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주홍일,( Muruganantham Rethinasabapathy ),박범준,차영록,허윤석 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Microbial fuel cells (MFC) are bioelectrochemical systems designed to convert the chemical energy contained in organic matter into electrical energy utilizing catalytic (metabolic) activity of microorganisms. The fabrication of novel carbon materials as anodes to generate power without the utilization of noble metals is a hot-spot in the research of MFC. In the present work, silver grass (Miscanthus sinensis) has been used as an anode material for achieving higher power density and to remove heavy metals (Cr, Co and Cu) from contaminated wastewater through microbial fuel cell. The biomass carbon powder obtained from silver grass exhibited high specific area (2700 m2 g-1) with excellent porous structure which facilitates the growth of bacteria (E. Coli) during the MFC operation and resulted in delivering high power output with the decontamination of contaminated waste water by removing the heavy metals.
주홍일,( Muruganantham Rethinasabapathy ),강성민,허윤석 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Multifunctional Fe-aminoclay/carboxymethyl cellulose/polyhedral oligomeric silsesquioxane composite (FeAC/CMC/POSS) with layered structure was successfully synthesized and utilized as adsorbent for the removal of cesium ions (Cs+) and cationic dyes methylene blue (MB) and chrysoidine G (CG). The FeAC/CMC/POSS exhibit excellent adsorption capacities for Cs+ ions, MB and CG of 152, 438 and 791 mg g-1, respectively. The unprecedented adsorption capacities for Cs+ ions, MB and CG may be attributed to (i) the layered morphology of the composite and-NH2 groups on clay surface; (ii) existence of-COO-and-OH- groups on the CMC backbone. More importantly, the incorporation of POSS increases the interlayer spacing of Fe-aminoclay providing room for the encapsulation of Cs+ ions and dye molecules. Owing to superior adsorption capacity, the devised FeAC/CMC/POSS composite could be a promising organic-inorganic material used to cost-effectively remove the multitude of environmental pollutants.
주홍구,Joo, Hong-Gu The Korean Society of Veterinary Science 2003 大韓獸醫學會誌 Vol.43 No.4
Dendritic cells (DCs) play an essential role in a variety of immune reactions involving $CD4^+$ T cells and have been used to enhance tumor-specific immune responses. Immunosuppression in patients with cancer includes the downregulation of function and number of DCs. Although DCs have been studied, the apoptosis of Des induced by anticancer drugs for chemotherapy remains largely uncharacterized. This study demonstrated that GM-CSF protects DCs from 5-fluorouracil (5-FU) or mitomycin C-induced apoptosis. After 6 - 10 days culture, DCs were characterized by specific surface marker, CD11c and MHC class II. MTT assay revealed that GM-CSF significantly enhanced the viability of DCs treated with 5-FU or mitomycin C. The percentage of dead cells of DCs was determined by cell size using FACScan and GM-CSF was clearly effective. However, GM-CSF did not increase the expression of MHC class II on viable DCs gated, suggesting that GM-CSF may differentially regulate critical factors involved in the function of DCs. For the quantitative analysis of apoptosis, annexin V-FITC staining was performed. 5-FU induced the apoptosis of DCs and GM-CSF significantly protects DCs from 5-FU-induced apoptosis. Taken together, the results in this study that GM-CSF has an anti-apoptosis effect on DCs may provide patients with cancer with clinical benefits to overcome the immunosuppression induced by the decrease of number and functional insufficiency of DCs.
주홍진(Hong-Jin Joo),황인선(In-Seon Hwang),곽희열(Hee-Youl Kwak) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6
This study was carried out to evaluate the performance for Multi Effect Distillation(MED) with solar energy desalination system. It designed and manufactured Multi effect distillation with 3㎥/day capacity in order to perform of evaluation. The parameters relating with the performance of Multi Effect Distillation are known as hot water flow rate. The experimental conditions for each parameters were 18 ℃ for sea water inlet temperature, 75 ℃ for hot water inlet temperature, 2.4, 3.6, and 4.8 ㎥/hour for hot water inlet volume flow rate, respectively. The results are as follows, Development for Multi effect distillation is required about 40㎾ heat source to produce 3㎥/day of fresh water. Based on the results of this study, It makes possible to secure economics of desalination system with solar energy which is basically needed development of high efficiency fresh water generator
주홍돈(Hongdon Joo),장직현(J. Chang) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.1A
다자간의 계약서 서명 프로토콜은 Asokan등[1]에 의하여 제안되었다. 비동기 네트워크에서 다자간의 계약서 서명 프로토콜은 동기 네트워크에 비하여 효율성이 떨어져 그에 대한 연구가 많이 이루어졌다[2,3,4]. 지금까지 알려진 비동기 환경에서 가장 효율적인 다자간의 계약서 서명 프로토콜은 Waidner[4]에 의하여 제시되었다. 본 논문에서는 Waidner[4]가 제시한 프로토콜을 기본으로 하여 라운드 수를 줄인프로토콜을 제시한다.
주홍구,우희종 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.4
The expression of galectin-3 protein in four different gastric cancer cell lines and lymph node tissues of patients with gastric carcinoma was studied by Western blotting, immundhistochenustry and flow cytometry analysis. Western blot analysis of galectin-3 using anti-galectin-3 , mAb indicated that a 29 kDa protein was expressed in 3 gastric cancer cell lines, AGS, KATO BI , and SNU16, but not in SNU1 which was a non-adherent cell line. Interestingly, SNU16 cells secreted galectin-3 into the culture media. Flow cytometry analysis revealed that NIH3T3, AGS, and KATO III cells expressed the galectin-3 on the cell surface. The level a))' galectin-3 expression was highest in AGS (91.5%), high in KATO M (69.5%), and low in NIH3T3 (55.8%). The gastric cancer cells metastasized into .lymph node tissues were heavily stained whereas normal lymphocytes were not stained. This study suggested that the expression of galectin-3 and the metastasis of gastric cancer cells might be correlated.
용융탄산염 전해질에서 이산화탄소의 전기화학적 전환에 전극 재질이 미치는 영향
주홍수(Hong Su Ju),엄성용(Seong Yong Eom),강기중(Ki Joong Kang),최경민(Gyung Min Choi),김덕줄(Duck Jool Kim) 대한기계학회 2017 大韓機械學會論文集B Vol.41 No.11
이산화탄소의 농도를 줄이는 방법 중 하나로 전기화학을 이용하여 이산화탄소를 고부가 가치인 탄소로 전환하는 연구가 진행 중이다. 본 연구에서는 4.0 V, 600℃의 실험 조건에서 은, 니켈, 백금, 이리듐 전극을 사용하였다. 720분 동안 이산화탄소의 전환을 수행하였으며, 각 전극에서 생성된 탄소는 열중량 분석 및 XRD 분석을 수행하였다. 이산화탄소의 전환 및 생성 탄소의 양은 은, 백금, 니켈, 이리듐으로 나타났다. 열중량 분석을 통해 각 전극에서 생성된 탄소는 유사한 열 반응성을 가지며, XRD 분석을 통해 전극의 반응성에 따라 탄소의 결정성이 달라짐을 확인할 수 있었다. 은 전극은 전기화학적 전환 성능은 가장 높지만 약한 내구성을 보이며, 전극의 반응성 및 내구성을 고려하였을 때 백금이 4개의 재질 중에서 가장 적합함을 확인하였다. The electrochemical conversion of CO₂ is one of the methods for reducing CO₂. Four materials (Ag, Ni, Pt, and Ir) were selected as the electrodes. The electrochemical conversion was performed under a cell voltage of 4.0 V at 600°C. The amounts of CO₂ reduction and carbon production were at the highest for Ag, followed by, Pt, Ni, and then Ir. The produced carbon samples were analyzed by thermogravimetric analysis and XRD. The thermogravimetric analysis results indicated that all the carbon produced at each electrode exhibited similar thermal reactivity. The XRD results showed that the crystallization of carbon was different depending on the electrode utilized. Although electrochemical conversion was the highest for the Ag electrode, a loss of material accompanied it. Therefore, for this study, the optimal electrode is Pt, taking into account reactivity and material losses.
태양에너지 해수담수화를 위한 증발식 다중효용 담수기 개발
주홍진(Joo Hong-Jin),황인선(Hwang In-Seon),윤상국(Yun Sang-kook),윤응상(Yun Eung-San),서태범(Seo Tae-Beom),곽희열(Kwak Hee-you) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
This study was carried out to evaluate the performance for Multi Effect Distillation(MED) with solar energy desalination system. It designed and manufactured Multi effect distillation with 3㎥/day capacity in order to perform of evaluation. The parameters relating with the performance of Multi Effect Distillation are known as hot water flow rate. The experimental conditions for each parameters were 18℃ for sea water inlet temperature, 75℃ for hot water inlet temperature, 2.4, 3.6, and 4.8 ㎥/hour for hot water inlet volume flow rate, respectively. The results are as follows, Development for Multi effect distillation is required about 40㎾ heat source to produce 3㎥/day of fresh water. Based on the results of this study, It makes possible to secure economics of desalination system with solar energy which is basically needed development of high efficiency fresh water generator