http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
과황산나트륨 산화에 의한 토양내 저휘발성 유기오염물 제거 시 온도의 영향 평가
정권,김도군,한대성,고석오,Jeong, Kwon,Kim, Do-Gun,Han, Dai-Sung,Ko, Seok-Oh 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.2
Batch tests were carried out to evaluate the thermal treatment of low volatile organic compounds in low-permeability soil. The chemical oxidation by sodium persulfate catalyzed by heat and Fe (II) was evaluated. Enhanced persulfate oxidation of n-decane (C-10), n-dodecane (C-12), n-tetradecane (C-14), n-hexadecane (C-16), and phenanthrene was observed with thermal catalyst, indicating increased sulfate radical production. Slight enhancement of the pollutants oxidation was observed when initial sodium persulfate concentration increased from 5 to 50 g/L. However, the removal efficiency greatly decreased as soil/water ratio increased. It indicates that mass transfer of the pollutants as well as the contact between the pollutants and sulfate radical were inhibited in the presence of solids. In addition, more pollutants can be adsorbed on soil particles and soil oxidant demand increased when soil/water ratio becomes higher. The oxidation of the pollutants was significantly improved when catalyzed by Fe(II). The sodium persulfate consumption increased at the same time because the residual Fe(II) acts as the sulfate radical scavenger.
반복적인 의식변화와 운동실조를 주소로 진단된 지발형 Ornithine Transcarbamylase Deficiency 1례
정권,김은영,김경심,김용욱,유한욱,Jung, Kwon,Kim, Eun Young,Kim, Kyoung Sim,Kim, Yong Wook,Yoo, Han Wook 대한유전성대사질환학회 2003 대한유전성대사질환학회지 Vol.3 No.1
저자들은 반복적이며 간헐적인 기면, 정신착란과 운동실조를 주소로 내원한 6세 여아에서, 고암모니아혈증과 혈장 glutamine, 요 orotic acid의 증가를 보여 지발형 OTC 결핍증으로 진단하고, 분자유전학적 검사상 exon 6에서 221번째 아미노산 lysine에 해당하는 염기 AAG가 AAT(asparagine)로 치환된 돌연변이를 이형접합자(heterozygote)로 보인하였던 1례를 경험하였기에 보고하는 바이다. Ornithine transcarbamylase(OTC) deficiency is the most common of all the urea cycle disorders. In this X-linked disorder, the hemizygote males are more severely affected than heterozygote females. The Heterozygote female may have mild episodic hyperammonemia symptoms in late infancy or childhood(late onset) or no clinical manifestations. Here we report a 6 year-old girl with late onset OTC deficiency who showed recurrent episodic lethargy, mental confusion and ataxia. On mutation analysis using DNA sequencing after PCR amplification of the 10 exons of OTC gene, G to T transversion in codon 221, causing substitution of asparagine for lysine was detected in exon 6.
정권,김도군,고석오 대한토목학회 2017 KSCE Journal of Civil Engineering Vol.21 No.1
Natural Organic Matter (NOM) and Effluent Organic Matter (EfOM) have been regarded as the major membrane foulants in advanced water treatment or wastewater reuse processes. In this study, the adsorption of Suwannee River NOM (SRNOM) and EfOM from a wastewater treatment plant by Carbon-Based Nanomaterials (CBNs) including Single-Wall Carbon Nanotube (SWCNT), Multi-wall Carbon Nanotube (MWCNT) and Expanded Graphite (EG) was investigated to mitigate their membrane fouling potentials. Adsorption of SRNOM and EfOM showed Langmuir type adsorption with constant adsorption enthalpy, regardless of the adsorbents. MWCNT showed the highest adsorption capacity for SRNOM and EfOM, while SWCNT showed the greatest reduction in Soluble Microbial Products (SMP) in EfOM. The UV/Vis spectrophotometry, fluorescence spectrophotometry, and size exclusion chromatography showed that high molecular weight fraction of SRNOM and EfOM was preferentially adsorbed onto ordered CBNs such as SWCNT, MWCNT, and EG. It was also evidenced that SMP adsorptions by SWCNT was significantly higher than those by MWCNT. The results imply that a pretreatment with SWCNT or EG can reduce membrane fouling via adsorption of SMP and high molecular weight organic fractions in EfOM.
Value Systems and Adaptation: A Typology of North Korean Defectors
정권,스테판해가드,최창용 통일연구원 2019 International journal of korean unification studie Vol.28 No.2
The total number of North Korean defectors living in South Korea topped 33,247 in 2019. Yet research finds that many are experiencing difficulties adapting to South Korean society. This study, based on a survey of 1,010 defectors, outlines a new typology of the value systems of North Korean defectors. Using a combination of factor and cluster analysis, we identify five major groups of North Korean defectors: (1) nation-oriented authoritarians, (2) community-oriented materialists, (3) family-oriented traditionalists, (4) conservative entrepreneurs, and (5) individualist conservatives. We show that value orientations are associated with distinctive political views and have demonstrable effects on adaptation and life satisfaction levels, with conservative entrepreneurs faring best. Although all groups adapt reasonably well to operating in a very different political and economic system and in their personal lives, defectors report significant problems at the social level, particularly in the form of discrimination. These findings suggest that more ‘customized policy’ be developed and implemented for North Korean defectors which ultimately helps them adjust more smoothly to South Korean society.