http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
회야호의 남조류 발생 특성과 남조류 독소의 농도분포특성
최영아(Young Ah Choi),한난숙(Nan Sook Han),임은경(Eun Gyoung Lim),김영민(Young Min Kim),전창재(Chang Jae Choun),이병호(Byoung Ho Lee) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.12
최근 국내의 호소들에 부영양화가 진행됨에 따라 남조류가 대량 번식하는 현상이 나타나고 있다. 남조류에 의한 녹 조현상은 미관상 불쾌감을 유발하고 이취미 유발과 함께 정수장애도 일으킨다. 그리고 일부 남조류가 생산하는 남조류 독소 에 의한 야생동물 및 가축에 대한 피해가 계속적으로 보고됨에 따라 우리나라에서도 조류주의보 발생 시 조류독성에 대한 모 니터링을 강화하게 되었다. 이번 연구에서는 울산시가 상수원으로 사용하고 있는 회야호에서의 남조류 발생 특성을 조사하 고, 물리, 화학적 환경요인과의 관계를 알아보았다. 그리고 남조류 발생 시 생성되는 남조류 독소(Cyanotoxins) 중 Microcystin 4종과 Anatoxin-a 등 5종을 LC-MS/MS를 이용해 분석하여 그 거동을 알아보았다. 조사 기간 동안 회야호에서는 남조류 중에 서 Microcystis가 우점하였고, 남조류 개체수는 수온, pH와 양의 상관관계를 나타내었다. 이 시기 동안 Microcystin-LR의 최대 농도는 0.424 μg/L, Microcystin-RR의 최대 농도는 0.117 μg/L 이었다. Cyanotoxins의 농도는 수온, pH와 강한 양의 상관관계를, 총인 농도와 양의 상관관계를 나타내었다. 그리고 정수장으로 유입되는 원수에서의 총 Cyanotoxins의 농도는 0.182 μg/L 이었고, 정수에서는 검출되지 않았다. Algae blooms have soared recently in the lakes across the nation due to eutrophication. Blue-green algae cause unpleasant scene, produce taste and odor problem, and hinder processes in drinking water treatment. Algae toxicity monitoring has been strengthened, because the damages of wild lives and livestocks by algal toxins have been reported. Investigation on the characteristics of cyanobacterial occurrence and concentration distribution of Cyanotoxins in Hoeya reservoir have been conducted. Physical and chemical influences of water environment on cyanobacterial occurrences have also been studied. Movements of four species of Microcystin and five species of Anatoxin-a among Cyanotoxins were observed by LC-MS/MS analysis. Microcystis spp. among the cyanobacteria have mainly dominated in the Hoeya reservoir during the investigating period. The density of cyanobacteria were positively correlated with temperature and pH of water. Highest concentrations of Microcystin-LR and Microcystin- RR were 0.424 μg/L and 0.117 μg/L at the sampling points. Total concentration of Cyanotoxins in water coming into the water treatment plant was 0.182 μg/L, and they were not detected in treated water.
Pseudomonas sp. EL-G527에 의한 환경친화성 생물계면활성제의 생산최적조건
차미선,임은경,이근희,조순자,손흥주,이상준 한국환경과학회 2002 한국환경과학회지 Vol.11 No.3
A biosurfactant-producing microorganism was isolated from activated sludge by enrichment culture when grown on a minimal salt medium containing n-hexadecane as a sole carbon source. This microorganism was identified as Pseudomonas sp. and it was named Pseudomonas sp. EL-G527. It's optimal culture condition is 2% n-hexadecane, 0.2% NH_4NO_3, 0.3% KH_2PO_4, 0.3% K_2HPO_4, 0.02% MgSO_4·7H_2O, 0.0025% CaCl_2·6H_2O, 0.0015% FeSO_4·7H_2O in 1ℓ distilled water and initial pH 7.0. Cultivation was initiated with a 2% inoculum obtained from starter cultures grown in 30 ㎖ of the same medium in 250 ㎖ flask. They were cultivated at 30 ℃ in reciprocal shaking incubator and the highest biosurfactant production was observed after 4 days.
Acinetobacter baumannii의 항생제 내성유형과 PCR을 이용한 plasmid성 β-lactamase 유전자의 검출
문지영,김영희,임은경,오양효,김영부 한국생명과학회 2000 한국생명과학회 학술발표회 Vol.29 No.-
Acinetobacter baumannii strains have gained increasing nosocomial significance. They are compounded by the widespread resistance of most hospital isolates to the major groups of antibiotics. A total of sixty-six A. baumannii strains were isolated from different clinical isolates in PNU hospital between March and August 1999. We were analyzed antimicrobial susceptibility, DNA pattern and plasmid-mediated β -lactamase genes by PCR method. Most strains were resistant to cephalothin (96.97%), and the resistant rate to other antibiotics were more than 60%. But most strains were susceptible to imipeneme (92.42%). In the antibiotic resistant patterns, 9 kinds of multiple resistant patterns of A. baumannii isolates were detected. The highest resistant pattern was cephalothin-ampicillin-cefamantole-cefoxitin-gentamicin-cefotaxime-sulfamethoxazole-ciprofloxacin type (54.5%). Forty-three (65.15%) were resistant to at least five β -lactam antibiotics. This isolates had the same plasmid profile, with 2 plasmids. However, only twenty-six of forty-three isolates appeared TEM-type β -lactamase.