Fine mapping of grain weight QTL, tgw11 using near isogenic lines from a cross between Oryza sativa and O. grandiglumis

Ji‐Min Oh,Sangshetty Balkunde,Paul Yang,Dong‐Beom Yoon,안상낙 한국유전학회 2011 Genes & Genomics Vol.33 No.3

In our previous study, we reported the grain weight (GW)QTL, tgw11 in isogenic lines derived from a cross between Oryza sativa ssp. Japonica cv. Hwaseong and O. grandiglumis. The O. grandiglumis allele at tgw11 decreased GW in the Hwaseong background. To fine-map tgw11, one F5 plant homozygous for the O. grandiglumis DNA in the target region on chromosome 11 was selected from F_4 line,CR1242 segregating for tgw11 and crossed with Hwaseong to produce secondary F_2 and F_3 populations. QTL analysis using 760 F_2 plants confirmed the existence of tgw11 with an R^2 value of 15.0%. This QTL explained 32.2% of the phenotypic variance for GW in 91 F_3 lines. Substitution mapping with 65 F_3 lines with informative recombination breakpoints in the target region was carried out to narrow down the position of the tgw11. The result indicated that tgw11 was located in the 900-kb interval between two SSR markers, RM224 and RM27358. QTLs for grain width and grain thickness were also located in the same interval suggesting that a single gene is involved in controlling these three traits. Analysis of F3 lines indicated that the variation in TGW is associated with variation in grain shape, specifically grain thickness and grain width. Genetic analysis indicated that the O. grandiglumis allele for small seed was dominant over the Hwaseong allele. SSR markers tightly linked to the GW QTL would be useful in marker-assisted selection for variation in GW in breeding program.

한국예술가곡 효시에 관한 연구

이지연 ( Ji-yeon Lee ),공정배 ( Jeong-bae Kong ),김용범 ( Yong-beom Kim ) 한국사상문화학회 2016 韓國思想과 文化 Vol.85 No.-

본 연구는 독일어권에서 비롯된 예술가곡 리트(Lied)의 한국적 전이과정을 통해 한국예술가곡의 효시를 규명하고자하는 목적이다. 예술가곡은 시문학과 음악의 합일된 예술장르로서 독일과 오스트리아를 포함한 독일어권에서 발달된 가곡으로, 시인의 시에 작곡가가 선율을 붙이고 이를 성악가가 부르는 음악 양식이다. 그 효시를 슈베르트의 `실 잣는 그레첸(Gretchen am Spinnrade)`로 비정하고 있다. 작곡가의 임무란 좋은 시를 널리 알리는 것이었기 때문에 음악은 시에 종속되어 있었다. 그러나 예술가곡은 상호매체성에 의한 문화융합결과물로서 시와 음악이 서로가 각기 독립된 예술이었던 상태로부터 벗어나 완전히 하나로 융합되면서 또 하나의 새로운 양식으로 탄생한다. 슈베르트 이후 가곡의 작곡자는 더 이상 시의 언어 음율을 선율적으로 고양시키는 낭음자가 아니라 가사에서 말로 표현될 수 없는 영역을 음악적으로 표출하는 시의 자유로운 해석자의 역할을 하게 된다. 음악을 단순히 시를 쉽게 이해하는 보조수단에 국한시킨 이전의 가곡미학을 극복하고자 하는 새로운 경향들이 나타나면서 이전까지 작법인 유절가곡이 아닌 통절 작곡 형식이 새롭게 떠오르기 시작하였다. 이렇게 완성된 예술가곡은 1835년경 이후부터 독일을 벗어나 다른 나라로도 전파되어, 각 나라의 음악적 특징에 맞는 독자성을 지니며 민족음악으로 자리잡는다. 그리하여 그 갈래의 하나가 한국에 이르게 된다. 독일 예술가곡의 개념과 정의 및 조건에 맞는 한국 최초의 예술가곡이 어떤 작품인가는 학자들의 견해에 따라 논란이 존재 한다. 그러나 이 관점은 예술가곡을 시와 음악의 등가의 결합을 전제로 보았을 때 우리 시문학사적 위상과 일치하는 시기이다. 한국 시문학사는 1930년대에 이르러서 성숙함이 묻어나면서 시인들은 창작 행위에 대한 확고한 자신의 색깔을 드러내기 시작했다. 이 시기에 전문적인 시인의 등장이 활발해지는데 이때 정지용을 대표적으로 꼽을 수 있다. 1932년 7월 동방평론 4호에 발표한 정지용의 시 `고향`에 작곡가 채동선이 곡을 붙였고, 채선엽이 독창을 맡았으며 반주는 김애식이 맡았다. 작곡가 채동선은 독일에서 정통으로 작곡을 공부하고 귀국하여 <고향>을 작곡하였고 시기적으로는 물론 예술가곡의 완성의 필요충분조건은 모두 갖춘 한국 최초의 예술가곡 그 효시로 비정할 수 있다. This study aims to clarify the beginning of the Korean art song by reviewing how the German art song "lied" was traditionally transferred and spread in Korea. As a genre of art that unites poetry and music, the art song was originally developed in German-speaking countries including Germany and Austria; the then composers put a melody on poems so that singers(vocalists) could sing the songs. Gretchen am Spinnrade by Franz Peter Schubert is considered the beginning of such a style of music. Since promulgating good poems was one of the composer`s missions then, music was viewed as subordinate to poems. As an outcome of cultural convergence through intermediality, however, the two independent forms of art, poetry and music, came to converge into a completely single genre, heralding a birth of a new music style. Since Shubert, composers were no longer a mere reciter exalting poems by putting melodies on rhythmical poetic language; instead, they served as a free interpreter of poems to express the sentiment beyond the lyrics musically. In an attempt to overcome the stereotype that regarded music simply as an aid to better understand poems, a new trend such as through-composed songs, away from traditional strophic songs, emerged. Those German art songs were widely disseminated beyond Germany since 1835, and took root in many areas as folk music combined with each country`s traditional musical hallmarks. Korea was no exception. With Korean art songs originated from Germany, scholars in the field have long disputed over which one is the first Korean art song that complied with the concept, definition, and conditions of the German lied. When we consider the art song as a fair combination of poetry and music, a hint can be found from the history of Korean poetry. Korean poetry began to mature in the 1930s with poets clearly expressing their own signature colors in their creations. Professional poets actively broke onto the art scene, and Ji-yong Jeong was one of them. Mr. Jeong released a poem titled "Home (Gohyang)" on No. 4 Dongbang Critique in July, 1932, and Dong-sun Chae, a composer, put a melody on it; later it was sung by Sun-yub Chae with the piano accompaniment by Ae-sik Kim. After studying composition officially in Germany, Dong-sun Chae returned to Korea and composed the song, meeting all of necessary and sufficient conditions of the German lied. In this sense, "Home (Gohyang)" can be regarded as the first Korean art song.

Slide Session : OS-IFD-07 ; Infectious Disease : In Vitro Antiviral Activity of Ribavirin Against Severe Fever with Thrombocytopenia Syndrome Virus

( Myung Jin Lee ),( Kye Hyung Kim ),( Jong Youn Yi ),( Su Jin Choi ),( Chung Jong Kim ),( Nak Hyun Kim ),( Kyoung Ho Song ),( Pyoeng Gyun Choi ),( Ji Hwan Bang ),( Wan Beom Park ),( Eu Suk Kim ),( San 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

In Vitro Antiviral Activity of Ribavirin Against Severe Fever with Thrombocytopenia Syndrome Virus Myung Jin LEE1, Kye-Hyung KIM1, Jongyoun YI2, SuJin CHOI1, Chung-Jong KIM1, Nak- Hyun KIM1, Kyoung-Ho SONG1, Pyoeng Gyun CHOI1, Ji-Hwan BANG1, Wan Beom PARK1, Eu Suk KIM1, Sang-Won PARK1, Hong Bin KIM1, Nam Joong KIM1, Myoung- Don OH1 Seoul National University College of Medicine, Korea1, Pusan National University School of Medicine, Korea2 Background: Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by a novel Bunyavirus, severe fever with thrombocytopenia syndrome virus (SFTSV). No effective antiviral therapy is proven yet, but clinical use of ribavirin (RBV) has been tried. We investigated the antiviral effect of RBV against SFTSV in vitro. Methods: To test for cytotoxicity of RBV, Vero cells were treated with different concentrations of RBV (3.90 to 500 μg/mL, two-fold dilution) and analyzed by cell viability MTS assay 48h post-infection. To determine antiviral activity of RBV against SFTSV, Vero cells were infected with SFTSV strain Gangwon/Korea/2012 at 100 TCID50 (50% tissue culture infective dose) per well in a 96-well plate, and RBV was added at the concentrations showing no or minimal cytotoxicity. Viral RNAs were extracted from the culture supernatants and quantifi ed using one-step real-time reverse transcription- PCR to amplify the partial large segment of SFTSV. Statistical analysis was done by one-way ANOVA with Tukey`s post hoc test. Results: Cytotoxicity due to RBV was not observed at RBV concentration =31.3 μg/ mL. Viral RNAs at 24h post-RBV treatment were reduced with increasing RBV concentrations (1-32 μg/mL), compared with those of mock-treated cells (P <0.01, Figure). Half maximal inhibitory concentration (IC50) of RBV was 3.69 μg/mL at 24h post-RBV treatment. Conclusions: Our study shows that RBV has antiviral effect against SFTSV in a dose-dependent manner. Further studies are required to evaluate the effi cacy of RBV in SFTS.

접착제 미 사용시 치면열구전색제로서의 유동성 복합레진 평가

권호범,김명진,신철환,김지연,박기태 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2

본 연구의 목적은 유동성 복합레진을 치면열구전색제로 사용할 수 있는지 여부를 평가하는 것이다. 세 종류의 유동성 복합레진(Filtek Flow, Tetric Flow, Charmfil Flow)과 한 종류의 filled sealant(Ultraseal XT plus)가 사용되었다. 주사전자 현미경을 이용하여 세 종류의 유동성 복합레진 및 filled sealant의 resin tag 형성 양상을 비교하였다. 미세누출 평가를 위해 발거된 사람의 소구치 54개를 각각 18개씩 무작위로 세 군으로 배분하였다. 각 군마다 통상의 filled sealant 와 한 가지씩의 유동성 복합레진을 교합면 열구에 도포하였다. 치아들은 thermocycling(5˚ ± 2℃와 55˚ ± 2℃ 사이에서 30초씩 1200회 시행) 후 48시간 동안 1% methylene blue 용액에 보관하였다. 각각의 치아를 절단하여 미세누출 정도를 관찰하였다. 세 종류의 유동성 복합레진 및 filled sealant는 유사한 resin tag 형성양상을 보였다. 세 종류의 유동성 복합레진은 각각 filled sealant보다 현저히 더 많은 미세누출을 보였다. 세 종류의 유동성 복합레진 간의 미세누출 정도는 유사하였다. 유동성 복합레진은 통상의 filled sealant와 비교해볼 때 보다 많은 미세누출을 야기할 수 있으므로 치면열구전색제로 적절하지 않다. The aims of this study were to determine if flowable composites can be used as pit and fissure sealants without bonding agents. Three flowable composites(Filtek Flow, Tetric Flow, Charmfil Flow) and a filled sealant (Ultraseal XT plus) were used. The pattern of resin tag formation in the four sealant meterials were compared using SEM. For the microleakage assessment, 54 extracted human premolar teeth were randomly divided into 3 groups containing 18 premolars each. In each group, a conventional filled sealant and one of the three flowable composites were applied to occlusal fissures. The teeth were thermocycled(1200 cycles between 5˚± 2℃ and 55˚± 2℃ with a dwell time of 30 seconds) and immersed in a 1% methylene blue solution for 48 hours. Each tooth was sectioned and examined to determine the extent of dye penetration. Three flowable composites and a filled sealant showed a similar resin tag formation pattern. The three flowable composites showed significantly more microleakage in each group than the filled sealant. The level of microleakage was similar in the three flowable composites. Flowable composites are not recommended as pit and fissure sealants because more microleakage can occur even when occlural fissures are mechanically widened.

초고속 광통신용 Avalanche photodiode의 제작 및 특성에 관한 연구

유지범,박찬용 成均館大學校 科學技術硏究所 1994 論文集 Vol.45 No.2

We review the characteristics of Avalache photodiode(APD) for long haul and high bit- rate optical fiber communication system including basic operating principle, excess noise factor, and bandwidth, and we also summarize recent progress. Separate absorption garding, charge and multiplication APD with charge plate layers instead of guard ring was designed and fabricated using metalorganic chemical vapor deposition and reactive ion etching technique. APD shows 37∼48V of breakdown voltage and very low dark current less than 10 nA at 90% of breakdown voltage. Receiver consisting of APD and Ga As pre - amplifier shows sensitivity of - 33.6dBm in the application of the pseudorandom 2^23-1 non- returen- to- zero(NRZ) patterns at 10^-9 bit error rate(BER).

국내 의료기관의 항생제 사용 실태와 규제 시스템 조사

방지환,송경호,박완범,김성한,조재현,김홍빈,김남중,오명돈,최강원 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

목적 : 이전 연구들에 따르면 아직까지 국내에서 불필요한 항생제 사용은 무시할 수 없는 수준이며, 특히, 수술환자들에 대한 예방적 항생제 투여가 문제로 지적되고 있다. 많은 병원에서 불필요한 항생제 처방을 제한하려는 노력을 하고 있지만 구체적인 현황에 대한 자료는 적은 실정이다. 이에 본 연구자 등은 국내 의료기관의 항생제 규제 시스템의 현황과 수술시 예방적 항생제 사용의 적정성을 알아보고자 한다. 재료 및 방법 : 전임 감염내과 전문의가 근무하는 의료기관 55곳에 대해 설문조사를 시행하였다. 설문의 내용은 적정한 항생제 사용을 유도하기 위한 정책 및 규제 프로그램, 실제 각 의료기관의 예방적 항생제 사용 현황 등으로 이루어져 있다. 결과 : 55개의 의료기관에 보낸 설문 중 44개가 회수되었다. 회신한 의료기관에서 항생제 처방 관리는 제한항생제 시스템을 가장 많이 이용하고 있었고(95.5%), 항생제에 대한 교육(79.5%), 전산시스템에서 관리(59.1%), 감염내과에 의뢰(54.5%), 항생제 사용 실적 검토(52.3%) 등의 순이었다. 대개의 병원에서 glycopeptides (100.0%), carbapenems (93.0%), quinupristin/dalfopristin 또는 linezolid(93.0%), 4세대 cephalosporin (74.4%), caspofungin 또는 voriconazole (62.8%), liposomal amphotericin B (60.5%) 등을 제한항생제로 분류하여 관리하고 있었다. 모든 의료기관에서 위절제술 및 유방절제술시에 불필요하게 예방적 항생제를 사용하고 있었다. 슬관절치환술의 경우 2세대 cephalosporin을 예방적으로 사용하는 경우가 가장 많았으며(30.2%), 관상동맥우회술의 경우 3세대 cephalosporin을 예방적으로 사용하는 경우가 가장 많았다(47.2%). 예방적 항생제의 투여 기간을 살펴보면 위절제술시 70.5%에서 4일을 초과하여 사용하고 있었고, 유방절제술시에는 63.6%에서, 슬관절치환술시에는 81.8%에서, 관동맥우회술시에는 81.1%에서 4일을 초과하여 장기간 예방적 항생제를 투여하고 있었다. 한편, 예방적 항생제 투여시 aminoglycoside계 항생제를 병용하는 경우도 많았다. 결론 : 아직까지 국내 의료기관에서 항생제 오남용을 막기 위한 노력이 더 필요할 것으로 생각되며, 특히 수술시 예방적 항생제의 올바른 투여에 많은 관심이 필요하다. Background : Previous studies in Korea showed that unnecessary antibiotic use could not be neglected, especially in prophylactic use. Currently many hospitals employ diverse antibiotic stewardship programs, but there are few studies on surveillance of such programs. So, we planned this study to evaluate current status of antimicrobial stewardship and adequacy of antimicrobial prophylaxis in surgery. Materials and Methods : We sent questionnaires about policy on antibiotic usage, control program for adequate antibiotic prescription, and actual status of prophylactic antibiotic usage to 55 infectious disease physicians in each hospital. Results : Of 55 contacted infectious diseases clinicians, 44 answered the questionnaire. Majority of hospitals employed restricted antimicrobial system (95.5%), education (79.5%), control by order communicating system (59.1%), consult to infectious disease physicians (59.1%), and review of cumulative antimicrobial usage (52.3%) to prevent inadequate antibiotic use. Glycopeptides were designated as a restricted antimicrobial agent in 100.0% of hospitals; carbapenems, 93.0%; quinupristin/ dalfopristin or linezolid, 93.0%; the 4th generation cephalosporins, 74.4%; caspofungin or voriconazole, 62.8%; liposomal amphotericin B, 60.5%, and so on. Unnecessary perioperative prophylactic antimicrobial agents were prescribed in gastrectomy and mastectomy in all the hospitals. The second generation cephalosporins and the third generation cephalosporins were the most commonly prescribed prophylactic antimicrobial agents in total knee replacement arthroplasty (TKRA) and coronary artery bypass graft surgery (CABG) respectively. In 70.5% of institutes they use prophylactic antimicrobial agents more than four days in gastrectomy; 63.6% in mastectomy; 81.8% in TKRA; 81.1% in CABG. Unnecessary combination of aminoglycosides with other antimicrobial agents for prophylactic use was another common problem. Conclusion : This study shows that more effort is required to diminish antimicrobial misuse or overuse, especially in prophylactic use for surgical patients.

20년전과 비교한 한국청년의 미소 변화에 관한 연구

범승균,정지혜,김태영,이경은,동진근 大韓齒科補綴學會 2012 대한치과보철학회지 Vol.50 No.3

Purpose: Teeth are generally exposed when people smiling. Moreover, the exposed teeth and soft tissue when smiling becomes an important guideline for esthetically prosthetic restoration. This research is to compare and find out differences of Korean young men's smile living in presence and twenty years ago. Materials and methods: Subjects, 100 young men (50 male and 50 female), were required about several aspects; normally developed physical condition, no psychological or genetic disorders, a fine face with no loss of teeth, no experience in orthodontic or prosthetic treatment, relatively normal occlusion, aged between 20 - 29. The photos of the subject at rest position and front face when fully smiled were taken three times. 100 photos (50 male and 50 female) were chosen at random from the 240 university students' smile photos taken by Yoon and his colleagues in 1991. By Hulsey's method of measuring smile, several factors; the change of upper lip curvature, the change of the relation between the upper lip and teeth, parallelism between Mx. incisor and lower lip, contact relation between Mx. incisor and lower lip and teeth displayed in a smile, were measured and analyzed. Meanwhile, ten dentists assessed aesthetic evaluation about men and women's smile for twice and recorded and compared smile score. The -test (P<.05) was used to compare the measured value. The difference of smile score was analyzed by t-test (P<.05). Results: The smile score calculated in 2011 (60.22) was higher than that of 1991 (52.80). Among five measurement categories, the noticeable difference was distinguished from two factors; the change of upper lip curvature and contact relation between Mx. incisor and lower lip. Conclusion: The Korean young men's smile has been considerably improved for twenty years. And it is found that the change of upper lip curvature plays an important role, that is, the smile formed with an ascended labial commissure has been increased significantly. 연구 목적: 일반적으로 치아는 미소 지을 때 가장 많이 노출되며, 미소 시에 나타나는 치아와 연조직과의 관계 등은 심미적인 보철 수복에 있어서 중요한 지침이 된다. 본 연구는 20년 전 한국 청년들의 미소와 현재 한국 청년들의 미소를 비교하여 그 차이를 알아보고자 하였다. 연구 재료 및 방법: 신체적인 발육 상태가 정상적이고 전신적 또는 유전적 질환이 없으며, 안모가 양호하고 치아의 결손이 없으며 교정 및 보철치료를 받은 경험이 없고, 교합상태가 비교적 정상적인 20 - 29세 사이의 청년 100명(남자 50명, 여자 50명)을 대상으로, Cephalometer에 사용되는 두부 고정 장치를 사용하여 피검자의 F-H plane이 지면에 평행하도록 한 후, 35 mm 카메라(400D. Cannon, Japan), 120 mm 렌즈 그리고 삼각대를 사용하여 피검자의 midsagittal plane에 카메라 렌즈의 중심을 맞추고 상악 중절치 절단과 렌즈와의 거리를 930 mm로 하여 안정위 및 full smile 시의 안모 정면 사진을 3회씩 촬영하였다. 1991년 윤 등이 촬영한 대학생 240명 중 무작위로 선택한 100명(남자 50명, 여 자 50명)의 미소사진과 함께 개인용 컴퓨터 및 V-ceph 6.0 프로그램을 이용하고 Hulsey의 미소 계측 방법을 참고로 하여, 상순의 형태, 상순과 치아와의 관계, 하순과 상악 전치 절단연과의 평행 관계, 하순과 상악 전치 절단연과의 접촉 관계, 미소시 나타나는 치아 등을 계측하고 분석하였다. 한편 치과의사 10인이 남,녀 각 2회씩 미소에 대한 미적 평가를 시행하여 미소평점을 기록하고 비교하였다. 결과: 지난 20년간 한국 청년의 미소가 크게 향상되었으며 이러한 변화는 주로 상순의 형태가 영향을 준 것을 알 수 있었다. 즉 입꼬리가 위로 올라가는 형태의 미소가 괄목할 만한 증가를 보인 반면 입 꼬리가 아래로 처지는 형태의 미소는 현저한 감소를 보였다. 결론: 지난 20년간 한국 청년의 미소가 크게 향상되었는데 이러한 변화는 주로 상순의 형태가 영향을 준 것으로 나타났다.

D8S210 유전자 과변이부위의 클로닝과 한국인에서 집단유전학적 분석을 통한 법의학적 활용성에 관한 연구

한지수,한길로,염범우,황적준 大韓法醫學會 1997 대한법의학회지 Vol.21 No.2

A multi-locus probe. called pHK-450. detecting multiple variable DNA fragments, was constructed by cloning of the 450 bp fragments into pCR?? vector, which could be obtained from amplification of the variable region of the D8S210 locus of human genome with a primer set of UF1. UR1, and UR2. The sequence data shows that the variable region is entirely G-C rich on one strand consisting of tetranucleotide repeat unit (GGAA)n at both margins and internally diversed regions with simple irregular repeat units of GGAA, GGAG, or GGGAA. The genetic complexixty of the resulting individual-specific DNA patterns was investigated by studying a Korean pedigree(both parents and 10 children). HaeIII and HinfI-generated DNA fragments are inherited to their children in a Mendelian manner with segregation ratio of 1:1.05 and 1:1.14. respectively. In the HinfI-digested genomic DNAs, the segregation of up to 25 variable DNA fragments from both parents could be analysed in a single sibship. Most of these variable DNA fragments detected by pHK-450 probe are not paired as allele, which suggests that they may be derived from 23 heterozygous loci. In the HaeIII-digested genomic DNA, 26 variable DNA fragments are segregated from both parents to 10 children. Excluding one allelic and three linked DNA fragments, 22 out of 26 scored DNA fragments may be derived from 23 hetrozygous loci. To determine the variability of DNA fragments, DNA samples from 113 unrelated Korean were digested with HinfI and hybridized using pHK-450 probe. Pairwise comparisons of individual variable DNA fragments show that the polymorphic patterns were highly specific to an individual. The mean probaility(X) that fragments in A individual is present in B individual is 0.0337. From the degree of maxiaml sharing, band approximate estimates of mean allele frequency and homozygosity is calculated being 0.187 and the mean heterozygossity is 89.69%. For pHK-450 probe, the probability that all 10 resolved DNA fragments in the 5-30 kb size range in an individual A are also present in a second unrelated individual B is (0.337)?? or 7.1 X 10??

Systemic Lupus Erythematosus를 동반한 Multiple sclerosis

이지현,이기주,윤성호,부귀범,손현화,박유환,정춘해,김진호,정원영 조선대학교 부설 의학연구소 1998 The Medical Journal of Chosun University Vol.23 No.2

Multiple sclerosis and lupus erythematosus are chronic, potentially disabling diseases of unknown cause. It is a rare occasion that the finding of both diseases occurs in one patient. Because both diseases may affect the central nervous system, it may be difficult at times to differentiate symptoms of lupus erythematosus from those of multiple sclerosis. As far as we know, there was no case report of SLE in multilple sclerosis in Korea. We report a case of multiple sclerosis accompanied by SLE.

회분식 활성슬러지 반응기에 의한 염분폐수의 생분해성 평가

서정범,김민종,배지은,이상명 안양대학교 산업기술연구소 2001 自然科學硏究 Vol.8 No.-

생물학적 처리가 가능한 염분 농도의 범위를 알아보기 위하여 회분식 활성슬러지 반응기에 합성폐수를 주입하여 실험을 수행하였다. 연구결과 폐수중의 염분 농도가 20,000mg/L 이상이 되면 폐수처리 효율이 떨어지는 것을 알 수 있었다. 염분 농도가 10,000mg/L 이하 일때는 회분식 활성슬러지 반응기에 의한 TOC 제거효율이 85% 이상인 반면, 염분 농도가 20,000mg/L 이상일 때는 TOC 제거효율이 80% 이하를 나타내었다. 또한 생물반응조내의 MLSS 농도에 따라 질산화 정도가 다름을 알 수 있었다. To determine the salt concentration range which wastewaters be treated by biological processes, experiments were performed by feeding activated sludge batch reactor with synthetic organic wastewater. Results of the research showed that wastewater treatment efficiencies deteriorated as salt concentration of wastewaters became above 20,000mg/L. The TOC removal efficiencies of activated sludge batch reactor were above 85% when the salt concentration were below 10,000mg/L. On the other hand, when the salt concentration were above 20,000mg/L, the TOC removal efficiencies were below 80%. It was also found that nitrification was affected by the MLSS concentration in the reactors.