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      • SCOPUSKCI등재

        Sphingomonas chungbukensis DJ77의 16S rRNA 염기서열과 이차구조

        이관영,권해룡,이원호,김영창,Lee Kwan-Young,Kwon Hae-Ryong,Lee Won-Ho,Kim Young-Chang 한국미생물학회 2005 미생물학회지 Vol.41 No.2

        S. chungbukensis DJ77로부터 16S rRNA유전자의 염기서열을 분식하였다. 염기서열은 총 1,502 bp로 2000 년에 등록된 부분 서열(1,435 bp)보다 5' 방향과 3' 방향으로 29 bp와 37 bp 길이만큼 각각 확장하였으며, 1 bp가 추가로 삽입되었다. E. coli의 16S rRNA유전자를 모델로 이차구조를 제작하였으며, 네 부위가 특이적임을 발견하였다. Sphnigomonas spp.의 16S rRNA 서열과 S. chungbukensis DJ77의 다중서열검색 결과, Sphingomonas종에서만 나타나는 보존부위와 가변부위를 발견할 수 있었다. 특히, Campylobacter jejuni에서만 나타나는 것으로 알려진 긴 stem loop구조가 서열은 조금 다르지만 구조적 일치를 보이는 유사한 구조를 S. chungbukensis DJ77에서도 발견하였다. 결과적으로, 다중서열검색을 통해 제작한 계통수와 nucleotide signatures분석에 근거하여 S. chugukensis DJ77을 cluster II (Sphingobium)로 분류하였다. A 16S ribosomal RNA gene from S. chungbukensis DJ77 has been sequenced. This sequence had a length of 1,502 bp and was extended for 29 bp at 5' and for 37 bp at 3' from the partial sequence (1,435 bp) registered in 2000 year. Besides, 1 bp was newly added near to the 3' end. We made the secondary structure of the 16S rRNA based on E. coli model and found four specific regions. We found constant and variable regions in genus Sphingomonas as the result of multiple alignment of 16S rRNA gene sequences from Sphingomonas spp. and S. chungbukensis DJ77. We found a stem loop structure in S. chungbukensis DJ77, which was only discovered in C. jejuni to date. It showed the structural agreement despite the difference of the sequences from the both organisms. Finally, S. chungbukensis DJ77 belonged to cluster II (Sphingobium) group, after the classification using phylogenetic analysis and nucleotide signature analysis.

      • 中小都市 下水處理를 爲한 水質特性에 關한 硏究(I)

        이관영 대구대학교 산업기술연구소 1992 産業技術硏究 Vol.11 No.-

        Nowadays water sources of an industrialized and modernized society get more and more deteriorated and so water quality in urban area requires all-weater management.Waste-water treatment which is a typical method of improving water quality wants being expanded not only into big cities but into middle or smal cities. in this study, I tried to exanine the drainage of successive measuring many water qualities (PH, DO, BOD, SS, NH₃-N, PO₄- P)in a slected experimental basin with hydrologic factors. I hope this study will do much for the planning for water quality treatment.

      • KCI등재후보

        반도체 생산공정의 대기질 개선을 위한 복합 대기오염물의 습식화학 제거공정

        이관영,전창성,김학주,박영무,이대원,함동석,전상문 한국청정기술학회 2007 청정기술 Vol.13 No.2

        본 연구에서는 반도체 제조공정 내의 습식 대기공조 정화설비에 사용될 화학수용액의 선정과 이를 이용한 대기오염물 정화 모사시험을 수행하였다. 50 ppm의 NH3, SOx, NOx의 제거에 있어서 0.5 M의 이산화망간(KMnO4) 수용액은 99% 이상의 제거율을 보였다. O3의 제거율은 22~30% 수준에서 머물러, 별도의 건식제거 장치가 필요한 것으로 판단된다. 또한 모든 화학수용액들에 있어 NOx의 제거효율은 O3가 공존할 경우, NO2 농도 증가로 인해 보다 증가될 수 있었다. 마지막으로 액상분사 시스템을 구성하여 화학수용액들이 공기압 분사식 노즐을 통해 60 ㎛ 수준의 미세 액적 형태로 분사됨에 따라, 기-액상간의 반응면적이 증가되어 기상오염물의 제거효율이 보다 향상될 수 있었다. - In this study, we performed basic researches to develop wet purification system for improving air qualities of ventilation in semiconductor manufacturing process. Using 0.5 M aqueous solution of KMnO4, 50 ppm of NH3, SOx and NOx were reduced to 99% successfully. However, the removal of O3 was limited to 22~30% for all the tested chemical solutions including KMnO4. Therefore, adoption of a dry ozone filter is necessary to reduce O3 below a satisfactory level. For all the chemical solutions tested, NOx removal efficiency increased as NOx was mixed with O3. As chemical solution was sprayed using water spraying system equipped with air atomizing type nozzle, the removal efficiencies of gaseous pollutants increased due to the increase of gas-liquid interfacial area.

      • 工團廢水의 嫌氣性消化에서 SO₄²-의 조沮害에 따른 糞尿의 비混合處理 效率에 關한 硏究

        이관영,박상현 大邱大學校 科學技術硏究所 1998 科學技術硏究 Vol.5 No.3

        We did biological treatment experimentation of the Anaerobic digestion of the factory sludge including highly concentrated SO₄²- after we mixed 10% night-soil with that sludge. We analyzed and investigated the results and then we could have the conclusions as follows 1. In the continuous experimentation in which the digestion temperature read 25±1℃, the removal rate of COD and VS was 41% and 39% each in case of the digester with the only factory sludge. But the result was different in the event of the mixed sludge with 10% night-soil. The removal rate of COD was 44% and that of VS, 45%, And the quantity of gas generation was 1,120㎖ in the only factory sludge, but 1,430㎖ in the mixed sludge with 10% night-soil, that is, the former generated 4.1㎖ time more gas than the injection quantity, the latter, 5.2 times more. 2. In the continuous experimentation at the digestion temperature of 35±1℃, the removal rate of COD and VS was 41% and 37% each in case of the digester with the factory sludge only. But in case of the mixed sludge with 10% night-soil, the removal rate was 44% and 45% each. And the gas generation quantity was different in each case. In the single sludge digester, the quantity was diferent in each case. In the single sludge digester, the quantity was 570㎖, but in the mixed sludge digester, the quantity was 760㎖. That means that the former generated 2.1 times more gas than the injection quantity and the latter, 3.0 times more. 3. Through the experimentation of the treatment of the mixed factory sludge including highly concentrated SO₄²- with 10% night-soil, we could see not only the improvement of treatment efficiency but also the remarkable increase of the generation quantity of Methane. Accordingly we could have the conclusion that this kind of mixed treatment of the factory sludge with night-soil would be very efficient.

      • 小都市 下水의 水質에 關한 硏究

        이관영 대구대학교 산업기술연구소 1994 産業技術硏究 Vol.13 No.-

        This is on the characteristics and the estimating methods of the pollutant load in small urban drainage systems. For this study, a small city without sewage treatment plants is selected at random and the various water qualities are examined. Four existing models for the estimation of pollutant load are investigated. They are applied individually to different periods characterized by rainfall and dischage. The model incorporating potential pollutant load with respect to various parameters such as rainfall, discharge, antecedent rainfall, rainless period, and rainfall intensity is suggested as an appropriate one.

      • KCI등재후보

        방열체 일체형 구조의 LED 아웃도어 등기구 상부커버에 관한 사출성형해석

        이관영 한국금형공학회 2020 한국금형공학회지 Vol.14 No.2

        This study is on the injection molding analysis for the LED outdoor lighting top cover of one heat sink body type structure. Thermoplastic and thermosetting resins were applied to compare the thermal properties during the injection molding process. The thermoplastic resin is used in this study due to special characteristics that it is light, good strength and dose long not transmute quality even if pass long time. The thermosetting resin is applied to this study due to good in strength, lightweight and excellent etc, thermal conductivity. This study presented a preliminary analysis of fill time, weld line, air trap etc. for the injection molding process of LED lamp cover and body through simulation using Moldflow. As a result of the study, it was selected HTM-102 material because the thermosetting resin has excellent strength and heat conductivity.

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