Addition of V2O5-MnO2/USY-zeolite catalyst in PTFE fiber for bag filter and its catalytic activity tests for NH3-SCR at low-temperature

Jin Ho Boo,Eunseok Kim,Byung Chan Kwon,Myung Jo Seo,Ji Man Kim,Ji Bong Joo,Dohyung Kang,No-Kuk Park 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-

This study investigated the catalytic activity of vanadium-manganese supported on USY-zeolite as a catalystfor low-temperature NO removal, and embedded the powder catalyst in PTFE filter of bag filter. TheV2O5-MnO2/USY-zeolite catalyst was prepared using the co-impregnation method, and the V2O5/MnO2ratio was 0/10, 2.5/7.5, 5/5, 7.5/2.5, or 10/0. The catalytic activity test for NH3-SCR(selective catalyticreduction) of NO was performed at 150–230 C. An enhanced NO conversion above 60% was exhibitedin the low-temperature region below 230 C, and the NO removal efficiency increased as the MnO2 contentincreased. The NH3-TPD and NO-TPD(Temperature Programmed Desorption) analysis confirmed thatthe NH3 adsorption of the catalyst more significantly influences the NO removal performance than the NOadsorption. As the MnO2 content on the catalysts increased, the strength and amount of adsorbed NH3increased, resulting in enhanced NO conversion. The catalyst-embedded PTFE (polytetrafluoroethylene)fiber was prepared by extruding physically mixed PTFE and catalyst powder. Scanning electron microscopy/energy dispersive X-ray spectroscopy confirmed that the catalyst was well dispersed on the surfaceand inside the PTFE fiber. The NO removal performance of the catalyst included PTFE fiber increased asthe amount of the catalysts added was increased.

L1210 세포증식에 대한 Glycyrrhizin의 억제작용 기전

殷載淳,徐龍勳,權鎭,柳東和,吳贊鎬,蘇俊魯,全焄,黃甲洙 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

The purpose of this research was to investigate the mechanism of inhibitory action of Glycyrrhizin(GZ) on the proliferation of mouse leukemia cell-line, L1210 cells. The cytotoxic activity was tested using a colorimetric tertrazolium assay(MTT assay), the apoptosis was tested using flow cytometry. Nitric oxide(NO) production form mouse peritoneal macrophage was tested using a Griess method and the phagocytosis of human polymorphonuclear cells was tested using a lucigenin chemiluminescence. GZ ingibited the proliferation of L1210, BALB/c 3T3 cells and mouse thymocytes at 50 ug/ml/ GZ did not affect nitric oxide production from mouse peritoneal macrophages in vitro, but ingibited nitric oxide production from lipopolysaccharide and y-interferon treated macrophages. Macrophages of GZ-administered mice accelerated NO production. The proliferation of L1210 cells apoptosis of L1210 cells were induced by co-culture with macrophage of GZ-administered mice. The apoptosis of L1210 cells were induced by co-culture with macrophage of GZ-administered mice. GZ increased the phagocytosis of human polymorphonuclear cells. These results suggest that GZ inhibit the proliferation of L1210 cells not only as a direct cytotoxic agent o tumor cells, but also by the enhancement of NO production and phagocytic activity.

한국 진보정당의 발전방안에 관한 연구

노찬백 광주보건대학 1996 論文集 Vol.21 No.-

The principal purpose of this study is to explain the failure factors and developmental schemes of the progressive parties in Korea. Analytical framework for describing reasons why the progressive party couldn't be institutionalized within political process in Korea was divided into external and internal factors. External factors are political situation, various legal and institutional regulations, and political culture. On the other hand internal factors are divided into formation debate and process, political activity, and political principle and policy of these parties. Through this analysis I discovered the fact that two factors, external factors and internal factors opperated the failure of progressive party simultaneously. The development schemes for progressive party are as follows ; the abolition of bad laws included national security law restricting individuals' political activity, permission on the free organization and political participation of labor union, improvement of the laws being related to political party and labour laws, settlement of democratic political culture and improvement of anti-communisnistic consciousness, activation of subsystem, the employment of main officers through election, the presentation of the concrete and specific policies for labor class or alienation class, sound financial management through positive political funds included party expenditure, and maintenance of the unique relationship with conservative parties or opposition influences.

미국의 대북정책 분석

노찬백 광주보건대학 2001 論文集 Vol.26 No.-

The Destiny of our country is influenced by the foreign policy of USA at Korean Peninsular, especially the foreign policy of USA at North Korea. The Bush administration being replaced the Clinton administration have hard-line policy toward North Korea. This policy is obstacle to the Second Summit Talk and disturb the exchange and cooperation between South and North. In this paper I analyzed the foreign policy of USA at North Korea in Clinton and Bush Administration.

한반도 평화체제 구축방안

노찬백 광주보건대학 2000 論文集 Vol.25 No.-

The tension and confrontation structure between South and North Korea has been continued since 1945. The task which constructs peaceful system in Korean peninsula is very important to our country and nation. This study is to analyze the concept and problem of peaceful system in our country and explain various plans for the construction of peaceful system. In this paper I suggested three schems ; the construction of the mutual cooperation between South Korea and USA, the continuous propulsion of South-North Summit Talk, and the propulsion of multiple talks included the four parth talks. In this paper I present the special organization, the security commitee for peace system which practices the construction of peaceful system in Korean peninsula. The peaceful system in our peninsula solves three problems ; the prevention of war recurrence, the security guarantee of the South and North Korea Regimes, and the embodiment of positive peace. Now it is very important thing that alleviates mutual tension between two Korean Regimes and reduces the hostility in order to unify Korean Peninsula. One of the method is summit talk between two Korean leaders.

합류식하수관거 월류수(CSO) 처리서설의 현황

박노연,조창현,최찬식 대한상하수도학회 2003 상하수도학회지 Vol.17 No.2

중증 세균 감염 및 내성균에 대한 Fosfomycin의 치료효과

김찬기,노승무,윤완희,장일성,배진선,손기섭 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

A Clinical study for the therapeutic effect of Fosfomycin was made in 20 cases with the severe infection and the resistent organisms against the other antibiotics. Fosfomycin was administered intravenously 2-4 gm daily in two divided for an average of 13.1 days. The overall effectiveness was 90% without any significant side effect and the effectiveness for the resistant organisms(13 cases) against the other antibiotics was 84.6%. These results demonstrated that Fosfomycin can be used effectively in the treatment of the severe infection and the resistant organisms against the other antibiotics.

農村地域主婦의 諸特性이 保健醫療에 미치는 影響

寄老錫,朴贊云 全北大學校 醫科大學附設 看護專門大學 1980 논문집 Vol.6 No.-

A multiple regression analysis was conducted in order to determine the effects of characteristics of rural housewives (age, education, occupation, and number of children), and characteristics of household (economic status, cultural level, and contact of health worker) on health status of family member and utilization medical cares. The data were collected from 533 rural housewives in Jeon-bug area for this analysis. The results summarized are follows : 1. The housewives' age, number of children, and occupation had positive correlation to prevalence of disease of family members, but the educational level had significant negative correlation. 2. Housewives' age, education, number of children and occupation have 16.8 per cent variable explained on health status. Multiple regression coefficients by age, education, number of children and occupation was 0.296, -0.207, 0.096 and 0.319 respectively. 3. Economic status, the frequency of health worker contact and health status have reciprocal positive coorelation. 4. Economic status, frequency of worker contact and cultural level have 19.8 per cent variable explained on health level of family members, Multiple regression coefficient of economic status, cultural status and contact with worker was -0.410, 0.171, and -0.273 respectively. 5. The selected variables on health status by stepwise regression analysis was 5.95 per cent variable explained in contact wit health worker, 10 per cent in economic status, and the contribution proportion of economic status was 4.3 per cent. 6. Health status(Prevalence of disease) and utilization of medical care had significant positive correlation(r=+0.42).

재생굵은골재를 사용한 콘크리트의 동결융해 특성

성찬용,윤준노,김영익,임상혁,정덕현 충남대학교 농업과학연구소 2003 농업과학연구 Vol.30 No.2

이 연구는 플라이 애시를 결합재 중량의 20%, 재생굵은골재를 천연쇄석굵은 골재의 0%, 25%, 50%, 75%, 100%를 치환하여 압축강도와 동결융해 특성을 구명하였으며, 이 연구를 통해 얻어진 결과를 요약하면 다음과 같다. 1. 재령 28일의 압축강도는 모든 배합비와 W/B 35%에서 400㎏f/㎠이상으로 나타나 고강도콘크리트에 이용될 수 있을 것으로 생각된다. 2. 중량감소율은 동결융해 300사이클에서 1%미만으로 나타났고, 표면박리와 같은 현상은 나타나지 않았으며, 재생골재의 대체율이 증가할수록 감소율은 증가하였다. 3. 초음파진동속도는 동결융해 300사이클에서 19~24%정도의 감소율을 나타내었으며, 재생골재의 대체율이 증가할수록 감소율은 증가하는 경향을 나타내었다. 4. 상대동탄성계슈는 재생골재의 대체율에 따라 60~72%의 범위로 나타내었으며, 재생골재 대체율이 증가할수록 감소하는 경향을 나타내었다. 5. 내구성지수는 모든 배합에서 60이상을 나타내었으나, 재생골재 대체율이 100%일때는 급격히 떨어지는 경향을 나타내었다. 6. 재생굵은골재를 사용한 콘크리트의 압축강도, 중량감소율, 초음파진동속도, 상대동탄성계수, 내구성지수 시험결과를 볼 때, 시험에 사용한 재생굵은 골재는 고강도콘크리트에 사용이 가능할 것으로 판단된다. This study was performed to examine the freezing and thawing properties of the high strength concrete using recycled coarse aggregate. The recycled coarse aggregate was replaced by 0%, 25%, 50%, 75% and 100% of natural crushed aggregate. The compressive strength of the concrete used recycled coarse aggregate was shown in more than 400kgf/㎤ at the curing age 28 days. The weight loss ratio by freezing and thawing was shown in less than 1% at all mix type. The pulse velocity and relative dynamic modulus were decreased with increasing the freezing and thawing cycles. Also, durability factor for the freezing and thawing were decreased with increasing the content of recycled coarse aggregate. But, recycled concrete replaced with recycled coarse aggregate 100% was shown in more than 60 by durability factor in freezing and thawing of 300cycles Accordingly, these recycled coarse aggregate can be used for high strength concrete.

폐석재와 석분을 사용한 식생블럭 제품 개발

성찬용,류능환,연규석,윤준노,김영익,남기성,노경희,박일순 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

본 연구는 폐석재와 석분을 사용하여 친환경적인 식생블럭 제품을 개발하기 위하여 폐석재의 입경과 석분의 첨가량을 각각 3종류씩 총 9종류의 식생블럭에 대하여 단위중량, 공극율, 투수량, 압축강도, 쪼갬인장강도, 휨강도, 내산성, 알카리농도에 대하여 구명하였다. 단위중량, 강도, 내산성은 골재의 입경이 작을수록 석분의 혼입량이 많을수록 크게 나타났으며, 공극율과 투수량은 작게 나타났다. 강도는 중성화 처리 유무에 따라 4∼5% 정도의 미소한 차이가 나타났다. 알카리 농도는 중성화 약품처리, 수중용출, 야외폭로 순으로 효과가 크게 나타났으며, 이는 식생블럭의 중성화 방법 선택에 매우 중요한 내용이라 할 수 있다. 또한, 식생상태는 공극율과 골재의 입경이 큰 식생블럭이 생육에 유리한 것으로 나타났다. This study was performed to develop the environment-friendly plantable block and to evaluate unit weight, void ratio, permeability, strength, acid-resistance and value of pH by the change of the grading of waste stone and the addition amount of stone dust. The unit weight, strength, acid-resistance is increased with small size of waste stone with increase of the addition amount of stone dust. But, the void ratio and permeability is decreased. The strength of neutral plantable block is decreased approximately 4-5% than that of the normal plantable block. The decreased effect of pH increased in order to neutral treatment, underwater leaching and field exposure. It is very important contents in neutral method selection of plantable block. Also, the planting state is grown rapidly with increase of the void ratio and of the waste stone size, approximately.