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산성광산배수 (AMD) 처리 부산물 ochre의 특성과 활용
정중환(Jung-Hwan Jeong),김호진(Ho-Jin Kim),김영남(Young-Nam Kim),남광수(Kwang-Soo Nam),김계훈(Kye-Hoon Kim) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.3
This study was carried out to find out potential use of ochre as an agent to reduce phosphorus content in water. Ochre is a by-product from treatment of acid mine drainage (AMD) which is composed mostly of Fe₂O₃, Fe₂O₃ ? H₂O, FeO ? OH and Fe(OH)₃. Three ochre samples (ochre-H, ochre-D and ochre-S) were collected from three treatment facilities in Gangwon province. Physico-chemical characteristics of three ochre samples including pH, electrical conductivity, total phosphorus, available phosphorus, particle size distribution were analyzed. Scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis were also carried out. In addition, experiments for phosphorus removal from water was performed. Calcium content of ochre-H was higher than that of ochre-D and ochre-S, whereas iron content of ochre-H was lower than that of ochre-D and ochre-S. All the phosphorus in water up to maximum 191,411 mg kg<SUP>-1</SUP> per unit mass of ochre was removed with ochre-H. Ochre has immense potential as an agent to reduce phosphorus content in water.
COVID-19 기간 동안 보건진료소를 이용하는 마을 주민의 미충족 보건의료서비스 이용 경험: 앤더슨 행동모델을 기반으로 한 혼합연구
하영미,김영남,최현경,양승경,고영숙,정미라,이지선,최영미,신은지,김윤경,이고운,정애리,장지희,김다은,김경희,신소영,박송란,임은실 한국농촌간호학회 2023 한국농촌간호학회지 Vol.18 No.2
Purpose: The purpose of the study quantitatively investigates the experience of unmet healthcare service utilization by rural populations in vulnerable areas during the COVID-19 pandemic based on Andersen’s behavior model. At the same time, this study attempts to describe the experiences of unmet healthcare service utilization among participants in vulnerable rural areas by analyzing qualitative contents through open-ended question. Methods: Data were collected from October to November 2022 using Qualtrix, a web-based survey platform. A total of 863 participants completed an online survey. Quantitative data were analyzed using chi-square test and logistic regression analysis. Qualitative data were analyzed using content analysis. Results: The factors affecting participants’ unmet healthcare service utilization were type of residential area and underlying disease. The qualitative analysis identified; four categories and nine sub-categories. Conclusion: Based on these findings, it is necessary to develop a disaster nursing response model according to the type of residential areas and the number of people.
홍관수,이규홍,정재준,고의관,김미현,신형선,김영남,이수형 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
Iron-oxide-based nanoparticles have been used as MRI contrast agents because of their T₂ and T*₂shortening effect properties. Recently, we developed a material consisting of magnetic and fluorescent silica-coated nano-particles (MFSNs) that incorporated rhodamine isothiocyanate (RITC). A commercial and conventional T2 contrast agent is coated with a hydrophilic polymer, like dextran or carboxymethyl dextran, to reduce bio-toxicity and to increase biocompatibility. In contrast, our MFSN is surface-modied with silica and polyethyleneglycol (PEG) to make it biocompatible and water-soluble. The MFSN has multi-modal magnetic and fluorescent properties. Therefore it can be used in confocal imaging, as well as magnetic resonance imaging (MRI). Various applications of this useful material in the biological and medical elds are strongly expected. For such applications, various physical and biological properties, like size, T2 relaxivity (r2) and blood half-life (T1=2), have to be studied in advance. In the present study, a transmission electron microscope (TEM) was used to measure the characteristics of MFSN. The average size of the MFSN particles is about 70 nm and the MFSN is categorized as a superparamagnetic iron oxide (SPIO). The r2 is ∽130 mM-1s-1 measured by using nuclear magnetic resonance (NMR) spin-spin relaxation, was much longer than for conventional SPIO agents as a result of PEGylation. This study is the first report of a ''long circulating SPIO" with a big hydrophilic size and a long blood half-life. In conclusion, MFSN, with its property of long circulation, may be a good agent for macrophage imaging at a specific inflammation site, for tumor imaging and for cellular labeling. Iron-oxide-based nanoparticles have been used as MRI contrast agents because of their T₂ and T*₂shortening effect properties. Recently, we developed a material consisting of magnetic and fluorescent silica-coated nano-particles (MFSNs) that incorporated rhodamine isothiocyanate (RITC). A commercial and conventional T2 contrast agent is coated with a hydrophilic polymer, like dextran or carboxymethyl dextran, to reduce bio-toxicity and to increase biocompatibility. In contrast, our MFSN is surface-modied with silica and polyethyleneglycol (PEG) to make it biocompatible and water-soluble. The MFSN has multi-modal magnetic and fluorescent properties. Therefore it can be used in confocal imaging, as well as magnetic resonance imaging (MRI). Various applications of this useful material in the biological and medical elds are strongly expected. For such applications, various physical and biological properties, like size, T2 relaxivity (r2) and blood half-life (T1=2), have to be studied in advance. In the present study, a transmission electron microscope (TEM) was used to measure the characteristics of MFSN. The average size of the MFSN particles is about 70 nm and the MFSN is categorized as a superparamagnetic iron oxide (SPIO). The r2 is ∽130 mM-1s-1 measured by using nuclear magnetic resonance (NMR) spin-spin relaxation, was much longer than for conventional SPIO agents as a result of PEGylation. This study is the first report of a ''long circulating SPIO" with a big hydrophilic size and a long blood half-life. In conclusion, MFSN, with its property of long circulation, may be a good agent for macrophage imaging at a specific inflammation site, for tumor imaging and for cellular labeling.
구연 1 : 어린이병원의 혈액 폐기율 감소 및 수혈 시스템 개선
김동찬,정서현,신현주,김영남,한소영,김장언,정미라,설정옥,김숙자,이미숙,강현숙,김주희,이수희,심미선,손인숙,최윤진,임장미,이유경,김희수,박경덕,이지원 대한임상병리사협회 2011 임상수혈검사학회 발표자료집 Vol.2011 No.-
사업의 배경 : 서울대학교병원의 2009년 "혈액 반납 및 폐기율 조사"에 따르면 어린이병원 수술실의 혈액 전량 폐기율은 13.4%(602건)로 본원 수술실 4.7%(1334건)에 비해 약3배 높다. 어린이병원 수술실 혈액 폐기건수 602건은 2009년 어린이병원 전체 폐기혈액730건의 약 82.5%를 차지하는 많은 양이다. 또한 어린이병원은 소아환자의 경우에도 성인과 동일한 양의 혈액제제를 공급하고 있기때문에 체중이 작은 소아환자에게 적은 용량의 혈액을 투여하고 난 후 이 때 남은 혈액은 잔량폐기하고 있었다. 2009년 4월~2010년 3월까지 이미 부분적으로 분할수혈을 하고 있는 NICU를 제외하더라도 RBC 약 1000단위가 잔량 폐기되고 있는 실정이었다. 조혈모세포이식 환자의 경우 바뀐 혈액형 정보가 과도기에 현 EMR 프로그램에서는 반영되고 있지 않아 수혈안전사고의 위험이 있었다. 활동의 효과 : 소아 수술실의 혈액폐기율은 13.5%에서 4.6%로 감소를 보였고, 이로 인하여 어린이병원 전체의 혈액 폐기율은 2009년 4.0%에서 2010년 2.3분기 6개월간 1.8%로 감소하였다. 이를 비용으로 환산하면 약 18,000,000원의 절감효과가 있다고 볼 수 있고혈액 약 397unit이다. 잔량폐기를 줄이기 위한 분할수혈 시스템 구축으로 10kg 이하 환자에서 RBC 혈액을 분할수혈하는 경우 2009년 4월 ~ 2010년 3월 12개월간의 10kg이하잔량폐기 969건을 폐기하지 않았다고 가정했을 때 43,000,000원의 비용절감 효과가 있다고 볼 수 있다. 결론 : 본 QA 활동을 통하여 어린이병원 전체 혈액 폐기율을 2009년 4.0%에서 2010년 4월~9월 1.8%로 전년대비 약 54%의 감소율을 달성하였다. 그리고 분할수혈의 개념을 확대하여 남은 분할혈액을 타환자가 사용할 수 있게 됨으로써 잔량폐기 감소에 커다란 공헌을 하였다. 전량과 잔량폐기 감소로 인하여 년간 약 6,000만원의 비용절감 효과를 기대할 수 있다. 또한 혈액량으로 계산하면 전량 폐기 감소량 397unit, 잔량폐기 감소량969unit를 합하면 약 1400unit를 폐기하지 않게 되었다. 이는 혈액자원이 풍족하지 않는 우리나라 현실에서 많은 고귀한 혈액자원을 낭비하지 않았다는 데 있어서 본 QA팀은 커다란 성과를 거두었다고 사료된다..
코로나19 기간 동안 보건진료전담공무원의 직무스트레스와 소진의 관계: 혼합연구방법
하영미(Ha,Yeongmi),임은실(Yim,Eun Shil),김영남(Kim,Youngnam),최현경(Choi,Hyunkyoung),고영숙(Ko,Young-suk),정미라(Jung,Mira),이지선(Yi,Jee-Seon),최영미(Choi,Youngmi),신은지(Shin,Eun Ji),김윤경(Kim,Younkyoung),이고운(Lee,Kowoon),정애리(Ju 한국농촌간호학회 2024 한국농촌간호학회지 Vol.19 No.1
Purpose: This study investigates the relationship between job stress and burnout among primary healthcare practitioners during COVID-19 pandemic through mixed methods study. Methods: Data were collected from October to November 2022 using Qualtrix, a web-based survey platform. 1,082 primary health care practitioners participated in the survey. Quantitative data were analyzed using correlation analysis using IBM SPSS/WIN 27.0. Qualitative data were analyzed using content analysis through open-ended questions. Results: Job stress and burnout among primary healthcare practitioners during COVID-19 were positively correlated. Four categories and seven subcategories were identified. Conclusion: Based on these findings, it is necessary to develop a support system for primary healthcare practitioners according to the type of residential area and the number of peopleto reduce job stress and burnout.