제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가

김호림(Ho-Rim Kim),오준섭(Junseop Oh),도현권(Hyun-Kwon Do),이경진(Kyung-Jin Lee),현익현(Ik-Hyun Hyun),오상실(Sang-Sil Oh),감상규(Sang-Kyu Kam),윤성택(Seong-Taek Yun) 대한자원환경지질학회 2018 자원환경지질 Vol.51 No.1

1993년부터 2015년까지 관측된 제주도 지하수 장기모니터링 관측정(N = 4,835)에서 수집된 지하수 수질자료(N = 21,568)를 기반으로 질산성질소의 시공간적 변동 특성을 평가하였다. 제주도 지하수의 질산성질소 농도의 중앙값은 2.5 mg/L로서 다른 국가나 대륙의 조사 결과에 비해 다소 높거나 유사한 것으로 나타났다. 또한 지하수 용도, 행정구역 및 고도 별로 유의한 차이를 보였다. 특히, 산간 지역에 비해 저지대 해안가에 위치한 농업 및 주거지역에서 농도가 높음을 확인하였다. Mann-Kendall 및 Sen’s slope 분석을 활용한 질산성질소 농도의 추세 분석 결과, 하류 저지 대에 비해 중산간지역에서의 질산성질소 농도 증가 경향이 뚜렷하였다. 제주도 내 토지 피복의 시계열 변화 특성과 결부 지어 보면, 중산간지역의 오염 증가 추세는 농업지역의 확장 등 인위적 활동 증가에 기인한 결과로 판단된다. 반면,기지정된 지하수자원특별관리구역에서는 전반적으로 질산성질소 농도의 감소 경향이 나타났는데, 이는 지하수 관리 측면에서 수질관리를 위한 적극적인 정책이 유효함을 시사한다. 본 연구에서는 제주도 지하수의 질산성질소 오염관리를 위한 적정 방안을 제안한다. The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO 3 -N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.

Differential Manifestation of Ocular Phenotypes in TALEN-mediated p19arf Knockout FVB/N and C57BL/6J mouse lines

Jin‑Sung Park,Joo‑Il Kim,Hyun‑Jin Lim,Soo‑Kyung Ryu,Euna Kwon,Kang‑Min Han,Ki‑Taek Nam,Han‑Woong Lee,Byeong‑Cheol Kang 한국유전학회 2020 Genes & Genomics Vol.42 No.9

Background p19arf, primarily known as a tumor suppressor, has also been reported to play an essential role in normal development of mouse eyes. Consistently, lack of p19arf has been associated with ocular defects, but the mixed background of the knockout (KO) mouse strain used raised a concern on the accuracy of the phenotypes observed in association with the targeted gene due to genetic heterogeneity. Object We carried out a study to investigate into the efect of genetic background on the manifestation of p19arf KO associated phenotypes. Methods We characterized the phenotypes of novel p19arf KO mouse lines generated in FVB/N and C57BL/6J using a transcription activator-like efector nuclease (TALEN) system in comparison to the reported phenotypes of three other p19arf-defcient mouse lines generated using homologous recombination. Results Ninety-fve percent of FVB/N-p19arf KO mice showed ocular opacity from week 4 after birth which worsened rapidly until week 6, while such abnormality was absent in C57BL/6J-p19arf KO mice up to the age of 26 weeks. Histopathological analysis revealed retrolental masses and dysplasia in the retinal layer in FVB/N-p19arf KO mice from week 4. Besides these, both strains developed normally from birth to week 26 without increased tumorigenesis except for a subcutaneous tumor found in a C57BL/6J-p19arf KO mouse. Conclusion Our fndings demonstrated surprisingly variable manifestation of p19arf-linked phenotypes between FVB/N and C57BL/6J mice, and furthermore between our mouse lines and the established lines, indicating a critical impact of genetic background on functional study of genes using gene targeting strategies in mice.

공고 전공동아리 활동을 통한 학생들의 외형적 성과요인과 내재적 성과요인의 관계

권현진,류창열 충남대학교 공업교육연구소 2003 論文集 Vol.26 No.1

The purpose of this study was to investigate the relationship between students' external and internal outcomes of the club activities concerning with major subjects in technical high school. 108 students were selected from 13 clubs concerning with major subjects by the purposive sampling method. Data were collected by administering the Instruments, the researchers developed for measuring the effectiveness elements. The statistical methods utilized in this study were basic descriptive statistics, factor analysis and correlation. The major findings of this study were as follows; 1) 22 effectiveness evaluation elements of the club activities concerning with major subjects were developed. The effectiveness evaluation elements were composed of 2 domains, internal outcomes and external outcomes. 2) Factor analysis generated the social and problem solving capability element for internal outcomes, and external outcome elements for external outcomes. 3) There was strong relationship between the social and problem solving capability element and external outcome elements. And correlation was relatively high between the problem solving capability element and external outcome elements. Based on the results of the study, to ultimate the effectiveness of the practical technique education in technical high school, 'creativity element' and 'technological creativity' also should be emphasized.

기관내 삽관 후 발생한 기관 괴사와 협착증 : 증례보고 A case report

권진형,구자욱,유시현 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Tracheal necrosis and stenosis are rare complications of prolonged endotracheal intubation. A 62 years old female was performed cerebral aneurysmal neck clipping under general anesthesia via endotracheal intubation and transferred to the 12th intensive care unit. The patient was mechanically ventilated and tracheostomy was done on the postoperative day. Necrotic tissue, pus and stenosis were found around the ballooning site of the trachea. T-tube insertion was done on the both postoperative day and the patient was discharged on the 80th postoperative day.

A Study on DNA Sequences and Mutation of Integrase Region of Korean-type Bovine Leukemia Virus (BLV) pol Gene

권오식,--,--,-- THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCIEN 2004 Journal of biomedical laboratory sciences Vol.10 No.1

Bovine leukemia virus (BLV) is a causative agent for lymphoma disease in cattle including cows worldwide. BLV shares similar virion structure and characteristics with other retroviruses. The pol gene of the BLV genome produced reverse transcriptase (RT) and integrase (IN) for important roles for BLV genome integration into host cell chromosomes that is known to be coded in the 3' side of the BLV pol gene (one third portion). In this study, we have sequenced 978 bp in the 3'side of the BLV pol gene from BLV 10C3 in order to determine the BLV IN region of it. And we compared it to the nucleotide sequences of an Australian BLV isolate. As a result, nucleotide sequences of the IN region of the Korean-type BLV pol gene were mutated at a rate of 3.7%. We can confirm that the typical mutations are such as Arg (AGG) → Lys(AAG), Thr (ACG) → Met (ATG), Ile (ATT) → Val (GTT), Asn (ACC) → His (CAC), Phe (TTT) → Leu (TTG) and Asn (ACC) → Asp (GAC). From the analysis of the sequencing data, we were able to determine the zinc-finger-like "HHCC" motif in the amino terminus of BLV IN, that was H-X_(3)-H-X_(25)-C-X_(2)-C. It was also found the DD35E motif in the IN catalytic domain as D-X_(56)-D-X_(35)-E. It fits very well to the consensus sequences of retroviral IN as well as HHCC motif.

임상검체에서 분리된 그람 음성 세균들에 대한 Isepamicin의 시험관내 항균력

권현희,박수진,소민욱,박현구,최성호,김미나,최상호,정진용,우준희,김양수 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

Background : The increasing incidence of multidrug-resistant gram-negative bacteria causing nosocomial infections is an important clinical problem. Isepamicin is a recently developed aminoglycoside which has been known to have potent activity against gram-negative organisms. We evaluated the in vitro activities of isepamicin and other aminoglycosides against a large number of gram-negative organisms. Materials and Methods : We tested the in vitro antimicrobial activities of isepamicin, amikacin, gentamicin, and tobramycin against 566 gram-negative organisms collected between January 2006 and June 2006 in Asan Medical Center. Minimal inhibitory concentrations (MICs) were determined and interpreted according to the recommendations of Clinical and Laboratory Standard Institute (CLSI). The breakpoint MIC used for interpretation of isepamicin was MIC≤16 ㎍/mL as susceptible, 32 ㎍/mL as intermediate, and 64 ㎍/mL as resistant. Results : The MIC_(50)/MIC_(90) of isepamicln for Escherichia coli, Klebsiella pneumon/ae, Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterobacter cloacae were 1/2, 0.5/>128, 4/16, 16/>128, and 1/2 ㎍/mL, respectively. The susceptibilities for E. coli, K. pneumoniae, P. aeruginosa, A. baumannii, and E. cloacae were 100%, 86.4%, 89.7%, 50.0%, and 96.6%, respectively. For E. coli, K. pneumoniae, P. aeruginosa, and E. cloacae, isepamicln had better in vitro activities than gentamicin and tobromycin, and had similar activities with amlkacin. For A. baumanii, all four tested aminoglycosides had similar in vitro activities. Conclusion : Isepamicin had excellent in vitro activities against gram-negative organisms, except A. baumanii. The overall in vitro activities were similar with amikacin. 목적 : 그람 음성 세균은 다양한 지역사회 및 병원 획득 감염의 원인균이다. 최근에는 병원 감염을 일으키는 그람 음성 세균에서 항균제 내성균의 출현과 확산이 큰 문제가 되고 있다. Isepamicin은 최근에 소개된 gentamicin B의 유도체로 외국에서의 연구에 의하면 그람 음성 세균들에 대한 항균력이 우수함이 보고 된 바 있다. 본 연구에서는 우리나라의 임상 균주들을 대상으로 그람 음성세균에서 isepamicin의 시험관내 항균력을 기존의 아미노배당체 제재들과 비교하여 평가하고자 하였다. 재료 및 방법 : 2006년 1월에서 6월 사이에 서울아산병원 환자에서 분리된 Escherichia coli 113 균주, Klebsiella pneumoniae 110 균주, Pseudomonas aeruginosa 117 균주, Acinetobacter baumannii 108 균주, 그리고 Enterobacter cloacae 118 균주를 대상으로 isepaimcin, amikacin, gentamicin, tobramycin에 대한 최소억제농도(minimal inhibitory concentration, MIC)를 한천 희석법(Mueller-Hinton Agar)을 이용하여 측정하였다. 감수성여부는 CLSI 기준에 따랐으며, isepamicin은 MIC≤16㎍/mL를 감수성, MIC=32 ㎍/mL를 중등도 내성, MIC≥64 ㎍/mL를 내성으로 판정하였다. 결과 : Isepamicm의 E. coli, K. pneumoniae, P. aeruginosa, A baumannii, E. cloacae에 대한 MIC_(50)/MIC_(90)은 각각 1/2, 0.5/>128, 4/16, 16/>128, 1/2 ㎍/mL였고, 항균제 감수성률은 차례대로 100%, 86.4%, 89.7%, 50.0%, 96.6%였다. 기존 아미노배당체 제재들과 비교하면 E. coli, K. pneumoniae, P. aeruginosa, E. cloacae에서는 amikacin과 비슷한 감수성률을 보였고, gentamicin과 tobramycin보다 높은 감수성률을 보였다. A baumannii의 경우 isepamicin의 감수성률이 50.0%로 비교적 낮았지만 amikacin, gentamicin, tobramycin도 각각 50.0%, 46.3%, 47.2%의 감수성률을 나타내어 4가지 항균제가 모두 비슷한 항균력을 보였다. 결론 : Isepamicin은 그람 음성 세균들에 있어 기존의 아미노배당체 제재들과 비교했을 때 amikacin과는 동등한 시험관내 항균력을 보이고 gentamicin, tobramycin보다 뛰어난 시험관내 항균력을 보여 사용이 유망한 아미노배당체 중 하나라 생각된다.

連翹敗毒散加味方이 알러지성 접촉피비염에 미치는 影響 : DNCB 재노출부위의 생쥐 피부손상완화와 비만세포 분포 변화를 중심으로 Based on the mitigation of skin damage and distributive change of mast cell on DNCB re-expasure region of Mice

권오성,김진택,박인식,안상현,이해풍,김호현,강윤호 동국대학교 한의학연구소 1999 東國韓醫學硏究所論文集 Vol.8 No.1

본 실험은 連翹敗毒散加味方이 알러지성 접촉피부염 유발시 발생되는 면역과민반응과 염증반응 저해에 미치는 영향을 조사하기위해 행해진 것으로 2,4-dinitrochlorobenzene(DNCB, 5% DNCB 25㎕로 감작, 7일경과 후 2.5% DNCB 5㎕로 유발) 처리로 알러지성 접촉피부염이 유발된 ICR계 암컷 생쥐에 連翹敗毒散加味方抽出物(0.51g/㎏/day)을 음용투여 한 다음 contact hypersensitivity assay, 피부의 일반적인 구조 그리고 비만세포의 분포 변화를 관찰하였다. Contact hypersensitivity assay의 결과, 連翹敗毒散加味方抽出物 투여군의 ear swelling이 DNCB군에 비해 유의성있게 감소한 것으로 나타났다. 알러지성 접촉피부염 유발 후 관찰되는 피부손상은 48시간에 제일 심한 것으로 관찰되었으나, 連翹敗毒散加味方抽出物 투여군에서는 DNCB군 비해 완화된 결과를 보였다. 連翹敗毒散加味方抽出物 투여군의 진피에서 림프구를 비롯한 염증관여세포의 이주와 혈관생성 그리고 표피내로의 림프구의 침윤 등이 감소되었고, 표피 기저층과 가시층세포에서는 세포질내 액포화와 세포사이 공간 확장도 줄어든 것으로 관찰되었다. 한편 알러지성 접촉피부염 유발 후 분포가 증가한 비만세포는 형태가 주로 세포내 함유물이 분비된 degranulated type로 나타났다. 이에 반해 連翹敗毒散加味方抽出物 투여군는 DNCB군에 비해 출현 비만세포'수가 일부 감소했고, 비만세포의 형태는 granulated t-ype였다. 또한 serotonin 면역조직화학적 염색결과로 連翹敗毒散加味方抽出物 투여군에서 se-rotonin 양성반응성이 높은 granulated type의 비만 세포가 주로 관찰되었다. 이상의 결과로 미루어 連翹敗毒散加味方抽出物은 알러지성 접촉피부염으로 유발된 피부 손상과 염증을 완화시키는 효과가 있는 것으로 사료된다. After allergic contact dermatitis elicitated by Dinitrochlorobenzene(DNCB) treatment, ICR female mice administered Yunkyopaedocksangamibang(YPGM) extract were observed to investigate the effect of YPGM on allergic contact dermatitis. This study investigated that contact hypersensitivity assay, abdominal skin morphologic changes including mast cells. At contact hypersensitivity assay, the right ear swelling in YPGM group were probability decrease than DNCB group. At obsevation of abdominal skin morphologic change, the infilteration of lymhocyte, lymphocyte insertion to epithelium, enlarged capillary, angiogenesis, and damages of epithelium as cytoplasmic vacuolation and enlarge of inter cellular space in YPGM were diminshed than DNCB group. The number of mast cell was increased both DNCB and YPGM group. The shape of mast cell in DNCB group was mainly appeared degranulated type, but granulated type in YPGM group. The number of serotonin positive cell was increased both DNCB and YPGM group. The shape of serotonin positive cell in DNCB group was mainly appeared degranuled type, but granulated type in YPGM group. As results indicated that the YPGM exrtact administration work on the mitigation of skin damages in mouse with allergic contact dermatitis.

여학생 동복 하의 착용시의 생리반응과 주관적 착용감

권수애,오미경,강미영,송혜원,박진채,권리현 충북대학교 교육 ·생활연구소 생활과학연구센터 2002 생활과학연구논총 Vol.5 No.-

In this study, physiological responses and subjective sensations were investigated depending on various high school girls' lower cloth uniform in winter. Four healthy young women were selected, and they wore same underwear and jacket. The types of lower cloth were tight skirt+stocking, flared skirt+stocking, tight skirt+legings+socks, flared skirt+legings+socks, and slacks+socks. The results were as follows: 1) The effect of the type of lower cloth in winter on the skin temperature, humidity inside clothing and subjective sensations were significant. 2) It is desirable for high school girls to wear slacks in winter, Since physiological responses and subjective sensations of slacks are superior to those of skirts. 3) It is desirable for high school girls to wear flared skirt, legings, socks in winter, Since insulation and subjective sensations of flared skirts are superior to those of tight skirts.

여성 노인의 신체활동이 건강관련 자아존중감과 자기효능감에 미치는 영향

현승권,배진희 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The purpose of study was to investigate physical activity on the health-related Self-efficacy and Self-esteem and to identify a possible relationship positive psychological variables. Subjects were consisted of 276 female old women over 60 years old living in J-gu in Seoul. The measurement tools used in this study were korean version self-efficacy scale and self-esteem scale to test the old women belief, value attitude, confidence on life satisfaction. The results indicated that the positive psychological constructs of the elderly were differences according to age. The old women aged 65-69yrs had higher self-efficacy and self-esteem than the old women over 70yrs(*p<.05). Further, the results revealed that there was a significant difference in the positive psychological constructs of the elderly according to physical activity. The old women participating in a regular physical activity reported higher self-esteem in physical activity(*p<.05 ). The study has implications that the further study related in this field should consider other demographic factors, the advanced methodical techniques. Moreover there should be required the more in depth and broader research in this area.

알릴티오피리다진 유도체 합성 및 UV-C 조사에 대한 방어효과

권순경,현진원 德成女子大學校 藥學硏究所 2000 藥學論文誌 Vol.11 No.1

Four 3-alkoxy-6-allylthiopyridazines and 3-chloro-6-allylthiopyridazine were synthesized and their protective effects against oxidative stress and UV-C irradiation were tested. 3-Methoxy-6-allylthiopyridazine and 3-ethoxy-6-allylthiopyridazine did not show protective effect on the oxidative stress but showed the strongest protective effect on UV-C irradiation among the tested compounds. Especially 500 ㎍/㎖ of the two compounds was the most effective concentration.