed in a booklet.
레티노익산이 접목된 폴리아미노산 유도체의 자기조립 현상
한사라 ( Sa Ra Han ),이현경 ( Hyeongyeong Lee ),김희진 ( Hee-jin Kim ),조윤나 ( Yoon Na Cho ),이승준 ( Seung-jun Lee ),조춘구 ( Choon-koo Zhoh ),정재현 ( Jae Hyun Jeong ) 대한화장품학회 2016 대한화장품학회지 Vol.42 No.4
본 연구에서는 수용액상에서 자기조립 나노입자를 형성할 수 있는 레티노익산이 접목된 양친성 폴리아미노산 유도체를 합성하였다. 합성한 양친성 폴리아미노산은 레티노익산의 접목도가 각각 5, 10, 30 mol%가 되도록 조절하였다. 수용액 상에서 양친성 폴리아미노산은 소수성 레티노익산의 분자 결합에 의해 안정한 자기조립 나노입자를 형성하였다. 자기조립 나노입자는 레티노익산의 접목도가 증가할수록 크기는 작아지고 형태는 구형에서 이중층 구조로 전이되었다. 또한 접목도가 10%일 때, 자기조립 입자의 구조 붕괴 없이 레티놀의 포집 및 전달이 가장 효과적인 것을 확인하였다. 접목도가 제어된 자기조립입자는 레티놀을 안정적으로 포집할 수 있기 때문에 주름개선제 및 다양한 기능성 화장품 전달체로 활용될 수 있다. In this study, a poly (amino acid)s derivative grafted with retinoic acids, which could form self-assemblies in an aqueous solution, was successfully synthesized. The synthesized amphiphilic poly (amino acid)s were controlled with 5, 10, 30 mol% substitution of retinoic acid. Then, the amphiphilic poly (amino acid)s were self-assembled by inter/intra molecular stacking of retinoic acids in an aqueous solution. Also, the increasing the degree of substitution (DS) of retinoic acids decreased the size of self-assembled nanoparticles and induced structural transition to bilayer structure from spherical structure. The retinol was stably encapsulated into a core of self-assembled nanoparticle with 10 mol% of DS. This strategy to prepare the self-assemblies of amphiphilic polyaspartamide will serve to improve the efficiency of targeted delivery for a functional cosmetic with various biological modalities.
구강 미생물 7종에 대한 멘톨과 불소치약의 항균 활성 비교 연구
조세희(Cho, Sehee),안태규(Ahn, Tae-Kyu),윤찬건(Yun, Chan-Gun),김지우(Kim, Jiwoo),전예담(Jeon, Yedam),황진서(Hwang, Jinseo),김지인(Kim, Jee-In),이현경(Lee, Hyeongyeong),임재환(Lim, Jae-Hwan) 한국과학영재교육학회 2020 과학영재교육 Vol.12 No.3
구강에는 600종 이상의 미생물이 존재하는 것으로 보고되고 있다. 알코올과 항생제 제품을 대체하여 천연물을 사용한 구강 위생 제제의 개발연구가 보고되고 있으나, 특정 성분들의 균주별 항균 활성 등에 관한 연구는 부족하다. 본 연구에서는 멘톨, 녹차 추출물, 불소치약, 플루오린화나트륨을 사용하여 구강 미생물 7종 -S. mutans, E. coli, B. subtilis, S. aureus, B. cereus, P. aeruginosa, L. brevis- 에 대한 항균효능을 확인하고자 하였다. 디스크 확산법을 통해 멘톨(200 mg/mL)은 구강 미생물 7종, 치약의 경우는 2종의 균주 -S. mutans, B. cereus- 에서 10.4~ 21.9 mm의 clear zone이 형성되는 것을 확인하였다. 불소치약과 멘톨의 복합 처리 시에는 구강 미생물 4종에서 증가된 항균 활성을 확인하였다. 또한 MIC 분석을 통해, 멘톨은 200~500 ㎍/mL의 농도에서 모든 균주에 대한 최소억제농도를 확인할 수 있었고 플루오린화나트륨의 경우 E. coli에서 40 ㎍/mL의 억제농도를 확인할 수 있었다. 결과적으로, 구강청결제 및 구강질환 항생물질의 대체소재로서 멘톨의 활용 가능성을 제시하고자 한다. More than 600 kinds of microorganisms exist in the oral cavity. Studies on the development of oral hygiene preparations using natural products as a substitute for alcohol and antibiotic products have been reported, but studies on the antibacterial activity of specific ingredients by strain are insufficient. In this study, menthol, green tea extract, fluoride toothpaste, and sodium fluoride were used against 7 kinds of oral microorganisms, S. mutans, E. coli, B. subtilis, S. aureus, B. cereus, P. aeruginosa, L. brevis. Using the disk diffusion method, It was confirmed that clear zones of 10.4 to 21.9 mm are formed in 7 types of oral microorganisms when menthol (200 mg/mL) is treated and 2 strains, S. mutans and B. cereus, when treated with fluoride toothpaste. When combined treatment with fluoride toothpaste and menthol, increased antibacterial activity was observed in four oral microbes. Through the MIC analysis, the minimum inhibitory concentration of menthol for all strains was confirmed at a concentration of 200-500 ㎍/mL, and the inhibitory concentration of sodium fluoride was confirmed at 40 ㎍/mL in E. coli. As a result, we suggest that the possibility of using menthol as a substitute for oral cleansers and antibiotics for oral diseases.