Development of High efficiency Food Waste Treatment System for Entering New and Renewable Energy Industry in Southeast Asia

Kwon,Ki-Tae,Lee,Woo-Sik,Kwon,Lee-Seung,Seong,Seung-Hwan,Kim,Young-Do,Kwon,Woo-Taeg 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

It is possible not only to treat high concentration organic matter such as food wastes but also to utilize food wastes as resources according to the bio-energy generation such as methane. The method of co-digestion of mixed wastewater mixed with organic wastes such as sewage sludge concentrated waters together with drinking wastewater is the most ideal method. Radiation not only has germicidal power in water treatment, but also is effective in decomposing degradable organic matter. Second chemical contamination problem is also solved because it does not use chemicals. Introduction of radiation pretreatment system to solve problems caused by mixing of waste water and organic waste resources. Biological electrochemical fusion system is used to remove the nutrients contained in the organic matter-removed mixture. Through the development of a system for treatment of high concentration wastewater, the processing efficiency is verified through the universal water treatment system for wastewater containing high concentration organic matter in addition to treatment of wastewater.

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.

새로운 Baculoviurs 전이벡터를 이용한 Escherichia coli β-galactosidase 유전자의 발현

우수동,김우진,김혜성,진병래,강석권 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1

국내에서 분리된 BmNPV를 이용하여 제작된 새로운 전이벡터 pBmKSK1에 외래 유전자로서 E. coli lacZ 유전자를 클로닝하고 재조합 바이러스를 제작하였다. 재조합 바이러스에 대하여 Southern blotting 분석을 실시하여 lacZ 유전자의 존재를 확인하였으며, 재조합 바이러스가 접종된 세포의 SDS-PAGE 및 Western blotting 분석을 통하여 β-galactosidase의 발현을 확인하였다. 재조합 바이러스의 발현효율을 누에 세포주 및 유충에서 비교 조사한 결과, 유충에서 더욱 높은 발현량을 보임을 확인하였다. To investigate the expression efficiency of new transfer vector of Bombyx mori nuclear polyhedrosis virus (BmNPV), Escherichia coli lacZ gene was inserted into new transfer vector pBmKSK1, under the control of polyhedrin promoter and expressed in BmN-4 cells coninfected with transfer vector pBmKSK1-LacZ and vild type BmNPV genome, and analysed by Southern blotting. The expression of β-galactosidase was characterized by SDS-PAGE, Western blotting and β-galactosidase activity assay. The results showed that the level of expression in silkworn larvae was higher than that of BmN-4 cells.

이륜차 무단변속기(CVT) 구동풀리의 시물레이션

권영웅,우영환,이종원,길성진 중앙대학교 생산공학연구소 1999 생산공학연구소 논문집 Vol.8 No.2

CVT 메카니즘은 공학적 분야에 많이 사용되고 있으며, 특히 CVT의 구동폴리느 중요한 역할을 한다. 본 연구에서는 이륜차의 CTV를 국산화 할 계획의 일환으로 구동폴리를 시뮬레이션하였다. 시뮬레이션한 결과느 구동폴리의 롤로 무게와 마찰 계수, 램프의 각변형을 통해 나온 수치르 장량화한 것이며, 이를 토대로 구동폴리의 각 요소들 즉, 롤러와 유동플랜지, 램프판 간의 상호관계를 규명하였다. CVT(Continuously Variable Transmission) mechanism has been used in many engineering applications. A driving pulley of CVT plays a vital role. In this study, computer simulation for a movable pulley was carried out for the purpose of producing a motorcycle CVT of Korean model. The effects of roller mass, friction coefficient, deformation of ramp plate on a given speed and torque during moving were quantified using the simulation results. Based on the simulation, relations between each component of driving pulley that consists of roller, movable flange and ramp plate etc. were investigated.

연 X-선 현미경을 이용한 금 나노입자 세포영상

권영만,김한경,김경우,김선희,윤홍화,천권수,강성훈,박성훈,정선관,윤권하 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.3

연 x-선 현미경은 ‘물의 창’ 영역(2.3~4.4 nm)의 파장을 이용하여, 수십 nm의 분해능으로 세포를 파괴하지 않고 살아있는 상태에서 세포의 내부구조를 관찰할 수 있어 가시광선현미경과 전자현미경을 단점을 보완하는 특징을 갖는 세포 생물학 연구에 적합한 현미경이다. 그러나 기존 연 x-선 현미경은 광원으로 방사선 가속기를 이용하기 때문에 사용이 제한적이었다. 이에, 본 연구에서는 2.88 nm의 연 x-선을 광원으로 사용하는 소형 연 x-선 현미경을 이용하여, 내포작용에 의해 금 나노입자를 포획한 HT1080과 MDA-MB 231 세포의 영상을 약 60 nm 분해능으로 획득하였다. 금 나노입자의 세포에 대한 독성을 제거하기 위하여 폴리에틸렌 글리콜을 캡핑하였고, 2.88 nm 파장의 연 x-선에 대하여 충분한 조영효과로 인하여 세포영상에서 뚜렷한 대조도를 나타내었다. 내포작용에 의해 액포에 포함되어 있는 다양한 크기의 금 나노입자 군집을 확인하였으며, 세포내부의 액포의 분포상태도 관찰할 수 있었다. 따라서 고분해능을 가진 소형 연 x-선 현미경을 이용하여 금 나노입자를 세포내의 미세기관이나 특정 단백질에 표지하면 연 x-선에 대한 조영효과의 증가에 의하여 더욱 유용한 정보를 획득할 수 있을 것으로 생각한다. A compact soft x-ray microscope operated in the ‘water window’ wavelength region (2.3~4.4 nm) was used for observing cells with nano-scale spatial resolution. To obtain cellular imaging captured with colloidal gold nanoparticles using a compact soft x-ray microscope. The colloidal gold nanoparticles showed higher contrast and lower transmission more than 7 times than that of cellular protein on the soft x-ray wavelength region. The structure and thickness of the cell membrane of the Coscinodiscus oculoides (diatome) and red blood cells were seen clearly. The gold nanoparticles within the HT1080 and MDA-MB 231 cells were seen clearly on the soft x-ray microscopy. The gold nanoparticles were aggregated within vesicles by endocytosis.

김남천의 에세이 연구

권성우 우리말글학회 2004 우리말 글 Vol.31 No.-

This thesis is written to study the critic, Kimnamchon's essay. As a result of the study, the followings are found; 1) Big crack and difference exist between Kimnamchon‘s essay and his political criticism. 2) Various and delicate opinions, which can not be found in his political criticism, are expressed in his essay. This is related to the characteristic of the genre as essay. 3) Rich understanding about autonomy of art is revealed in Kimnamchon's essay. In addition, his interest which is wide-opened to manners and culture at large is expressed in his essays. Especially, Kimnamchon's examination on commercialism and the relation of press and the field of literature is extraordinarily sharp. 4) His deep love for the family, longing for home, sentimentalism, and nihilism are abundantly found in Kimnamchon's essays.(Sookmyung Women's University)

生體血의 保存環境과 腐敗産物에 依한 血中알콜濃度變化에 關한 硏究

張成吉,金英雲,柳在薰,吳世珍,權五星,朴世延 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

상심실성 빈맥환자에서 관상정맥동의 형태비교

현대우,김윤년,박소영,한성욱,허승호,김기식,김권배 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.4

구강에 발생한 편평상피암종의 MMP-2, MMP-9, TIMP-1, TIMP-2 발현과 EGFR 및 E-cadherin 발현의 상호연관성

조성재,권창석,김용환,윤혜경,김우형,이희철 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.4

Objective : Matrix metalloproteinases(MMPs) are involved in the degradation of extracellular matrix, which is related to infiltrative growth and metastasis of tumor. Positive correlation between MMPs expression and clinico-pathologic parameters were reported, and MMPs expressions were regulated by tissue inhibitor of metalloproteinases(TIMPs) or cell adhesion molecules such as E-cadherin and epidermal growth factor receptor EGFR). The aim of this study is to evaluate the relationship between MMP-2, MMP-9 expressions and clinico-pathologic factors such as clinical stage. recurrence. histologic grade and invasion pattern, and between MMP-2 and MMP-9 Expressions and TIMP-1, TIMP-2, and E-cadherin expressions. Methods and Material : The materials were 55 cases of squamous cell carcinoma of the oral cavity, and immunohisdtochemical studies for MMP-2, MMP-9, TIMP-1, TIMP-2, E-cadherin and EGFR were performed. Clinico-pathologic factors such as clinical stage, recurrence, histologic grade and invasion pattern were recorded through microscopic examination and clinical record review. Statistical analyses between MMP-2, MMP-9 expressions and clinico-pathologic factors, TIMP-1, TIMP-2 expressions and EGFR and E-cadherin expressions were done. Results : 1. MMP-2 and MMP-9 expressions were noted in 30(54.5%) and 22(40.0%) of 55 cases, respectively. TIMP-1 and TIMP-2 expressions were observed in 21(38.2%) and 33(60.0%), and E-cadherin and EGFR expressions were found in 35(63.6%) and 26(47.3%) of 55 cases, respectively. 2. MMP-2 expression rate was slightly higher in cases without recurrence, and TIMP-2 expression rate was slightly higher in cases showing more infiltrative growth pattern. However, there were no significant differences of MMP-2, MMP-9, TIMP-1, and TIMP-2 expression rates according to other clinico-pathologic parameters were noted. 3. The expression rate of EGFR was higher in cases with well differentiation (p=0.0047), but no positive relationship between the expression rate of E-cadherin and histologic grade was found. There were no significant differences of the expression rates of E-cadherin and EGFR according to other clinico-pathologic parameters. 4. Cases with positive reaction for MMP-9 showed an increasing tendency of negative reaction for TIMP-1. However, signigicant relationships between MMP-2, MMP-9 expressions and TIMP-1, TIMP-2 expressions were not noted. 5. The expression rate of MMP-2 was higher in cases with positive reaction for Ecadherin and EGFR with no statistical significance. The expression rate of MMP-9 was significantly higher in cases with positive reaction for E-cadherin(p=0.0221), but there was no significant relationship between MMP-9 and EGFR expression. Conclusion : These results suggest that MMP-2, MMP-9, TIMP-1 and TIMP-2 expressions are involved in the development of oral squamos cell carcinomas, but MMP-2, MMP-9, TIMP-1, and TIMP-2 expressions might not seem to be a sueful prognostic factors because there were no significant relationship between clinicopathologic parameters, EGFR expression showed positive correlation with low histologic grace, so EGFR expression could be regarded as a good prognostic factor. In the progression of squamous cell carcinoma of oral cavity, MMP-9 and E-cadherin might be involved with positive correlation, but there were no significant correlations between MMP-2, MMP-9 and TIMP-1, TIMP-2 and EGFR expressions rate. Further study for other factors such as cytokines or growth factors except TIMP-1, TIMP-2 and EGFR will be needed.

Bacillus stearothermophilus KJ16이 생산하는 Cyclodextrin Glucanotransferase의 정제와 효소특성

김병우,김광현,남수완,권현주,송승구,윤종원 동의대학교 기초과학연구소 1999 基礎科學硏究論文集 Vol.9 No.1

Cyclodextrin glucanotransferase from B. stearothermophilus KJ16 that can produce both cyclodextrin glucanotransferase and cyclodextrinase was purified by ammonium sulfate precipitation, DEAE-cellulose chromatography, Sephadex G-100 chromatography, and FPLC. The molecular weight of the purified enzyme was about 65,000 dalton by SDS-PAGE. The optimal pH and temperature were 6.0 and 60℃, respectively. The enzyme was stable at 50℃ for 1 hr and in the pH range of 5.5 and 8.5. Mercaptoethanol and dithiothreitol inhibited the enzyme activity strongly. The enzyme produced 60% cyclodextrin(CD) from 5% soluble starch with the ^α-, ^β-, ^γ-CD ratio of 42 : 46 : 12. Amylopectin was the most suitable with 67% conversion to CD.